1 /* 2 * Copyright (C) 2004, 2007 Internet Systems Consortium, Inc. ("ISC") 3 * Copyright (C) 2000, 2001 Internet Software Consortium. 4 * 5 * Permission to use, copy, modify, and/or distribute this software for any 6 * purpose with or without fee is hereby granted, provided that the above 7 * copyright notice and this permission notice appear in all copies. 8 * 9 * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH 10 * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY 11 * AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT, 12 * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM 13 * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE 14 * OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR 15 * PERFORMANCE OF THIS SOFTWARE. 16 */ 17 18 /* $Id: condition.h,v 1.6 2007/06/19 23:47:18 tbox Exp $ */ 19 20 /* 21 * This provides a limited subset of the isc_condition_t 22 * functionality for use by single-threaded programs that 23 * need to block waiting for events. Only a single 24 * call to isc_condition_wait() may be blocked at any given 25 * time, and the _waituntil and _broadcast functions are not 26 * supported. This is intended primarily for use by the omapi 27 * library, and may go away once omapi goes away. Use for 28 * other purposes is strongly discouraged. 29 */ 30 31 #ifndef ISC_CONDITION_H 32 #define ISC_CONDITION_H 1 33 34 #include <isc/mutex.h> 35 36 typedef int isc_condition_t; 37 38 isc_result_t isc__nothread_wait_hack(isc_condition_t *cp, isc_mutex_t *mp); 39 isc_result_t isc__nothread_signal_hack(isc_condition_t *cp); 40 41 #define isc_condition_init(cp) \ 42 (*(cp) = 0, ISC_R_SUCCESS) 43 44 #define isc_condition_wait(cp, mp) \ 45 isc__nothread_wait_hack(cp, mp) 46 47 #define isc_condition_waituntil(cp, mp, tp) \ 48 ((void)(cp), (void)(mp), (void)(tp), ISC_R_NOTIMPLEMENTED) 49 50 #define isc_condition_signal(cp) \ 51 isc__nothread_signal_hack(cp) 52 53 #define isc_condition_broadcast(cp) \ 54 ((void)(cp), ISC_R_NOTIMPLEMENTED) 55 56 #define isc_condition_destroy(cp) \ 57 (*(cp) == 0 ? (*(cp) = -1, ISC_R_SUCCESS) : ISC_R_UNEXPECTED) 58 59 #endif /* ISC_CONDITION_H */ 60