SEM_CLOSE(3) - man page online | library functions

Close a named semaphore.

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 │ └────────────┴───────────────┴─────────┘
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
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)