sem_destroy(3RT) Realtime Library Functions sem_destroy(3RT)NAMEsem_destroy - destroy an unnamed semaphore
SYNOPSIS
cc [ flag... ] file... -lrt [ library... ]
#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(3RT)
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(3RT).
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 │Standard │
├─────────────────────────────┼─────────────────────────────┤
│MT-Level │MT-Safe │
└─────────────────────────────┴─────────────────────────────┘
SEE ALSOsem_init(3RT), sem_open(3RT), attributes(5), standards(5)SunOS 5.10 28 Jun 2002 sem_destroy(3RT)
