2 * Copyright (C) 2004, 2007-2009 Internet Systems Consortium, Inc. ("ISC")
3 * Copyright (C) 1998-2001 Internet Software Consortium.
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.
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.
18 /* $Id: mutex.h,v 1.22 2009/01/18 23:48:14 tbox Exp $ */
26 #include <isc/result.h>
28 typedef CRITICAL_SECTION isc_mutex_t;
31 * This definition is here since some versions of WINBASE.H
32 * omits it for some reason.
34 #if (_WIN32_WINNT < 0x0400)
35 WINBASEAPI BOOL WINAPI
36 TryEnterCriticalSection(LPCRITICAL_SECTION lpCriticalSection);
37 #endif /* _WIN32_WINNT < 0x0400 */
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)
51 * This is a placeholder for now since we are not keeping any mutex stats
53 #define isc_mutex_stats(fp) do {} while (0)
55 #endif /* ISC_MUTEX_H */