mutex.h

来自「一个开源的NTP服务器客户端实现代码」· C头文件 代码 · 共 52 行

/*
 * Copyright (C) 1998-2001  Internet Software Consortium.
 *
 * Permission to use, copy, modify, and distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND INTERNET SOFTWARE CONSORTIUM
 * DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL
 * INTERNET SOFTWARE CONSORTIUM BE LIABLE FOR ANY SPECIAL, DIRECT,
 * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING
 * FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT,
 * NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION
 * WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */

/* $Id: mutex.h,v 1.16 2001/07/09 21:06:27 gson Exp $ */

#ifndef ISC_MUTEX_H
#define ISC_MUTEX_H 1

#include <isc/net.h>
#include <windows.h>

#include <isc/result.h>

typedef CRITICAL_SECTION isc_mutex_t;

/* This definition is here since WINBASE.H omits it for some reason */

WINBASEAPI BOOL WINAPI
TryEnterCriticalSection(LPCRITICAL_SECTION lpCriticalSection);

#define isc_mutex_init(mp) \
	(InitializeCriticalSection((mp)), ISC_R_SUCCESS)
#define isc_mutex_lock(mp) \
	(EnterCriticalSection((mp)), ISC_R_SUCCESS)
#define isc_mutex_unlock(mp) \
	(LeaveCriticalSection((mp)), ISC_R_SUCCESS)
#define isc_mutex_trylock(mp) \
	(TryEnterCriticalSection((mp)) ? ISC_R_SUCCESS : ISC_R_LOCKBUSY)
#define isc_mutex_destroy(mp) \
	(DeleteCriticalSection((mp)), ISC_R_SUCCESS)

/*
 * This is a placeholder for now since we are not keeping any mutex stats
 */
#define isc_mutex_stats(fp)

#endif /* ISC_MUTEX_H */