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NAME | SYNOPSIS | DESCRIPTION | RETURN VALUE | ERRORS | ATTRIBUTES | CONFORMING TO | NOTES | SEE ALSO | COLOPHON |
SEM_CLOSE(3) Linux Programmer's Manual SEM_CLOSE(3)
sem_close - close a named semaphore
#include <semaphore.h>
int sem_close(sem_t *sem);
Link with -pthread.
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)
This page is part of release 4.12 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/.
Linux 2015-07-23 SEM_CLOSE(3)
Pages that refer to this page: sem_open(3), sem_overview(7)