diff options
Diffstat (limited to 'fluent-bit/lib/monkey/mk_core/deps/libevent/select.c')
| -rw-r--r-- | fluent-bit/lib/monkey/mk_core/deps/libevent/select.c | 346 |
1 files changed, 0 insertions, 346 deletions
diff --git a/fluent-bit/lib/monkey/mk_core/deps/libevent/select.c b/fluent-bit/lib/monkey/mk_core/deps/libevent/select.c deleted file mode 100644 index 8ae53cc11..000000000 --- a/fluent-bit/lib/monkey/mk_core/deps/libevent/select.c +++ /dev/null @@ -1,346 +0,0 @@ -/* $OpenBSD: select.c,v 1.2 2002/06/25 15:50:15 mickey Exp $ */ - -/* - * Copyright 2000-2007 Niels Provos <provos@citi.umich.edu> - * Copyright 2007-2012 Niels Provos and Nick Mathewson - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * 3. The name of the author may not be used to endorse or promote products - * derived from this software without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR - * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES - * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. - * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, - * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT - * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, - * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY - * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT - * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF - * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. - */ -#include "event2/event-config.h" -#include "evconfig-private.h" - -#ifdef EVENT__HAVE_SELECT - -#ifdef __APPLE__ -/* Apple wants us to define this if we might ever pass more than - * FD_SETSIZE bits to select(). */ -#define _DARWIN_UNLIMITED_SELECT -#endif - -#include <sys/types.h> -#ifdef EVENT__HAVE_SYS_TIME_H -#include <sys/time.h> -#endif -#ifdef EVENT__HAVE_SYS_SELECT_H -#include <sys/select.h> -#endif -#include <sys/queue.h> -#include <signal.h> -#include <stdio.h> -#include <stdlib.h> -#include <string.h> -#include <unistd.h> -#include <errno.h> - -#include "event-internal.h" -#include "evsignal-internal.h" -#include "event2/thread.h" -#include "evthread-internal.h" -#include "log-internal.h" -#include "evmap-internal.h" - -#ifndef EVENT__HAVE_FD_MASK -/* This type is mandatory, but Android doesn't define it. */ -typedef unsigned long fd_mask; -#endif - -#ifndef NFDBITS -#define NFDBITS (sizeof(fd_mask)*8) -#endif - -/* Divide positive x by y, rounding up. */ -#define DIV_ROUNDUP(x, y) (((x)+((y)-1))/(y)) - -/* How many bytes to allocate for N fds? */ -#define SELECT_ALLOC_SIZE(n) \ - (DIV_ROUNDUP(n, NFDBITS) * sizeof(fd_mask)) - -struct selectop { - int event_fds; /* Highest fd in fd set */ - int event_fdsz; - int resize_out_sets; - fd_set *event_readset_in; - fd_set *event_writeset_in; - fd_set *event_readset_out; - fd_set *event_writeset_out; -}; - -static void *select_init(struct event_base *); -static int select_add(struct event_base *, int, short old, short events, void*); -static int select_del(struct event_base *, int, short old, short events, void*); -static int select_dispatch(struct event_base *, struct timeval *); -static void select_dealloc(struct event_base *); - -const struct eventop selectops = { - "select", - select_init, - select_add, - select_del, - select_dispatch, - select_dealloc, - 0, /* doesn't need reinit. */ - EV_FEATURE_FDS, - 0, -}; - -static int select_resize(struct selectop *sop, int fdsz); -static void select_free_selectop(struct selectop *sop); - -static void * -select_init(struct event_base *base) -{ - struct selectop *sop; - - if (!(sop = mm_calloc(1, sizeof(struct selectop)))) - return (NULL); - - if (select_resize(sop, SELECT_ALLOC_SIZE(32 + 1))) { - select_free_selectop(sop); - return (NULL); - } - - evsig_init_(base); - - evutil_weakrand_seed_(&base->weakrand_seed, 0); - - return (sop); -} - -#ifdef CHECK_INVARIANTS -static void -check_selectop(struct selectop *sop) -{ - /* nothing to be done here */ -} -#else -#define check_selectop(sop) do { (void) sop; } while (0) -#endif - -static int -select_dispatch(struct event_base *base, struct timeval *tv) -{ - int res=0, i, j, nfds; - struct selectop *sop = base->evbase; - - check_selectop(sop); - if (sop->resize_out_sets) { - fd_set *readset_out=NULL, *writeset_out=NULL; - size_t sz = sop->event_fdsz; - if (!(readset_out = mm_realloc(sop->event_readset_out, sz))) - return (-1); - sop->event_readset_out = readset_out; - if (!(writeset_out = mm_realloc(sop->event_writeset_out, sz))) { - /* We don't free readset_out here, since it was - * already successfully reallocated. The next time - * we call select_dispatch, the realloc will be a - * no-op. */ - return (-1); - } - sop->event_writeset_out = writeset_out; - sop->resize_out_sets = 0; - } - - memcpy(sop->event_readset_out, sop->event_readset_in, - sop->event_fdsz); - memcpy(sop->event_writeset_out, sop->event_writeset_in, - sop->event_fdsz); - - nfds = sop->event_fds+1; - - EVBASE_RELEASE_LOCK(base, th_base_lock); - - res = select(nfds, sop->event_readset_out, - sop->event_writeset_out, NULL, tv); - - EVBASE_ACQUIRE_LOCK(base, th_base_lock); - - check_selectop(sop); - - if (res == -1) { - if (errno != EINTR) { - event_warn("select"); - return (-1); - } - - return (0); - } - - event_debug(("%s: select reports %d", __func__, res)); - - check_selectop(sop); - i = evutil_weakrand_range_(&base->weakrand_seed, nfds); - for (j = 0; j < nfds; ++j) { - if (++i >= nfds) - i = 0; - res = 0; - if (FD_ISSET(i, sop->event_readset_out)) - res |= EV_READ; - if (FD_ISSET(i, sop->event_writeset_out)) - res |= EV_WRITE; - - if (res == 0) - continue; - - evmap_io_active_(base, i, res); - } - check_selectop(sop); - - return (0); -} - -static int -select_resize(struct selectop *sop, int fdsz) -{ - fd_set *readset_in = NULL; - fd_set *writeset_in = NULL; - - if (sop->event_readset_in) - check_selectop(sop); - - if ((readset_in = mm_realloc(sop->event_readset_in, fdsz)) == NULL) - goto error; - sop->event_readset_in = readset_in; - if ((writeset_in = mm_realloc(sop->event_writeset_in, fdsz)) == NULL) { - /* Note that this will leave event_readset_in expanded. - * That's okay; we wouldn't want to free it, since that would - * change the semantics of select_resize from "expand the - * readset_in and writeset_in, or return -1" to "expand the - * *set_in members, or trash them and return -1." - */ - goto error; - } - sop->event_writeset_in = writeset_in; - sop->resize_out_sets = 1; - - memset((char *)sop->event_readset_in + sop->event_fdsz, 0, - fdsz - sop->event_fdsz); - memset((char *)sop->event_writeset_in + sop->event_fdsz, 0, - fdsz - sop->event_fdsz); - - sop->event_fdsz = fdsz; - check_selectop(sop); - - return (0); - - error: - event_warn("malloc"); - return (-1); -} - - -static int -select_add(struct event_base *base, int fd, short old, short events, void *p) -{ - struct selectop *sop = base->evbase; - (void) p; - - EVUTIL_ASSERT((events & EV_SIGNAL) == 0); - check_selectop(sop); - /* - * Keep track of the highest fd, so that we can calculate the size - * of the fd_sets for select(2) - */ - if (sop->event_fds < fd) { - int fdsz = sop->event_fdsz; - - if (fdsz < (int)sizeof(fd_mask)) - fdsz = (int)sizeof(fd_mask); - - /* In theory we should worry about overflow here. In - * reality, though, the highest fd on a unixy system will - * not overflow here. XXXX */ - while (fdsz < (int) SELECT_ALLOC_SIZE(fd + 1)) - fdsz *= 2; - - if (fdsz != sop->event_fdsz) { - if (select_resize(sop, fdsz)) { - check_selectop(sop); - return (-1); - } - } - - sop->event_fds = fd; - } - - if (events & EV_READ) - FD_SET(fd, sop->event_readset_in); - if (events & EV_WRITE) - FD_SET(fd, sop->event_writeset_in); - check_selectop(sop); - - return (0); -} - -/* - * Nothing to be done here. - */ - -static int -select_del(struct event_base *base, int fd, short old, short events, void *p) -{ - struct selectop *sop = base->evbase; - (void)p; - - EVUTIL_ASSERT((events & EV_SIGNAL) == 0); - check_selectop(sop); - - if (sop->event_fds < fd) { - check_selectop(sop); - return (0); - } - - if (events & EV_READ) - FD_CLR(fd, sop->event_readset_in); - - if (events & EV_WRITE) - FD_CLR(fd, sop->event_writeset_in); - - check_selectop(sop); - return (0); -} - -static void -select_free_selectop(struct selectop *sop) -{ - if (sop->event_readset_in) - mm_free(sop->event_readset_in); - if (sop->event_writeset_in) - mm_free(sop->event_writeset_in); - if (sop->event_readset_out) - mm_free(sop->event_readset_out); - if (sop->event_writeset_out) - mm_free(sop->event_writeset_out); - - memset(sop, 0, sizeof(struct selectop)); - mm_free(sop); -} - -static void -select_dealloc(struct event_base *base) -{ - evsig_dealloc_(base); - - select_free_selectop(base->evbase); -} - -#endif /* EVENT__HAVE_SELECT */ |