linuXperts.org

SEM_DESTROY(3) Linux Programmer's Manual SEM_DESTROY(3) 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. SEE ALSO sem_init(3), sem_post(3), sem_wait(3), sem_overview(7) Linux 2006-03-25 SEM_DESTROY(3)