sem_close - close a named semaphore
POSIX threads library (
libpthread,
-lpthread)
#include <semaphore.h>
int sem_close(sem_t *sem);
sem_close() closes the named semaphore referred to by
sem,
allowing any resources that the system has allocated to the calling process
for this semaphore to be freed.
On success
sem_close() returns 0; on error, -1 is returned, with
errno set to indicate the error.
- EINVAL
-
sem is not a valid semaphore.
For an explanation of the terms used in this section, see
attributes(7).
| Interface |
Attribute |
Value |
| sem_close () |
Thread safety |
MT-Safe |
POSIX.1-2001, POSIX.1-2008.
All open named semaphores are automatically closed on process termination, or
upon
execve(2).
sem_getvalue(3),
sem_open(3),
sem_post(3),
sem_unlink(3),
sem_wait(3),
sem_overview(7)