diff options
Diffstat (limited to 'libraries/libldap_r')
| -rw-r--r-- | libraries/libldap_r/Makefile.in | 88 | ||||
| -rw-r--r-- | libraries/libldap_r/ldap_thr_debug.h | 191 | ||||
| -rw-r--r-- | libraries/libldap_r/rdwr.c | 458 | ||||
| -rw-r--r-- | libraries/libldap_r/rmutex.c | 219 | ||||
| -rw-r--r-- | libraries/libldap_r/rq.c | 221 | ||||
| -rw-r--r-- | libraries/libldap_r/thr_cthreads.c | 180 | ||||
| -rw-r--r-- | libraries/libldap_r/thr_debug.c | 1292 | ||||
| -rw-r--r-- | libraries/libldap_r/thr_nt.c | 245 | ||||
| -rw-r--r-- | libraries/libldap_r/thr_posix.c | 388 | ||||
| -rw-r--r-- | libraries/libldap_r/thr_pth.c | 231 | ||||
| -rw-r--r-- | libraries/libldap_r/thr_stub.c | 305 | ||||
| -rw-r--r-- | libraries/libldap_r/thr_thr.c | 186 | ||||
| -rw-r--r-- | libraries/libldap_r/threads.c | 113 | ||||
| -rw-r--r-- | libraries/libldap_r/tpool.c | 1032 |
14 files changed, 5149 insertions, 0 deletions
diff --git a/libraries/libldap_r/Makefile.in b/libraries/libldap_r/Makefile.in new file mode 100644 index 0000000..85eff3d --- /dev/null +++ b/libraries/libldap_r/Makefile.in @@ -0,0 +1,88 @@ +# Makefile.in for LDAP -lldap +# $OpenLDAP$ +## This work is part of OpenLDAP Software <http://www.openldap.org/>. +## +## Copyright 1998-2021 The OpenLDAP Foundation. +## All rights reserved. +## +## Redistribution and use in source and binary forms, with or without +## modification, are permitted only as authorized by the OpenLDAP +## Public License. +## +## A copy of this license is available in the file LICENSE in the +## top-level directory of the distribution or, alternatively, at +## <http://www.OpenLDAP.org/license.html>. + +LIBRARY = libldap_r.la + +PROGRAMS = apitest ltest + +XXDIR = $(srcdir)/../libldap +XXSRCS = apitest.c test.c \ + bind.c open.c result.c error.c compare.c search.c \ + controls.c messages.c references.c extended.c cyrus.c \ + modify.c add.c modrdn.c delete.c abandon.c \ + sasl.c gssapi.c sbind.c unbind.c cancel.c \ + filter.c free.c sort.c passwd.c whoami.c \ + getdn.c getentry.c getattr.c getvalues.c addentry.c \ + request.c os-ip.c url.c pagectrl.c sortctrl.c vlvctrl.c \ + init.c options.c print.c string.c util-int.c schema.c \ + charray.c os-local.c dnssrv.c utf-8.c utf-8-conv.c \ + tls2.c tls_o.c tls_g.c tls_m.c \ + turn.c ppolicy.c dds.c txn.c ldap_sync.c stctrl.c \ + assertion.c deref.c ldif.c fetch.c +SRCS = threads.c rdwr.c rmutex.c tpool.c rq.c \ + thr_posix.c thr_cthreads.c thr_thr.c thr_nt.c \ + thr_pth.c thr_stub.c thr_debug.c +OBJS = threads.lo rdwr.lo rmutex.lo tpool.lo rq.lo \ + thr_posix.lo thr_cthreads.lo thr_thr.lo thr_nt.lo \ + thr_pth.lo thr_stub.lo thr_debug.lo \ + bind.lo open.lo result.lo error.lo compare.lo search.lo \ + controls.lo messages.lo references.lo extended.lo cyrus.lo \ + modify.lo add.lo modrdn.lo delete.lo abandon.lo \ + sasl.lo gssapi.lo sbind.lo unbind.lo cancel.lo \ + filter.lo free.lo sort.lo passwd.lo whoami.lo \ + getdn.lo getentry.lo getattr.lo getvalues.lo addentry.lo \ + request.lo os-ip.lo url.lo pagectrl.lo sortctrl.lo vlvctrl.lo \ + init.lo options.lo print.lo string.lo util-int.lo schema.lo \ + charray.lo os-local.lo dnssrv.lo utf-8.lo utf-8-conv.lo \ + tls2.lo tls_o.lo tls_g.lo tls_m.lo \ + turn.lo ppolicy.lo dds.lo txn.lo ldap_sync.lo stctrl.lo \ + assertion.lo deref.lo ldif.lo fetch.lo + +LDAP_INCDIR= ../../include +LDAP_LIBDIR= ../../libraries + +LIB_DEFS = -DLDAP_LIBRARY + +XDEFS = -DLDAP_R_COMPILE -I$(XXDIR) +XLIBS = $(LIBRARY) $(LDAP_LIBLBER_LA) $(LDAP_LIBLUTIL_A) +XXLIBS = $(SECURITY_LIBS) $(LUTIL_LIBS) +XXXLIBS = $(LTHREAD_LIBS) +NT_LINK_LIBS = $(LDAP_LIBLBER_LA) $(AC_LIBS) $(SECURITY_LIBS) +UNIX_LINK_LIBS = $(LDAP_LIBLBER_LA) $(AC_LIBS) $(SECURITY_LIBS) $(LTHREAD_LIBS) + +.links : Makefile + @for i in $(XXSRCS); do \ + $(RM) $$i ; \ + $(LN_S) $(XXDIR)/$$i . ; \ + done + touch .links + +$(XXSRCS) : .links + +clean-local: FORCE + @$(RM) .links + +depend-common: .links + +apitest: $(XLIBS) apitest.o + $(LTLINK) -o $@ apitest.o $(LIBS) +ltest: $(XLIBS) test.o + $(LTLINK) -o $@ test.o $(LIBS) + +install-local: $(CFFILES) FORCE + -$(MKDIR) $(DESTDIR)$(libdir) + $(LTINSTALL) $(INSTALLFLAGS) -m 644 $(LIBRARY) $(DESTDIR)$(libdir) + $(LTFINISH) $(DESTDIR)$(libdir) + diff --git a/libraries/libldap_r/ldap_thr_debug.h b/libraries/libldap_r/ldap_thr_debug.h new file mode 100644 index 0000000..6bf9314 --- /dev/null +++ b/libraries/libldap_r/ldap_thr_debug.h @@ -0,0 +1,191 @@ +/* ldap_thr_debug.h - preprocessor magic for LDAP_THREAD_DEBUG */ +/* $OpenLDAP$ */ +/* This work is part of OpenLDAP Software <http://www.openldap.org/>. + * + * Copyright 2005-2021 The OpenLDAP Foundation. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted only as authorized by the OpenLDAP + * Public License. + * + * A copy of this license is available in the file LICENSE in the + * top-level directory of the distribution or, alternatively, at + * <http://www.OpenLDAP.org/license.html>. + */ + +#ifdef LDAP_THREAD_DEBUG + +/* + * libldap_r .c files should include this file after ldap_pvt_thread.h, + * with the appropriate LDAP_THREAD*_IMPLEMENTATION macro(s) defined. + */ + +#ifndef _LDAP_PVT_THREAD_H +#error "ldap_pvt_thread.h" must be included before "ldap_thr_debug.h" +#endif + +/* + * Support for thr_debug.c: + * + * thr_debug.c defines ldap_pvt_thread_* as wrappers around the real + * ldap_pvt_thread_* implementation, which this file renames to + * ldap_int_thread_*. + * + * Implementation: + * + * This file re#defines selected ldap_pvt_thread_* names to + * ldap_int_thread_*, which will be used from wrappers in thr_debug.c. + * Two ldap_int_*() calls are redirected to call ldap_debug_*(): These + * are wrappers around the originals, whose definitions are not renamed. + * This file then #includes ldap_pvt_thread.h to declare the renamed + * functions/types. If #included from thr_debug.c it finally #undefines + * the macros again. + * + * include/ldap_pvt_thread.h declares the typedefs ldap_pvt_thread*_t as + * either wrapper types ldap_debug_thread*_t or their usual definitions + * ldap_int_thread*_t, depending on the LDAP_THREAD_DEBUG_WRAP option. + * When defining the underlying implementation, this file then redirects + * the type names back to the original ldap_int_thread*_t types. + * include/ldap_<int,pvt>_thread.h also do some thr_debug magic. + * + * So, + * libldap_r/<not thr_debug.c> thus define ldap_int_thread_*() instead + * of ldap_pvt_thread_*(). + * thr_debug.c defines the ldap_pvt_*() and ldap_debug_*() functions. + * In thread.c, ldap_pvt_thread_<initialize/destroy>() will call + * ldap_debug_thread_*() instead of ldap_int_thread_*(). + * In tpool.c, ldap_int_thread_pool_shutdown() has explicit thr_debug.c + * support which treats ldap_pvt_thread_pool_destroy() the same way. + */ + +#ifndef LDAP_THREAD_IMPLEMENTATION /* for first part of threads.c */ +#define ldap_int_thread_initialize ldap_debug_thread_initialize +#define ldap_int_thread_destroy ldap_debug_thread_destroy +#else /* LDAP_THREAD_IMPLEMENTATION -- for thr_*.c and end of threads.c */ +#undef ldap_int_thread_initialize +#undef ldap_int_thread_destroy +#ifdef LDAP_THREAD_DEBUG_WRAP /* see ldap_pvt_thread.h */ +#define ldap_pvt_thread_mutex_t ldap_int_thread_mutex_t +#define ldap_pvt_thread_cond_t ldap_int_thread_cond_t +#endif +#define ldap_pvt_thread_sleep ldap_int_thread_sleep +#define ldap_pvt_thread_get_concurrency ldap_int_thread_get_concurrency +#define ldap_pvt_thread_set_concurrency ldap_int_thread_set_concurrency +#define ldap_pvt_thread_create ldap_int_thread_create +#define ldap_pvt_thread_exit ldap_int_thread_exit +#define ldap_pvt_thread_join ldap_int_thread_join +#define ldap_pvt_thread_kill ldap_int_thread_kill +#define ldap_pvt_thread_yield ldap_int_thread_yield +#define ldap_pvt_thread_cond_init ldap_int_thread_cond_init +#define ldap_pvt_thread_cond_destroy ldap_int_thread_cond_destroy +#define ldap_pvt_thread_cond_signal ldap_int_thread_cond_signal +#define ldap_pvt_thread_cond_broadcast ldap_int_thread_cond_broadcast +#define ldap_pvt_thread_cond_wait ldap_int_thread_cond_wait +#define ldap_pvt_thread_mutex_init ldap_int_thread_mutex_init +#define ldap_pvt_thread_mutex_destroy ldap_int_thread_mutex_destroy +#define ldap_pvt_thread_mutex_lock ldap_int_thread_mutex_lock +#define ldap_pvt_thread_mutex_trylock ldap_int_thread_mutex_trylock +#define ldap_pvt_thread_mutex_unlock ldap_int_thread_mutex_unlock +#define ldap_pvt_thread_self ldap_int_thread_self +#endif /* LDAP_THREAD_IMPLEMENTATION */ + +#ifdef LDAP_THREAD_RDWR_IMPLEMENTATION /* rdwr.c, thr_debug.c */ +#ifdef LDAP_THREAD_DEBUG_WRAP /* see ldap_pvt_thread.h */ +#define ldap_pvt_thread_rdwr_t ldap_int_thread_rdwr_t +#endif +#define ldap_pvt_thread_rdwr_init ldap_int_thread_rdwr_init +#define ldap_pvt_thread_rdwr_destroy ldap_int_thread_rdwr_destroy +#define ldap_pvt_thread_rdwr_rlock ldap_int_thread_rdwr_rlock +#define ldap_pvt_thread_rdwr_rtrylock ldap_int_thread_rdwr_rtrylock +#define ldap_pvt_thread_rdwr_runlock ldap_int_thread_rdwr_runlock +#define ldap_pvt_thread_rdwr_wlock ldap_int_thread_rdwr_wlock +#define ldap_pvt_thread_rdwr_wtrylock ldap_int_thread_rdwr_wtrylock +#define ldap_pvt_thread_rdwr_wunlock ldap_int_thread_rdwr_wunlock +#define ldap_pvt_thread_rdwr_readers ldap_int_thread_rdwr_readers +#define ldap_pvt_thread_rdwr_writers ldap_int_thread_rdwr_writers +#define ldap_pvt_thread_rdwr_active ldap_int_thread_rdwr_active +#endif /* LDAP_THREAD_RDWR_IMPLEMENTATION */ + +#ifdef LDAP_THREAD_POOL_IMPLEMENTATION /* tpool.c, thr_stub.c, thr_debug.c */ +#ifdef LDAP_THREAD_DEBUG_WRAP /* see ldap_pvt_thread.h */ +#define ldap_pvt_thread_pool_t ldap_int_thread_pool_t +#endif +#define ldap_pvt_thread_pool_init ldap_int_thread_pool_init +#define ldap_pvt_thread_pool_submit ldap_int_thread_pool_submit +#define ldap_pvt_thread_pool_maxthreads ldap_int_thread_pool_maxthreads +#define ldap_pvt_thread_pool_backload ldap_int_thread_pool_backload +#define ldap_pvt_thread_pool_pause ldap_int_thread_pool_pause +#define ldap_pvt_thread_pool_resume ldap_int_thread_pool_resume +#define ldap_pvt_thread_pool_destroy ldap_int_thread_pool_destroy +#define ldap_pvt_thread_pool_getkey ldap_int_thread_pool_getkey +#define ldap_pvt_thread_pool_setkey ldap_int_thread_pool_setkey +#define ldap_pvt_thread_pool_purgekey ldap_int_thread_pool_purgekey +#define ldap_pvt_thread_pool_context ldap_int_thread_pool_context +#define ldap_pvt_thread_pool_context_reset ldap_int_thread_pool_context_reset +#endif /* LDAP_THREAD_POOL_IMPLEMENTATION */ + +#undef _LDAP_PVT_THREAD_H +#include "ldap_pvt_thread.h" + +#ifdef LDAP_THREAD_POOL_IMPLEMENTATION /* tpool.c */ +/* + * tpool.c:ldap_int_thread_pool_shutdown() needs this. Could not + * use it for ldap_pvt_thread.h above because of its use of LDAP_P(). + */ +#undef ldap_pvt_thread_pool_destroy +#define ldap_pvt_thread_pool_destroy(p,r) ldap_int_thread_pool_destroy(p,r) +#endif + +#ifdef LDAP_THREAD_DEBUG_IMPLEMENTATION /* thr_debug.c */ +#undef ldap_pvt_thread_mutex_t +#undef ldap_pvt_thread_cond_t +#undef ldap_pvt_thread_sleep +#undef ldap_pvt_thread_get_concurrency +#undef ldap_pvt_thread_set_concurrency +#undef ldap_pvt_thread_create +#undef ldap_pvt_thread_exit +#undef ldap_pvt_thread_join +#undef ldap_pvt_thread_kill +#undef ldap_pvt_thread_yield +#undef ldap_pvt_thread_cond_init +#undef ldap_pvt_thread_cond_destroy +#undef ldap_pvt_thread_cond_signal +#undef ldap_pvt_thread_cond_broadcast +#undef ldap_pvt_thread_cond_wait +#undef ldap_pvt_thread_mutex_init +#undef ldap_pvt_thread_mutex_destroy +#undef ldap_pvt_thread_mutex_lock +#undef ldap_pvt_thread_mutex_trylock +#undef ldap_pvt_thread_mutex_unlock +#undef ldap_pvt_thread_self +/* LDAP_THREAD_RDWR_IMPLEMENTATION: */ +#undef ldap_pvt_thread_rdwr_t +#undef ldap_pvt_thread_rdwr_init +#undef ldap_pvt_thread_rdwr_destroy +#undef ldap_pvt_thread_rdwr_rlock +#undef ldap_pvt_thread_rdwr_rtrylock +#undef ldap_pvt_thread_rdwr_runlock +#undef ldap_pvt_thread_rdwr_wlock +#undef ldap_pvt_thread_rdwr_wtrylock +#undef ldap_pvt_thread_rdwr_wunlock +#undef ldap_pvt_thread_rdwr_readers +#undef ldap_pvt_thread_rdwr_writers +#undef ldap_pvt_thread_rdwr_active +/* LDAP_THREAD_POOL_IMPLEMENTATION: */ +#undef ldap_pvt_thread_pool_t +#undef ldap_pvt_thread_pool_init +#undef ldap_pvt_thread_pool_submit +#undef ldap_pvt_thread_pool_maxthreads +#undef ldap_pvt_thread_pool_backload +#undef ldap_pvt_thread_pool_pause +#undef ldap_pvt_thread_pool_resume +#undef ldap_pvt_thread_pool_destroy +#undef ldap_pvt_thread_pool_getkey +#undef ldap_pvt_thread_pool_setkey +#undef ldap_pvt_thread_pool_purgekey +#undef ldap_pvt_thread_pool_context +#undef ldap_pvt_thread_pool_context_reset +#endif /* LDAP_THREAD_DEBUG_IMPLEMENTATION */ + +#endif /* LDAP_THREAD_DEBUG */ diff --git a/libraries/libldap_r/rdwr.c b/libraries/libldap_r/rdwr.c new file mode 100644 index 0000000..424e83e --- /dev/null +++ b/libraries/libldap_r/rdwr.c @@ -0,0 +1,458 @@ +/* $OpenLDAP$ */ +/* This work is part of OpenLDAP Software <http://www.openldap.org/>. + * + * Copyright 1998-2021 The OpenLDAP Foundation. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted only as authorized by the OpenLDAP + * Public License. + * + * A copy of this license is available in file LICENSE in the + * top-level directory of the distribution or, alternatively, at + * <http://www.OpenLDAP.org/license.html>. + */ +/* This work was initially developed by Kurt D. Zeilenga for inclusion + * in OpenLDAP Software. Additional significant contributors include: + * Stuart Lynne + */ + +/* + * This is an improved implementation of Reader/Writer locks does + * not protect writers from starvation. That is, if a writer is + * currently waiting on a reader, any new reader will get + * the lock before the writer. + * + * Does not support cancellation nor does any status checking. + */ +/* Adapted from publically available examples for: + * "Programming with Posix Threads" + * by David R Butenhof, Addison-Wesley + * http://cseng.aw.com/bookpage.taf?ISBN=0-201-63392-2 + */ + +#include "portable.h" + +#include <ac/stdlib.h> + +#include <ac/errno.h> +#include <ac/string.h> +#include <ac/time.h> + +#include "ldap-int.h" +#include "ldap_pvt_thread.h" /* Get the thread interface */ +#define LDAP_THREAD_RDWR_IMPLEMENTATION +#include "ldap_thr_debug.h" /* May rename the symbols defined below */ + +/* + * implementations that provide their own compatible + * reader/writer locks define LDAP_THREAD_HAVE_RDWR + * in ldap_pvt_thread.h + */ +#ifndef LDAP_THREAD_HAVE_RDWR + +struct ldap_int_thread_rdwr_s { + ldap_pvt_thread_mutex_t ltrw_mutex; + ldap_pvt_thread_cond_t ltrw_read; /* wait for read */ + ldap_pvt_thread_cond_t ltrw_write; /* wait for write */ + int ltrw_valid; +#define LDAP_PVT_THREAD_RDWR_VALID 0x0bad + int ltrw_r_active; + int ltrw_w_active; + int ltrw_r_wait; + int ltrw_w_wait; +#ifdef LDAP_RDWR_DEBUG + /* keep track of who has these locks */ +#define MAX_READERS 32 + int ltrw_more_readers; /* Set if ltrw_readers[] is incomplete */ + ldap_pvt_thread_t ltrw_readers[MAX_READERS]; + ldap_pvt_thread_t ltrw_writer; +#endif +}; + +int +ldap_pvt_thread_rdwr_init( ldap_pvt_thread_rdwr_t *rwlock ) +{ + struct ldap_int_thread_rdwr_s *rw; + + assert( rwlock != NULL ); + + rw = (struct ldap_int_thread_rdwr_s *) LDAP_CALLOC( 1, + sizeof( struct ldap_int_thread_rdwr_s ) ); + if ( !rw ) + return LDAP_NO_MEMORY; + + /* we should check return results */ + ldap_pvt_thread_mutex_init( &rw->ltrw_mutex ); + ldap_pvt_thread_cond_init( &rw->ltrw_read ); + ldap_pvt_thread_cond_init( &rw->ltrw_write ); + + rw->ltrw_valid = LDAP_PVT_THREAD_RDWR_VALID; + + *rwlock = rw; + return 0; +} + +int +ldap_pvt_thread_rdwr_destroy( ldap_pvt_thread_rdwr_t *rwlock ) +{ + struct ldap_int_thread_rdwr_s *rw; + + assert( rwlock != NULL ); + rw = *rwlock; + + assert( rw != NULL ); + assert( rw->ltrw_valid == LDAP_PVT_THREAD_RDWR_VALID ); + + if( rw->ltrw_valid != LDAP_PVT_THREAD_RDWR_VALID ) + return LDAP_PVT_THREAD_EINVAL; + + ldap_pvt_thread_mutex_lock( &rw->ltrw_mutex ); + + assert( rw->ltrw_w_active >= 0 ); + assert( rw->ltrw_w_wait >= 0 ); + assert( rw->ltrw_r_active >= 0 ); + assert( rw->ltrw_r_wait >= 0 ); + + /* active threads? */ + if( rw->ltrw_r_active > 0 || rw->ltrw_w_active > 0) { + ldap_pvt_thread_mutex_unlock( &rw->ltrw_mutex ); + return LDAP_PVT_THREAD_EBUSY; + } + + /* waiting threads? */ + if( rw->ltrw_r_wait > 0 || rw->ltrw_w_wait > 0) { + ldap_pvt_thread_mutex_unlock( &rw->ltrw_mutex ); + return LDAP_PVT_THREAD_EBUSY; + } + + rw->ltrw_valid = 0; + + ldap_pvt_thread_mutex_unlock( &rw->ltrw_mutex ); + + ldap_pvt_thread_mutex_destroy( &rw->ltrw_mutex ); + ldap_pvt_thread_cond_destroy( &rw->ltrw_read ); + ldap_pvt_thread_cond_destroy( &rw->ltrw_write ); + + LDAP_FREE(rw); + *rwlock = NULL; + return 0; +} + +int ldap_pvt_thread_rdwr_rlock( ldap_pvt_thread_rdwr_t *rwlock ) +{ + struct ldap_int_thread_rdwr_s *rw; + + assert( rwlock != NULL ); + rw = *rwlock; + + assert( rw != NULL ); + assert( rw->ltrw_valid == LDAP_PVT_THREAD_RDWR_VALID ); + + if( rw->ltrw_valid != LDAP_PVT_THREAD_RDWR_VALID ) + return LDAP_PVT_THREAD_EINVAL; + + ldap_pvt_thread_mutex_lock( &rw->ltrw_mutex ); + + assert( rw->ltrw_w_active >= 0 ); + assert( rw->ltrw_w_wait >= 0 ); + assert( rw->ltrw_r_active >= 0 ); + assert( rw->ltrw_r_wait >= 0 ); + + if( rw->ltrw_w_active > 0 ) { + /* writer is active */ + + rw->ltrw_r_wait++; + + do { + ldap_pvt_thread_cond_wait( + &rw->ltrw_read, &rw->ltrw_mutex ); + } while( rw->ltrw_w_active > 0 ); + + rw->ltrw_r_wait--; + assert( rw->ltrw_r_wait >= 0 ); + } + +#ifdef LDAP_RDWR_DEBUG + if( rw->ltrw_r_active < MAX_READERS ) + rw->ltrw_readers[rw->ltrw_r_active] = ldap_pvt_thread_self(); + else + rw->ltrw_more_readers = 1; +#endif + rw->ltrw_r_active++; + + + ldap_pvt_thread_mutex_unlock( &rw->ltrw_mutex ); + + return 0; +} + +int ldap_pvt_thread_rdwr_rtrylock( ldap_pvt_thread_rdwr_t *rwlock ) +{ + struct ldap_int_thread_rdwr_s *rw; + + assert( rwlock != NULL ); + rw = *rwlock; + + assert( rw != NULL ); + assert( rw->ltrw_valid == LDAP_PVT_THREAD_RDWR_VALID ); + + if( rw->ltrw_valid != LDAP_PVT_THREAD_RDWR_VALID ) + return LDAP_PVT_THREAD_EINVAL; + + ldap_pvt_thread_mutex_lock( &rw->ltrw_mutex ); + + assert( rw->ltrw_w_active >= 0 ); + assert( rw->ltrw_w_wait >= 0 ); + assert( rw->ltrw_r_active >= 0 ); + assert( rw->ltrw_r_wait >= 0 ); + + if( rw->ltrw_w_active > 0) { + ldap_pvt_thread_mutex_unlock( &rw->ltrw_mutex ); + return LDAP_PVT_THREAD_EBUSY; + } + +#ifdef LDAP_RDWR_DEBUG + if( rw->ltrw_r_active < MAX_READERS ) + rw->ltrw_readers[rw->ltrw_r_active] = ldap_pvt_thread_self(); + else + rw->ltrw_more_readers = 1; +#endif + rw->ltrw_r_active++; + + ldap_pvt_thread_mutex_unlock( &rw->ltrw_mutex ); + + return 0; +} + +int ldap_pvt_thread_rdwr_runlock( ldap_pvt_thread_rdwr_t *rwlock ) +{ + struct ldap_int_thread_rdwr_s *rw; + + assert( rwlock != NULL ); + rw = *rwlock; + + assert( rw != NULL ); + assert( rw->ltrw_valid == LDAP_PVT_THREAD_RDWR_VALID ); + + if( rw->ltrw_valid != LDAP_PVT_THREAD_RDWR_VALID ) + return LDAP_PVT_THREAD_EINVAL; + + ldap_pvt_thread_mutex_lock( &rw->ltrw_mutex ); + + rw->ltrw_r_active--; +#ifdef LDAP_RDWR_DEBUG + /* Remove us from the list of readers */ + { + ldap_pvt_thread_t self = ldap_pvt_thread_self(); + int i, j; + for( i = j = rw->ltrw_r_active; i >= 0; i--) { + if (rw->ltrw_readers[i] == self) { + rw->ltrw_readers[i] = rw->ltrw_readers[j]; + rw->ltrw_readers[j] = 0; + break; + } + } + if( !rw->ltrw_more_readers ) + assert( i >= 0 ); + else if( j == 0 ) + rw->ltrw_more_readers = 0; + } +#endif + + assert( rw->ltrw_w_active >= 0 ); + assert( rw->ltrw_w_wait >= 0 ); + assert( rw->ltrw_r_active >= 0 ); + assert( rw->ltrw_r_wait >= 0 ); + + if (rw->ltrw_r_active == 0 && rw->ltrw_w_wait > 0 ) { + ldap_pvt_thread_cond_signal( &rw->ltrw_write ); + } + + ldap_pvt_thread_mutex_unlock( &rw->ltrw_mutex ); + + return 0; +} + +int ldap_pvt_thread_rdwr_wlock( ldap_pvt_thread_rdwr_t *rwlock ) +{ + struct ldap_int_thread_rdwr_s *rw; + + assert( rwlock != NULL ); + rw = *rwlock; + + assert( rw != NULL ); + assert( rw->ltrw_valid == LDAP_PVT_THREAD_RDWR_VALID ); + + if( rw->ltrw_valid != LDAP_PVT_THREAD_RDWR_VALID ) + return LDAP_PVT_THREAD_EINVAL; + + ldap_pvt_thread_mutex_lock( &rw->ltrw_mutex ); + + assert( rw->ltrw_w_active >= 0 ); + assert( rw->ltrw_w_wait >= 0 ); + assert( rw->ltrw_r_active >= 0 ); + assert( rw->ltrw_r_wait >= 0 ); + + if ( rw->ltrw_w_active > 0 || rw->ltrw_r_active > 0 ) { + rw->ltrw_w_wait++; + + do { + ldap_pvt_thread_cond_wait( + &rw->ltrw_write, &rw->ltrw_mutex ); + } while ( rw->ltrw_w_active > 0 || rw->ltrw_r_active > 0 ); + + rw->ltrw_w_wait--; + assert( rw->ltrw_w_wait >= 0 ); + } + +#ifdef LDAP_RDWR_DEBUG + rw->ltrw_writer = ldap_pvt_thread_self(); +#endif + rw->ltrw_w_active++; + + ldap_pvt_thread_mutex_unlock( &rw->ltrw_mutex ); + + return 0; +} + +int ldap_pvt_thread_rdwr_wtrylock( ldap_pvt_thread_rdwr_t *rwlock ) +{ + struct ldap_int_thread_rdwr_s *rw; + + assert( rwlock != NULL ); + rw = *rwlock; + + assert( rw != NULL ); + assert( rw->ltrw_valid == LDAP_PVT_THREAD_RDWR_VALID ); + + if( rw->ltrw_valid != LDAP_PVT_THREAD_RDWR_VALID ) + return LDAP_PVT_THREAD_EINVAL; + + ldap_pvt_thread_mutex_lock( &rw->ltrw_mutex ); + + assert( rw->ltrw_w_active >= 0 ); + assert( rw->ltrw_w_wait >= 0 ); + assert( rw->ltrw_r_active >= 0 ); + assert( rw->ltrw_r_wait >= 0 ); + + if ( rw->ltrw_w_active > 0 || rw->ltrw_r_active > 0 ) { + ldap_pvt_thread_mutex_unlock( &rw->ltrw_mutex ); + return LDAP_PVT_THREAD_EBUSY; + } + +#ifdef LDAP_RDWR_DEBUG + rw->ltrw_writer = ldap_pvt_thread_self(); +#endif + rw->ltrw_w_active++; + + ldap_pvt_thread_mutex_unlock( &rw->ltrw_mutex ); + + return 0; +} + +int ldap_pvt_thread_rdwr_wunlock( ldap_pvt_thread_rdwr_t *rwlock ) +{ + struct ldap_int_thread_rdwr_s *rw; + + assert( rwlock != NULL ); + rw = *rwlock; + + assert( rw != NULL ); + assert( rw->ltrw_valid == LDAP_PVT_THREAD_RDWR_VALID ); + + if( rw->ltrw_valid != LDAP_PVT_THREAD_RDWR_VALID ) + return LDAP_PVT_THREAD_EINVAL; + + ldap_pvt_thread_mutex_lock( &rw->ltrw_mutex ); + + rw->ltrw_w_active--; + + assert( rw->ltrw_w_active >= 0 ); + assert( rw->ltrw_w_wait >= 0 ); + assert( rw->ltrw_r_active >= 0 ); + assert( rw->ltrw_r_wait >= 0 ); + + if (rw->ltrw_r_wait > 0) { + ldap_pvt_thread_cond_broadcast( &rw->ltrw_read ); + + } else if (rw->ltrw_w_wait > 0) { + ldap_pvt_thread_cond_signal( &rw->ltrw_write ); + } + +#ifdef LDAP_RDWR_DEBUG + assert( rw->ltrw_writer == ldap_pvt_thread_self() ); + rw->ltrw_writer = 0; +#endif + ldap_pvt_thread_mutex_unlock( &rw->ltrw_mutex ); + + return 0; +} + +#ifdef LDAP_RDWR_DEBUG + +/* just for testing, + * return 0 if false, suitable for assert(ldap_pvt_thread_rdwr_Xchk(rdwr)) + * + * Currently they don't check if the calling thread is the one + * that has the lock, just that there is a reader or writer. + * + * Basically sufficent for testing that places that should have + * a lock are caught. + */ + +int ldap_pvt_thread_rdwr_readers(ldap_pvt_thread_rdwr_t *rwlock) +{ + struct ldap_int_thread_rdwr_s *rw; + + assert( rwlock != NULL ); + rw = *rwlock; + + assert( rw != NULL ); + assert( rw->ltrw_valid == LDAP_PVT_THREAD_RDWR_VALID ); + assert( rw->ltrw_w_active >= 0 ); + assert( rw->ltrw_w_wait >= 0 ); + assert( rw->ltrw_r_active >= 0 ); + assert( rw->ltrw_r_wait >= 0 ); + + return( rw->ltrw_r_active ); +} + +int ldap_pvt_thread_rdwr_writers(ldap_pvt_thread_rdwr_t *rwlock) +{ + struct ldap_int_thread_rdwr_s *rw; + + assert( rwlock != NULL ); + rw = *rwlock; + + assert( rw != NULL ); + assert( rw->ltrw_valid == LDAP_PVT_THREAD_RDWR_VALID ); + assert( rw->ltrw_w_active >= 0 ); + assert( rw->ltrw_w_wait >= 0 ); + assert( rw->ltrw_r_active >= 0 ); + assert( rw->ltrw_r_wait >= 0 ); + + return( rw->ltrw_w_active ); +} + +int ldap_pvt_thread_rdwr_active(ldap_pvt_thread_rdwr_t *rwlock) +{ + struct ldap_int_thread_rdwr_s *rw; + + assert( rwlock != NULL ); + rw = *rwlock; + + assert( rw != NULL ); + assert( rw->ltrw_valid == LDAP_PVT_THREAD_RDWR_VALID ); + assert( rw->ltrw_w_active >= 0 ); + assert( rw->ltrw_w_wait >= 0 ); + assert( rw->ltrw_r_active >= 0 ); + assert( rw->ltrw_r_wait >= 0 ); + + return(ldap_pvt_thread_rdwr_readers(rwlock) + + ldap_pvt_thread_rdwr_writers(rwlock)); +} + +#endif /* LDAP_RDWR_DEBUG */ + +#endif /* LDAP_THREAD_HAVE_RDWR */ diff --git a/libraries/libldap_r/rmutex.c b/libraries/libldap_r/rmutex.c new file mode 100644 index 0000000..6099a2a --- /dev/null +++ b/libraries/libldap_r/rmutex.c @@ -0,0 +1,219 @@ +/* $OpenLDAP$ */ +/* This work is part of OpenLDAP Software <http://www.openldap.org/>. + * + * Copyright 2006-2021 The OpenLDAP Foundation. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted only as authorized by the OpenLDAP + * Public License. + * + * A copy of this license is available in file LICENSE in the + * top-level directory of the distribution or, alternatively, at + * <http://www.OpenLDAP.org/license.html>. + */ +/* This work was initially developed by Howard Chu for inclusion + * in OpenLDAP Software. + */ + +/* + * This is an implementation of recursive mutexes. + */ + +#include "portable.h" + +#include <ac/stdlib.h> + +#include <ac/errno.h> +#include <ac/string.h> +#include <ac/time.h> + +#include "ldap-int.h" +#include "ldap_pvt_thread.h" /* Get the thread interface */ + +struct ldap_int_thread_rmutex_s { + ldap_pvt_thread_mutex_t ltrm_mutex; + ldap_pvt_thread_cond_t ltrm_cond; + ldap_pvt_thread_t ltrm_owner; + int ltrm_valid; +#define LDAP_PVT_THREAD_RMUTEX_VALID 0x0cdb + int ltrm_depth; + int ltrm_waits; +}; + +static const ldap_pvt_thread_t tid_zero; + +int +ldap_pvt_thread_rmutex_init( ldap_pvt_thread_rmutex_t *rmutex ) +{ + struct ldap_int_thread_rmutex_s *rm; + + assert( rmutex != NULL ); + + rm = (struct ldap_int_thread_rmutex_s *) LDAP_CALLOC( 1, + sizeof( struct ldap_int_thread_rmutex_s ) ); + if ( !rm ) + return LDAP_NO_MEMORY; + + /* we should check return results */ + ldap_pvt_thread_mutex_init( &rm->ltrm_mutex ); + ldap_pvt_thread_cond_init( &rm->ltrm_cond ); + + rm->ltrm_valid = LDAP_PVT_THREAD_RMUTEX_VALID; + + *rmutex = rm; + return 0; +} + +int +ldap_pvt_thread_rmutex_destroy( ldap_pvt_thread_rmutex_t *rmutex ) +{ + struct ldap_int_thread_rmutex_s *rm; + + assert( rmutex != NULL ); + rm = *rmutex; + + assert( rm != NULL ); + assert( rm->ltrm_valid == LDAP_PVT_THREAD_RMUTEX_VALID ); + + if( rm->ltrm_valid != LDAP_PVT_THREAD_RMUTEX_VALID ) + return LDAP_PVT_THREAD_EINVAL; + + ldap_pvt_thread_mutex_lock( &rm->ltrm_mutex ); + + assert( rm->ltrm_depth >= 0 ); + assert( rm->ltrm_waits >= 0 ); + + /* in use? */ + if( rm->ltrm_depth > 0 || rm->ltrm_waits > 0 ) { + ldap_pvt_thread_mutex_unlock( &rm->ltrm_mutex ); + return LDAP_PVT_THREAD_EBUSY; + } + + rm->ltrm_valid = 0; + + ldap_pvt_thread_mutex_unlock( &rm->ltrm_mutex ); + + ldap_pvt_thread_mutex_destroy( &rm->ltrm_mutex ); + ldap_pvt_thread_cond_destroy( &rm->ltrm_cond ); + + LDAP_FREE(rm); + *rmutex = NULL; + return 0; +} + +int ldap_pvt_thread_rmutex_lock( ldap_pvt_thread_rmutex_t *rmutex, + ldap_pvt_thread_t owner ) +{ + struct ldap_int_thread_rmutex_s *rm; + + assert( rmutex != NULL ); + rm = *rmutex; + + assert( rm != NULL ); + assert( rm->ltrm_valid == LDAP_PVT_THREAD_RMUTEX_VALID ); + + if( rm->ltrm_valid != LDAP_PVT_THREAD_RMUTEX_VALID ) + return LDAP_PVT_THREAD_EINVAL; + + ldap_pvt_thread_mutex_lock( &rm->ltrm_mutex ); + + assert( rm->ltrm_depth >= 0 ); + assert( rm->ltrm_waits >= 0 ); + + if( rm->ltrm_depth > 0 ) { + /* already locked */ + if ( !ldap_pvt_thread_equal( rm->ltrm_owner, owner )) { + rm->ltrm_waits++; + do { + ldap_pvt_thread_cond_wait( &rm->ltrm_cond, + &rm->ltrm_mutex ); + } while( rm->ltrm_depth > 0 ); + + rm->ltrm_waits--; + assert( rm->ltrm_waits >= 0 ); + rm->ltrm_owner = owner; + } + } else { + rm->ltrm_owner = owner; + } + + rm->ltrm_depth++; + + ldap_pvt_thread_mutex_unlock( &rm->ltrm_mutex ); + + return 0; +} + +int ldap_pvt_thread_rmutex_trylock( ldap_pvt_thread_rmutex_t *rmutex, + ldap_pvt_thread_t owner ) +{ + struct ldap_int_thread_rmutex_s *rm; + + assert( rmutex != NULL ); + rm = *rmutex; + + assert( rm != NULL ); + assert( rm->ltrm_valid == LDAP_PVT_THREAD_RMUTEX_VALID ); + + if( rm->ltrm_valid != LDAP_PVT_THREAD_RMUTEX_VALID ) + return LDAP_PVT_THREAD_EINVAL; + + ldap_pvt_thread_mutex_lock( &rm->ltrm_mutex ); + + assert( rm->ltrm_depth >= 0 ); + assert( rm->ltrm_waits >= 0 ); + + if( rm->ltrm_depth > 0 ) { + if ( !ldap_pvt_thread_equal( owner, rm->ltrm_owner )) { + ldap_pvt_thread_mutex_unlock( &rm->ltrm_mutex ); + return LDAP_PVT_THREAD_EBUSY; + } + } else { + rm->ltrm_owner = owner; + } + + rm->ltrm_depth++; + + ldap_pvt_thread_mutex_unlock( &rm->ltrm_mutex ); + + return 0; +} + +int ldap_pvt_thread_rmutex_unlock( ldap_pvt_thread_rmutex_t *rmutex, + ldap_pvt_thread_t owner ) +{ + struct ldap_int_thread_rmutex_s *rm; + + assert( rmutex != NULL ); + rm = *rmutex; + + assert( rm != NULL ); + assert( rm->ltrm_valid == LDAP_PVT_THREAD_RMUTEX_VALID ); + + if( rm->ltrm_valid != LDAP_PVT_THREAD_RMUTEX_VALID ) + return LDAP_PVT_THREAD_EINVAL; + + ldap_pvt_thread_mutex_lock( &rm->ltrm_mutex ); + + if( !ldap_pvt_thread_equal( owner, rm->ltrm_owner )) { + ldap_pvt_thread_mutex_unlock( &rm->ltrm_mutex ); + return LDAP_PVT_THREAD_EINVAL; + } + + rm->ltrm_depth--; + if ( !rm->ltrm_depth ) + rm->ltrm_owner = tid_zero; + + assert( rm->ltrm_depth >= 0 ); + assert( rm->ltrm_waits >= 0 ); + + if ( !rm->ltrm_depth && rm->ltrm_waits ) { + ldap_pvt_thread_cond_signal( &rm->ltrm_cond ); + } + + ldap_pvt_thread_mutex_unlock( &rm->ltrm_mutex ); + + return 0; +} + diff --git a/libraries/libldap_r/rq.c b/libraries/libldap_r/rq.c new file mode 100644 index 0000000..5857cc6 --- /dev/null +++ b/libraries/libldap_r/rq.c @@ -0,0 +1,221 @@ +/* $OpenLDAP$ */ +/* This work is part of OpenLDAP Software <http://www.openldap.org/>. + * + * Copyright 2003-2021 The OpenLDAP Foundation. + * Portions Copyright 2003 IBM Corporation. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted only as authorized by the OpenLDAP + * Public License. + * + * A copy of this license is available in file LICENSE in the + * top-level directory of the distribution or, alternatively, at + * <http://www.OpenLDAP.org/license.html>. + */ +/* This work was initially developed by Jong Hyuk Choi for inclusion + * in OpenLDAP Software. + */ + +#include "portable.h" + +#include <stdio.h> + +#include <ac/stdarg.h> +#include <ac/stdlib.h> +#include <ac/errno.h> +#include <ac/socket.h> +#include <ac/string.h> +#include <ac/time.h> + +#include "ldap-int.h" +#include "ldap_pvt_thread.h" +#include "ldap_queue.h" +#include "ldap_rq.h" + +struct re_s * +ldap_pvt_runqueue_insert( + struct runqueue_s* rq, + time_t interval, + ldap_pvt_thread_start_t *routine, + void *arg, + char *tname, + char *tspec +) +{ + struct re_s* entry; + + entry = (struct re_s *) LDAP_CALLOC( 1, sizeof( struct re_s )); + if ( entry ) { + entry->interval.tv_sec = interval; + entry->interval.tv_usec = 0; + entry->next_sched.tv_sec = time( NULL ); + entry->next_sched.tv_usec = 0; + entry->routine = routine; + entry->arg = arg; + entry->tname = tname; + entry->tspec = tspec; + LDAP_STAILQ_INSERT_HEAD( &rq->task_list, entry, tnext ); + } + return entry; +} + +struct re_s * +ldap_pvt_runqueue_find( + struct runqueue_s *rq, + ldap_pvt_thread_start_t *routine, + void *arg +) +{ + struct re_s* e; + + LDAP_STAILQ_FOREACH( e, &rq->task_list, tnext ) { + if ( e->routine == routine && e->arg == arg ) + return e; + } + return NULL; +} + +void +ldap_pvt_runqueue_remove( + struct runqueue_s* rq, + struct re_s* entry +) +{ + struct re_s* e; + + LDAP_STAILQ_FOREACH( e, &rq->task_list, tnext ) { + if ( e == entry) + break; + } + + assert( e == entry ); + + LDAP_STAILQ_REMOVE( &rq->task_list, entry, re_s, tnext ); + + LDAP_FREE( entry ); +} + +struct re_s* +ldap_pvt_runqueue_next_sched( + struct runqueue_s* rq, + struct timeval* next_run +) +{ + struct re_s* entry; + + entry = LDAP_STAILQ_FIRST( &rq->task_list ); + if ( entry == NULL || entry->next_sched.tv_sec == 0 ) { + return NULL; + } else { + *next_run = entry->next_sched; + return entry; + } +} + +void +ldap_pvt_runqueue_runtask( + struct runqueue_s* rq, + struct re_s* entry +) +{ + LDAP_STAILQ_INSERT_TAIL( &rq->run_list, entry, rnext ); +} + +void +ldap_pvt_runqueue_stoptask( + struct runqueue_s* rq, + struct re_s* entry +) +{ + LDAP_STAILQ_REMOVE( &rq->run_list, entry, re_s, rnext ); +} + +int +ldap_pvt_runqueue_isrunning( + struct runqueue_s* rq, + struct re_s* entry +) +{ + struct re_s* e; + + LDAP_STAILQ_FOREACH( e, &rq->run_list, rnext ) { + if ( e == entry ) { + return 1; + } + } + return 0; +} + +void +ldap_pvt_runqueue_resched( + struct runqueue_s* rq, + struct re_s* entry, + int defer +) +{ + struct re_s* prev; + struct re_s* e; + + LDAP_STAILQ_FOREACH( e, &rq->task_list, tnext ) { + if ( e == entry ) + break; + } + + assert ( e == entry ); + + LDAP_STAILQ_REMOVE( &rq->task_list, entry, re_s, tnext ); + + if ( !defer ) { + entry->next_sched.tv_sec = time( NULL ) + entry->interval.tv_sec; + } else { + entry->next_sched.tv_sec = 0; + } + + if ( LDAP_STAILQ_EMPTY( &rq->task_list )) { + LDAP_STAILQ_INSERT_HEAD( &rq->task_list, entry, tnext ); + } else if ( entry->next_sched.tv_sec == 0 ) { + LDAP_STAILQ_INSERT_TAIL( &rq->task_list, entry, tnext ); + } else { + prev = NULL; + LDAP_STAILQ_FOREACH( e, &rq->task_list, tnext ) { + if ( e->next_sched.tv_sec == 0 ) { + if ( prev == NULL ) { + LDAP_STAILQ_INSERT_HEAD( &rq->task_list, entry, tnext ); + } else { + LDAP_STAILQ_INSERT_AFTER( &rq->task_list, prev, entry, tnext ); + } + return; + } else if ( e->next_sched.tv_sec > entry->next_sched.tv_sec ) { + if ( prev == NULL ) { + LDAP_STAILQ_INSERT_HEAD( &rq->task_list, entry, tnext ); + } else { + LDAP_STAILQ_INSERT_AFTER( &rq->task_list, prev, entry, tnext ); + } + return; + } + prev = e; + } + LDAP_STAILQ_INSERT_TAIL( &rq->task_list, entry, tnext ); + } +} + +int +ldap_pvt_runqueue_persistent_backload( + struct runqueue_s* rq +) +{ + struct re_s* e; + int count = 0; + + ldap_pvt_thread_mutex_lock( &rq->rq_mutex ); + if ( !LDAP_STAILQ_EMPTY( &rq->task_list )) { + LDAP_STAILQ_FOREACH( e, &rq->task_list, tnext ) { + if ( e->next_sched.tv_sec == 0 ) + count++; + } + } + ldap_pvt_thread_mutex_unlock( &rq->rq_mutex ); + return count; +} + diff --git a/libraries/libldap_r/thr_cthreads.c b/libraries/libldap_r/thr_cthreads.c new file mode 100644 index 0000000..6cc4789 --- /dev/null +++ b/libraries/libldap_r/thr_cthreads.c @@ -0,0 +1,180 @@ +/* thr_cthreads.c - wrapper for mach cthreads */ +/* $OpenLDAP$ */ +/* This work is part of OpenLDAP Software <http://www.openldap.org/>. + * + * Copyright 1998-2021 The OpenLDAP Foundation. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted only as authorized by the OpenLDAP + * Public License. + * + * A copy of this license is available in file LICENSE in the + * top-level directory of the distribution or, alternatively, at + * <http://www.OpenLDAP.org/license.html>. + */ +/* This work was initially developed by Luke Howard for inclusion + * in U-MICH LDAP 3.3. + */ + +#include "portable.h" + +#if defined( HAVE_MACH_CTHREADS ) +#include "ldap_pvt_thread.h" /* Get the thread interface */ +#define LDAP_THREAD_IMPLEMENTATION +#include "ldap_thr_debug.h" /* May rename the symbols defined below */ + +int +ldap_int_thread_initialize( void ) +{ + return 0; +} + +int +ldap_int_thread_destroy( void ) +{ + return 0; +} + +int +ldap_pvt_thread_create( ldap_pvt_thread_t * thread, + int detach, + void *(*start_routine)( void *), void *arg) +{ + *thread = cthread_fork( (cthread_fn_t) start_routine, arg); + return ( *thread == NULL ? -1 : 0 ); +} + +void +ldap_pvt_thread_exit( void *retval ) +{ + cthread_exit( (any_t) retval ); +} + +int +ldap_pvt_thread_join( ldap_pvt_thread_t thread, void **thread_return ) +{ + void *status; + status = (void *) cthread_join ( thread ); + if (thread_return != NULL) + { + *thread_return = status; + } + return 0; +} + +int +ldap_pvt_thread_kill( ldap_pvt_thread_t thread, int signo ) +{ + return 0; +} + +int +ldap_pvt_thread_yield( void ) +{ + cthread_yield(); + return 0; +} + +int +ldap_pvt_thread_cond_init( ldap_pvt_thread_cond_t *cond ) +{ + condition_init( cond ); + return( 0 ); +} + +int +ldap_pvt_thread_cond_destroy( ldap_pvt_thread_cond_t *cond ) +{ + condition_clear( cond ); + return( 0 ); +} + +int +ldap_pvt_thread_cond_signal( ldap_pvt_thread_cond_t *cond ) +{ + condition_signal( cond ); + return( 0 ); +} + +int +ldap_pvt_thread_cond_broadcast( ldap_pvt_thread_cond_t *cond ) +{ + condition_broadcast( cond ); + return( 0 ); +} + +int +ldap_pvt_thread_cond_wait( ldap_pvt_thread_cond_t *cond, + ldap_pvt_thread_mutex_t *mutex ) +{ + condition_wait( cond, mutex ); + return( 0 ); +} + +int +ldap_pvt_thread_mutex_init( ldap_pvt_thread_mutex_t *mutex ) +{ + mutex_init( mutex ); + mutex->name = NULL; + return ( 0 ); +} + +int +ldap_pvt_thread_mutex_destroy( ldap_pvt_thread_mutex_t *mutex ) +{ + mutex_clear( mutex ); + return ( 0 ); +} + +int +ldap_pvt_thread_mutex_lock( ldap_pvt_thread_mutex_t *mutex ) +{ + mutex_lock( mutex ); + return ( 0 ); +} + +int +ldap_pvt_thread_mutex_unlock( ldap_pvt_thread_mutex_t *mutex ) +{ + mutex_unlock( mutex ); + return ( 0 ); +} + +int +ldap_pvt_thread_mutex_trylock( ldap_pvt_thread_mutex_t *mutex ) +{ + return mutex_try_lock( mutex ); +} + +ldap_pvt_thread_t +ldap_pvt_thread_self( void ) +{ + return cthread_self(); +} + +int +ldap_pvt_thread_key_create( ldap_pvt_thread_key_t *key ) +{ + return cthread_keycreate( key ); +} + +int +ldap_pvt_thread_key_destroy( ldap_pvt_thread_key_t key ) +{ + return( 0 ); +} + +int +ldap_pvt_thread_key_setdata( ldap_pvt_thread_key_t key, void *data ) +{ + return cthread_setspecific( key, data ); +} + +int +ldap_pvt_thread_key_getdata( ldap_pvt_thread_key_t key, void **data ) +{ + return cthread_getspecific( key, data ); +} + +#endif /* HAVE_MACH_CTHREADS */ diff --git a/libraries/libldap_r/thr_debug.c b/libraries/libldap_r/thr_debug.c new file mode 100644 index 0000000..24ac74b --- /dev/null +++ b/libraries/libldap_r/thr_debug.c @@ -0,0 +1,1292 @@ +/* thr_debug.c - wrapper around the chosen thread wrapper, for debugging. */ +/* $OpenLDAP$ */ +/* This work is part of OpenLDAP Software <http://www.openldap.org/>. + * + * Copyright 2005-2021 The OpenLDAP Foundation. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted only as authorized by the OpenLDAP + * Public License. + * + * A copy of this license is available in file LICENSE in the + * top-level directory of the distribution or, alternatively, at + * <http://www.OpenLDAP.org/license.html>. + */ + +/* + * This package provides several types of thread operation debugging: + * + * - Check the results of operations on threads, mutexes, condition + * variables and read/write locks. Also check some thread pool + * operations, but not those for which failure can happen in normal + * slapd operation. + * + * - Wrap those types except threads and pools in structs with state + * information, and check that on all operations: + * + * + Check that the resources are initialized and are only used at + * their original address (i.e. not realloced or copied). + * + * + Check the owner (thread ID) on mutex operations. + * + * + Optionally allocate a reference to a byte of dummy memory. + * This lets malloc debuggers see some incorrect use as memory + * leaks, access to freed memory, etc. + * + * - Print an error message and by default abort() upon errors. + * + * - Print a count of leaked thread resources after cleanup. + * + * Compile-time (./configure) setup: Macros defined in CPPFLAGS. + * + * LDAP_THREAD_DEBUG or LDAP_THREAD_DEBUG=2 + * Enables debugging, but value & 2 turns off type wrapping. + * + * LDAP_UINTPTR_T=integer type to hold pointers, preferably unsigned. + * Used by dummy memory option "scramble". Default = unsigned long. + * + * LDAP_DEBUG_THREAD_NONE = initializer for a "no thread" thread ID. + * + * In addition, you may need to set up an implementation-specific way + * to enable whatever error checking your thread library provides. + * Currently only implemented for Posix threads (pthreads), where + * you may need to define LDAP_INT_THREAD_MUTEXATTR. The default + * is PTHREAD_MUTEX_ERRORCHECK, or PTHREAD_MUTEX_ERRORCHECK_NP for + * Linux threads. See pthread_mutexattr_settype(3). + * + * Run-time configuration: + * + * Memory debugging tools: + * Tools that report uninitialized memory accesses should disable + * such warnings about the function debug_already_initialized(). + * Alternatively, include "noreinit" (below) in $LDAP_THREAD_DEBUG. + * + * Environment variable $LDAP_THREAD_DEBUG: + * The variable may contain a comma- or space-separated option list. + * Options: + * off - Disable this package. (It still slows things down). + * tracethreads - Report create/join/exit/kill of threads. + * noabort - Do not abort() on errors. + * noerror - Do not report errors. Implies noabort. + * nocount - Do not report counts of unreleased resources. + * nosync - Disable tests that use synchronizaion and thus + * clearly affect thread scheduling: + * Implies nocount, and cancels threadID if that is set. + * Note that if you turn on tracethreads or malloc + * debugging, these also use library calls which may + * affect thread scheduling (fprintf and malloc). + * The following options do not apply if type wrapping is disabled: + * nomem - Do not check memory operations. + * Implies noreinit,noalloc. + * noreinit - Do not catch reinitialization of existing resources. + * (That test accesses uninitialized memory). + * threadID - Trace thread IDs. Currently mostly useless. + * Malloc debugging -- allocate dummy memory for initialized + * resources, so malloc debuggers will report them as memory leaks: + * noalloc - Default. Do not allocate dummy memory. + * alloc - Store a pointer to dummy memory. However, leak + * detectors might not catch unreleased resources in + * global variables. + * scramble - Store bitwise complement of dummy memory pointer. + * That never escapes memory leak detectors - + * but detection while the program is running will + * report active resources as leaks. Do not + * use this if a garbage collector is in use:-) + * adjptr - Point to end of dummy memory. + * Purify reports these as "potential leaks" (PLK). + * I have not checked other malloc debuggers. + */ + +#include "portable.h" + +#if defined( LDAP_THREAD_DEBUG ) + +#include <stdio.h> +#include <ac/errno.h> +#include <ac/stdlib.h> +#include <ac/string.h> + +#include "ldap_pvt_thread.h" /* Get the thread interface */ +#define LDAP_THREAD_IMPLEMENTATION +#define LDAP_THREAD_DEBUG_IMPLEMENTATION +#define LDAP_THREAD_RDWR_IMPLEMENTATION +#define LDAP_THREAD_POOL_IMPLEMENTATION +#include "ldap_thr_debug.h" /* Get the underlying implementation */ + +#ifndef LDAP_THREAD_DEBUG_WRAP +#undef LDAP_THREAD_DEBUG_THREAD_ID +#elif !defined LDAP_THREAD_DEBUG_THREAD_ID +#define LDAP_THREAD_DEBUG_THREAD_ID 1 +#endif + +/* Use native malloc - the OpenLDAP wrappers may defeat malloc debuggers */ +#undef malloc +#undef calloc +#undef realloc +#undef free + + +/* Options from environment variable $LDAP_THREAD_DEBUG */ +enum { Count_no = 0, Count_yes, Count_reported, Count_reported_more }; +static int count = Count_yes; +#ifdef LDAP_THREAD_DEBUG_WRAP +enum { Wrap_noalloc, Wrap_alloc, Wrap_scramble, Wrap_adjptr }; +static int wraptype = Wrap_noalloc, wrap_offset, unwrap_offset; +static int nomem, noreinit; +#endif +#if LDAP_THREAD_DEBUG_THREAD_ID +0 +static int threadID; +#else +enum { threadID = 0 }; +#endif +static int nodebug, noabort, noerror, nosync, tracethreads; +static int wrap_threads; +static int options_done; + + +/* ldap_pvt_thread_initialize() called, ldap_pvt_thread_destroy() not called */ +static int threading_enabled; + + +/* Resource counts */ +enum { + Idx_unexited_thread, Idx_unjoined_thread, Idx_locked_mutex, + Idx_mutex, Idx_cond, Idx_rdwr, Idx_tpool, Idx_max +}; +static int resource_counts[Idx_max]; +static const char *const resource_names[] = { + "unexited threads", "unjoined threads", "locked mutexes", + "mutexes", "conds", "rdwrs", "thread pools" +}; +static ldap_int_thread_mutex_t resource_mutexes[Idx_max]; + + +/* Hide pointers from malloc debuggers. */ +#define SCRAMBLE(ptr) (~(LDAP_UINTPTR_T) (ptr)) +#define UNSCRAMBLE_usagep(num) ((ldap_debug_usage_info_t *) ~(num)) +#define UNSCRAMBLE_dummyp(num) ((unsigned char *) ~(num)) + + +#define WARN(var, msg) (warn (__FILE__, __LINE__, (msg), #var, (var))) +#define WARN_IF(rc, msg) {if (rc) warn (__FILE__, __LINE__, (msg), #rc, (rc));} + +#define ERROR(var, msg) { \ + if (!noerror) { \ + errmsg(__FILE__, __LINE__, (msg), #var, (var)); \ + if( !noabort ) abort(); \ + } \ +} + +#define ERROR_IF(rc, msg) { \ + if (!noerror) { \ + int rc_ = (rc); \ + if (rc_) { \ + errmsg(__FILE__, __LINE__, (msg), #rc, rc_); \ + if( !noabort ) abort(); \ + } \ + } \ +} + +#ifdef LDAP_THREAD_DEBUG_WRAP +#define MEMERROR_IF(rc, msg, mem_act) { \ + if (!noerror) { \ + int rc_ = (rc); \ + if (rc_) { \ + errmsg(__FILE__, __LINE__, (msg), #rc, rc_); \ + if( wraptype != Wrap_noalloc ) { mem_act; } \ + if( !noabort ) abort(); \ + } \ + } \ +} +#endif /* LDAP_THREAD_DEBUG_WRAP */ + +#if 0 +static void +warn( const char *file, int line, const char *msg, const char *var, int val ) +{ + fprintf( stderr, + (strpbrk( var, "!=" ) + ? "%s:%d: %s warning: %s\n" + : "%s:%d: %s warning: %s is %d\n"), + file, line, msg, var, val ); +} +#endif + +static void +errmsg( const char *file, int line, const char *msg, const char *var, int val ) +{ + fprintf( stderr, + (strpbrk( var, "!=" ) + ? "%s:%d: %s error: %s\n" + : "%s:%d: %s error: %s is %d\n"), + file, line, msg, var, val ); +} + +static void +count_resource_leaks( void ) +{ + int i, j; + char errbuf[200]; + if( count == Count_yes ) { + count = Count_reported; +#if 0 /* Could break if there are still threads after atexit */ + for( i = j = 0; i < Idx_max; i++ ) + j |= ldap_int_thread_mutex_destroy( &resource_mutexes[i] ); + WARN_IF( j, "ldap_debug_thread_destroy:mutexes" ); +#endif + for( i = j = 0; i < Idx_max; i++ ) + if( resource_counts[i] ) + j += sprintf( errbuf + j, ", %d %s", + resource_counts[i], resource_names[i] ); + if( j ) + fprintf( stderr, "== thr_debug: Leaked%s. ==\n", errbuf + 1 ); + } +} + +static void +get_options( void ) +{ + static const struct option_info_s { + const char *name; + int *var, val; + } option_info[] = { + { "off", &nodebug, 1 }, + { "noabort", &noabort, 1 }, + { "noerror", &noerror, 1 }, + { "nocount", &count, Count_no }, + { "nosync", &nosync, 1 }, +#if LDAP_THREAD_DEBUG_THREAD_ID +0 + { "threadID", &threadID, 1 }, +#endif +#ifdef LDAP_THREAD_DEBUG_WRAP + { "nomem", &nomem, 1 }, + { "noreinit", &noreinit, 1 }, + { "noalloc", &wraptype, Wrap_noalloc }, + { "alloc", &wraptype, Wrap_alloc }, + { "adjptr", &wraptype, Wrap_adjptr }, + { "scramble", &wraptype, Wrap_scramble }, +#endif + { "tracethreads", &tracethreads, 1 }, + { NULL, NULL, 0 } + }; + const char *s = getenv( "LDAP_THREAD_DEBUG" ); + if( s != NULL ) { + while( *(s += strspn( s, ", \t\r\n" )) != '\0' ) { + size_t optlen = strcspn( s, ", \t\r\n" ); + const struct option_info_s *oi = option_info; + while( oi->name && + (strncasecmp( oi->name, s, optlen ) || oi->name[optlen]) ) + oi++; + if( oi->name ) + *oi->var = oi->val; + else + fprintf( stderr, + "== thr_debug: Unknown $%s option '%.*s' ==\n", + "LDAP_THREAD_DEBUG", (int) optlen, s ); + s += optlen; + } + } + if( nodebug ) { + tracethreads = 0; + nosync = noerror = 1; + } + if( nosync ) + count = Count_no; + if( noerror ) + noabort = 1; +#if LDAP_THREAD_DEBUG_THREAD_ID +0 + if( nosync ) + threadID = 0; +#endif +#ifdef LDAP_THREAD_DEBUG_WRAP + if( noerror ) + nomem = 1; + if( !nomem ) { + static const ldap_debug_usage_info_t usage; + if( sizeof(LDAP_UINTPTR_T) < sizeof(unsigned char *) + || sizeof(LDAP_UINTPTR_T) < sizeof(ldap_debug_usage_info_t *) + || UNSCRAMBLE_usagep( SCRAMBLE( &usage ) ) != &usage + || UNSCRAMBLE_dummyp( SCRAMBLE( (unsigned char *) 0 ) ) ) + { + fputs( "== thr_debug: Memory checks unsupported, " + "adding nomem to $LDAP_THREAD_DEBUG ==\n", stderr ); + nomem = 1; + } + } + if( nomem ) { + noreinit = 1; + wraptype = Wrap_noalloc; + } + unwrap_offset = -(wrap_offset = (wraptype == Wrap_adjptr)); +#endif + wrap_threads = (tracethreads || threadID || count); + options_done = 1; +} + + +#ifndef LDAP_THREAD_DEBUG_WRAP + +#define WRAPPED(ptr) (ptr) +#define GET_OWNER(ptr) 0 +#define SET_OWNER(ptr, thread) ((void) 0) +#define RESET_OWNER(ptr) ((void) 0) +#define ASSERT_OWNER(ptr, msg) ((void) 0) +#define ASSERT_NO_OWNER(ptr, msg) ((void) 0) + +#define init_usage(ptr, msg) ((void) 0) +#define check_usage(ptr, msg) ((void) 0) +#define destroy_usage(ptr) ((void) 0) + +#else /* LDAP_THREAD_DEBUG_WRAP */ + +/* Specialize this if the initializer is not appropriate. */ +/* The ASSERT_NO_OWNER() definition may also need an override. */ +#ifndef LDAP_DEBUG_THREAD_NONE +#define LDAP_DEBUG_THREAD_NONE { -1 } /* "no thread" ldap_int_thread_t value */ +#endif + +static const ldap_int_thread_t ldap_debug_thread_none = LDAP_DEBUG_THREAD_NONE; + +#define THREAD_MUTEX_OWNER(mutex) \ + ldap_int_thread_equal( (mutex)->owner, ldap_int_thread_self() ) + +void +ldap_debug_thread_assert_mutex_owner( + const char *file, + int line, + const char *msg, + ldap_pvt_thread_mutex_t *mutex ) +{ + if( !(noerror || THREAD_MUTEX_OWNER( mutex )) ) { + errmsg( file, line, msg, "ASSERT_MUTEX_OWNER", 0 ); + if( !noabort ) abort(); + } +} + +#define WRAPPED(ptr) (&(ptr)->wrapped) +#define GET_OWNER(ptr) ((ptr)->owner) +#define SET_OWNER(ptr, thread) ((ptr)->owner = (thread)) +#define RESET_OWNER(ptr) ((ptr)->owner = ldap_debug_thread_none) +#define ASSERT_OWNER(ptr, msg) ERROR_IF( !THREAD_MUTEX_OWNER( ptr ), msg ) +#ifndef ASSERT_NO_OWNER +#define ASSERT_NO_OWNER(ptr, msg) ERROR_IF( \ + !ldap_int_thread_equal( (ptr)->owner, ldap_debug_thread_none ), msg ) +#endif + +/* Try to provoke memory access error (for malloc debuggers) */ +#define PEEK(mem) {if (-*(volatile const unsigned char *)(mem)) debug_noop();} + +static void debug_noop( void ); +static int debug_already_initialized( const ldap_debug_usage_info_t *usage ); + +/* Name used for clearer error message */ +#define IS_COPY_OR_MOVED(usage) ((usage)->self != SCRAMBLE( usage )) + +#define DUMMY_ADDR(usage) \ + (wraptype == Wrap_scramble \ + ? UNSCRAMBLE_dummyp( (usage)->mem.num ) \ + : (usage)->mem.ptr + unwrap_offset) + +/* Mark resource as initialized */ +static void +init_usage( ldap_debug_usage_info_t *usage, const char *msg ) +{ + if( !options_done ) + get_options(); + if( !nomem ) { + if( !noreinit ) { + MEMERROR_IF( debug_already_initialized( usage ), msg, { + /* Provoke malloc debuggers */ + unsigned char *dummy = DUMMY_ADDR( usage ); + PEEK( dummy ); + free( dummy ); + free( dummy ); + } ); + } + if( wraptype != Wrap_noalloc ) { + unsigned char *dummy = malloc( 1 ); + assert( dummy != NULL ); + if( wraptype == Wrap_scramble ) { + usage->mem.num = SCRAMBLE( dummy ); + /* Verify that ptr<->integer casts work on this host */ + assert( UNSCRAMBLE_dummyp( usage->mem.num ) == dummy ); + } else { + usage->mem.ptr = dummy + wrap_offset; + } + } + } else { + /* Unused, but set for readability in debugger */ + usage->mem.ptr = NULL; + } + usage->self = SCRAMBLE( usage ); /* If nomem, only for debugger */ + usage->magic = ldap_debug_magic; + usage->state = ldap_debug_state_inited; +} + +/* Check that resource is initialized and not copied/realloced */ +static void +check_usage( const ldap_debug_usage_info_t *usage, const char *msg ) +{ + enum { Is_destroyed = 1 }; /* Name used for clearer error message */ + + if( usage->magic != ldap_debug_magic ) { + ERROR( usage->magic, msg ); + return; + } + switch( usage->state ) { + case ldap_debug_state_destroyed: + MEMERROR_IF( Is_destroyed, msg, { + PEEK( DUMMY_ADDR( usage ) ); + } ); + break; + default: + ERROR( usage->state, msg ); + break; + case ldap_debug_state_inited: + if( !nomem ) { + MEMERROR_IF( IS_COPY_OR_MOVED( usage ), msg, { + PEEK( DUMMY_ADDR( usage ) ); + PEEK( UNSCRAMBLE_usagep( usage->self ) ); + } ); + } + break; + } +} + +/* Mark resource as destroyed. */ +/* Does not check for errors, call check_usage()/init_usage() first. */ +static void +destroy_usage( ldap_debug_usage_info_t *usage ) +{ + if( usage->state == ldap_debug_state_inited ) { + if( wraptype != Wrap_noalloc ) { + free( DUMMY_ADDR( usage ) ); + /* Do not reset the DUMMY_ADDR, leave it for malloc debuggers + * in case the resource is used after it is freed. */ + } + usage->state = ldap_debug_state_destroyed; + } +} + +/* Define these after they are used, so they are hopefully not inlined */ + +static void +debug_noop( void ) +{ +} + +/* + * Valid programs access uninitialized memory here unless "noreinit". + * + * Returns true if the resource is initialized and not copied/realloced. + */ +LDAP_GCCATTR((noinline)) +static int +debug_already_initialized( const ldap_debug_usage_info_t *usage ) +{ + /* + * 'ret' keeps the Valgrind warning "Conditional jump or move + * depends on uninitialised value(s)" _inside_ this function. + */ + volatile int ret = 0; + if( usage->state == ldap_debug_state_inited ) + if( !IS_COPY_OR_MOVED( usage ) ) + if( usage->magic == ldap_debug_magic ) + ret = 1; + return ret; +} + +#endif /* LDAP_THREAD_DEBUG_WRAP */ + + +#if !(LDAP_THREAD_DEBUG_THREAD_ID +0) + +typedef void ldap_debug_thread_t; +#define init_thread_info() {} +#define with_thread_info_lock(statements) { statements; } +#define thread_info_detached(t) 0 +#define add_thread_info(msg, thr, det) ((void) 0) +#define remove_thread_info(tinfo, msg) ((void) 0) +#define get_thread_info(thread, msg) NULL + +#else /* LDAP_THREAD_DEBUG_THREAD_ID */ + +/* + * Thread ID tracking. Currently acieves little. + * Should be either expanded or deleted. + */ + +/* + * Array of threads. Used instead of making ldap_pvt_thread_t a wrapper + * around ldap_int_thread_t, which would slow down ldap_pvt_thread_self(). + */ +typedef struct { + ldap_pvt_thread_t wrapped; + ldap_debug_usage_info_t usage; + int detached; + int idx; +} ldap_debug_thread_t; + +static ldap_debug_thread_t **thread_info; +static unsigned int thread_info_size, thread_info_used; +static ldap_int_thread_mutex_t thread_info_mutex; + +#define init_thread_info() { \ + if( threadID ) { \ + int mutex_init_rc = ldap_int_thread_mutex_init( &thread_info_mutex ); \ + assert( mutex_init_rc == 0 ); \ + } \ +} + +#define with_thread_info_lock(statements) { \ + int rc_wtl_ = ldap_int_thread_mutex_lock( &thread_info_mutex ); \ + assert( rc_wtl_ == 0 ); \ + { statements; } \ + rc_wtl_ = ldap_int_thread_mutex_unlock( &thread_info_mutex ); \ + assert( rc_wtl_ == 0 ); \ +} + +#define thread_info_detached(t) ((t)->detached) + +static void +add_thread_info( + const char *msg, + const ldap_pvt_thread_t *thread, + int detached ) +{ + ldap_debug_thread_t *t; + + if( thread_info_used >= thread_info_size ) { + unsigned int more = thread_info_size + 8; + unsigned int new_size = thread_info_size + more; + + t = calloc( more, sizeof(ldap_debug_thread_t) ); + assert( t != NULL ); + thread_info = realloc( thread_info, new_size * sizeof(*thread_info) ); + assert( thread_info != NULL ); + do { + t->idx = thread_info_size; + thread_info[thread_info_size++] = t++; + } while( thread_info_size < new_size ); + } + + t = thread_info[thread_info_used]; + init_usage( &t->usage, msg ); + t->wrapped = *thread; + t->detached = detached; + thread_info_used++; +} + +static void +remove_thread_info( ldap_debug_thread_t *t, const char *msg ) +{ + ldap_debug_thread_t *last; + int idx; + check_usage( &t->usage, msg ); + destroy_usage( &t->usage ); + idx = t->idx; + assert( thread_info[idx] == t ); + last = thread_info[--thread_info_used]; + assert( last->idx == thread_info_used ); + (thread_info[idx] = last)->idx = idx; + (thread_info[thread_info_used] = t )->idx = thread_info_used; +} + +static ldap_debug_thread_t * +get_thread_info( ldap_pvt_thread_t thread, const char *msg ) +{ + unsigned int i; + ldap_debug_thread_t *t; + for( i = 0; i < thread_info_used; i++ ) { + if( ldap_pvt_thread_equal( thread, thread_info[i]->wrapped ) ) + break; + } + ERROR_IF( i == thread_info_used, msg ); + t = thread_info[i]; + check_usage( &t->usage, msg ); + return t; +} + +#endif /* LDAP_THREAD_DEBUG_THREAD_ID */ + + +static char * +thread_name( char *buf, int bufsize, ldap_pvt_thread_t thread ) +{ + int i; + --bufsize; + if( bufsize > 2*sizeof(thread) ) + bufsize = 2*sizeof(thread); + for( i = 0; i < bufsize; i += 2 ) + snprintf( buf+i, 3, "%02x", ((unsigned char *)&thread)[i/2] ); + return buf; +} + + +/* Add <adjust> (+/-1) to resource count <which> unless "nocount". */ +static void +adjust_count( int which, int adjust ) +{ + int rc; + switch( count ) { + case Count_no: + break; + case Count_yes: + rc = ldap_int_thread_mutex_lock( &resource_mutexes[which] ); + assert( rc == 0 ); + resource_counts[which] += adjust; + rc = ldap_int_thread_mutex_unlock( &resource_mutexes[which] ); + assert( rc == 0 ); + break; + case Count_reported: + fputs( "== thr_debug: More thread activity after exit ==\n", stderr ); + count = Count_reported_more; + /* FALL THROUGH */ + case Count_reported_more: + /* Not used, but result might be inspected with debugger */ + /* (Hopefully threading is disabled by now...) */ + resource_counts[which] += adjust; + break; + } +} + + +/* Wrappers for LDAP_THREAD_IMPLEMENTATION: */ + +/* Used instead of ldap_int_thread_initialize by ldap_pvt_thread_initialize */ +int +ldap_debug_thread_initialize( void ) +{ + int i, rc, rc2; + if( !options_done ) + get_options(); + ERROR_IF( threading_enabled, "ldap_debug_thread_initialize" ); + threading_enabled = 1; + rc = ldap_int_thread_initialize(); + if( rc ) { + ERROR( rc, "ldap_debug_thread_initialize:threads" ); + threading_enabled = 0; + } else { + init_thread_info(); + if( count != Count_no ) { + for( i = rc2 = 0; i < Idx_max; i++ ) + rc2 |= ldap_int_thread_mutex_init( &resource_mutexes[i] ); + assert( rc2 == 0 ); + /* FIXME: Only for static libldap_r as in init.c? If so, why? */ + atexit( count_resource_leaks ); + } + } + return rc; +} + +/* Used instead of ldap_int_thread_destroy by ldap_pvt_thread_destroy */ +int +ldap_debug_thread_destroy( void ) +{ + int rc; + ERROR_IF( !threading_enabled, "ldap_debug_thread_destroy" ); + /* sleep(1) -- need to wait for thread pool to finish? */ + rc = ldap_int_thread_destroy(); + if( rc ) { + ERROR( rc, "ldap_debug_thread_destroy:threads" ); + } else { + threading_enabled = 0; + } + return rc; +} + +int +ldap_pvt_thread_set_concurrency( int n ) +{ + int rc; + ERROR_IF( !threading_enabled, "ldap_pvt_thread_set_concurrency" ); + rc = ldap_int_thread_set_concurrency( n ); + ERROR_IF( rc, "ldap_pvt_thread_set_concurrency" ); + return rc; +} + +int +ldap_pvt_thread_get_concurrency( void ) +{ + int rc; + ERROR_IF( !threading_enabled, "ldap_pvt_thread_get_concurrency" ); + rc = ldap_int_thread_get_concurrency(); + ERROR_IF( rc, "ldap_pvt_thread_get_concurrency" ); + return rc; +} + +unsigned int +ldap_pvt_thread_sleep( unsigned int interval ) +{ + int rc; + ERROR_IF( !threading_enabled, "ldap_pvt_thread_sleep" ); + rc = ldap_int_thread_sleep( interval ); + ERROR_IF( rc, "ldap_pvt_thread_sleep" ); + return 0; +} + +static void +thread_exiting( const char *how, const char *msg ) +{ + ldap_pvt_thread_t thread; +#if 0 /* Detached threads may exit after ldap_debug_thread_destroy(). */ + ERROR_IF( !threading_enabled, msg ); +#endif + thread = ldap_pvt_thread_self(); + if( tracethreads ) { + char buf[40]; + fprintf( stderr, "== thr_debug: %s thread %s ==\n", + how, thread_name( buf, sizeof(buf), thread ) ); + } + if( threadID ) { + with_thread_info_lock({ + ldap_debug_thread_t *t = get_thread_info( thread, msg ); + if( thread_info_detached( t ) ) + remove_thread_info( t, msg ); + }); + } + adjust_count( Idx_unexited_thread, -1 ); +} + +void +ldap_pvt_thread_exit( void *retval ) +{ + thread_exiting( "Exiting", "ldap_pvt_thread_exit" ); + ldap_int_thread_exit( retval ); +} + +typedef struct { + void *(*start_routine)( void * ); + void *arg; +} ldap_debug_thread_call_t; + +static void * +ldap_debug_thread_wrapper( void *arg ) +{ + void *ret; + ldap_debug_thread_call_t call = *(ldap_debug_thread_call_t *)arg; + free( arg ); + ret = call.start_routine( call.arg ); + thread_exiting( "Returning from", "ldap_debug_thread_wrapper" ); + return ret; +} + +int +ldap_pvt_thread_create( + ldap_pvt_thread_t *thread, + int detach, + void *(*start_routine)( void * ), + void *arg ) +{ + int rc; + if( !options_done ) + get_options(); + ERROR_IF( !threading_enabled, "ldap_pvt_thread_create" ); + + if( wrap_threads ) { + ldap_debug_thread_call_t *call = malloc( + sizeof( ldap_debug_thread_call_t ) ); + assert( call != NULL ); + call->start_routine = start_routine; + call->arg = arg; + start_routine = ldap_debug_thread_wrapper; + arg = call; + } + if( threadID ) { + with_thread_info_lock({ + rc = ldap_int_thread_create( thread, detach, start_routine, arg ); + if( rc == 0 ) + add_thread_info( "ldap_pvt_thread_create", thread, detach ); + }); + } else { + rc = ldap_int_thread_create( thread, detach, start_routine, arg ); + } + if( rc ) { + ERROR( rc, "ldap_pvt_thread_create" ); + if( wrap_threads ) + free( arg ); + } else { + if( tracethreads ) { + char buf[40], buf2[40]; + fprintf( stderr, + "== thr_debug: Created thread %s%s from thread %s ==\n", + thread_name( buf, sizeof(buf), *thread ), + detach ? " (detached)" : "", + thread_name( buf2, sizeof(buf2), ldap_pvt_thread_self() ) ); + } + adjust_count( Idx_unexited_thread, +1 ); + if( !detach ) + adjust_count( Idx_unjoined_thread, +1 ); + } + return rc; +} + +int +ldap_pvt_thread_join( ldap_pvt_thread_t thread, void **thread_return ) +{ + int rc; + ldap_debug_thread_t *t = NULL; + ERROR_IF( !threading_enabled, "ldap_pvt_thread_join" ); + if( tracethreads ) { + char buf[40], buf2[40]; + fprintf( stderr, "== thr_debug: Joining thread %s in thread %s ==\n", + thread_name( buf, sizeof(buf), thread ), + thread_name( buf2, sizeof(buf2), ldap_pvt_thread_self() ) ); + } + if( threadID ) + with_thread_info_lock( { + t = get_thread_info( thread, "ldap_pvt_thread_join" ); + ERROR_IF( thread_info_detached( t ), "ldap_pvt_thread_join" ); + } ); + rc = ldap_int_thread_join( thread, thread_return ); + if( rc ) { + ERROR( rc, "ldap_pvt_thread_join" ); + } else { + if( threadID ) + with_thread_info_lock( + remove_thread_info( t, "ldap_pvt_thread_join" ) ); + adjust_count( Idx_unjoined_thread, -1 ); + } + + return rc; +} + +int +ldap_pvt_thread_kill( ldap_pvt_thread_t thread, int signo ) +{ + int rc; + ERROR_IF( !threading_enabled, "ldap_pvt_thread_kill" ); + if( tracethreads ) { + char buf[40], buf2[40]; + fprintf( stderr, + "== thr_debug: Killing thread %s (sig %i) from thread %s ==\n", + thread_name( buf, sizeof(buf), thread ), signo, + thread_name( buf2, sizeof(buf2), ldap_pvt_thread_self() ) ); + } + rc = ldap_int_thread_kill( thread, signo ); + ERROR_IF( rc, "ldap_pvt_thread_kill" ); + return rc; +} + +int +ldap_pvt_thread_yield( void ) +{ + int rc; + ERROR_IF( !threading_enabled, "ldap_pvt_thread_yield" ); + rc = ldap_int_thread_yield(); + ERROR_IF( rc, "ldap_pvt_thread_yield" ); + return rc; +} + +ldap_pvt_thread_t +ldap_pvt_thread_self( void ) +{ +#if 0 /* Function is used by ch_free() via slap_sl_contxt() in slapd */ + ERROR_IF( !threading_enabled, "ldap_pvt_thread_self" ); +#endif + return ldap_int_thread_self(); +} + +int +ldap_pvt_thread_cond_init( ldap_pvt_thread_cond_t *cond ) +{ + int rc; + init_usage( &cond->usage, "ldap_pvt_thread_cond_init" ); + rc = ldap_int_thread_cond_init( WRAPPED( cond ) ); + if( rc ) { + ERROR( rc, "ldap_pvt_thread_cond_init" ); + destroy_usage( &cond->usage ); + } else { + adjust_count( Idx_cond, +1 ); + } + return rc; +} + +int +ldap_pvt_thread_cond_destroy( ldap_pvt_thread_cond_t *cond ) +{ + int rc; + check_usage( &cond->usage, "ldap_pvt_thread_cond_destroy" ); + rc = ldap_int_thread_cond_destroy( WRAPPED( cond ) ); + if( rc ) { + ERROR( rc, "ldap_pvt_thread_cond_destroy" ); + } else { + destroy_usage( &cond->usage ); + adjust_count( Idx_cond, -1 ); + } + return rc; +} + +int +ldap_pvt_thread_cond_signal( ldap_pvt_thread_cond_t *cond ) +{ + int rc; + check_usage( &cond->usage, "ldap_pvt_thread_cond_signal" ); + rc = ldap_int_thread_cond_signal( WRAPPED( cond ) ); + ERROR_IF( rc, "ldap_pvt_thread_cond_signal" ); + return rc; +} + +int +ldap_pvt_thread_cond_broadcast( ldap_pvt_thread_cond_t *cond ) +{ + int rc; + check_usage( &cond->usage, "ldap_pvt_thread_cond_broadcast" ); + rc = ldap_int_thread_cond_broadcast( WRAPPED( cond ) ); + ERROR_IF( rc, "ldap_pvt_thread_cond_broadcast" ); + return rc; +} + +int +ldap_pvt_thread_cond_wait( + ldap_pvt_thread_cond_t *cond, + ldap_pvt_thread_mutex_t *mutex ) +{ + int rc; + ldap_int_thread_t owner; + check_usage( &cond->usage, "ldap_pvt_thread_cond_wait:cond" ); + check_usage( &mutex->usage, "ldap_pvt_thread_cond_wait:mutex" ); + adjust_count( Idx_locked_mutex, -1 ); + owner = GET_OWNER( mutex ); + ASSERT_OWNER( mutex, "ldap_pvt_thread_cond_wait" ); + RESET_OWNER( mutex ); + rc = ldap_int_thread_cond_wait( WRAPPED( cond ), WRAPPED( mutex ) ); + ASSERT_NO_OWNER( mutex, "ldap_pvt_thread_cond_wait" ); + SET_OWNER( mutex, rc ? owner : ldap_int_thread_self() ); + adjust_count( Idx_locked_mutex, +1 ); + ERROR_IF( rc, "ldap_pvt_thread_cond_wait" ); + return rc; +} + +int +ldap_pvt_thread_mutex_init( ldap_pvt_thread_mutex_t *mutex ) +{ + int rc; + init_usage( &mutex->usage, "ldap_pvt_thread_mutex_init" ); + rc = ldap_int_thread_mutex_init( WRAPPED( mutex ) ); + if( rc ) { + ERROR( rc, "ldap_pvt_thread_mutex_init" ); + destroy_usage( &mutex->usage ); + } else { + RESET_OWNER( mutex ); + adjust_count( Idx_mutex, +1 ); + } + return rc; +} + +int +ldap_pvt_thread_mutex_destroy( ldap_pvt_thread_mutex_t *mutex ) +{ + int rc; + check_usage( &mutex->usage, "ldap_pvt_thread_mutex_destroy" ); + ASSERT_NO_OWNER( mutex, "ldap_pvt_thread_mutex_destroy" ); + rc = ldap_int_thread_mutex_destroy( WRAPPED( mutex ) ); + if( rc ) { + ERROR( rc, "ldap_pvt_thread_mutex_destroy" ); + } else { + destroy_usage( &mutex->usage ); + RESET_OWNER( mutex ); + adjust_count( Idx_mutex, -1 ); + } + return rc; +} + +int +ldap_pvt_thread_mutex_lock( ldap_pvt_thread_mutex_t *mutex ) +{ + int rc; + check_usage( &mutex->usage, "ldap_pvt_thread_mutex_lock" ); + rc = ldap_int_thread_mutex_lock( WRAPPED( mutex ) ); + if( rc ) { + ERROR_IF( rc, "ldap_pvt_thread_mutex_lock" ); + } else { + ASSERT_NO_OWNER( mutex, "ldap_pvt_thread_mutex_lock" ); + SET_OWNER( mutex, ldap_int_thread_self() ); + adjust_count( Idx_locked_mutex, +1 ); + } + return rc; +} + +int +ldap_pvt_thread_mutex_trylock( ldap_pvt_thread_mutex_t *mutex ) +{ + int rc; + check_usage( &mutex->usage, "ldap_pvt_thread_mutex_trylock" ); + rc = ldap_int_thread_mutex_trylock( WRAPPED( mutex ) ); + if( rc == 0 ) { + ASSERT_NO_OWNER( mutex, "ldap_pvt_thread_mutex_trylock" ); + SET_OWNER( mutex, ldap_int_thread_self() ); + adjust_count( Idx_locked_mutex, +1 ); + } + return rc; +} + +int +ldap_pvt_thread_mutex_unlock( ldap_pvt_thread_mutex_t *mutex ) +{ + int rc; + check_usage( &mutex->usage, "ldap_pvt_thread_mutex_unlock" ); + ASSERT_OWNER( mutex, "ldap_pvt_thread_mutex_unlock" ); + RESET_OWNER( mutex ); /* Breaks if this thread did not own the mutex */ + rc = ldap_int_thread_mutex_unlock( WRAPPED( mutex ) ); + if( rc ) { + ERROR_IF( rc, "ldap_pvt_thread_mutex_unlock" ); + } else { + adjust_count( Idx_locked_mutex, -1 ); + } + return rc; +} + + +/* Wrappers for LDAP_THREAD_RDWR_IMPLEMENTATION: */ + +int +ldap_pvt_thread_rdwr_init( ldap_pvt_thread_rdwr_t *rwlock ) +{ + int rc; + init_usage( &rwlock->usage, "ldap_pvt_thread_rdwr_init" ); + rc = ldap_int_thread_rdwr_init( WRAPPED( rwlock ) ); + if( rc ) { + ERROR( rc, "ldap_pvt_thread_rdwr_init" ); + destroy_usage( &rwlock->usage ); + } else { + adjust_count( Idx_rdwr, +1 ); + } + return rc; +} + +int +ldap_pvt_thread_rdwr_destroy( ldap_pvt_thread_rdwr_t *rwlock ) +{ + int rc; + check_usage( &rwlock->usage, "ldap_pvt_thread_rdwr_destroy" ); + rc = ldap_int_thread_rdwr_destroy( WRAPPED( rwlock ) ); + if( rc ) { + ERROR( rc, "ldap_pvt_thread_rdwr_destroy" ); + } else { + destroy_usage( &rwlock->usage ); + adjust_count( Idx_rdwr, -1 ); + } + return rc; +} + +int +ldap_pvt_thread_rdwr_rlock( ldap_pvt_thread_rdwr_t *rwlock ) +{ + int rc; + check_usage( &rwlock->usage, "ldap_pvt_thread_rdwr_rlock" ); + rc = ldap_int_thread_rdwr_rlock( WRAPPED( rwlock ) ); + ERROR_IF( rc, "ldap_pvt_thread_rdwr_rlock" ); + return rc; +} + +int +ldap_pvt_thread_rdwr_rtrylock( ldap_pvt_thread_rdwr_t *rwlock ) +{ + check_usage( &rwlock->usage, "ldap_pvt_thread_rdwr_rtrylock" ); + return ldap_int_thread_rdwr_rtrylock( WRAPPED( rwlock ) ); +} + +int +ldap_pvt_thread_rdwr_runlock( ldap_pvt_thread_rdwr_t *rwlock ) +{ + int rc; + check_usage( &rwlock->usage, "ldap_pvt_thread_rdwr_runlock" ); + rc = ldap_int_thread_rdwr_runlock( WRAPPED( rwlock ) ); + ERROR_IF( rc, "ldap_pvt_thread_rdwr_runlock" ); + return rc; +} + +int +ldap_pvt_thread_rdwr_wlock( ldap_pvt_thread_rdwr_t *rwlock ) +{ + int rc; + check_usage( &rwlock->usage, "ldap_pvt_thread_rdwr_wlock" ); + rc = ldap_int_thread_rdwr_wlock( WRAPPED( rwlock ) ); + ERROR_IF( rc, "ldap_pvt_thread_rdwr_wlock" ); + return rc; +} + +int +ldap_pvt_thread_rdwr_wtrylock( ldap_pvt_thread_rdwr_t *rwlock ) +{ + check_usage( &rwlock->usage, "ldap_pvt_thread_rdwr_wtrylock" ); + return ldap_int_thread_rdwr_wtrylock( WRAPPED( rwlock ) ); +} + +int +ldap_pvt_thread_rdwr_wunlock( ldap_pvt_thread_rdwr_t *rwlock ) +{ + int rc; + check_usage( &rwlock->usage, "ldap_pvt_thread_rdwr_wunlock" ); + rc = ldap_int_thread_rdwr_wunlock( WRAPPED( rwlock ) ); + ERROR_IF( rc, "ldap_pvt_thread_rdwr_wunlock" ); + return rc; +} + +#if defined(LDAP_RDWR_DEBUG) && !defined(LDAP_THREAD_HAVE_RDWR) + +int +ldap_pvt_thread_rdwr_readers( ldap_pvt_thread_rdwr_t *rwlock ) +{ + check_usage( &rwlock->usage, "ldap_pvt_thread_rdwr_readers" ); + return ldap_int_thread_rdwr_readers( WRAPPED( rwlock ) ); +} + +int +ldap_pvt_thread_rdwr_writers( ldap_pvt_thread_rdwr_t *rwlock ) +{ + check_usage( &rwlock->usage, "ldap_pvt_thread_rdwr_writers" ); + return ldap_int_thread_rdwr_writers( WRAPPED( rwlock ) ); +} + +int +ldap_pvt_thread_rdwr_active( ldap_pvt_thread_rdwr_t *rwlock ) +{ + check_usage( &rwlock->usage, "ldap_pvt_thread_rdwr_active" ); + return ldap_int_thread_rdwr_active( WRAPPED( rwlock ) ); +} + +#endif /* LDAP_RDWR_DEBUG && !LDAP_THREAD_HAVE_RDWR */ + + +/* Some wrappers for LDAP_THREAD_POOL_IMPLEMENTATION: */ +#ifdef LDAP_THREAD_POOL_IMPLEMENTATION + +int +ldap_pvt_thread_pool_init( + ldap_pvt_thread_pool_t *tpool, + int max_threads, + int max_pending ) +{ + int rc; + if( !options_done ) + get_options(); + ERROR_IF( !threading_enabled, "ldap_pvt_thread_pool_init" ); + rc = ldap_int_thread_pool_init( tpool, max_threads, max_pending ); + if( rc ) { + ERROR( rc, "ldap_pvt_thread_pool_init" ); + } else { + adjust_count( Idx_tpool, +1 ); + } + return rc; +} + +int +ldap_pvt_thread_pool_submit( + ldap_pvt_thread_pool_t *tpool, + ldap_pvt_thread_start_t *start_routine, void *arg ) +{ + int rc, has_pool; + ERROR_IF( !threading_enabled, "ldap_pvt_thread_pool_submit" ); + has_pool = (tpool && *tpool); + rc = ldap_int_thread_pool_submit( tpool, start_routine, arg ); + if( has_pool ) + ERROR_IF( rc, "ldap_pvt_thread_pool_submit" ); + return rc; +} + +int +ldap_pvt_thread_pool_maxthreads( + ldap_pvt_thread_pool_t *tpool, + int max_threads ) +{ + ERROR_IF( !threading_enabled, "ldap_pvt_thread_pool_maxthreads" ); + return ldap_int_thread_pool_maxthreads( tpool, max_threads ); +} + +int +ldap_pvt_thread_pool_backload( ldap_pvt_thread_pool_t *tpool ) +{ + ERROR_IF( !threading_enabled, "ldap_pvt_thread_pool_backload" ); + return ldap_int_thread_pool_backload( tpool ); +} + +int +ldap_pvt_thread_pool_destroy( ldap_pvt_thread_pool_t *tpool, int run_pending ) +{ + int rc, has_pool; + ERROR_IF( !threading_enabled, "ldap_pvt_thread_pool_destroy" ); + has_pool = (tpool && *tpool); + rc = ldap_int_thread_pool_destroy( tpool, run_pending ); + if( has_pool ) { + if( rc ) { + ERROR( rc, "ldap_pvt_thread_pool_destroy" ); + } else { + adjust_count( Idx_tpool, -1 ); + } + } + return rc; +} + +int +ldap_pvt_thread_pool_pause( ldap_pvt_thread_pool_t *tpool ) +{ + ERROR_IF( !threading_enabled, "ldap_pvt_thread_pool_pause" ); + return ldap_int_thread_pool_pause( tpool ); +} + +int +ldap_pvt_thread_pool_resume( ldap_pvt_thread_pool_t *tpool ) +{ + ERROR_IF( !threading_enabled, "ldap_pvt_thread_pool_resume" ); + return ldap_int_thread_pool_resume( tpool ); +} + +int +ldap_pvt_thread_pool_getkey( + void *xctx, + void *key, + void **data, + ldap_pvt_thread_pool_keyfree_t **kfree ) +{ +#if 0 /* Function is used by ch_free() via slap_sl_contxt() in slapd */ + ERROR_IF( !threading_enabled, "ldap_pvt_thread_pool_getkey" ); +#endif + return ldap_int_thread_pool_getkey( xctx, key, data, kfree ); +} + +int +ldap_pvt_thread_pool_setkey( + void *xctx, + void *key, + void *data, + ldap_pvt_thread_pool_keyfree_t *kfree, + void **olddatap, + ldap_pvt_thread_pool_keyfree_t **oldkfreep ) +{ + int rc; + ERROR_IF( !threading_enabled, "ldap_pvt_thread_pool_setkey" ); + rc = ldap_int_thread_pool_setkey( + xctx, key, data, kfree, olddatap, oldkfreep ); + ERROR_IF( rc, "ldap_pvt_thread_pool_setkey" ); + return rc; +} + +void +ldap_pvt_thread_pool_purgekey( void *key ) +{ + ERROR_IF( !threading_enabled, "ldap_pvt_thread_pool_purgekey" ); + ldap_int_thread_pool_purgekey( key ); +} + +void * +ldap_pvt_thread_pool_context( void ) +{ +#if 0 /* Function is used by ch_free() via slap_sl_contxt() in slapd */ + ERROR_IF( !threading_enabled, "ldap_pvt_thread_pool_context" ); +#endif + return ldap_int_thread_pool_context(); +} + +void +ldap_pvt_thread_pool_context_reset( void *vctx ) +{ + ERROR_IF( !threading_enabled, "ldap_pvt_thread_pool_context_reset" ); + ldap_int_thread_pool_context_reset( vctx ); +} + +#endif /* LDAP_THREAD_POOL_IMPLEMENTATION */ + +#endif /* LDAP_THREAD_DEBUG */ diff --git a/libraries/libldap_r/thr_nt.c b/libraries/libldap_r/thr_nt.c new file mode 100644 index 0000000..1de232d --- /dev/null +++ b/libraries/libldap_r/thr_nt.c @@ -0,0 +1,245 @@ +/* thr_nt.c - wrapper around NT threads */ +/* $OpenLDAP$ */ +/* This work is part of OpenLDAP Software <http://www.openldap.org/>. + * + * Copyright 1998-2021 The OpenLDAP Foundation. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted only as authorized by the OpenLDAP + * Public License. + * + * A copy of this license is available in file LICENSE in the + * top-level directory of the distribution or, alternatively, at + * <http://www.OpenLDAP.org/license.html>. + */ + +#include "portable.h" + +#if defined( HAVE_NT_THREADS ) + +#define _WIN32_WINNT 0x0400 +#include <windows.h> +#include <process.h> + +#include "ldap_pvt_thread.h" /* Get the thread interface */ +#define LDAP_THREAD_IMPLEMENTATION +#include "ldap_thr_debug.h" /* May rename the symbols defined below */ + +typedef struct ldap_int_thread_s { + long tid; + HANDLE thd; +} ldap_int_thread_s; + +#ifndef NT_MAX_THREADS +#define NT_MAX_THREADS 1024 +#endif + +static ldap_int_thread_s tids[NT_MAX_THREADS]; +static int ntids; + + +/* mingw compiler very sensitive about getting prototypes right */ +typedef unsigned __stdcall thrfunc_t(void *); + +int +ldap_int_thread_initialize( void ) +{ + return 0; +} + +int +ldap_int_thread_destroy( void ) +{ + return 0; +} + +int +ldap_int_mutex_firstcreate( ldap_int_thread_mutex_t *mutex ) +{ + if ( *mutex == NULL ) { + HANDLE p = CreateMutex( NULL, 0, NULL ); + if ( InterlockedCompareExchangePointer((PVOID*)mutex, (PVOID)p, NULL) != NULL) + CloseHandle( p ); + } + return 0; +} + +int +ldap_pvt_thread_create( ldap_pvt_thread_t * thread, + int detach, + void *(*start_routine)( void *), + void *arg) +{ + unsigned tid; + HANDLE thd; + int rc = -1; + + thd = (HANDLE) _beginthreadex(NULL, LDAP_PVT_THREAD_STACK_SIZE, (thrfunc_t *) start_routine, + arg, 0, &tid); + + if ( thd ) { + *thread = (ldap_pvt_thread_t) tid; + tids[ntids].tid = tid; + tids[ntids].thd = thd; + ntids++; + rc = 0; + } + return rc; +} + +void +ldap_pvt_thread_exit( void *retval ) +{ + _endthread( ); +} + +int +ldap_pvt_thread_join( ldap_pvt_thread_t thread, void **thread_return ) +{ + DWORD status; + int i; + + for (i=0; i<ntids; i++) { + if ( tids[i].tid == thread ) + break; + } + if ( i > ntids ) return -1; + + status = WaitForSingleObject( tids[i].thd, INFINITE ); + for (; i<ntids; i++) { + tids[i] = tids[i+1]; + } + ntids--; + return status == WAIT_FAILED ? -1 : 0; +} + +int +ldap_pvt_thread_kill( ldap_pvt_thread_t thread, int signo ) +{ + return 0; +} + +int +ldap_pvt_thread_yield( void ) +{ + Sleep( 0 ); + return 0; +} + +int +ldap_pvt_thread_cond_init( ldap_pvt_thread_cond_t *cond ) +{ + *cond = CreateEvent( NULL, FALSE, FALSE, NULL ); + return( 0 ); +} + +int +ldap_pvt_thread_cond_destroy( ldap_pvt_thread_cond_t *cv ) +{ + CloseHandle( *cv ); + return( 0 ); +} + +int +ldap_pvt_thread_cond_signal( ldap_pvt_thread_cond_t *cond ) +{ + SetEvent( *cond ); + return( 0 ); +} + +int +ldap_pvt_thread_cond_wait( ldap_pvt_thread_cond_t *cond, + ldap_pvt_thread_mutex_t *mutex ) +{ + SignalObjectAndWait( *mutex, *cond, INFINITE, FALSE ); + WaitForSingleObject( *mutex, INFINITE ); + return( 0 ); +} + +int +ldap_pvt_thread_cond_broadcast( ldap_pvt_thread_cond_t *cond ) +{ + while ( WaitForSingleObject( *cond, 0 ) == WAIT_TIMEOUT ) + SetEvent( *cond ); + return( 0 ); +} + +int +ldap_pvt_thread_mutex_init( ldap_pvt_thread_mutex_t *mutex ) +{ + *mutex = CreateMutex( NULL, 0, NULL ); + return ( 0 ); +} + +int +ldap_pvt_thread_mutex_destroy( ldap_pvt_thread_mutex_t *mutex ) +{ + CloseHandle( *mutex ); + return ( 0 ); +} + +int +ldap_pvt_thread_mutex_lock( ldap_pvt_thread_mutex_t *mutex ) +{ + DWORD status; + status = WaitForSingleObject( *mutex, INFINITE ); + return status == WAIT_FAILED ? -1 : 0; +} + +int +ldap_pvt_thread_mutex_unlock( ldap_pvt_thread_mutex_t *mutex ) +{ + ReleaseMutex( *mutex ); + return ( 0 ); +} + +int +ldap_pvt_thread_mutex_trylock( ldap_pvt_thread_mutex_t *mp ) +{ + DWORD status; + status = WaitForSingleObject( *mp, 0 ); + return status == WAIT_FAILED || status == WAIT_TIMEOUT + ? -1 : 0; +} + +ldap_pvt_thread_t +ldap_pvt_thread_self( void ) +{ + return GetCurrentThreadId(); +} + +int +ldap_pvt_thread_key_create( ldap_pvt_thread_key_t *keyp ) +{ + DWORD key = TlsAlloc(); + if ( key != TLS_OUT_OF_INDEXES ) { + *keyp = key; + return 0; + } else { + return -1; + } +} + +int +ldap_pvt_thread_key_destroy( ldap_pvt_thread_key_t key ) +{ + /* TlsFree returns 0 on failure */ + return( TlsFree( key ) == 0 ); +} + +int +ldap_pvt_thread_key_setdata( ldap_pvt_thread_key_t key, void *data ) +{ + return ( TlsSetValue( key, data ) == 0 ); +} + +int +ldap_pvt_thread_key_getdata( ldap_pvt_thread_key_t key, void **data ) +{ + void *ptr = TlsGetValue( key ); + *data = ptr; + return( ptr ? GetLastError() : 0 ); +} + +#endif diff --git a/libraries/libldap_r/thr_posix.c b/libraries/libldap_r/thr_posix.c new file mode 100644 index 0000000..e4b4357 --- /dev/null +++ b/libraries/libldap_r/thr_posix.c @@ -0,0 +1,388 @@ +/* thr_posix.c - wrapper around posix and posixish thread implementations. */ +/* $OpenLDAP$ */ +/* This work is part of OpenLDAP Software <http://www.openldap.org/>. + * + * Copyright 1998-2021 The OpenLDAP Foundation. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted only as authorized by the OpenLDAP + * Public License. + * + * A copy of this license is available in file LICENSE in the + * top-level directory of the distribution or, alternatively, at + * <http://www.OpenLDAP.org/license.html>. + */ + +#include "portable.h" + +#if defined( HAVE_PTHREADS ) + +#include <ac/errno.h> + +#ifdef REPLACE_BROKEN_YIELD +#ifndef HAVE_NANOSLEEP +#include <ac/socket.h> +#endif +#include <ac/time.h> +#endif + +#include "ldap_pvt_thread.h" /* Get the thread interface */ +#define LDAP_THREAD_IMPLEMENTATION +#define LDAP_THREAD_RDWR_IMPLEMENTATION +#include "ldap_thr_debug.h" /* May rename the symbols defined below */ +#include <signal.h> /* For pthread_kill() */ + +#if HAVE_PTHREADS < 6 +# define LDAP_INT_THREAD_ATTR_DEFAULT pthread_attr_default +# define LDAP_INT_THREAD_CONDATTR_DEFAULT pthread_condattr_default +# define LDAP_INT_THREAD_MUTEXATTR_DEFAULT pthread_mutexattr_default +#else +# define LDAP_INT_THREAD_ATTR_DEFAULT NULL +# define LDAP_INT_THREAD_CONDATTR_DEFAULT NULL +# define LDAP_INT_THREAD_MUTEXATTR_DEFAULT NULL +#endif + +#ifdef LDAP_THREAD_DEBUG +# if defined LDAP_INT_THREAD_MUTEXATTR /* May be defined in CPPFLAGS */ +# elif defined HAVE_PTHREAD_KILL_OTHER_THREADS_NP + /* LinuxThreads hack */ +# define LDAP_INT_THREAD_MUTEXATTR PTHREAD_MUTEX_ERRORCHECK_NP +# else +# define LDAP_INT_THREAD_MUTEXATTR PTHREAD_MUTEX_ERRORCHECK +# endif +static pthread_mutexattr_t mutex_attr; +# undef LDAP_INT_THREAD_MUTEXATTR_DEFAULT +# define LDAP_INT_THREAD_MUTEXATTR_DEFAULT &mutex_attr +#endif + +#if HAVE_PTHREADS < 7 +#define ERRVAL(val) ((val) < 0 ? errno : 0) +#else +#define ERRVAL(val) (val) +#endif + +int +ldap_int_thread_initialize( void ) +{ +#ifdef LDAP_INT_THREAD_MUTEXATTR + pthread_mutexattr_init( &mutex_attr ); + pthread_mutexattr_settype( &mutex_attr, LDAP_INT_THREAD_MUTEXATTR ); +#endif + return 0; +} + +int +ldap_int_thread_destroy( void ) +{ +#ifdef HAVE_PTHREAD_KILL_OTHER_THREADS_NP + /* LinuxThreads: kill clones */ + pthread_kill_other_threads_np(); +#endif +#ifdef LDAP_INT_THREAD_MUTEXATTR + pthread_mutexattr_destroy( &mutex_attr ); +#endif + return 0; +} + +#ifdef LDAP_THREAD_HAVE_SETCONCURRENCY +int +ldap_pvt_thread_set_concurrency(int n) +{ +#ifdef HAVE_PTHREAD_SETCONCURRENCY + return pthread_setconcurrency( n ); +#elif defined(HAVE_THR_SETCONCURRENCY) + return thr_setconcurrency( n ); +#else + return 0; +#endif +} +#endif + +#ifdef LDAP_THREAD_HAVE_GETCONCURRENCY +int +ldap_pvt_thread_get_concurrency(void) +{ +#ifdef HAVE_PTHREAD_GETCONCURRENCY + return pthread_getconcurrency(); +#elif defined(HAVE_THR_GETCONCURRENCY) + return thr_getconcurrency(); +#else + return 0; +#endif +} +#endif + +/* detachstate appeared in Draft 6, but without manifest constants. + * in Draft 7 they were called PTHREAD_CREATE_UNDETACHED and ...DETACHED. + * in Draft 8 on, ...UNDETACHED became ...JOINABLE. + */ +#ifndef PTHREAD_CREATE_JOINABLE +#ifdef PTHREAD_CREATE_UNDETACHED +#define PTHREAD_CREATE_JOINABLE PTHREAD_CREATE_UNDETACHED +#else +#define PTHREAD_CREATE_JOINABLE 0 +#endif +#endif + +#ifndef PTHREAD_CREATE_DETACHED +#define PTHREAD_CREATE_DETACHED 1 +#endif + +int +ldap_pvt_thread_create( ldap_pvt_thread_t * thread, + int detach, + void *(*start_routine)( void * ), + void *arg) +{ + int rtn; + pthread_attr_t attr; + +/* Always create the thread attrs, so we can set stacksize if we need to */ +#if HAVE_PTHREADS > 5 + pthread_attr_init(&attr); +#else + pthread_attr_create(&attr); +#endif + +#ifdef LDAP_PVT_THREAD_SET_STACK_SIZE + /* this should be tunable */ + pthread_attr_setstacksize( &attr, LDAP_PVT_THREAD_STACK_SIZE ); +#endif + +#if HAVE_PTHREADS > 5 + detach = detach ? PTHREAD_CREATE_DETACHED : PTHREAD_CREATE_JOINABLE; +#if HAVE_PTHREADS == 6 + pthread_attr_setdetachstate(&attr, &detach); +#else + pthread_attr_setdetachstate(&attr, detach); +#endif +#endif + +#if HAVE_PTHREADS < 5 + rtn = pthread_create( thread, attr, start_routine, arg ); +#else + rtn = pthread_create( thread, &attr, start_routine, arg ); +#endif + +#if HAVE_PTHREADS > 5 + pthread_attr_destroy(&attr); +#else + pthread_attr_delete(&attr); + if( detach ) { + pthread_detach( thread ); + } +#endif + +#if HAVE_PTHREADS < 7 + if ( rtn < 0 ) rtn = errno; +#endif + return rtn; +} + +void +ldap_pvt_thread_exit( void *retval ) +{ + pthread_exit( retval ); +} + +int +ldap_pvt_thread_join( ldap_pvt_thread_t thread, void **thread_return ) +{ +#if HAVE_PTHREADS < 7 + void *dummy; + if (thread_return==NULL) + thread_return=&dummy; +#endif + return ERRVAL( pthread_join( thread, thread_return ) ); +} + +int +ldap_pvt_thread_kill( ldap_pvt_thread_t thread, int signo ) +{ +#if defined(HAVE_PTHREAD_KILL) && HAVE_PTHREADS > 4 + /* MacOS 10.1 is detected as v10 but has no pthread_kill() */ + return ERRVAL( pthread_kill( thread, signo ) ); +#else + /* pthread package with DCE */ + if (kill( getpid(), signo )<0) + return errno; + return 0; +#endif +} + +int +ldap_pvt_thread_yield( void ) +{ +#ifdef REPLACE_BROKEN_YIELD +#ifdef HAVE_NANOSLEEP + struct timespec t = { 0, 0 }; + nanosleep(&t, NULL); +#else + struct timeval tv = {0,0}; + select( 0, NULL, NULL, NULL, &tv ); +#endif + return 0; + +#elif defined(HAVE_THR_YIELD) + thr_yield(); + return 0; + +#elif HAVE_PTHREADS == 10 + return sched_yield(); + +#elif defined(_POSIX_THREAD_IS_GNU_PTH) + sched_yield(); + return 0; + +#elif HAVE_PTHREADS == 6 + pthread_yield(NULL); + return 0; + +#else + pthread_yield(); + return 0; +#endif +} + +int +ldap_pvt_thread_cond_init( ldap_pvt_thread_cond_t *cond ) +{ + return ERRVAL( pthread_cond_init( + cond, LDAP_INT_THREAD_CONDATTR_DEFAULT ) ); +} + +int +ldap_pvt_thread_cond_destroy( ldap_pvt_thread_cond_t *cond ) +{ + return ERRVAL( pthread_cond_destroy( cond ) ); +} + +int +ldap_pvt_thread_cond_signal( ldap_pvt_thread_cond_t *cond ) +{ + return ERRVAL( pthread_cond_signal( cond ) ); +} + +int +ldap_pvt_thread_cond_broadcast( ldap_pvt_thread_cond_t *cond ) +{ + return ERRVAL( pthread_cond_broadcast( cond ) ); +} + +int +ldap_pvt_thread_cond_wait( ldap_pvt_thread_cond_t *cond, + ldap_pvt_thread_mutex_t *mutex ) +{ + return ERRVAL( pthread_cond_wait( cond, mutex ) ); +} + +int +ldap_pvt_thread_mutex_init( ldap_pvt_thread_mutex_t *mutex ) +{ + return ERRVAL( pthread_mutex_init( + mutex, LDAP_INT_THREAD_MUTEXATTR_DEFAULT ) ); +} + +int +ldap_pvt_thread_mutex_destroy( ldap_pvt_thread_mutex_t *mutex ) +{ + return ERRVAL( pthread_mutex_destroy( mutex ) ); +} + +int +ldap_pvt_thread_mutex_lock( ldap_pvt_thread_mutex_t *mutex ) +{ + return ERRVAL( pthread_mutex_lock( mutex ) ); +} + +int +ldap_pvt_thread_mutex_trylock( ldap_pvt_thread_mutex_t *mutex ) +{ + return ERRVAL( pthread_mutex_trylock( mutex ) ); +} + +int +ldap_pvt_thread_mutex_unlock( ldap_pvt_thread_mutex_t *mutex ) +{ + return ERRVAL( pthread_mutex_unlock( mutex ) ); +} + +ldap_pvt_thread_t ldap_pvt_thread_self( void ) +{ + return pthread_self(); +} + +int +ldap_pvt_thread_key_create( ldap_pvt_thread_key_t *key ) +{ + return pthread_key_create( key, NULL ); +} + +int +ldap_pvt_thread_key_destroy( ldap_pvt_thread_key_t key ) +{ + return pthread_key_delete( key ); +} + +int +ldap_pvt_thread_key_setdata( ldap_pvt_thread_key_t key, void *data ) +{ + return pthread_setspecific( key, data ); +} + +int +ldap_pvt_thread_key_getdata( ldap_pvt_thread_key_t key, void **data ) +{ + *data = pthread_getspecific( key ); + return 0; +} + +#ifdef LDAP_THREAD_HAVE_RDWR +#ifdef HAVE_PTHREAD_RWLOCK_DESTROY +int +ldap_pvt_thread_rdwr_init( ldap_pvt_thread_rdwr_t *rw ) +{ + return ERRVAL( pthread_rwlock_init( rw, NULL ) ); +} + +int +ldap_pvt_thread_rdwr_destroy( ldap_pvt_thread_rdwr_t *rw ) +{ + return ERRVAL( pthread_rwlock_destroy( rw ) ); +} + +int ldap_pvt_thread_rdwr_rlock( ldap_pvt_thread_rdwr_t *rw ) +{ + return ERRVAL( pthread_rwlock_rdlock( rw ) ); +} + +int ldap_pvt_thread_rdwr_rtrylock( ldap_pvt_thread_rdwr_t *rw ) +{ + return ERRVAL( pthread_rwlock_tryrdlock( rw ) ); +} + +int ldap_pvt_thread_rdwr_runlock( ldap_pvt_thread_rdwr_t *rw ) +{ + return ERRVAL( pthread_rwlock_unlock( rw ) ); +} + +int ldap_pvt_thread_rdwr_wlock( ldap_pvt_thread_rdwr_t *rw ) +{ + return ERRVAL( pthread_rwlock_wrlock( rw ) ); +} + +int ldap_pvt_thread_rdwr_wtrylock( ldap_pvt_thread_rdwr_t *rw ) +{ + return ERRVAL( pthread_rwlock_trywrlock( rw ) ); +} + +int ldap_pvt_thread_rdwr_wunlock( ldap_pvt_thread_rdwr_t *rw ) +{ + return ERRVAL( pthread_rwlock_unlock( rw ) ); +} + +#endif /* HAVE_PTHREAD_RWLOCK_DESTROY */ +#endif /* LDAP_THREAD_HAVE_RDWR */ +#endif /* HAVE_PTHREADS */ + diff --git a/libraries/libldap_r/thr_pth.c b/libraries/libldap_r/thr_pth.c new file mode 100644 index 0000000..13377a0 --- /dev/null +++ b/libraries/libldap_r/thr_pth.c @@ -0,0 +1,231 @@ +/* thr_pth.c - wrappers around GNU Pth */ +/* $OpenLDAP$ */ +/* This work is part of OpenLDAP Software <http://www.openldap.org/>. + * + * Copyright 1998-2021 The OpenLDAP Foundation. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted only as authorized by the OpenLDAP + * Public License. + * + * A copy of this license is available in file LICENSE in the + * top-level directory of the distribution or, alternatively, at + * <http://www.OpenLDAP.org/license.html>. + */ + +#include "portable.h" + +#if defined( HAVE_GNU_PTH ) + +#include "ldap_pvt_thread.h" /* Get the thread interface */ +#define LDAP_THREAD_IMPLEMENTATION +#define LDAP_THREAD_RDWR_IMPLEMENTATION +#include "ldap_thr_debug.h" /* May rename the symbols defined below */ + +#include <errno.h> + +/******************* + * * + * GNU Pth Threads * + * * + *******************/ + +static pth_attr_t detach_attr; +static pth_attr_t joined_attr; + +int +ldap_int_thread_initialize( void ) +{ + if( !pth_init() ) { + return -1; + } + detach_attr = pth_attr_new(); + joined_attr = pth_attr_new(); +#ifdef LDAP_PVT_THREAD_SET_STACK_SIZE + pth_attr_set( joined_attr, PTH_ATTR_STACK_SIZE, LDAP_PVT_THREAD_STACK_SIZE ); + pth_attr_set( detach_attr, PTH_ATTR_STACK_SIZE, LDAP_PVT_THREAD_STACK_SIZE ); +#endif + return pth_attr_set( detach_attr, PTH_ATTR_JOINABLE, FALSE ); +} + +int +ldap_int_thread_destroy( void ) +{ + pth_attr_destroy(detach_attr); + pth_kill(); + return 0; +} + +int +ldap_pvt_thread_create( ldap_pvt_thread_t * thread, + int detach, + void *(*start_routine)( void *), + void *arg) +{ + *thread = pth_spawn( detach ? detach_attr : joined_attr, + start_routine, arg ); + + return *thread == NULL ? errno : 0; +} + +void +ldap_pvt_thread_exit( void *retval ) +{ + pth_exit( retval ); +} + +int ldap_pvt_thread_join( ldap_pvt_thread_t thread, void **thread_return ) +{ + return pth_join( thread, thread_return ) ? 0 : errno; +} + +int +ldap_pvt_thread_kill( ldap_pvt_thread_t thread, int signo ) +{ + return pth_raise( thread, signo ) ? 0 : errno; +} + +int +ldap_pvt_thread_yield( void ) +{ + return pth_yield(NULL) ? 0 : errno; +} + +int +ldap_pvt_thread_cond_init( ldap_pvt_thread_cond_t *cond ) +{ + return( pth_cond_init( cond ) ? 0 : errno ); +} + +int +ldap_pvt_thread_cond_signal( ldap_pvt_thread_cond_t *cond ) +{ + return( pth_cond_notify( cond, 0 ) ? 0 : errno ); +} + +int +ldap_pvt_thread_cond_broadcast( ldap_pvt_thread_cond_t *cond ) +{ + return( pth_cond_notify( cond, 1 ) ? 0 : errno ); +} + +int +ldap_pvt_thread_cond_wait( ldap_pvt_thread_cond_t *cond, + ldap_pvt_thread_mutex_t *mutex ) +{ + return( pth_cond_await( cond, mutex, NULL ) ? 0 : errno ); +} + +int +ldap_pvt_thread_cond_destroy( ldap_pvt_thread_cond_t *cv ) +{ + return 0; +} + +int +ldap_pvt_thread_mutex_init( ldap_pvt_thread_mutex_t *mutex ) +{ + return( pth_mutex_init( mutex ) ? 0 : errno ); +} + +int +ldap_pvt_thread_mutex_destroy( ldap_pvt_thread_mutex_t *mutex ) +{ + return 0; +} + +int +ldap_pvt_thread_mutex_lock( ldap_pvt_thread_mutex_t *mutex ) +{ + return( pth_mutex_acquire( mutex, 0, NULL ) ? 0 : errno ); +} + +int +ldap_pvt_thread_mutex_unlock( ldap_pvt_thread_mutex_t *mutex ) +{ + return( pth_mutex_release( mutex ) ? 0 : errno ); +} + +int +ldap_pvt_thread_mutex_trylock( ldap_pvt_thread_mutex_t *mutex ) +{ + return( pth_mutex_acquire( mutex, 1, NULL ) ? 0 : errno ); +} + +ldap_pvt_thread_t +ldap_pvt_thread_self( void ) +{ + return pth_self(); +} + +int +ldap_pvt_thread_key_create( ldap_pvt_thread_key_t *key ) +{ + return pth_key_create( key, NULL ); +} + +int +ldap_pvt_thread_key_destroy( ldap_pvt_thread_key_t key ) +{ + return pth_key_delete( key ); +} + +int +ldap_pvt_thread_key_setdata( ldap_pvt_thread_key_t key, void *data ) +{ + return pth_key_setdata( key, data ); +} + +int +ldap_pvt_thread_key_getdata( ldap_pvt_thread_key_t key, void **data ) +{ + *data = pth_key_getdata( key ); + return 0; +} + +#ifdef LDAP_THREAD_HAVE_RDWR +int +ldap_pvt_thread_rdwr_init( ldap_pvt_thread_rdwr_t *rw ) +{ + return pth_rwlock_init( rw ) ? 0 : errno; +} + +int +ldap_pvt_thread_rdwr_destroy( ldap_pvt_thread_rdwr_t *rw ) +{ + return 0; +} + +int ldap_pvt_thread_rdwr_rlock( ldap_pvt_thread_rdwr_t *rw ) +{ + return pth_rwlock_acquire( rw, PTH_RWLOCK_RD, 0, NULL ) ? 0 : errno; +} + +int ldap_pvt_thread_rdwr_rtrylock( ldap_pvt_thread_rdwr_t *rw ) +{ + return pth_rwlock_acquire( rw, PTH_RWLOCK_RD, 1, NULL ) ? 0 : errno; +} + +int ldap_pvt_thread_rdwr_runlock( ldap_pvt_thread_rdwr_t *rw ) +{ + return pth_rwlock_release( rw ) ? 0 : errno; +} + +int ldap_pvt_thread_rdwr_wlock( ldap_pvt_thread_rdwr_t *rw ) +{ + return pth_rwlock_acquire( rw, PTH_RWLOCK_RW, 0, NULL ) ? 0 : errno; +} + +int ldap_pvt_thread_rdwr_wtrylock( ldap_pvt_thread_rdwr_t *rw ) +{ + return pth_rwlock_acquire( rw, PTH_RWLOCK_RW, 1, NULL ) ? 0 : errno; +} + +int ldap_pvt_thread_rdwr_wunlock( ldap_pvt_thread_rdwr_t *rw ) +{ + return pth_rwlock_release( rw ) ? 0 : errno; +} + +#endif /* LDAP_THREAD_HAVE_RDWR */ +#endif /* HAVE_GNU_PTH */ diff --git a/libraries/libldap_r/thr_stub.c b/libraries/libldap_r/thr_stub.c new file mode 100644 index 0000000..05357d9 --- /dev/null +++ b/libraries/libldap_r/thr_stub.c @@ -0,0 +1,305 @@ +/* thr_stub.c - stubs for the threads */ +/* $OpenLDAP$ */ +/* This work is part of OpenLDAP Software <http://www.openldap.org/>. + * + * Copyright 1998-2021 The OpenLDAP Foundation. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted only as authorized by the OpenLDAP + * Public License. + * + * A copy of this license is available in file LICENSE in the + * top-level directory of the distribution or, alternatively, at + * <http://www.OpenLDAP.org/license.html>. + */ + +#include "portable.h" + +#if defined( NO_THREADS ) + +#include "ldap_pvt_thread.h" /* Get the thread interface */ +#define LDAP_THREAD_IMPLEMENTATION +#define LDAP_THREAD_POOL_IMPLEMENTATION +#include "ldap_thr_debug.h" /* May rename the symbols defined below */ + +/*********************************************************************** + * * + * no threads package defined for this system - fake ok returns from * + * all threads routines (making it single-threaded). * + * * + ***********************************************************************/ + +int +ldap_int_thread_initialize( void ) +{ + return 0; +} + +int +ldap_int_thread_destroy( void ) +{ + return 0; +} + +static void* ldap_int_status = NULL; + +int +ldap_pvt_thread_create( ldap_pvt_thread_t * thread, + int detach, + void *(*start_routine)(void *), + void *arg) +{ + if( ! detach ) ldap_int_status = NULL; + start_routine( arg ); + return 0; +} + +void +ldap_pvt_thread_exit( void *retval ) +{ + if( retval != NULL ) { + ldap_int_status = retval; + } + return; +} + +int +ldap_pvt_thread_join( ldap_pvt_thread_t thread, void **status ) +{ + if(status != NULL) *status = ldap_int_status; + return 0; +} + +int +ldap_pvt_thread_kill( ldap_pvt_thread_t thread, int signo ) +{ + return 0; +} + +int +ldap_pvt_thread_yield( void ) +{ + return 0; +} + +int +ldap_pvt_thread_cond_init( ldap_pvt_thread_cond_t *cond ) +{ + return 0; +} + +int +ldap_pvt_thread_cond_destroy( ldap_pvt_thread_cond_t *cond ) +{ + return 0; +} + +int +ldap_pvt_thread_cond_signal( ldap_pvt_thread_cond_t *cond ) +{ + return 0; +} + +int +ldap_pvt_thread_cond_broadcast( ldap_pvt_thread_cond_t *cond ) +{ + return 0; +} + +int +ldap_pvt_thread_cond_wait( ldap_pvt_thread_cond_t *cond, + ldap_pvt_thread_mutex_t *mutex ) +{ + return 0; +} + +int +ldap_pvt_thread_mutex_init( ldap_pvt_thread_mutex_t *mutex ) +{ + return 0; +} + +int +ldap_pvt_thread_mutex_destroy( ldap_pvt_thread_mutex_t *mutex ) +{ + return 0; +} + +int +ldap_pvt_thread_mutex_lock( ldap_pvt_thread_mutex_t *mutex ) +{ + return 0; +} + +int +ldap_pvt_thread_mutex_trylock( ldap_pvt_thread_mutex_t *mutex ) +{ + return 0; +} + +int +ldap_pvt_thread_mutex_unlock( ldap_pvt_thread_mutex_t *mutex ) +{ + return 0; +} + +/* + * NO_THREADS requires a separate tpool implementation since + * generic ldap_pvt_thread_pool_wrapper loops forever. + */ +int +ldap_pvt_thread_pool_init ( + ldap_pvt_thread_pool_t *pool_out, + int max_concurrency, int max_pending ) +{ + *pool_out = (ldap_pvt_thread_pool_t) 0; + return(0); +} + +int +ldap_pvt_thread_pool_submit ( + ldap_pvt_thread_pool_t *pool, + ldap_pvt_thread_start_t *start_routine, void *arg ) +{ + (start_routine)(NULL, arg); + return(0); +} + +int +ldap_pvt_thread_pool_retract ( + ldap_pvt_thread_pool_t *pool, + ldap_pvt_thread_start_t *start_routine, void *arg ) +{ + return(0); +} + +int +ldap_pvt_thread_pool_maxthreads ( ldap_pvt_thread_pool_t *tpool, int max_threads ) +{ + return(0); +} + +int +ldap_pvt_thread_pool_query( ldap_pvt_thread_pool_t *tpool, + ldap_pvt_thread_pool_param_t param, void *value ) +{ + *(int *)value = -1; + return(-1); +} + +int +ldap_pvt_thread_pool_backload ( + ldap_pvt_thread_pool_t *pool ) +{ + return(0); +} + +int +ldap_pvt_thread_pool_destroy ( + ldap_pvt_thread_pool_t *pool, int run_pending ) +{ + return(0); +} + +void +ldap_pvt_thread_pool_idle ( ldap_pvt_thread_pool_t *pool ) +{ + return; +} + +void +ldap_pvt_thread_pool_unidle ( ldap_pvt_thread_pool_t *pool ) +{ + return; +} + +int ldap_pvt_thread_pool_getkey ( + void *ctx, void *key, void **data, ldap_pvt_thread_pool_keyfree_t **kfree ) +{ + return(0); +} + +int ldap_pvt_thread_pool_setkey ( + void *ctx, void *key, + void *data, ldap_pvt_thread_pool_keyfree_t *kfree, + void **olddatap, ldap_pvt_thread_pool_keyfree_t **oldkfreep ) +{ + if ( olddatap ) *olddatap = NULL; + if ( oldkfreep ) *oldkfreep = 0; + return(0); +} + +void ldap_pvt_thread_pool_purgekey( void *key ) +{ +} + +int ldap_pvt_thread_pool_pause ( + ldap_pvt_thread_pool_t *tpool ) +{ + return(0); +} + +int ldap_pvt_thread_pool_resume ( + ldap_pvt_thread_pool_t *tpool ) +{ + return(0); +} + +int ldap_pvt_thread_pool_pausing( ldap_pvt_thread_pool_t *tpool ) +{ + return(0); +} + +ldap_pvt_thread_pool_pausecheck( ldap_pvt_thread_pool_t *tpool ) +{ + return(0); +} + +void *ldap_pvt_thread_pool_context( ) +{ + return(NULL); +} + +void ldap_pvt_thread_pool_context_reset( void *vctx ) +{ +} + +ldap_pvt_thread_t +ldap_pvt_thread_self( void ) +{ + return(0); +} + +int +ldap_pvt_thread_key_create( ldap_pvt_thread_key_t *key ) +{ + return(0); +} + +int +ldap_pvt_thread_key_destroy( ldap_pvt_thread_key_t key ) +{ + return(0); +} + +int +ldap_pvt_thread_key_setdata( ldap_pvt_thread_key_t key, void *data ) +{ + return(0); +} + +int +ldap_pvt_thread_key_getdata( ldap_pvt_thread_key_t key, void **data ) +{ + return(0); +} + +ldap_pvt_thread_t +ldap_pvt_thread_pool_tid( void *vctx ) +{ + + return(0); +} + +#endif /* NO_THREADS */ diff --git a/libraries/libldap_r/thr_thr.c b/libraries/libldap_r/thr_thr.c new file mode 100644 index 0000000..dfb41a6 --- /dev/null +++ b/libraries/libldap_r/thr_thr.c @@ -0,0 +1,186 @@ +/* thr_thr.c - wrappers around solaris threads */ +/* $OpenLDAP$ */ +/* This work is part of OpenLDAP Software <http://www.openldap.org/>. + * + * Copyright 1998-2021 The OpenLDAP Foundation. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted only as authorized by the OpenLDAP + * Public License. + * + * A copy of this license is available in file LICENSE in the + * top-level directory of the distribution or, alternatively, at + * <http://www.OpenLDAP.org/license.html>. + */ + +#include "portable.h" + +#if defined( HAVE_THR ) + +#include "ldap_pvt_thread.h" /* Get the thread interface */ +#define LDAP_THREAD_IMPLEMENTATION +#include "ldap_thr_debug.h" /* May rename the symbols defined below */ + +/******************* + * * + * Solaris Threads * + * * + *******************/ + +int +ldap_int_thread_initialize( void ) +{ + return 0; +} + +int +ldap_int_thread_destroy( void ) +{ + return 0; +} + +#ifdef LDAP_THREAD_HAVE_SETCONCURRENCY +int +ldap_pvt_thread_set_concurrency(int n) +{ + return thr_setconcurrency( n ); +} +#endif + +#ifdef LDAP_THREAD_HAVE_GETCONCURRENCY +int +ldap_pvt_thread_get_concurrency(void) +{ + return thr_getconcurrency(); +} +#endif + +int +ldap_pvt_thread_create( ldap_pvt_thread_t * thread, + int detach, + void *(*start_routine)( void *), + void *arg) +{ + return( thr_create( NULL, LDAP_PVT_THREAD_STACK_SIZE, start_routine, + arg, detach ? THR_DETACHED : 0, thread ) ); +} + +void +ldap_pvt_thread_exit( void *retval ) +{ + thr_exit( NULL ); +} + +int ldap_pvt_thread_join( ldap_pvt_thread_t thread, void **thread_return ) +{ + thr_join( thread, NULL, thread_return ); + return 0; +} + +int +ldap_pvt_thread_kill( ldap_pvt_thread_t thread, int signo ) +{ + thr_kill( thread, signo ); + return 0; +} + +int +ldap_pvt_thread_yield( void ) +{ + thr_yield(); + return 0; +} + +int +ldap_pvt_thread_cond_init( ldap_pvt_thread_cond_t *cond ) +{ + return( cond_init( cond, USYNC_THREAD, NULL ) ); +} + +int +ldap_pvt_thread_cond_signal( ldap_pvt_thread_cond_t *cond ) +{ + return( cond_signal( cond ) ); +} + +int +ldap_pvt_thread_cond_broadcast( ldap_pvt_thread_cond_t *cv ) +{ + return( cond_broadcast( cv ) ); +} + +int +ldap_pvt_thread_cond_wait( ldap_pvt_thread_cond_t *cond, + ldap_pvt_thread_mutex_t *mutex ) +{ + return( cond_wait( cond, mutex ) ); +} + +int +ldap_pvt_thread_cond_destroy( ldap_pvt_thread_cond_t *cv ) +{ + return( cond_destroy( cv ) ); +} + +int +ldap_pvt_thread_mutex_init( ldap_pvt_thread_mutex_t *mutex ) +{ + return( mutex_init( mutex, USYNC_THREAD, NULL ) ); +} + +int +ldap_pvt_thread_mutex_destroy( ldap_pvt_thread_mutex_t *mutex ) +{ + return( mutex_destroy( mutex ) ); +} + +int +ldap_pvt_thread_mutex_lock( ldap_pvt_thread_mutex_t *mutex ) +{ + return( mutex_lock( mutex ) ); +} + +int +ldap_pvt_thread_mutex_unlock( ldap_pvt_thread_mutex_t *mutex ) +{ + return( mutex_unlock( mutex ) ); +} + +int +ldap_pvt_thread_mutex_trylock( ldap_pvt_thread_mutex_t *mp ) +{ + return( mutex_trylock( mp ) ); +} + +ldap_pvt_thread_t +ldap_pvt_thread_self( void ) +{ + return thr_self(); +} + +int +ldap_pvt_thread_key_create( ldap_pvt_thread_key_t *key ) +{ + return thr_keycreate( key, NULL ); +} + +int +ldap_pvt_thread_key_destroy( ldap_pvt_thread_key_t key ) +{ + return( 0 ); +} + +int +ldap_pvt_thread_key_setdata( ldap_pvt_thread_key_t key, void *data ) +{ + return thr_setspecific( key, data ); +} + +int +ldap_pvt_thread_key_getdata( ldap_pvt_thread_key_t key, void **data ) +{ + return thr_getspecific( key, data ); +} + +#endif /* HAVE_THR */ diff --git a/libraries/libldap_r/threads.c b/libraries/libldap_r/threads.c new file mode 100644 index 0000000..ff9ed8f --- /dev/null +++ b/libraries/libldap_r/threads.c @@ -0,0 +1,113 @@ +/* $OpenLDAP$ */ +/* This work is part of OpenLDAP Software <http://www.openldap.org/>. + * + * Copyright 1998-2021 The OpenLDAP Foundation. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted only as authorized by the OpenLDAP + * Public License. + * + * A copy of this license is available in file LICENSE in the + * top-level directory of the distribution or, alternatively, at + * <http://www.OpenLDAP.org/license.html>. + */ + +#include "portable.h" + +#include <stdio.h> + +#include <ac/stdarg.h> +#include <ac/stdlib.h> +#include <ac/string.h> +#include <ac/unistd.h> + +#include "ldap_pvt_thread.h" /* Get the thread interface */ +#include "ldap_thr_debug.h" /* May redirect thread initialize/destroy calls */ + + +/* + * Common LDAP thread routines + * see thr_*.c for implementation specific routines + * see rdwr.c for generic reader/writer lock implementation + * see tpool.c for generic thread pool implementation + */ + + +int ldap_pvt_thread_initialize( void ) +{ + int rc; + static int init = 0; + ldap_pvt_thread_rmutex_t rm; + ldap_pvt_thread_t tid; + + /* we only get one shot at this */ + if( init++ ) return -1; + + rc = ldap_int_thread_initialize(); + if( rc ) return rc; + +#ifndef LDAP_THREAD_HAVE_TPOOL + rc = ldap_int_thread_pool_startup(); + if( rc ) return rc; +#endif + + /* kludge to pull symbol definitions in */ + ldap_pvt_thread_rmutex_init( &rm ); + tid = ldap_pvt_thread_self(); + ldap_pvt_thread_rmutex_lock( &rm, tid ); + ldap_pvt_thread_rmutex_trylock( &rm, tid ); + ldap_pvt_thread_rmutex_unlock( &rm, tid ); + ldap_pvt_thread_rmutex_unlock( &rm, tid ); + ldap_pvt_thread_rmutex_destroy( &rm ); + + return 0; +} + +int ldap_pvt_thread_destroy( void ) +{ +#ifndef LDAP_THREAD_HAVE_TPOOL + (void) ldap_int_thread_pool_shutdown(); +#endif + return ldap_int_thread_destroy(); +} + + +/* + * Default implementations of some LDAP thread routines + */ + +#define LDAP_THREAD_IMPLEMENTATION +#include "ldap_thr_debug.h" /* May rename the symbols defined below */ + + +#ifndef LDAP_THREAD_HAVE_GETCONCURRENCY +int +ldap_pvt_thread_get_concurrency ( void ) +{ + return 1; +} +#endif + +#ifndef LDAP_THREAD_HAVE_SETCONCURRENCY +int +ldap_pvt_thread_set_concurrency ( int concurrency ) +{ + return 1; +} +#endif + +#ifndef LDAP_THREAD_HAVE_SLEEP +/* + * Here we assume we have fully preemptive threads and that sleep() + * does the right thing. + */ +unsigned int +ldap_pvt_thread_sleep( + unsigned int interval +) +{ + sleep( interval ); + return 0; +} +#endif diff --git a/libraries/libldap_r/tpool.c b/libraries/libldap_r/tpool.c new file mode 100644 index 0000000..17cee3b --- /dev/null +++ b/libraries/libldap_r/tpool.c @@ -0,0 +1,1032 @@ +/* $OpenLDAP$ */ +/* This work is part of OpenLDAP Software <http://www.openldap.org/>. + * + * Copyright 1998-2021 The OpenLDAP Foundation. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted only as authorized by the OpenLDAP + * Public License. + * + * A copy of this license is available in file LICENSE in the + * top-level directory of the distribution or, alternatively, at + * <http://www.OpenLDAP.org/license.html>. + */ + +#include "portable.h" + +#include <stdio.h> + +#include <ac/signal.h> +#include <ac/stdarg.h> +#include <ac/stdlib.h> +#include <ac/string.h> +#include <ac/time.h> +#include <ac/errno.h> + +#include "ldap-int.h" +#include "ldap_pvt_thread.h" /* Get the thread interface */ +#include "ldap_queue.h" +#define LDAP_THREAD_POOL_IMPLEMENTATION +#include "ldap_thr_debug.h" /* May rename symbols defined below */ + +#ifndef LDAP_THREAD_HAVE_TPOOL + +/* Thread-specific key with data and optional free function */ +typedef struct ldap_int_tpool_key_s { + void *ltk_key; + void *ltk_data; + ldap_pvt_thread_pool_keyfree_t *ltk_free; +} ldap_int_tpool_key_t; + +/* Max number of thread-specific keys we store per thread. + * We don't expect to use many... + */ +#define MAXKEYS 32 + +/* Max number of threads */ +#define LDAP_MAXTHR 1024 /* must be a power of 2 */ + +/* (Theoretical) max number of pending requests */ +#define MAX_PENDING (INT_MAX/2) /* INT_MAX - (room to avoid overflow) */ + +/* pool->ltp_pause values */ +enum { NOT_PAUSED = 0, WANT_PAUSE = 1, PAUSED = 2 }; + +/* Context: thread ID and thread-specific key/data pairs */ +typedef struct ldap_int_thread_userctx_s { + ldap_pvt_thread_t ltu_id; + ldap_int_tpool_key_t ltu_key[MAXKEYS]; +} ldap_int_thread_userctx_t; + + +/* Simple {thread ID -> context} hash table; key=ctx->ltu_id. + * Protected by ldap_pvt_thread_pool_mutex except during pauses, + * when it is read-only (used by pool_purgekey and pool_context). + * Protected by tpool->ltp_mutex during pauses. + */ +static struct { + ldap_int_thread_userctx_t *ctx; + /* ctx is valid when not NULL or DELETED_THREAD_CTX */ +# define DELETED_THREAD_CTX (&ldap_int_main_thrctx + 1) /* dummy addr */ +} thread_keys[LDAP_MAXTHR]; + +#define TID_HASH(tid, hash) do { \ + unsigned const char *ptr_ = (unsigned const char *)&(tid); \ + unsigned i_; \ + for (i_ = 0, (hash) = ptr_[0]; ++i_ < sizeof(tid);) \ + (hash) += ((hash) << 5) ^ ptr_[i_]; \ +} while(0) + + +/* Task for a thread to perform */ +typedef struct ldap_int_thread_task_s { + union { + LDAP_STAILQ_ENTRY(ldap_int_thread_task_s) q; + LDAP_SLIST_ENTRY(ldap_int_thread_task_s) l; + } ltt_next; + ldap_pvt_thread_start_t *ltt_start_routine; + void *ltt_arg; +} ldap_int_thread_task_t; + +typedef LDAP_STAILQ_HEAD(tcq, ldap_int_thread_task_s) ldap_int_tpool_plist_t; + +struct ldap_int_thread_pool_s { + LDAP_STAILQ_ENTRY(ldap_int_thread_pool_s) ltp_next; + + /* protect members below, and protect thread_keys[] during pauses */ + ldap_pvt_thread_mutex_t ltp_mutex; + + /* not paused and something to do for pool_<wrapper/pause/destroy>() */ + ldap_pvt_thread_cond_t ltp_cond; + + /* ltp_active_count <= 1 && ltp_pause */ + ldap_pvt_thread_cond_t ltp_pcond; + + /* ltp_pause == 0 ? <p_pending_list : &empty_pending_list, + * maintaned to reduce work for pool_wrapper() + */ + ldap_int_tpool_plist_t *ltp_work_list; + + /* pending tasks, and unused task objects */ + ldap_int_tpool_plist_t ltp_pending_list; + LDAP_SLIST_HEAD(tcl, ldap_int_thread_task_s) ltp_free_list; + + /* The pool is finishing, waiting for its threads to close. + * They close when ltp_pending_list is done. pool_submit() + * rejects new tasks. ltp_max_pending = -(its old value). + */ + int ltp_finishing; + + /* Some active task needs to be the sole active task. + * Atomic variable so ldap_pvt_thread_pool_pausing() can read it. + * Note: Pauses adjust ltp_<open_count/vary_open_count/work_list>, + * so pool_<submit/wrapper>() mostly can avoid testing ltp_pause. + */ + volatile sig_atomic_t ltp_pause; + + /* Max number of threads in pool, or 0 for default (LDAP_MAXTHR) */ + int ltp_max_count; + + /* Max pending + paused + idle tasks, negated when ltp_finishing */ + int ltp_max_pending; + + int ltp_pending_count; /* Pending + paused + idle tasks */ + int ltp_active_count; /* Active, not paused/idle tasks */ + int ltp_open_count; /* Number of threads, negated when ltp_pause */ + int ltp_starting; /* Currenlty starting threads */ + + /* >0 if paused or we may open a thread, <0 if we should close a thread. + * Updated when ltp_<finishing/pause/max_count/open_count> change. + * Maintained to reduce the time ltp_mutex must be locked in + * ldap_pvt_thread_pool_<submit/wrapper>(). + */ + int ltp_vary_open_count; +# define SET_VARY_OPEN_COUNT(pool) \ + ((pool)->ltp_vary_open_count = \ + (pool)->ltp_pause ? 1 : \ + (pool)->ltp_finishing ? -1 : \ + ((pool)->ltp_max_count ? (pool)->ltp_max_count : LDAP_MAXTHR) \ + - (pool)->ltp_open_count) +}; + +static ldap_int_tpool_plist_t empty_pending_list = + LDAP_STAILQ_HEAD_INITIALIZER(empty_pending_list); + +static int ldap_int_has_thread_pool = 0; +static LDAP_STAILQ_HEAD(tpq, ldap_int_thread_pool_s) + ldap_int_thread_pool_list = + LDAP_STAILQ_HEAD_INITIALIZER(ldap_int_thread_pool_list); + +static ldap_pvt_thread_mutex_t ldap_pvt_thread_pool_mutex; + +static void *ldap_int_thread_pool_wrapper( void *pool ); + +static ldap_pvt_thread_key_t ldap_tpool_key; + +/* Context of the main thread */ +static ldap_int_thread_userctx_t ldap_int_main_thrctx; + +int +ldap_int_thread_pool_startup ( void ) +{ + ldap_int_main_thrctx.ltu_id = ldap_pvt_thread_self(); + ldap_pvt_thread_key_create( &ldap_tpool_key ); + return ldap_pvt_thread_mutex_init(&ldap_pvt_thread_pool_mutex); +} + +int +ldap_int_thread_pool_shutdown ( void ) +{ + struct ldap_int_thread_pool_s *pool; + + while ((pool = LDAP_STAILQ_FIRST(&ldap_int_thread_pool_list)) != NULL) { + (ldap_pvt_thread_pool_destroy)(&pool, 0); /* ignore thr_debug macro */ + } + ldap_pvt_thread_mutex_destroy(&ldap_pvt_thread_pool_mutex); + ldap_pvt_thread_key_destroy( ldap_tpool_key ); + return(0); +} + + +/* Create a thread pool */ +int +ldap_pvt_thread_pool_init ( + ldap_pvt_thread_pool_t *tpool, + int max_threads, + int max_pending ) +{ + ldap_pvt_thread_pool_t pool; + int rc; + + /* multiple pools are currently not supported (ITS#4943) */ + assert(!ldap_int_has_thread_pool); + + if (! (0 <= max_threads && max_threads <= LDAP_MAXTHR)) + max_threads = 0; + if (! (1 <= max_pending && max_pending <= MAX_PENDING)) + max_pending = MAX_PENDING; + + *tpool = NULL; + pool = (ldap_pvt_thread_pool_t) LDAP_CALLOC(1, + sizeof(struct ldap_int_thread_pool_s)); + + if (pool == NULL) return(-1); + + rc = ldap_pvt_thread_mutex_init(&pool->ltp_mutex); + if (rc != 0) { +fail1: + LDAP_FREE(pool); + return(rc); + } + rc = ldap_pvt_thread_cond_init(&pool->ltp_cond); + if (rc != 0) { +fail2: + ldap_pvt_thread_mutex_destroy(&pool->ltp_mutex); + goto fail1; + } + rc = ldap_pvt_thread_cond_init(&pool->ltp_pcond); + if (rc != 0) { + ldap_pvt_thread_cond_destroy(&pool->ltp_cond); + goto fail2; + } + + ldap_int_has_thread_pool = 1; + + pool->ltp_max_count = max_threads; + SET_VARY_OPEN_COUNT(pool); + pool->ltp_max_pending = max_pending; + + LDAP_STAILQ_INIT(&pool->ltp_pending_list); + pool->ltp_work_list = &pool->ltp_pending_list; + LDAP_SLIST_INIT(&pool->ltp_free_list); + + ldap_pvt_thread_mutex_lock(&ldap_pvt_thread_pool_mutex); + LDAP_STAILQ_INSERT_TAIL(&ldap_int_thread_pool_list, pool, ltp_next); + ldap_pvt_thread_mutex_unlock(&ldap_pvt_thread_pool_mutex); + + /* Start no threads just yet. That can break if the process forks + * later, as slapd does in order to daemonize. On at least POSIX, + * only the forking thread would survive in the child. Yet fork() + * can't unlock/clean up other threads' locks and data structures, + * unless pthread_atfork() handlers have been set up to do so. + */ + + *tpool = pool; + return(0); +} + + +/* Submit a task to be performed by the thread pool */ +int +ldap_pvt_thread_pool_submit ( + ldap_pvt_thread_pool_t *tpool, + ldap_pvt_thread_start_t *start_routine, void *arg ) +{ + struct ldap_int_thread_pool_s *pool; + ldap_int_thread_task_t *task; + ldap_pvt_thread_t thr; + + if (tpool == NULL) + return(-1); + + pool = *tpool; + + if (pool == NULL) + return(-1); + + ldap_pvt_thread_mutex_lock(&pool->ltp_mutex); + + if (pool->ltp_pending_count >= pool->ltp_max_pending) + goto failed; + + task = LDAP_SLIST_FIRST(&pool->ltp_free_list); + if (task) { + LDAP_SLIST_REMOVE_HEAD(&pool->ltp_free_list, ltt_next.l); + } else { + task = (ldap_int_thread_task_t *) LDAP_MALLOC(sizeof(*task)); + if (task == NULL) + goto failed; + } + + task->ltt_start_routine = start_routine; + task->ltt_arg = arg; + + pool->ltp_pending_count++; + LDAP_STAILQ_INSERT_TAIL(&pool->ltp_pending_list, task, ltt_next.q); + + /* true if ltp_pause != 0 or we should open (create) a thread */ + if (pool->ltp_vary_open_count > 0 && + pool->ltp_open_count < pool->ltp_active_count+pool->ltp_pending_count) + { + if (pool->ltp_pause) + goto done; + + pool->ltp_starting++; + pool->ltp_open_count++; + SET_VARY_OPEN_COUNT(pool); + + if (0 != ldap_pvt_thread_create( + &thr, 1, ldap_int_thread_pool_wrapper, pool)) + { + /* couldn't create thread. back out of + * ltp_open_count and check for even worse things. + */ + pool->ltp_starting--; + pool->ltp_open_count--; + SET_VARY_OPEN_COUNT(pool); + + if (pool->ltp_open_count == 0) { + /* no open threads at all?!? + */ + ldap_int_thread_task_t *ptr; + + /* let pool_destroy know there are no more threads */ + ldap_pvt_thread_cond_signal(&pool->ltp_cond); + + LDAP_STAILQ_FOREACH(ptr, &pool->ltp_pending_list, ltt_next.q) + if (ptr == task) break; + if (ptr == task) { + /* no open threads, task not handled, so + * back out of ltp_pending_count, free the task, + * report the error. + */ + pool->ltp_pending_count--; + LDAP_STAILQ_REMOVE(&pool->ltp_pending_list, task, + ldap_int_thread_task_s, ltt_next.q); + LDAP_SLIST_INSERT_HEAD(&pool->ltp_free_list, task, + ltt_next.l); + goto failed; + } + } + /* there is another open thread, so this + * task will be handled eventually. + */ + } + } + ldap_pvt_thread_cond_signal(&pool->ltp_cond); + + done: + ldap_pvt_thread_mutex_unlock(&pool->ltp_mutex); + return(0); + + failed: + ldap_pvt_thread_mutex_unlock(&pool->ltp_mutex); + return(-1); +} + +static void * +no_task( void *ctx, void *arg ) +{ + return NULL; +} + +/* Cancel a pending task that was previously submitted. + * Return 1 if the task was successfully cancelled, 0 if + * not found, -1 for invalid parameters + */ +int +ldap_pvt_thread_pool_retract ( + ldap_pvt_thread_pool_t *tpool, + ldap_pvt_thread_start_t *start_routine, void *arg ) +{ + struct ldap_int_thread_pool_s *pool; + ldap_int_thread_task_t *task; + + if (tpool == NULL) + return(-1); + + pool = *tpool; + + if (pool == NULL) + return(-1); + + ldap_pvt_thread_mutex_lock(&pool->ltp_mutex); + LDAP_STAILQ_FOREACH(task, &pool->ltp_pending_list, ltt_next.q) + if (task->ltt_start_routine == start_routine && + task->ltt_arg == arg) { + /* Could LDAP_STAILQ_REMOVE the task, but that + * walks ltp_pending_list again to find it. + */ + task->ltt_start_routine = no_task; + task->ltt_arg = NULL; + break; + } + ldap_pvt_thread_mutex_unlock(&pool->ltp_mutex); + return task != NULL; +} + +/* Set max #threads. value <= 0 means max supported #threads (LDAP_MAXTHR) */ +int +ldap_pvt_thread_pool_maxthreads( + ldap_pvt_thread_pool_t *tpool, + int max_threads ) +{ + struct ldap_int_thread_pool_s *pool; + + if (! (0 <= max_threads && max_threads <= LDAP_MAXTHR)) + max_threads = 0; + + if (tpool == NULL) + return(-1); + + pool = *tpool; + + if (pool == NULL) + return(-1); + + ldap_pvt_thread_mutex_lock(&pool->ltp_mutex); + + pool->ltp_max_count = max_threads; + SET_VARY_OPEN_COUNT(pool); + + ldap_pvt_thread_mutex_unlock(&pool->ltp_mutex); + return(0); +} + +/* Inspect the pool */ +int +ldap_pvt_thread_pool_query( + ldap_pvt_thread_pool_t *tpool, + ldap_pvt_thread_pool_param_t param, + void *value ) +{ + struct ldap_int_thread_pool_s *pool; + int count = -1; + + if ( tpool == NULL || value == NULL ) { + return -1; + } + + pool = *tpool; + + if ( pool == NULL ) { + return 0; + } + + ldap_pvt_thread_mutex_lock(&pool->ltp_mutex); + switch ( param ) { + case LDAP_PVT_THREAD_POOL_PARAM_MAX: + count = pool->ltp_max_count; + break; + + case LDAP_PVT_THREAD_POOL_PARAM_MAX_PENDING: + count = pool->ltp_max_pending; + if (count < 0) + count = -count; + if (count == MAX_PENDING) + count = 0; + break; + + case LDAP_PVT_THREAD_POOL_PARAM_OPEN: + count = pool->ltp_open_count; + if (count < 0) + count = -count; + break; + + case LDAP_PVT_THREAD_POOL_PARAM_STARTING: + count = pool->ltp_starting; + break; + + case LDAP_PVT_THREAD_POOL_PARAM_ACTIVE: + count = pool->ltp_active_count; + break; + + case LDAP_PVT_THREAD_POOL_PARAM_PAUSING: + count = (pool->ltp_pause != 0); + break; + + case LDAP_PVT_THREAD_POOL_PARAM_PENDING: + count = pool->ltp_pending_count; + break; + + case LDAP_PVT_THREAD_POOL_PARAM_BACKLOAD: + count = pool->ltp_pending_count + pool->ltp_active_count; + break; + + case LDAP_PVT_THREAD_POOL_PARAM_ACTIVE_MAX: + break; + + case LDAP_PVT_THREAD_POOL_PARAM_PENDING_MAX: + break; + + case LDAP_PVT_THREAD_POOL_PARAM_BACKLOAD_MAX: + break; + + case LDAP_PVT_THREAD_POOL_PARAM_STATE: + *((char **)value) = + pool->ltp_pause ? "pausing" : + !pool->ltp_finishing ? "running" : + pool->ltp_pending_count ? "finishing" : "stopping"; + break; + + case LDAP_PVT_THREAD_POOL_PARAM_UNKNOWN: + break; + } + ldap_pvt_thread_mutex_unlock( &pool->ltp_mutex ); + + if ( count > -1 ) { + *((int *)value) = count; + } + + return ( count == -1 ? -1 : 0 ); +} + +/* + * true if pool is pausing; does not lock any mutex to check. + * 0 if not pause, 1 if pause, -1 if error or no pool. + */ +int +ldap_pvt_thread_pool_pausing( ldap_pvt_thread_pool_t *tpool ) +{ + int rc = -1; + struct ldap_int_thread_pool_s *pool; + + if ( tpool != NULL && (pool = *tpool) != NULL ) { + rc = (pool->ltp_pause != 0); + } + + return rc; +} + +/* + * wrapper for ldap_pvt_thread_pool_query(), left around + * for backwards compatibility + */ +int +ldap_pvt_thread_pool_backload ( ldap_pvt_thread_pool_t *tpool ) +{ + int rc, count; + + rc = ldap_pvt_thread_pool_query( tpool, + LDAP_PVT_THREAD_POOL_PARAM_BACKLOAD, (void *)&count ); + + if ( rc == 0 ) { + return count; + } + + return rc; +} + +/* Destroy the pool after making its threads finish */ +int +ldap_pvt_thread_pool_destroy ( ldap_pvt_thread_pool_t *tpool, int run_pending ) +{ + struct ldap_int_thread_pool_s *pool, *pptr; + ldap_int_thread_task_t *task; + + if (tpool == NULL) + return(-1); + + pool = *tpool; + + if (pool == NULL) return(-1); + + ldap_pvt_thread_mutex_lock(&ldap_pvt_thread_pool_mutex); + LDAP_STAILQ_FOREACH(pptr, &ldap_int_thread_pool_list, ltp_next) + if (pptr == pool) break; + if (pptr == pool) + LDAP_STAILQ_REMOVE(&ldap_int_thread_pool_list, pool, + ldap_int_thread_pool_s, ltp_next); + ldap_pvt_thread_mutex_unlock(&ldap_pvt_thread_pool_mutex); + + if (pool != pptr) return(-1); + + ldap_pvt_thread_mutex_lock(&pool->ltp_mutex); + + pool->ltp_finishing = 1; + SET_VARY_OPEN_COUNT(pool); + if (pool->ltp_max_pending > 0) + pool->ltp_max_pending = -pool->ltp_max_pending; + + if (!run_pending) { + while ((task = LDAP_STAILQ_FIRST(&pool->ltp_pending_list)) != NULL) { + LDAP_STAILQ_REMOVE_HEAD(&pool->ltp_pending_list, ltt_next.q); + LDAP_FREE(task); + } + pool->ltp_pending_count = 0; + } + + while (pool->ltp_open_count) { + if (!pool->ltp_pause) + ldap_pvt_thread_cond_broadcast(&pool->ltp_cond); + ldap_pvt_thread_cond_wait(&pool->ltp_cond, &pool->ltp_mutex); + } + + while ((task = LDAP_SLIST_FIRST(&pool->ltp_free_list)) != NULL) + { + LDAP_SLIST_REMOVE_HEAD(&pool->ltp_free_list, ltt_next.l); + LDAP_FREE(task); + } + + ldap_pvt_thread_mutex_unlock(&pool->ltp_mutex); + ldap_pvt_thread_cond_destroy(&pool->ltp_pcond); + ldap_pvt_thread_cond_destroy(&pool->ltp_cond); + ldap_pvt_thread_mutex_destroy(&pool->ltp_mutex); + LDAP_FREE(pool); + *tpool = NULL; + ldap_int_has_thread_pool = 0; + return(0); +} + +/* Thread loop. Accept and handle submitted tasks. */ +static void * +ldap_int_thread_pool_wrapper ( + void *xpool ) +{ + struct ldap_int_thread_pool_s *pool = xpool; + ldap_int_thread_task_t *task; + ldap_int_tpool_plist_t *work_list; + ldap_int_thread_userctx_t ctx, *kctx; + unsigned i, keyslot, hash; + + assert(pool != NULL); + + for ( i=0; i<MAXKEYS; i++ ) { + ctx.ltu_key[i].ltk_key = NULL; + } + + ctx.ltu_id = ldap_pvt_thread_self(); + TID_HASH(ctx.ltu_id, hash); + + ldap_pvt_thread_key_setdata( ldap_tpool_key, &ctx ); + + ldap_pvt_thread_mutex_lock(&pool->ltp_mutex); + + /* thread_keys[] is read-only when paused */ + while (pool->ltp_pause) + ldap_pvt_thread_cond_wait(&pool->ltp_cond, &pool->ltp_mutex); + + /* find a key slot to give this thread ID and store a + * pointer to our keys there; start at the thread ID + * itself (mod LDAP_MAXTHR) and look for an empty slot. + */ + ldap_pvt_thread_mutex_lock(&ldap_pvt_thread_pool_mutex); + for (keyslot = hash & (LDAP_MAXTHR-1); + (kctx = thread_keys[keyslot].ctx) && kctx != DELETED_THREAD_CTX; + keyslot = (keyslot+1) & (LDAP_MAXTHR-1)); + thread_keys[keyslot].ctx = &ctx; + ldap_pvt_thread_mutex_unlock(&ldap_pvt_thread_pool_mutex); + + pool->ltp_starting--; + pool->ltp_active_count++; + + for (;;) { + work_list = pool->ltp_work_list; /* help the compiler a bit */ + task = LDAP_STAILQ_FIRST(work_list); + if (task == NULL) { /* paused or no pending tasks */ + if (--(pool->ltp_active_count) < 2) { + /* Notify pool_pause it is the sole active thread. */ + ldap_pvt_thread_cond_signal(&pool->ltp_pcond); + } + + do { + if (pool->ltp_vary_open_count < 0) { + /* Not paused, and either finishing or too many + * threads running (can happen if ltp_max_count + * was reduced). Let this thread die. + */ + goto done; + } + + /* We could check an idle timer here, and let the + * thread die if it has been inactive for a while. + * Only die if there are other open threads (i.e., + * always have at least one thread open). + * The check should be like this: + * if (pool->ltp_open_count>1 && pool->ltp_starting==0) + * check timer, wait if ltp_pause, leave thread; + * + * Just use pthread_cond_timedwait() if we want to + * check idle time. + */ + ldap_pvt_thread_cond_wait(&pool->ltp_cond, &pool->ltp_mutex); + + work_list = pool->ltp_work_list; + task = LDAP_STAILQ_FIRST(work_list); + } while (task == NULL); + + pool->ltp_active_count++; + } + + LDAP_STAILQ_REMOVE_HEAD(work_list, ltt_next.q); + pool->ltp_pending_count--; + ldap_pvt_thread_mutex_unlock(&pool->ltp_mutex); + + task->ltt_start_routine(&ctx, task->ltt_arg); + + ldap_pvt_thread_mutex_lock(&pool->ltp_mutex); + LDAP_SLIST_INSERT_HEAD(&pool->ltp_free_list, task, ltt_next.l); + } + done: + + assert(!pool->ltp_pause); /* thread_keys writable, ltp_open_count >= 0 */ + + /* The ltp_mutex lock protects ctx->ltu_key from pool_purgekey() + * during this call, since it prevents new pauses. */ + ldap_pvt_thread_pool_context_reset(&ctx); + + ldap_pvt_thread_mutex_lock(&ldap_pvt_thread_pool_mutex); + thread_keys[keyslot].ctx = DELETED_THREAD_CTX; + ldap_pvt_thread_mutex_unlock(&ldap_pvt_thread_pool_mutex); + + pool->ltp_open_count--; + SET_VARY_OPEN_COUNT(pool); + /* let pool_destroy know we're all done */ + if (pool->ltp_open_count == 0) + ldap_pvt_thread_cond_signal(&pool->ltp_cond); + + ldap_pvt_thread_mutex_unlock(&pool->ltp_mutex); + + ldap_pvt_thread_exit(NULL); + return(NULL); +} + +/* Arguments > ltp_pause to handle_pause(,PAUSE_ARG()). arg=PAUSE_ARG + * ensures (arg-ltp_pause) sets GO_* at need and keeps DO_PAUSE/GO_*. + */ +#define GO_IDLE 8 +#define GO_UNIDLE 16 +#define CHECK_PAUSE 32 /* if ltp_pause: GO_IDLE; wait; GO_UNIDLE */ +#define DO_PAUSE 64 /* CHECK_PAUSE; pause the pool */ +#define PAUSE_ARG(a) \ + ((a) | ((a) & (GO_IDLE|GO_UNIDLE) ? GO_IDLE-1 : CHECK_PAUSE)) + +static int +handle_pause( ldap_pvt_thread_pool_t *tpool, int pause_type ) +{ + struct ldap_int_thread_pool_s *pool; + int ret = 0, pause, max_ltp_pause; + + if (tpool == NULL) + return(-1); + + pool = *tpool; + + if (pool == NULL) + return(0); + + if (pause_type == CHECK_PAUSE && !pool->ltp_pause) + return(0); + + /* Let pool_unidle() ignore requests for new pauses */ + max_ltp_pause = pause_type==PAUSE_ARG(GO_UNIDLE) ? WANT_PAUSE : NOT_PAUSED; + + ldap_pvt_thread_mutex_lock(&pool->ltp_mutex); + + pause = pool->ltp_pause; /* NOT_PAUSED, WANT_PAUSE or PAUSED */ + + /* If ltp_pause and not GO_IDLE|GO_UNIDLE: Set GO_IDLE,GO_UNIDLE */ + pause_type -= pause; + + if (pause_type & GO_IDLE) { + pool->ltp_pending_count++; + pool->ltp_active_count--; + if (pause && pool->ltp_active_count < 2) { + /* Tell the task waiting to DO_PAUSE it can proceed */ + ldap_pvt_thread_cond_signal(&pool->ltp_pcond); + } + } + + if (pause_type & GO_UNIDLE) { + /* Wait out pause if any, then cancel GO_IDLE */ + if (pause > max_ltp_pause) { + ret = 1; + do { + ldap_pvt_thread_cond_wait(&pool->ltp_cond, &pool->ltp_mutex); + } while (pool->ltp_pause > max_ltp_pause); + } + pool->ltp_pending_count--; + pool->ltp_active_count++; + } + + if (pause_type & DO_PAUSE) { + /* Tell everyone else to pause or finish, then await that */ + ret = 0; + assert(!pool->ltp_pause); + pool->ltp_pause = WANT_PAUSE; + /* Let ldap_pvt_thread_pool_submit() through to its ltp_pause test, + * and do not finish threads in ldap_pvt_thread_pool_wrapper() */ + pool->ltp_open_count = -pool->ltp_open_count; + SET_VARY_OPEN_COUNT(pool); + /* Hide pending tasks from ldap_pvt_thread_pool_wrapper() */ + pool->ltp_work_list = &empty_pending_list; + /* Wait for this task to become the sole active task */ + while (pool->ltp_active_count > 1) { + ldap_pvt_thread_cond_wait(&pool->ltp_pcond, &pool->ltp_mutex); + } + assert(pool->ltp_pause == WANT_PAUSE); + pool->ltp_pause = PAUSED; + } + + ldap_pvt_thread_mutex_unlock(&pool->ltp_mutex); + return(ret); +} + +/* Consider this task idle: It will not block pool_pause() in other tasks. */ +void +ldap_pvt_thread_pool_idle( ldap_pvt_thread_pool_t *tpool ) +{ + handle_pause(tpool, PAUSE_ARG(GO_IDLE)); +} + +/* Cancel pool_idle(). If the pool is paused, wait it out first. */ +void +ldap_pvt_thread_pool_unidle( ldap_pvt_thread_pool_t *tpool ) +{ + handle_pause(tpool, PAUSE_ARG(GO_UNIDLE)); +} + +/* + * If a pause was requested, wait for it. If several threads + * are waiting to pause, let through one or more pauses. + * The calling task must be active, not idle. + * Return 1 if we waited, 0 if not, -1 at parameter error. + */ +int +ldap_pvt_thread_pool_pausecheck( ldap_pvt_thread_pool_t *tpool ) +{ + return handle_pause(tpool, PAUSE_ARG(CHECK_PAUSE)); +} + +/* + * Pause the pool. The calling task must be active, not idle. + * Return when all other tasks are paused or idle. + */ +int +ldap_pvt_thread_pool_pause( ldap_pvt_thread_pool_t *tpool ) +{ + return handle_pause(tpool, PAUSE_ARG(DO_PAUSE)); +} + +/* End a pause */ +int +ldap_pvt_thread_pool_resume ( + ldap_pvt_thread_pool_t *tpool ) +{ + struct ldap_int_thread_pool_s *pool; + + if (tpool == NULL) + return(-1); + + pool = *tpool; + + if (pool == NULL) + return(0); + + ldap_pvt_thread_mutex_lock(&pool->ltp_mutex); + + assert(pool->ltp_pause == PAUSED); + pool->ltp_pause = 0; + if (pool->ltp_open_count <= 0) /* true when paused, but be paranoid */ + pool->ltp_open_count = -pool->ltp_open_count; + SET_VARY_OPEN_COUNT(pool); + pool->ltp_work_list = &pool->ltp_pending_list; + + ldap_pvt_thread_cond_broadcast(&pool->ltp_cond); + + ldap_pvt_thread_mutex_unlock(&pool->ltp_mutex); + return(0); +} + +/* + * Get the key's data and optionally free function in the given context. + */ +int ldap_pvt_thread_pool_getkey( + void *xctx, + void *key, + void **data, + ldap_pvt_thread_pool_keyfree_t **kfree ) +{ + ldap_int_thread_userctx_t *ctx = xctx; + int i; + + if ( !ctx || !key || !data ) return EINVAL; + + for ( i=0; i<MAXKEYS && ctx->ltu_key[i].ltk_key; i++ ) { + if ( ctx->ltu_key[i].ltk_key == key ) { + *data = ctx->ltu_key[i].ltk_data; + if ( kfree ) *kfree = ctx->ltu_key[i].ltk_free; + return 0; + } + } + return ENOENT; +} + +static void +clear_key_idx( ldap_int_thread_userctx_t *ctx, int i ) +{ + for ( ; i < MAXKEYS-1 && ctx->ltu_key[i+1].ltk_key; i++ ) + ctx->ltu_key[i] = ctx->ltu_key[i+1]; + ctx->ltu_key[i].ltk_key = NULL; +} + +/* + * Set or remove data for the key in the given context. + * key can be any unique pointer. + * kfree() is an optional function to free the data (but not the key): + * pool_context_reset() and pool_purgekey() call kfree(key, data), + * but pool_setkey() does not. For pool_setkey() it is the caller's + * responsibility to free any existing data with the same key. + * kfree() must not call functions taking a tpool argument. + */ +int ldap_pvt_thread_pool_setkey( + void *xctx, + void *key, + void *data, + ldap_pvt_thread_pool_keyfree_t *kfree, + void **olddatap, + ldap_pvt_thread_pool_keyfree_t **oldkfreep ) +{ + ldap_int_thread_userctx_t *ctx = xctx; + int i, found; + + if ( !ctx || !key ) return EINVAL; + + for ( i=found=0; i<MAXKEYS; i++ ) { + if ( ctx->ltu_key[i].ltk_key == key ) { + found = 1; + break; + } else if ( !ctx->ltu_key[i].ltk_key ) { + break; + } + } + + if ( olddatap ) { + if ( found ) { + *olddatap = ctx->ltu_key[i].ltk_data; + } else { + *olddatap = NULL; + } + } + + if ( oldkfreep ) { + if ( found ) { + *oldkfreep = ctx->ltu_key[i].ltk_free; + } else { + *oldkfreep = 0; + } + } + + if ( data || kfree ) { + if ( i>=MAXKEYS ) + return ENOMEM; + ctx->ltu_key[i].ltk_key = key; + ctx->ltu_key[i].ltk_data = data; + ctx->ltu_key[i].ltk_free = kfree; + } else if ( found ) { + clear_key_idx( ctx, i ); + } + + return 0; +} + +/* Free all elements with this key, no matter which thread they're in. + * May only be called while the pool is paused. + */ +void ldap_pvt_thread_pool_purgekey( void *key ) +{ + int i, j; + ldap_int_thread_userctx_t *ctx; + + assert ( key != NULL ); + + for ( i=0; i<LDAP_MAXTHR; i++ ) { + ctx = thread_keys[i].ctx; + if ( ctx && ctx != DELETED_THREAD_CTX ) { + for ( j=0; j<MAXKEYS && ctx->ltu_key[j].ltk_key; j++ ) { + if ( ctx->ltu_key[j].ltk_key == key ) { + if (ctx->ltu_key[j].ltk_free) + ctx->ltu_key[j].ltk_free( ctx->ltu_key[j].ltk_key, + ctx->ltu_key[j].ltk_data ); + clear_key_idx( ctx, j ); + break; + } + } + } + } +} + +/* + * Find the context of the current thread. + * This is necessary if the caller does not have access to the + * thread context handle (for example, a slapd plugin calling + * slapi_search_internal()). No doubt it is more efficient + * for the application to keep track of the thread context + * handles itself. + */ +void *ldap_pvt_thread_pool_context( ) +{ + void *ctx = NULL; + + ldap_pvt_thread_key_getdata( ldap_tpool_key, &ctx ); + return ctx ? ctx : (void *) &ldap_int_main_thrctx; +} + +/* + * Free the context's keys. + * Must not call functions taking a tpool argument (because this + * thread already holds ltp_mutex when called from pool_wrapper()). + */ +void ldap_pvt_thread_pool_context_reset( void *vctx ) +{ + ldap_int_thread_userctx_t *ctx = vctx; + int i; + + for ( i=MAXKEYS-1; i>=0; i--) { + if ( !ctx->ltu_key[i].ltk_key ) + continue; + if ( ctx->ltu_key[i].ltk_free ) + ctx->ltu_key[i].ltk_free( ctx->ltu_key[i].ltk_key, + ctx->ltu_key[i].ltk_data ); + ctx->ltu_key[i].ltk_key = NULL; + } +} + +ldap_pvt_thread_t ldap_pvt_thread_pool_tid( void *vctx ) +{ + ldap_int_thread_userctx_t *ctx = vctx; + + return ctx->ltu_id; +} +#endif /* LDAP_THREAD_HAVE_TPOOL */ |