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/*
* Copyright 2013 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#ifndef SkMutex_win_DEFINED
#define SkMutex_win_DEFINED
/** Windows CriticalSection based mutex. */
#ifndef WIN32_LEAN_AND_MEAN
# define WIN32_LEAN_AND_MEAN
# define WIN32_IS_MEAN_WAS_LOCALLY_DEFINED
#endif
#ifndef NOMINMAX
# define NOMINMAX
# define NOMINMAX_WAS_LOCALLY_DEFINED
#endif
#
#include <windows.h>
#
#ifdef WIN32_IS_MEAN_WAS_LOCALLY_DEFINED
# undef WIN32_IS_MEAN_WAS_LOCALLY_DEFINED
# undef WIN32_LEAN_AND_MEAN
#endif
#ifdef NOMINMAX_WAS_LOCALLY_DEFINED
# undef NOMINMAX_WAS_LOCALLY_DEFINED
# undef NOMINMAX
#endif
// TODO: this exists because SK_DECLARE_STATIC_ONCE in methods is currently
// relying on a compiler bug which allows the '=' to work.
// All use of SK_DECLARE_STATIC_ONCE in methods is unsafe, and must be removed.
// To find these cases, make SkMutex's copy and assignement private directly.
class SkNoncopyableMutex {
public:
SkNoncopyableMutex() { }
private:
SkNoncopyableMutex(const SkNoncopyableMutex&);
SkNoncopyableMutex& operator=(const SkNoncopyableMutex&);
};
// On Windows, SkBaseMutex and SkMutex are the same thing,
// we can't easily get rid of static initializers.
class SkMutex : SkNoncopyableMutex {
public:
SkMutex() {
InitializeCriticalSection(&fStorage);
}
~SkMutex() {
DeleteCriticalSection(&fStorage);
}
void acquire() {
EnterCriticalSection(&fStorage);
}
void release() {
LeaveCriticalSection(&fStorage);
}
private:
CRITICAL_SECTION fStorage;
};
typedef SkMutex SkBaseMutex;
// Windows currently provides no documented means of POD initializing a CRITICAL_SECTION.
#define SK_DECLARE_STATIC_MUTEX(name) static SkBaseMutex name
#define SK_DECLARE_GLOBAL_MUTEX(name) SkBaseMutex name
#endif
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