sem_acquire
(PHP 3>= 3.0.6, PHP 4 , PHP 5)
sem_acquire -- Acquire a semaphore
Description
bool
sem_acquire ( resource sem_identifier)
sem_acquire() blocks (if necessary) until the semaphore can be acquired. A process attempting to acquire a semaphore which it has already acquired will block forever if acquiring the semaphore would cause its max_acquire value to be exceeded.
Возвращает TRUE в случае успешного завершения, FALSE в случае возникновения ошибки.
After processing a request, any semaphores acquired by the process but not explicitly released will be released automatically and a warning will be generated.
Смотрите также: sem_get() and sem_release().