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# sem_release

(PHP 3>= 3.0.6, PHP 4 )

sem_release -- Release a semaphore

## Description

bool sem_release ( int sem_identifier)

Returns: `TRUE` on success, `FALSE` on error.

sem_release() releases the semaphore if it is currently acquired by the calling process, otherwise a warning is generated.

After releasing the semaphore, sem_acquire() may be called to re-acquire it.

See also: sem_get() and sem_acquire().

> Note: This function does not work on Windows systems.

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