/* $OpenBSD: rthread_once.c,v 1.1 2011/12/21 23:59:03 guenther Exp $ */ /* * Copyright (c) 2004,2005 Ted Unangst <tedu@openbsd.org> * All Rights Reserved. * * Permission to use, copy, modify, and distribute this software for any * purpose with or without fee is hereby granted, provided that the above * copyright notice and this permission notice appear in all copies. * * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */ #include <pthread.h> int pthread_once(pthread_once_t *once_control, void (*init_routine)(void)) { pthread_mutex_lock(&once_control->mutex); if (once_control->state == PTHREAD_NEEDS_INIT) { init_routine(); once_control->state = PTHREAD_DONE_INIT; } pthread_mutex_unlock(&once_control->mutex); return (0); }