sem_acquire
(PHP 4, PHP 5, PHP 7)
sem_acquire — Acquire a semaphore
Description
$sem_identifier
[, bool $nowait = FALSE
] ) : boolsem_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
-
sem_identifier -
sem_identifieris a semaphore resource, obtained from sem_get(). -
nowait -
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.
English translation
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Document created the 30/01/2003, last modified the 26/10/2018
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References
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