1 /* $NetBSD: mutex.h,v 1.7 2014/12/10 04:38:01 christos Exp $ */ 2 3 /* 4 * Copyright (C) 2004, 2007-2009 Internet Systems Consortium, Inc. ("ISC") 5 * Copyright (C) 1998-2001 Internet Software Consortium. 6 * 7 * Permission to use, copy, modify, and/or distribute this software for any 8 * purpose with or without fee is hereby granted, provided that the above 9 * copyright notice and this permission notice appear in all copies. 10 * 11 * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH 12 * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY 13 * AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT, 14 * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM 15 * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE 16 * OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR 17 * PERFORMANCE OF THIS SOFTWARE. 18 */ 19 20 /* Id: mutex.h,v 1.22 2009/01/18 23:48:14 tbox Exp */ 21 22 #ifndef ISC_MUTEX_H 23 #define ISC_MUTEX_H 1 24 25 #include <isc/net.h> 26 #include <windows.h> 27 28 #include <isc/result.h> 29 30 typedef CRITICAL_SECTION isc_mutex_t; 31 32 /* 33 * This definition is here since some versions of WINBASE.H 34 * omits it for some reason. 35 */ 36 #if (_WIN32_WINNT < 0x0400) 37 WINBASEAPI BOOL WINAPI 38 TryEnterCriticalSection(LPCRITICAL_SECTION lpCriticalSection); 39 #endif /* _WIN32_WINNT < 0x0400 */ 40 41 #define isc_mutex_init(mp) \ 42 (InitializeCriticalSection((mp)), ISC_R_SUCCESS) 43 #define isc_mutex_lock(mp) \ 44 (EnterCriticalSection((mp)), ISC_R_SUCCESS) 45 #define isc_mutex_unlock(mp) \ 46 (LeaveCriticalSection((mp)), ISC_R_SUCCESS) 47 #define isc_mutex_trylock(mp) \ 48 (TryEnterCriticalSection((mp)) ? ISC_R_SUCCESS : ISC_R_LOCKBUSY) 49 #define isc_mutex_destroy(mp) \ 50 (DeleteCriticalSection((mp)), ISC_R_SUCCESS) 51 52 /* 53 * This is a placeholder for now since we are not keeping any mutex stats 54 */ 55 #define isc_mutex_stats(fp) do {} while (0) 56 57 #endif /* ISC_MUTEX_H */ 58