Linux 2.6 - man page for sem_destroy (linux section 3)
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SEM_DESTROY(3) Linux Programmer's Manual SEM_DESTROY(3)
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 sem.
Only a semaphore that has been initialized by sem_init(3) should be destroyed using
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).
sem_destroy() returns 0 on success; on error, -1 is returned, and errno is set to indicate
EINVAL 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 imple-
sem_init(3), sem_post(3), sem_wait(3), sem_overview(7)
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Linux 2012-05-13 SEM_DESTROY(3)
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