Upstream version 5.34.92.0
[platform/framework/web/crosswalk.git] / src / third_party / skia / src / ports / SkMutex_win.h
1 /*
2  * Copyright 2013 Google Inc.
3  *
4  * Use of this source code is governed by a BSD-style license that can be
5  * found in the LICENSE file.
6  */
7
8 #ifndef SkMutex_win_DEFINED
9 #define SkMutex_win_DEFINED
10
11 /** Windows CriticalSection based mutex. */
12
13 #ifndef WIN32_LEAN_AND_MEAN
14 #  define WIN32_LEAN_AND_MEAN
15 #  define WIN32_IS_MEAN_WAS_LOCALLY_DEFINED
16 #endif
17 #ifndef NOMINMAX
18 #  define NOMINMAX
19 #  define NOMINMAX_WAS_LOCALLY_DEFINED
20 #endif
21 #
22 #include <windows.h>
23 #
24 #ifdef WIN32_IS_MEAN_WAS_LOCALLY_DEFINED
25 #  undef WIN32_IS_MEAN_WAS_LOCALLY_DEFINED
26 #  undef WIN32_LEAN_AND_MEAN
27 #endif
28 #ifdef NOMINMAX_WAS_LOCALLY_DEFINED
29 #  undef NOMINMAX_WAS_LOCALLY_DEFINED
30 #  undef NOMINMAX
31 #endif
32
33 // On Windows, SkBaseMutex and SkMutex are the same thing,
34 // we can't easily get rid of static initializers.
35 class SkMutex {
36 public:
37     SkMutex() {
38         InitializeCriticalSection(&fStorage);
39     }
40
41     ~SkMutex() {
42         DeleteCriticalSection(&fStorage);
43     }
44
45     void acquire() {
46         EnterCriticalSection(&fStorage);
47     }
48
49     void release() {
50         LeaveCriticalSection(&fStorage);
51     }
52
53 private:
54     SkMutex(const SkMutex&);
55     SkMutex& operator=(const SkMutex&);
56
57     CRITICAL_SECTION fStorage;
58 };
59
60 typedef SkMutex SkBaseMutex;
61
62 // Windows currently provides no documented means of POD initializing a CRITICAL_SECTION.
63 #define SK_DECLARE_STATIC_MUTEX(name) static SkBaseMutex name
64 #define SK_DECLARE_GLOBAL_MUTEX(name) SkBaseMutex name
65
66 #endif