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1 /* | 1 /* |
2 * Copyright 2004 The WebRTC Project Authors. All rights reserved. | 2 * Copyright 2004 The WebRTC Project Authors. All rights reserved. |
3 * | 3 * |
4 * Use of this source code is governed by a BSD-style license | 4 * Use of this source code is governed by a BSD-style license |
5 * that can be found in the LICENSE file in the root of the source | 5 * that can be found in the LICENSE file in the root of the source |
6 * tree. An additional intellectual property rights grant can be found | 6 * tree. An additional intellectual property rights grant can be found |
7 * in the file PATENTS. All contributing project authors may | 7 * in the file PATENTS. All contributing project authors may |
8 * be found in the AUTHORS file in the root of the source tree. | 8 * be found in the AUTHORS file in the root of the source tree. |
9 */ | 9 */ |
10 | 10 |
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65 #endif | 65 #endif |
66 }; | 66 }; |
67 | 67 |
68 // CritScope, for serializing execution through a scope. | 68 // CritScope, for serializing execution through a scope. |
69 class SCOPED_LOCKABLE CritScope { | 69 class SCOPED_LOCKABLE CritScope { |
70 public: | 70 public: |
71 explicit CritScope(CriticalSection* cs) EXCLUSIVE_LOCK_FUNCTION(cs); | 71 explicit CritScope(CriticalSection* cs) EXCLUSIVE_LOCK_FUNCTION(cs); |
72 ~CritScope() UNLOCK_FUNCTION(); | 72 ~CritScope() UNLOCK_FUNCTION(); |
73 private: | 73 private: |
74 CriticalSection* const cs_; | 74 CriticalSection* const cs_; |
75 DISALLOW_COPY_AND_ASSIGN(CritScope); | 75 RTC_DISALLOW_COPY_AND_ASSIGN(CritScope); |
76 }; | 76 }; |
77 | 77 |
78 // Tries to lock a critical section on construction via | 78 // Tries to lock a critical section on construction via |
79 // CriticalSection::TryEnter, and unlocks on destruction if the | 79 // CriticalSection::TryEnter, and unlocks on destruction if the |
80 // lock was taken. Never blocks. | 80 // lock was taken. Never blocks. |
81 // | 81 // |
82 // IMPORTANT: Unlike CritScope, the lock may not be owned by this thread in | 82 // IMPORTANT: Unlike CritScope, the lock may not be owned by this thread in |
83 // subsequent code. Users *must* check locked() to determine if the | 83 // subsequent code. Users *must* check locked() to determine if the |
84 // lock was taken. If you're not calling locked(), you're doing it wrong! | 84 // lock was taken. If you're not calling locked(), you're doing it wrong! |
85 class TryCritScope { | 85 class TryCritScope { |
86 public: | 86 public: |
87 explicit TryCritScope(CriticalSection* cs); | 87 explicit TryCritScope(CriticalSection* cs); |
88 ~TryCritScope(); | 88 ~TryCritScope(); |
89 #if defined(WEBRTC_WIN) | 89 #if defined(WEBRTC_WIN) |
90 _Check_return_ bool locked() const; | 90 _Check_return_ bool locked() const; |
91 #else | 91 #else |
92 bool locked() const __attribute__((warn_unused_result)); | 92 bool locked() const __attribute__((warn_unused_result)); |
93 #endif | 93 #endif |
94 private: | 94 private: |
95 CriticalSection* const cs_; | 95 CriticalSection* const cs_; |
96 const bool locked_; | 96 const bool locked_; |
97 CS_DEBUG_CODE(mutable bool lock_was_called_); | 97 CS_DEBUG_CODE(mutable bool lock_was_called_); |
98 DISALLOW_COPY_AND_ASSIGN(TryCritScope); | 98 RTC_DISALLOW_COPY_AND_ASSIGN(TryCritScope); |
99 }; | 99 }; |
100 | 100 |
101 // A POD lock used to protect global variables. Do NOT use for other purposes. | 101 // A POD lock used to protect global variables. Do NOT use for other purposes. |
102 // No custom constructor or private data member should be added. | 102 // No custom constructor or private data member should be added. |
103 class LOCKABLE GlobalLockPod { | 103 class LOCKABLE GlobalLockPod { |
104 public: | 104 public: |
105 void Lock() EXCLUSIVE_LOCK_FUNCTION(); | 105 void Lock() EXCLUSIVE_LOCK_FUNCTION(); |
106 | 106 |
107 void Unlock() UNLOCK_FUNCTION(); | 107 void Unlock() UNLOCK_FUNCTION(); |
108 | 108 |
109 volatile int lock_acquired; | 109 volatile int lock_acquired; |
110 }; | 110 }; |
111 | 111 |
112 class GlobalLock : public GlobalLockPod { | 112 class GlobalLock : public GlobalLockPod { |
113 public: | 113 public: |
114 GlobalLock(); | 114 GlobalLock(); |
115 }; | 115 }; |
116 | 116 |
117 // GlobalLockScope, for serializing execution through a scope. | 117 // GlobalLockScope, for serializing execution through a scope. |
118 class SCOPED_LOCKABLE GlobalLockScope { | 118 class SCOPED_LOCKABLE GlobalLockScope { |
119 public: | 119 public: |
120 explicit GlobalLockScope(GlobalLockPod* lock) EXCLUSIVE_LOCK_FUNCTION(lock); | 120 explicit GlobalLockScope(GlobalLockPod* lock) EXCLUSIVE_LOCK_FUNCTION(lock); |
121 ~GlobalLockScope() UNLOCK_FUNCTION(); | 121 ~GlobalLockScope() UNLOCK_FUNCTION(); |
122 private: | 122 private: |
123 GlobalLockPod* const lock_; | 123 GlobalLockPod* const lock_; |
124 DISALLOW_COPY_AND_ASSIGN(GlobalLockScope); | 124 RTC_DISALLOW_COPY_AND_ASSIGN(GlobalLockScope); |
125 }; | 125 }; |
126 | 126 |
127 } // namespace rtc | 127 } // namespace rtc |
128 | 128 |
129 #endif // WEBRTC_BASE_CRITICALSECTION_H_ | 129 #endif // WEBRTC_BASE_CRITICALSECTION_H_ |
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