OLD | NEW |
1 /* | 1 /* |
2 * Copyright 2012 Google Inc. | 2 * Copyright 2012 Google Inc. |
3 * | 3 * |
4 * Use of this source code is governed by a BSD-style license that can be | 4 * Use of this source code is governed by a BSD-style license that can be |
5 * found in the LICENSE file. | 5 * found in the LICENSE file. |
6 */ | 6 */ |
7 | 7 |
8 #ifndef SkCondVar_DEFINED | 8 #ifndef SkCondVar_DEFINED |
9 #define SkCondVar_DEFINED | 9 #define SkCondVar_DEFINED |
10 | 10 |
11 /** | |
12 * Import any thread model setting from configuration files. | |
13 */ | |
14 #include "SkTypes.h" | 11 #include "SkTypes.h" |
15 | 12 |
16 #ifdef SK_USE_POSIX_THREADS | 13 #ifdef SK_USE_POSIX_THREADS |
17 #include <pthread.h> | 14 #include <pthread.h> |
18 #elif defined(SK_BUILD_FOR_WIN32) | 15 #elif defined(SK_BUILD_FOR_WIN32) |
19 #include <windows.h> | 16 #include <windows.h> |
20 #else | 17 #else |
21 /** | 18 #error "SkCondVar requires pthreads or Windows." |
22 * Warn if the implementation of this class is empty, i.e. thread safety is not
working. | |
23 */ | |
24 #warning "Thread safety class SkCondVar has no implementation!" | |
25 #endif | 19 #endif |
26 | 20 |
27 /** | 21 /** |
28 * Condition variable for blocking access to shared data from other threads and | 22 * Condition variable for blocking access to shared data from other threads and |
29 * controlling which threads are awake. | 23 * controlling which threads are awake. |
30 * | 24 * |
31 * Currently only supported on platforms with posix threads and Windows Vista an
d | 25 * Currently only supported on platforms with posix threads and Windows Vista an
d above. |
32 * above. | |
33 */ | 26 */ |
34 class SkCondVar { | 27 class SkCondVar { |
35 public: | 28 public: |
| 29 /** Returns true if it makes sense to create and use SkCondVars. |
| 30 * You _MUST_ call this method and it must return true before creating any
SkCondVars. |
| 31 */ |
| 32 static bool Supported(); |
| 33 |
36 SkCondVar(); | 34 SkCondVar(); |
37 ~SkCondVar(); | 35 ~SkCondVar(); |
38 | 36 |
39 /** | 37 /** |
40 * Lock a mutex. Must be done before calling the other functions on this obj
ect. | 38 * Lock a mutex. Must be done before calling the other functions on this obj
ect. |
41 */ | 39 */ |
42 void lock(); | 40 void lock(); |
43 | 41 |
44 /** | 42 /** |
45 * Unlock the mutex. | 43 * Unlock the mutex. |
(...skipping 23 matching lines...) Expand all Loading... |
69 #ifdef SK_USE_POSIX_THREADS | 67 #ifdef SK_USE_POSIX_THREADS |
70 pthread_mutex_t fMutex; | 68 pthread_mutex_t fMutex; |
71 pthread_cond_t fCond; | 69 pthread_cond_t fCond; |
72 #elif defined(SK_BUILD_FOR_WIN32) | 70 #elif defined(SK_BUILD_FOR_WIN32) |
73 CRITICAL_SECTION fCriticalSection; | 71 CRITICAL_SECTION fCriticalSection; |
74 CONDITION_VARIABLE fCondition; | 72 CONDITION_VARIABLE fCondition; |
75 #endif | 73 #endif |
76 }; | 74 }; |
77 | 75 |
78 #endif | 76 #endif |
OLD | NEW |