/*
* Copyright (C) Internet Systems Consortium, Inc. ("ISC")
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, you can obtain one at https://mozilla.org/MPL/2.0/.
*
* See the COPYRIGHT file distributed with this work for additional
* information regarding copyright ownership.
*/
#ifndef ISC_ONCE_H
#define ISC_ONCE_H 1
/*! \file */
#include <pthread.h>
#include <isc/platform.h>
#include <isc/result.h>
typedef pthread_once_t isc_once_t;
#ifdef ISC_PLATFORM_BRACEPTHREADONCEINIT
/*!
* This accommodates systems that define PTHRAD_ONCE_INIT improperly.
*/
#define ISC_ONCE_INIT { PTHREAD_ONCE_INIT }
#else
/*!
* This is the usual case.
*/
#define ISC_ONCE_INIT PTHREAD_ONCE_INIT
#endif
/* XXX We could do fancier error handling... */
#define isc_once_do(op, f) \
((pthread_once((op), (f)) == 0) ? \
ISC_R_SUCCESS : ISC_R_UNEXPECTED)
#endif /* ISC_ONCE_H */