Acquire a semaphore msg_stat_queue sem_get Semaphore Functions PHP Manual sem_acquire (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 maximum number of semaphore to be exceeded. After processing a request, any semaphores acquired by the process but not explicitly released will be released automatically and a warning will be generated. Parameters sem_identifier sem_identifier is a semaphore resource, obtained from sem_get(). Return Values Returns TRUE on success or FALSE on failure. See Also sem_get() sem_release() msg_stat_queue sem_get Semaphore Functions PHP Manual
