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/* 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
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