sem_acquire
sem_acquire
(PHP 4, PHP 5, PHP 7)
sem_acquire — Acquire a semaphore
Description
bool sem_acquire ( resource $sem_identifier [, bool $nowait = false ] )
sem_acquire() by default 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 b