1135446Strhodes/* 2193149Sdougb * Copyright (C) 2004, 2007 Internet Systems Consortium, Inc. ("ISC") 3135446Strhodes * Copyright (C) 2000, 2001 Internet Software Consortium. 4135446Strhodes * 5193149Sdougb * Permission to use, copy, modify, and/or distribute this software for any 6135446Strhodes * purpose with or without fee is hereby granted, provided that the above 7135446Strhodes * copyright notice and this permission notice appear in all copies. 8135446Strhodes * 9135446Strhodes * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH 10135446Strhodes * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY 11135446Strhodes * AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT, 12135446Strhodes * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM 13135446Strhodes * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE 14135446Strhodes * OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR 15135446Strhodes * PERFORMANCE OF THIS SOFTWARE. 16135446Strhodes */ 17135446Strhodes 18234010Sdougb/* $Id: condition.h,v 1.6 2007/06/19 23:47:18 tbox Exp $ */ 19135446Strhodes 20135446Strhodes/* 21135446Strhodes * This provides a limited subset of the isc_condition_t 22135446Strhodes * functionality for use by single-threaded programs that 23135446Strhodes * need to block waiting for events. Only a single 24135446Strhodes * call to isc_condition_wait() may be blocked at any given 25135446Strhodes * time, and the _waituntil and _broadcast functions are not 26135446Strhodes * supported. This is intended primarily for use by the omapi 27135446Strhodes * library, and may go away once omapi goes away. Use for 28135446Strhodes * other purposes is strongly discouraged. 29135446Strhodes */ 30135446Strhodes 31135446Strhodes#ifndef ISC_CONDITION_H 32135446Strhodes#define ISC_CONDITION_H 1 33135446Strhodes 34135446Strhodes#include <isc/mutex.h> 35135446Strhodes 36135446Strhodestypedef int isc_condition_t; 37135446Strhodes 38135446Strhodesisc_result_t isc__nothread_wait_hack(isc_condition_t *cp, isc_mutex_t *mp); 39135446Strhodesisc_result_t isc__nothread_signal_hack(isc_condition_t *cp); 40135446Strhodes 41135446Strhodes#define isc_condition_init(cp) \ 42135446Strhodes (*(cp) = 0, ISC_R_SUCCESS) 43135446Strhodes 44135446Strhodes#define isc_condition_wait(cp, mp) \ 45135446Strhodes isc__nothread_wait_hack(cp, mp) 46135446Strhodes 47135446Strhodes#define isc_condition_waituntil(cp, mp, tp) \ 48135446Strhodes ((void)(cp), (void)(mp), (void)(tp), ISC_R_NOTIMPLEMENTED) 49135446Strhodes 50135446Strhodes#define isc_condition_signal(cp) \ 51135446Strhodes isc__nothread_signal_hack(cp) 52135446Strhodes 53135446Strhodes#define isc_condition_broadcast(cp) \ 54135446Strhodes ((void)(cp), ISC_R_NOTIMPLEMENTED) 55135446Strhodes 56135446Strhodes#define isc_condition_destroy(cp) \ 57135446Strhodes (*(cp) == 0 ? (*(cp) = -1, ISC_R_SUCCESS) : ISC_R_UNEXPECTED) 58135446Strhodes 59135446Strhodes#endif /* ISC_CONDITION_H */ 60