81 lines
2.8 KiB
C++
81 lines
2.8 KiB
C++
// Copyright 2008 Google LLC
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//
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are
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// met:
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//
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// * Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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// * Redistributions in binary form must reproduce the above
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// copyright notice, this list of conditions and the following disclaimer
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// in the documentation and/or other materials provided with the
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// distribution.
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// * Neither the name of Google LLC nor the names of its
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// contributors may be used to endorse or promote products derived from
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// this software without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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#ifndef CLIENT_WINDOWS_COMMON_AUTO_CRITICAL_SECTION_H__
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#define CLIENT_WINDOWS_COMMON_AUTO_CRITICAL_SECTION_H__
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#include <windows.h>
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namespace google_breakpad {
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// Automatically enters the critical section in the constructor and leaves
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// the critical section in the destructor.
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class AutoCriticalSection {
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public:
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// Creates a new instance with the given critical section object
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// and enters the critical section immediately.
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explicit AutoCriticalSection(CRITICAL_SECTION* cs) : cs_(cs), taken_(false) {
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assert(cs_);
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Acquire();
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}
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// Destructor: leaves the critical section.
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~AutoCriticalSection() {
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if (taken_) {
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Release();
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}
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}
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// Enters the critical section. Recursive Acquire() calls are not allowed.
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void Acquire() {
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assert(!taken_);
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EnterCriticalSection(cs_);
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taken_ = true;
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}
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// Leaves the critical section. The caller should not call Release() unless
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// the critical seciton has been entered already.
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void Release() {
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assert(taken_);
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taken_ = false;
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LeaveCriticalSection(cs_);
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}
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private:
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// Disable copy ctor and operator=.
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AutoCriticalSection(const AutoCriticalSection&);
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AutoCriticalSection& operator=(const AutoCriticalSection&);
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CRITICAL_SECTION* cs_;
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bool taken_;
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};
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} // namespace google_breakpad
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#endif // CLIENT_WINDOWS_COMMON_AUTO_CRITICAL_SECTION_H__
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