extern "C" int pthread_mutex_lock_timeout_np(pthread_mutex_t* mutex_interface, unsigned ms) {
timespec ts;
timespec_from_ms(ts, ms);
timespec abs_timeout;
absolute_timespec_from_timespec(abs_timeout, ts, CLOCK_MONOTONIC);
int error = __pthread_mutex_lock_with_timeout(__get_internal_mutex(mutex_interface),
false, &abs_timeout);
if (error == ETIMEDOUT) {
error = EBUSY;
}
return error;
}
int pthread_mutex_lock(pthread_mutex_t* mutex_interface) {
pthread_mutex_internal_t* mutex = __get_internal_mutex(mutex_interface);
uint16_t old_state = atomic_load_explicit(&mutex->state, memory_order_relaxed);
uint16_t mtype = (old_state & MUTEX_TYPE_MASK);
uint16_t shared = (old_state & MUTEX_SHARED_MASK);
// Avoid slowing down fast path of normal mutex lock operation.
if (__predict_true(mtype == MUTEX_TYPE_BITS_NORMAL)) {
if (__predict_true(__pthread_normal_mutex_trylock(mutex, shared) == 0)) {
return 0;
}
}
return __pthread_mutex_lock_with_timeout(mutex, NULL, 0);
}
extern "C" int pthread_mutex_lock_timeout_np(pthread_mutex_t* mutex_interface, unsigned ms) {
timespec abs_timeout;
clock_gettime(CLOCK_MONOTONIC, &abs_timeout);
abs_timeout.tv_sec += ms / 1000;
abs_timeout.tv_nsec += (ms % 1000) * 1000000;
if (abs_timeout.tv_nsec >= NS_PER_S) {
abs_timeout.tv_sec++;
abs_timeout.tv_nsec -= NS_PER_S;
}
int error = __pthread_mutex_lock_with_timeout(__get_internal_mutex(mutex_interface),
&abs_timeout, CLOCK_MONOTONIC);
if (error == ETIMEDOUT) {
error = EBUSY;
}
return error;
}
int pthread_mutex_lock(pthread_mutex_t* mutex_interface) {
#if !defined(__LP64__)
// Some apps depend on being able to pass NULL as a mutex and get EINVAL
// back. Don't need to worry about it for LP64 since the ABI is brand new,
// but keep compatibility for LP32. http://b/19995172.
if (mutex_interface == NULL) {
return EINVAL;
}
#endif
pthread_mutex_internal_t* mutex = __get_internal_mutex(mutex_interface);
uint16_t old_state = atomic_load_explicit(&mutex->state, memory_order_relaxed);
uint16_t mtype = (old_state & MUTEX_TYPE_MASK);
uint16_t shared = (old_state & MUTEX_SHARED_MASK);
// Avoid slowing down fast path of normal mutex lock operation.
if (__predict_true(mtype == MUTEX_TYPE_BITS_NORMAL)) {
if (__predict_true(__pthread_normal_mutex_trylock(mutex, shared) == 0)) {
return 0;
}
}
return __pthread_mutex_lock_with_timeout(mutex, false, nullptr);
}
int pthread_mutex_timedlock(pthread_mutex_t* mutex_interface, const timespec* abs_timeout) {
return __pthread_mutex_lock_with_timeout(__get_internal_mutex(mutex_interface),
true, abs_timeout);
}
