michael@0: /*
michael@0:  * Copyright 2013 Google Inc.
michael@0:  *
michael@0:  * Use of this source code is governed by a BSD-style license that can be
michael@0:  * found in the LICENSE file.
michael@0:  */
michael@0: 
michael@0: #ifndef SkMutex_win_DEFINED
michael@0: #define SkMutex_win_DEFINED
michael@0: 
michael@0: /** Windows CriticalSection based mutex. */
michael@0: 
michael@0: #ifndef WIN32_LEAN_AND_MEAN
michael@0: #  define WIN32_LEAN_AND_MEAN
michael@0: #  define WIN32_IS_MEAN_WAS_LOCALLY_DEFINED
michael@0: #endif
michael@0: #ifndef NOMINMAX
michael@0: #  define NOMINMAX
michael@0: #  define NOMINMAX_WAS_LOCALLY_DEFINED
michael@0: #endif
michael@0: #
michael@0: #include <windows.h>
michael@0: #
michael@0: #ifdef WIN32_IS_MEAN_WAS_LOCALLY_DEFINED
michael@0: #  undef WIN32_IS_MEAN_WAS_LOCALLY_DEFINED
michael@0: #  undef WIN32_LEAN_AND_MEAN
michael@0: #endif
michael@0: #ifdef NOMINMAX_WAS_LOCALLY_DEFINED
michael@0: #  undef NOMINMAX_WAS_LOCALLY_DEFINED
michael@0: #  undef NOMINMAX
michael@0: #endif
michael@0: 
michael@0: // On Windows, SkBaseMutex and SkMutex are the same thing,
michael@0: // we can't easily get rid of static initializers.
michael@0: class SkMutex {
michael@0: public:
michael@0:     SkMutex() {
michael@0:         InitializeCriticalSection(&fStorage);
michael@0:     }
michael@0: 
michael@0:     ~SkMutex() {
michael@0:         DeleteCriticalSection(&fStorage);
michael@0:     }
michael@0: 
michael@0:     void acquire() {
michael@0:         EnterCriticalSection(&fStorage);
michael@0:     }
michael@0: 
michael@0:     void release() {
michael@0:         LeaveCriticalSection(&fStorage);
michael@0:     }
michael@0: 
michael@0: private:
michael@0:     SkMutex(const SkMutex&);
michael@0:     SkMutex& operator=(const SkMutex&);
michael@0: 
michael@0:     CRITICAL_SECTION fStorage;
michael@0: };
michael@0: 
michael@0: typedef SkMutex SkBaseMutex;
michael@0: 
michael@0: // Windows currently provides no documented means of POD initializing a CRITICAL_SECTION.
michael@0: #define SK_DECLARE_STATIC_MUTEX(name) static SkBaseMutex name
michael@0: #define SK_DECLARE_GLOBAL_MUTEX(name) SkBaseMutex name
michael@0: 
michael@0: #endif