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PTHREAD_ONCE

PTHREAD_ONCE

Section: C Library Functions (3) Updated: LinuxThreads
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NAME

pthread_once - once-only initialization

 

SYNOPSIS

#include <pthread.h>

pthread_once_t once_control = PTHREAD_ONCE_INIT;

int pthread_once(pthread_once_t *once_control, void (*init_routine) (void));

 

DESCRIPTION

The purpose of pthread_once is to ensure that a piece of initialization code is executed at most once. The once_control argument points to a static or extern variable statically initialized to PTHREAD_ONCE_INIT.

The first time pthread_once is called with a given once_control argument, it calls init_routine with no argument and changes the value of the once_control variable to record that initialization has been performed. Subsequent calls to pthread_once with the same once_control argument do nothing.

 

RETURN VALUE

pthread_once always returns 0.

 

ERRORS

None.

 

AUTHOR

Xavier Leroy <Xavier.Leroy@inria.fr>


 

Index

NAME
SYNOPSIS
DESCRIPTION
RETURN VALUE
ERRORS
AUTHOR

This document was created by man2html, using the manual pages.
Time: 21:53:15 GMT, April 16, 2011