sem_destroy - destroy an unnamed semaphore
int sem_destroy(sem_t *sem);
Link with -pthread.
sem_destroy() destroys the unnamed semaphore at the address pointed to by
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
Using a semaphore that has been destroyed produces undefined
results, until the semaphore has been reinitialized using
sem_destroy() returns 0 on success; on error, -1 is returned, and
errno is set to indicate the error.
For an explanation of the terms used in this section, see attributes(7).
- sem is not a valid semaphore.
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.
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