sem_close(3)               Library Functions Manual               sem_close(3)

NAME
       sem_close - close a named semaphore

LIBRARY
       POSIX threads library (libpthread, -lpthread)

SYNOPSIS
       #include <semaphore.h>

       int sem_close(sem_t *sem);

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 |
       +--------------------------------------------+---------------+---------+
STANDARDS
       POSIX.1-2008.

HISTORY
       POSIX.1-2001.

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)

Linux man-pages 6.7               2023-10-31                      sem_close(3)