sem_acquire
(PHP 4, PHP 5, PHP 7, PHP 8)
sem_acquire — Acquire a semaphore
Description
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 be
generated.
Parameters
semaphore-
semaphore is a semaphore
obtained from sem_get().
non_blocking-
Specifies if the process shouldn't wait for the semaphore to be acquired.
If set to true, the call will return
false immediately if a semaphore cannot be immediately
acquired.
Return Values
Returns true on success or false on failure.
msg_stat_queue
Semaphore Functions