sem_close(3) — Linux manual page

sem_close(3)            Library Functions Manual            sem_close(3)

NAME         top

       sem_close - close a named semaphore

LIBRARY         top

       POSIX threads library (libpthread, -lpthread)

SYNOPSIS         top

       #include <semaphore.h>

       int sem_close(sem_t *sem);

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

STANDARDS         top

       POSIX.1-2008.

HISTORY         top

       POSIX.1-2001.

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

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Linux man-pages 6.9.1          2024-05-02                   sem_close(3)

Pages that refer to this page: sem_open(3),  sem_overview(7)

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