|SEM_DESTROY(3)||FreeBSD Library Functions Manual||SEM_DESTROY(3)|
NAMEsem_destroy — destroy an unnamed semaphore
LIBRARYStandard C Library (libc, -lc)
SYNOPSIS#include < semaphore.h>
sem_destroy( sem_t *sem);
DESCRIPTIONThe sem_destroy() function destroys the unnamed semaphore pointed to by sem. After a successful call to sem_destroy(), sem is unusable until re-initialized by another call to sem_init(3).
RETURN VALUESThe sem_destroy() function returns the value 0 if successful; otherwise the value -1 is returned and the global variable errno is set to indicate the error.
ERRORSThe sem_destroy() function will fail if:
- [ EINVAL]
- The sem argument points to an invalid semaphore.
- [ EBUSY]
- There are currently threads blocked on the semaphore that sem points to.
STANDARDSThe sem_destroy() function conforms to ISO/IEC 9945-1:1996 (“POSIX.1”).
POSIX does not define the behavior of sem_destroy() if called while there are threads blocked on sem, but this implementation is guaranteed to return -1 and set errno to EBUSY if there are threads blocked on sem.
|February 15, 2000||FreeBSD|