SEM_CLOSE
Section: Linux Programmer's Manual (3)
Updated: 2020-08-13
Page Index
NAME
sem_close - close a named semaphore
SYNOPSIS
#include <semaphore.h>
int sem_close(sem_t *sem);
Link with -pthread.
DESCRIPTION
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.
RETURN VALUE
On success
sem_close()
returns 0; on error, -1 is returned, with
errno
set to indicate the error.
ERRORS
- EINVAL
-
sem
is not a valid semaphore.
ATTRIBUTES
For an explanation of the terms used in this section, see
attributes(7).
| Interface | Attribute | Value
|
|
sem_close()
| Thread safety | MT-Safe
|
CONFORMING TO
POSIX.1-2001, POSIX.1-2008.
NOTES
All open named semaphores are automatically closed on process
termination, or upon
execve(2).
SEE ALSO
sem_getvalue(3),
sem_open(3),
sem_post(3),
sem_unlink(3),
sem_wait(3),
sem_overview(7)
COLOPHON
This page is part of release 5.10 of the Linux
man-pages
project.
A description of the project,
information about reporting bugs,
and the latest version of this page,
can be found at
https://www.kernel.org/doc/man-pages/.