/* * libjingle * Copyright 2004--2005, Google Inc. * * Redistribution and use in source and binary forms, with or without  * modification, are permitted provided that the following conditions are met: * *  1. Redistributions of source code must retain the above copyright notice,  *     this list of conditions and the following disclaimer. *  2. Redistributions in binary form must reproduce the above copyright notice, *     this list of conditions and the following disclaimer in the documentation *     and/or other materials provided with the distribution. *  3. The name of the author may not be used to endorse or promote products  *     derived from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR  * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF  * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */#ifndef _criticalsection_h_#define _criticalsection_h_#include "win32.h"#ifdef _DEBUG#define CS_TRACK_OWNER 1#endif  // _DEBUG#if CS_TRACK_OWNER#define TRACK_OWNER(x) x#else  // !CS_TRACK_OWNER#define TRACK_OWNER(x)#endif  // !CS_TRACK_OWNERnamespace cricket {class CriticalSection {public:  CriticalSection() {    InitializeCriticalSection(&crit_);    // Windows docs say 0 is not a valid thread id    TRACK_OWNER(thread_ = 0);  }  ~CriticalSection() {    DeleteCriticalSection(&crit_);  }  void Enter() {    EnterCriticalSection(&crit_);    TRACK_OWNER(thread_ = GetCurrentThreadId());  }  void Leave() {    TRACK_OWNER(thread_ = 0);    LeaveCriticalSection(&crit_);  }#if CS_TRACK_OWNER  bool CurrentThreadIsOwner() const { return thread_ == GetCurrentThreadId(); }#endif  // CS_TRACK_OWNERprivate:  CRITICAL_SECTION crit_;  TRACK_OWNER(DWORD thread_);  // The section's owning thread id};// CritScope, for serializing exection through a scopeclass CritScope {public:  CritScope(CriticalSection *pcrit) {    pcrit_ = pcrit;    pcrit_->Enter();  }  ~CritScope() {    pcrit_->Leave();  }private:  CriticalSection *pcrit_;};} // namespace cricket#endif // _criticalsection_h_