SEM_DESTROY

Section: Linux Programmer's Manual (3)
Updated: 2006-03-25
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NAME

sem_destroy - destroy an unnamed semaphore

SYNOPSIS


#include <semaphore.h>



int sem_destroy(sem_t *sem);

DESCRIPTION

sem_destroy() destroys the unnamed semaphore at the address pointed to by sem.

Only a semaphore that has been initialized by sem_init(3) should be destroyed using sem_destroy().

Destroying a semaphore that other processes or threads are currently blocked on (in sem_wait(3)) produces undefined behavior.

Using a semaphore that has been destroyed produces undefined results, until the semaphore has been reinitialized using sem_init(3).

RETURN VALUE

sem_destroy() returns 0 on success; on error, -1 is returned, and errno is set to indicate the error.

ERRORS

EINVAL: sem is not a valid semaphore.

CONFORMING TO

POSIX.1-2001.

NOTES

An unnamed semaphore should be destroyed with sem_destroy() before the memory in which it is located is deallocated. Failure to do this can result in resource leaks on some implementations.

This document was created by man2html, using the manual pages.
Time: 22:15:24 GMT, February 02, 2008