2 * Copyright 2009-2012 Niels Provos and Nick Mathewson
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
7 * 1. Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
12 * 3. The name of the author may not be used to endorse or promote products
13 * derived from this software without specific prior written permission.
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26 #include "event2/event-config.h"
28 /* With glibc we need to define this to get PTHREAD_MUTEX_RECURSIVE. */
35 #include "event2/thread.h"
39 #include "mm-internal.h"
40 #include "evthread-internal.h"
42 static pthread_mutexattr_t attr_recursive
;
45 evthread_posix_lock_alloc(unsigned locktype
)
47 pthread_mutexattr_t
*attr
= NULL
;
48 pthread_mutex_t
*lock
= mm_malloc(sizeof(pthread_mutex_t
));
51 if (locktype
& EVTHREAD_LOCKTYPE_RECURSIVE
)
52 attr
= &attr_recursive
;
53 if (pthread_mutex_init(lock
, attr
)) {
61 evthread_posix_lock_free(void *_lock
, unsigned locktype
)
63 pthread_mutex_t
*lock
= _lock
;
64 pthread_mutex_destroy(lock
);
69 evthread_posix_lock(unsigned mode
, void *_lock
)
71 pthread_mutex_t
*lock
= _lock
;
72 if (mode
& EVTHREAD_TRY
)
73 return pthread_mutex_trylock(lock
);
75 return pthread_mutex_lock(lock
);
79 evthread_posix_unlock(unsigned mode
, void *_lock
)
81 pthread_mutex_t
*lock
= _lock
;
82 return pthread_mutex_unlock(lock
);
86 evthread_posix_get_id(void)
90 #if _EVENT_SIZEOF_PTHREAD_T > _EVENT_SIZEOF_LONG
96 #if _EVENT_SIZEOF_PTHREAD_T < _EVENT_SIZEOF_LONG
97 memset(&r
, 0, sizeof(r
));
99 r
.thr
= pthread_self();
100 return (unsigned long)r
.id
;
104 evthread_posix_cond_alloc(unsigned condflags
)
106 pthread_cond_t
*cond
= mm_malloc(sizeof(pthread_cond_t
));
109 if (pthread_cond_init(cond
, NULL
)) {
117 evthread_posix_cond_free(void *_cond
)
119 pthread_cond_t
*cond
= _cond
;
120 pthread_cond_destroy(cond
);
125 evthread_posix_cond_signal(void *_cond
, int broadcast
)
127 pthread_cond_t
*cond
= _cond
;
130 r
= pthread_cond_broadcast(cond
);
132 r
= pthread_cond_signal(cond
);
137 evthread_posix_cond_wait(void *_cond
, void *_lock
, const struct timeval
*tv
)
140 pthread_cond_t
*cond
= _cond
;
141 pthread_mutex_t
*lock
= _lock
;
144 struct timeval now
, abstime
;
146 evutil_gettimeofday(&now
, NULL
);
147 evutil_timeradd(&now
, tv
, &abstime
);
148 ts
.tv_sec
= abstime
.tv_sec
;
149 ts
.tv_nsec
= abstime
.tv_usec
*1000;
150 r
= pthread_cond_timedwait(cond
, lock
, &ts
);
158 r
= pthread_cond_wait(cond
, lock
);
164 evthread_use_pthreads(void)
166 struct evthread_lock_callbacks cbs
= {
167 EVTHREAD_LOCK_API_VERSION
,
168 EVTHREAD_LOCKTYPE_RECURSIVE
,
169 evthread_posix_lock_alloc
,
170 evthread_posix_lock_free
,
172 evthread_posix_unlock
174 struct evthread_condition_callbacks cond_cbs
= {
175 EVTHREAD_CONDITION_API_VERSION
,
176 evthread_posix_cond_alloc
,
177 evthread_posix_cond_free
,
178 evthread_posix_cond_signal
,
179 evthread_posix_cond_wait
181 /* Set ourselves up to get recursive locks. */
182 if (pthread_mutexattr_init(&attr_recursive
))
184 if (pthread_mutexattr_settype(&attr_recursive
, PTHREAD_MUTEX_RECURSIVE
))
187 evthread_set_lock_callbacks(&cbs
);
188 evthread_set_condition_callbacks(&cond_cbs
);
189 evthread_set_id_callback(evthread_posix_get_id
);