SIMPLE SOLUTIONS

SEM_CLOSE(3) - man page online | library functions

Close a named semaphore.

Chapter
2015-07-23
SEM_CLOSE(3)                        Linux Programmer's Manual                        SEM_CLOSE(3)

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 4.04 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 http://www.kernel.org/doc/man-pages/.
Linux 2015-07-23 SEM_CLOSE(3)
This manual Reference Other manuals
sem_close(3) referred by sem_open(3) | sem_overview(7)
refer to attributes(7) | execve(2) | sem_getvalue(3) | sem_open(3) | sem_overview(7) | sem_post(3) | sem_unlink(3) | sem_wait(3)