NAME | SYNOPSIS | DESCRIPTION | RETURN VALUE | ERRORS | ATTRIBUTES | CONFORMING TO | NOTES | SEE ALSO | COLOPHON

SEM_CLOSE(3)              Linux Programmer's Manual             SEM_CLOSE(3)

NAME         top

       sem_close - close a named semaphore

SYNOPSIS         top

       #include <semaphore.h>

       int sem_close(sem_t *sem);

       Link with -pthread.

DESCRIPTION         top

       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         top

       On success sem_close() returns 0; on error, -1 is returned, with
       errno set to indicate the error.

ERRORS         top

       EINVAL sem is not a valid semaphore.

ATTRIBUTES         top

       For an explanation of the terms used in this section, see
       attributes(7).

       ┌────────────┬───────────────┬─────────┐
       │Interface   Attribute     Value   │
       ├────────────┼───────────────┼─────────┤
       │sem_close() │ Thread safety │ MT-Safe │
       └────────────┴───────────────┴─────────┘

CONFORMING TO         top

       POSIX.1-2001, POSIX.1-2008.

NOTES         top

       All open named semaphores are automatically closed on process
       termination, or upon execve(2).

SEE ALSO         top

       sem_getvalue(3), sem_open(3), sem_post(3), sem_unlink(3),
       sem_wait(3), sem_overview(7)

COLOPHON         top

       This page is part of release 4.08 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)