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.
sem is not a valid semaphore.
For an explanation of the terms used in this section, see attributes(7).
| Interface | Attribute | Value |
| Thread safety | MT-Safe |
POSIX.1-2008.
POSIX.1-2001.
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)