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).

STANDARDS

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)