SEM_DESTROY(3C)SEM_DESTROY(3C)NAMEsem_destroy - destroy an unnamed semaphore
SYNOPSIS
#include <semaphore.h>
int sem_destroy(sem_t *sem);
DESCRIPTION
The sem_destroy() function is used to destroy the unnamed semaphore
indicated by sem. Only a semaphore that was created using sem_init(3C)
may be destroyed using sem_destroy(); the effect of calling
sem_destroy() with a named semaphore is undefined. The effect of subse‐
quent use of the semaphore sem is undefined until sem is re-initialized
by another call to sem_init(3C).
It is safe to destroy an initialised semaphore upon which no threads
are currently blocked. The effect of destroying a semaphore upon which
other threads are currently blocked is undefined.
RETURN VALUES
If successful, sem_destroy() returns 0, otherwise it returns −1 and
sets errno to indicate the error.
ERRORS
The sem_destroy() function will fail if:
EINVAL
The sem argument is not a valid semaphore.
The sem_destroy() function may fail if:
EBUSY
There are currently processes (or LWPs or threads) blocked on
the semaphore.
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
┌────────────────────┬───────────────────┐
│ATTRIBUTE TYPE │ ATTRIBUTE VALUE │
├────────────────────┼───────────────────┤
│Interface Stability │ Committed │
├────────────────────┼───────────────────┤
│MT-Level │ MT-Safe │
├────────────────────┼───────────────────┤
│Standard │ See standards(5). │
└────────────────────┴───────────────────┘
SEE ALSOsem_init(3C), sem_open(3C), attributes(5), standards(5)
Feb 5, 2008 SEM_DESTROY(3C)
