00001 /* 00002 * Copyright (C) 2004, 2007, 2015 Internet Systems Consortium, Inc. ("ISC") 00003 * Copyright (C) 2000, 2001 Internet Software Consortium. 00004 * 00005 * Permission to use, copy, modify, and/or distribute this software for any 00006 * purpose with or without fee is hereby granted, provided that the above 00007 * copyright notice and this permission notice appear in all copies. 00008 * 00009 * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH 00010 * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY 00011 * AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT, 00012 * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM 00013 * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE 00014 * OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR 00015 * PERFORMANCE OF THIS SOFTWARE. 00016 */ 00017 00018 #ifndef ISC_MUTEX_H 00019 #define ISC_MUTEX_H 1 00020 00021 #include <isc/result.h> /* for ISC_R_ codes */ 00022 00023 typedef int isc_mutex_t; 00024 00025 #define isc_mutex_init(mp) \ 00026 (*(mp) = 0, ISC_R_SUCCESS) 00027 #define isc_mutex_lock(mp) \ 00028 ((*(mp))++ == 0 ? ISC_R_SUCCESS : ISC_R_UNEXPECTED) 00029 #define isc_mutex_unlock(mp) \ 00030 (--(*(mp)) == 0 ? ISC_R_SUCCESS : ISC_R_UNEXPECTED) 00031 #define isc_mutex_trylock(mp) \ 00032 (*(mp) == 0 ? ((*(mp))++, ISC_R_SUCCESS) : ISC_R_LOCKBUSY) 00033 #define isc_mutex_destroy(mp) \ 00034 (*(mp) == 0 ? (*(mp) = -1, ISC_R_SUCCESS) : ISC_R_UNEXPECTED) 00035 #define isc_mutex_stats(fp) 00036 00037 #endif /* ISC_MUTEX_H */