Destroying the Semaphore State

Use sem_destroy(3RT) to destroy any state that is associated with the unnamed semaphore pointed to by sem.

sem_destroy Syntax

int sem_destroy(sem_t *sem);

#include <semaphore.h>

sem_t sem;
int ret;

ret = sem_destroy(&sem); /* the semaphore is destroyed */

The space for storing the semaphore is not freed.

sem_destroy Return Values

sem_destroy() returns zero after completing successfully. Any other return value indicates that an error occurred. When the following condition occurs, the function fails and returns the corresponding value.

EINVAL

Description:

sem points to an illegal address.