/* $NetBSD: once.h,v 1.6 2020/05/25 20:47:22 christos Exp $ */ /* * Copyright (C) 2004, 2005, 2007 Internet Systems Consortium, Inc. ("ISC") * Copyright (C) 1999-2001 Internet Software Consortium. * * Permission to use, copy, modify, and/or 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 ISC DISCLAIMS ALL WARRANTIES WITH * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY * AND FITNESS. IN NO EVENT SHALL ISC 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. */ /* Id: once.h,v 1.13 2007/06/19 23:47:18 tbox Exp */ #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 accomodates 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 */ |