Current File : //proc/self/root/usr/src/node-v0.10.4/deps/uv/src/unix/thread.c
/* Copyright Joyent, Inc. and other Node contributors. All rights reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to
* deal in the Software without restriction, including without limitation the
* rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
* sell copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
* IN THE SOFTWARE.
*/
#include "uv.h"
#include "internal.h"
#include <pthread.h>
#include <assert.h>
#include <errno.h>
#if defined(__APPLE__) && defined(__MACH__)
#include <sys/time.h>
#endif /* defined(__APPLE__) && defined(__MACH__) */
#undef NANOSEC
#define NANOSEC ((uint64_t) 1e9)
int uv_thread_join(uv_thread_t *tid) {
if (pthread_join(*tid, NULL))
return -1;
else
return 0;
}
int uv_mutex_init(uv_mutex_t* mutex) {
#ifdef NDEBUG
if (pthread_mutex_init(mutex, NULL))
return -1;
else
return 0;
#else
pthread_mutexattr_t attr;
int r;
if (pthread_mutexattr_init(&attr))
abort();
if (pthread_mutexattr_settype(&attr, PTHREAD_MUTEX_ERRORCHECK))
abort();
r = pthread_mutex_init(mutex, &attr);
if (pthread_mutexattr_destroy(&attr))
abort();
return r ? -1 : 0;
#endif
}
void uv_mutex_destroy(uv_mutex_t* mutex) {
if (pthread_mutex_destroy(mutex))
abort();
}
void uv_mutex_lock(uv_mutex_t* mutex) {
if (pthread_mutex_lock(mutex))
abort();
}
int uv_mutex_trylock(uv_mutex_t* mutex) {
int r;
r = pthread_mutex_trylock(mutex);
if (r && r != EBUSY && r != EAGAIN)
abort();
if (r)
return -1;
else
return 0;
}
void uv_mutex_unlock(uv_mutex_t* mutex) {
if (pthread_mutex_unlock(mutex))
abort();
}
int uv_rwlock_init(uv_rwlock_t* rwlock) {
if (pthread_rwlock_init(rwlock, NULL))
return -1;
else
return 0;
}
void uv_rwlock_destroy(uv_rwlock_t* rwlock) {
if (pthread_rwlock_destroy(rwlock))
abort();
}
void uv_rwlock_rdlock(uv_rwlock_t* rwlock) {
if (pthread_rwlock_rdlock(rwlock))
abort();
}
int uv_rwlock_tryrdlock(uv_rwlock_t* rwlock) {
int r;
r = pthread_rwlock_tryrdlock(rwlock);
if (r && r != EBUSY && r != EAGAIN)
abort();
if (r)
return -1;
else
return 0;
}
void uv_rwlock_rdunlock(uv_rwlock_t* rwlock) {
if (pthread_rwlock_unlock(rwlock))
abort();
}
void uv_rwlock_wrlock(uv_rwlock_t* rwlock) {
if (pthread_rwlock_wrlock(rwlock))
abort();
}
int uv_rwlock_trywrlock(uv_rwlock_t* rwlock) {
int r;
r = pthread_rwlock_trywrlock(rwlock);
if (r && r != EBUSY && r != EAGAIN)
abort();
if (r)
return -1;
else
return 0;
}
void uv_rwlock_wrunlock(uv_rwlock_t* rwlock) {
if (pthread_rwlock_unlock(rwlock))
abort();
}
void uv_once(uv_once_t* guard, void (*callback)(void)) {
if (pthread_once(guard, callback))
abort();
}
#if defined(__APPLE__) && defined(__MACH__)
int uv_sem_init(uv_sem_t* sem, unsigned int value) {
if (semaphore_create(mach_task_self(), sem, SYNC_POLICY_FIFO, value))
return -1;
else
return 0;
}
void uv_sem_destroy(uv_sem_t* sem) {
if (semaphore_destroy(mach_task_self(), *sem))
abort();
}
void uv_sem_post(uv_sem_t* sem) {
if (semaphore_signal(*sem))
abort();
}
void uv_sem_wait(uv_sem_t* sem) {
int r;
do
r = semaphore_wait(*sem);
while (r == KERN_ABORTED);
if (r != KERN_SUCCESS)
abort();
}
int uv_sem_trywait(uv_sem_t* sem) {
mach_timespec_t interval;
interval.tv_sec = 0;
interval.tv_nsec = 0;
if (semaphore_timedwait(*sem, interval) == KERN_SUCCESS)
return 0;
else
return -1;
}
#else /* !(defined(__APPLE__) && defined(__MACH__)) */
int uv_sem_init(uv_sem_t* sem, unsigned int value) {
return sem_init(sem, 0, value);
}
void uv_sem_destroy(uv_sem_t* sem) {
if (sem_destroy(sem))
abort();
}
void uv_sem_post(uv_sem_t* sem) {
if (sem_post(sem))
abort();
}
void uv_sem_wait(uv_sem_t* sem) {
int r;
do
r = sem_wait(sem);
while (r == -1 && errno == EINTR);
if (r)
abort();
}
int uv_sem_trywait(uv_sem_t* sem) {
int r;
do
r = sem_trywait(sem);
while (r == -1 && errno == EINTR);
if (r && errno != EAGAIN)
abort();
return r;
}
#endif /* defined(__APPLE__) && defined(__MACH__) */
#if defined(__APPLE__) && defined(__MACH__)
int uv_cond_init(uv_cond_t* cond) {
if (pthread_cond_init(cond, NULL))
return -1;
else
return 0;
}
#else /* !(defined(__APPLE__) && defined(__MACH__)) */
int uv_cond_init(uv_cond_t* cond) {
pthread_condattr_t attr;
if (pthread_condattr_init(&attr))
return -1;
if (pthread_condattr_setclock(&attr, CLOCK_MONOTONIC))
goto error2;
if (pthread_cond_init(cond, &attr))
goto error2;
if (pthread_condattr_destroy(&attr))
goto error;
return 0;
error:
pthread_cond_destroy(cond);
error2:
pthread_condattr_destroy(&attr);
return -1;
}
#endif /* defined(__APPLE__) && defined(__MACH__) */
void uv_cond_destroy(uv_cond_t* cond) {
if (pthread_cond_destroy(cond))
abort();
}
void uv_cond_signal(uv_cond_t* cond) {
if (pthread_cond_signal(cond))
abort();
}
void uv_cond_broadcast(uv_cond_t* cond) {
if (pthread_cond_broadcast(cond))
abort();
}
void uv_cond_wait(uv_cond_t* cond, uv_mutex_t* mutex) {
if (pthread_cond_wait(cond, mutex))
abort();
}
int uv_cond_timedwait(uv_cond_t* cond, uv_mutex_t* mutex, uint64_t timeout) {
int r;
struct timespec ts;
#if defined(__APPLE__) && defined(__MACH__)
ts.tv_sec = timeout / NANOSEC;
ts.tv_nsec = timeout % NANOSEC;
r = pthread_cond_timedwait_relative_np(cond, mutex, &ts);
#else
timeout += uv__hrtime();
ts.tv_sec = timeout / NANOSEC;
ts.tv_nsec = timeout % NANOSEC;
r = pthread_cond_timedwait(cond, mutex, &ts);
#endif
if (r == 0)
return 0;
if (r == ETIMEDOUT)
return -1;
abort();
return -1; /* Satisfy the compiler. */
}
#if defined(__APPLE__) && defined(__MACH__)
int uv_barrier_init(uv_barrier_t* barrier, unsigned int count) {
barrier->n = count;
barrier->count = 0;
if (uv_mutex_init(&barrier->mutex))
return -1;
if (uv_sem_init(&barrier->turnstile1, 0))
goto error2;
if (uv_sem_init(&barrier->turnstile2, 1))
goto error;
return 0;
error:
uv_sem_destroy(&barrier->turnstile1);
error2:
uv_mutex_destroy(&barrier->mutex);
return -1;
}
void uv_barrier_destroy(uv_barrier_t* barrier) {
uv_sem_destroy(&barrier->turnstile2);
uv_sem_destroy(&barrier->turnstile1);
uv_mutex_destroy(&barrier->mutex);
}
void uv_barrier_wait(uv_barrier_t* barrier) {
uv_mutex_lock(&barrier->mutex);
if (++barrier->count == barrier->n) {
uv_sem_wait(&barrier->turnstile2);
uv_sem_post(&barrier->turnstile1);
}
uv_mutex_unlock(&barrier->mutex);
uv_sem_wait(&barrier->turnstile1);
uv_sem_post(&barrier->turnstile1);
uv_mutex_lock(&barrier->mutex);
if (--barrier->count == 0) {
uv_sem_wait(&barrier->turnstile1);
uv_sem_post(&barrier->turnstile2);
}
uv_mutex_unlock(&barrier->mutex);
uv_sem_wait(&barrier->turnstile2);
uv_sem_post(&barrier->turnstile2);
}
#else /* !(defined(__APPLE__) && defined(__MACH__)) */
int uv_barrier_init(uv_barrier_t* barrier, unsigned int count) {
if (pthread_barrier_init(barrier, NULL, count))
return -1;
else
return 0;
}
void uv_barrier_destroy(uv_barrier_t* barrier) {
if (pthread_barrier_destroy(barrier))
abort();
}
void uv_barrier_wait(uv_barrier_t* barrier) {
int r = pthread_barrier_wait(barrier);
if (r && r != PTHREAD_BARRIER_SERIAL_THREAD)
abort();
}
#endif /* defined(__APPLE__) && defined(__MACH__) */
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