NAME
sem_destroy - destroy an unnamed semaphore
SYNOPSIS
#include <semaphore.h>
I int sem_destroy(sem_t * sem );
DESCRIPTION
R sem_destroy ()
destroys the unnamed semaphore at the address pointed to by
R sem .
Only a semaphore that has been initialized by
sem_init(3)
should be destroyed using
R sem_destroy ().
Destroying a semaphore that other processes or threads are
currently blocked on (in
sem_wait(3))
produces undefined behavior.
Using a semaphore that has been destroyed produces undefined results,
until the semaphore has been reinitialized using
sem_init(3).
RETURN VALUE
R sem_destroy ()
returns 0 on success;
on error, -1 is returned, and
errno
is set to indicate the error.
ERRORS
EINVAL
sem
is not a valid semaphore.
CONFORMING TO
POSIX.1-2001.
NOTES
An unnamed semaphore should be destroyed with
R sem_destroy ()
before the memory in which it is located is deallocated.
Failure to do this can result in resource leaks on some implementations.
SEE ALSO
ČLÁNKY DO MAILU