Manpage of SEM_CLOSE

SEM_CLOSE

Section: Linux Programmer's Manual (3)
Updated: 2015-07-23
Index
 

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 errnoset to indicate the error.  

ERRORS

EINVAL
semis not a valid semaphore.
 

ATTRIBUTES

For an explanation of the terms used in this section, see attributes(7).
InterfaceAttributeValue
sem_close() Thread safetyMT-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)


 

Index

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

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