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Diffstat (limited to 'toolkit/crashreporter/google-breakpad/src/client/windows/common/auto_critical_section.h')
-rw-r--r-- | toolkit/crashreporter/google-breakpad/src/client/windows/common/auto_critical_section.h | 81 |
1 files changed, 81 insertions, 0 deletions
diff --git a/toolkit/crashreporter/google-breakpad/src/client/windows/common/auto_critical_section.h b/toolkit/crashreporter/google-breakpad/src/client/windows/common/auto_critical_section.h new file mode 100644 index 000000000..3fd4b9b7e --- /dev/null +++ b/toolkit/crashreporter/google-breakpad/src/client/windows/common/auto_critical_section.h @@ -0,0 +1,81 @@ +// Copyright (c) 2008, Google Inc. +// All rights reserved. +// +// Redistribution and use in source and binary forms, with or without +// modification, are permitted provided that the following conditions are +// met: +// +// * Redistributions of source code must retain the above copyright +// notice, this list of conditions and the following disclaimer. +// * 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. +// * Neither the name of Google Inc. nor the names of its +// contributors may be used to endorse or promote products derived from +// this software without specific prior written permission. +// +// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS +// "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 COPYRIGHT +// OWNER OR CONTRIBUTORS 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 CLIENT_WINDOWS_COMMON_AUTO_CRITICAL_SECTION_H__ +#define CLIENT_WINDOWS_COMMON_AUTO_CRITICAL_SECTION_H__ + +#include <windows.h> + +namespace google_breakpad { + +// Automatically enters the critical section in the constructor and leaves +// the critical section in the destructor. +class AutoCriticalSection { + public: + // Creates a new instance with the given critical section object + // and enters the critical section immediately. + explicit AutoCriticalSection(CRITICAL_SECTION* cs) : cs_(cs), taken_(false) { + assert(cs_); + Acquire(); + } + + // Destructor: leaves the critical section. + ~AutoCriticalSection() { + if (taken_) { + Release(); + } + } + + // Enters the critical section. Recursive Acquire() calls are not allowed. + void Acquire() { + assert(!taken_); + EnterCriticalSection(cs_); + taken_ = true; + } + + // Leaves the critical section. The caller should not call Release() unless + // the critical seciton has been entered already. + void Release() { + assert(taken_); + taken_ = false; + LeaveCriticalSection(cs_); + } + + private: + // Disable copy ctor and operator=. + AutoCriticalSection(const AutoCriticalSection&); + AutoCriticalSection& operator=(const AutoCriticalSection&); + + CRITICAL_SECTION* cs_; + bool taken_; +}; + +} // namespace google_breakpad + +#endif // CLIENT_WINDOWS_COMMON_AUTO_CRITICAL_SECTION_H__ |