sem_close (3)

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.

ATTRIBUTES

For an explanation of the terms used in this section, see attributes(7).
Interface Attribute Value
sem_close () Thread safety MT-Safe
 

CONFORMING TO

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)

Information

Source
Linux kernel
OS/version
Linux
Source updated
September 15, 2017
Page created
February 9, 2018
Page generated
December 2, 2018