sem_destroy(3RT) Realtime Library Functions sem_destroy(3RT)
NAME
sem_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 subsequent 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 ALSO
sem_init(3RT), sem_open(3RT), attributes(5), standards(5)
SunOS 5.10 28 Jun 2002 sem_destroy(3RT)
