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SEM_CLOSE

Section: Linux Programmer's Manual (3)
Updated: 2012-05-13
Index Return to Main Contents
 

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.
 

CONFORMING TO

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)  

COLOPHON

This page is part of release 3.81 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 http://www.kernel.org/doc/man-pages/.


 

Index

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


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