1 /* 2 * Copyright (C) 2004, 2007-2009 Internet Systems Consortium, Inc. ("ISC") 3 * Copyright (C) 1998-2001 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: mutex.h,v 1.22 2009/01/18 23:48:14 tbox Exp $ */ 19 20 #ifndef ISC_MUTEX_H 21 #define ISC_MUTEX_H 1 22 23 #include <isc/net.h> 24 #include <windows.h> 25 26 #include <isc/result.h> 27 28 typedef CRITICAL_SECTION isc_mutex_t; 29 30 /* 31 * This definition is here since some versions of WINBASE.H 32 * omits it for some reason. 33 */ 34 #if (_WIN32_WINNT < 0x0400) 35 WINBASEAPI BOOL WINAPI 36 TryEnterCriticalSection(LPCRITICAL_SECTION lpCriticalSection); 37 #endif /* _WIN32_WINNT < 0x0400 */ 38 39 #define isc_mutex_init(mp) \ 40 (InitializeCriticalSection((mp)), ISC_R_SUCCESS) 41 #define isc_mutex_lock(mp) \ 42 (EnterCriticalSection((mp)), ISC_R_SUCCESS) 43 #define isc_mutex_unlock(mp) \ 44 (LeaveCriticalSection((mp)), ISC_R_SUCCESS) 45 #define isc_mutex_trylock(mp) \ 46 (TryEnterCriticalSection((mp)) ? ISC_R_SUCCESS : ISC_R_LOCKBUSY) 47 #define isc_mutex_destroy(mp) \ 48 (DeleteCriticalSection((mp)), ISC_R_SUCCESS) 49 50 /* 51 * This is a placeholder for now since we are not keeping any mutex stats 52 */ 53 #define isc_mutex_stats(fp) do {} while (0) 54 55 #endif /* ISC_MUTEX_H */ 56