blob: d84b0e42fd0da5fe0607544c6453001283d62a03 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
|
/*
* 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
// On Windows, SkBaseMutex and SkMutex are the same thing,
// we can't easily get rid of static initializers. However,
// we preserve the same inheritance pattern as other platforms
// so that we can forward-declare cleanly.
struct SkBaseMutex {
public:
SkBaseMutex() {
InitializeCriticalSection(&fStorage);
SkDEBUGCODE(fOwner = 0;)
}
~SkBaseMutex() {
SkASSERT(0 == fOwner);
DeleteCriticalSection(&fStorage);
}
void acquire() {
EnterCriticalSection(&fStorage);
SkDEBUGCODE(fOwner = GetCurrentThreadId();)
}
void release() {
this->assertHeld();
SkDEBUGCODE(fOwner = 0;)
LeaveCriticalSection(&fStorage);
}
void assertHeld() {
SkASSERT(GetCurrentThreadId() == fOwner);
}
protected:
CRITICAL_SECTION fStorage;
SkDEBUGCODE(DWORD fOwner;)
private:
SkBaseMutex(const SkBaseMutex&);
SkBaseMutex& operator=(const SkBaseMutex&);
};
class SkMutex : public 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
|
