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1 /* | 1 /* |
2 * Copyright (c) 2011 The WebRTC project authors. All Rights Reserved. | 2 * Copyright (c) 2011 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 |
11 #ifndef WEBRTC_SYSTEM_WRAPPERS_INCLUDE_RW_LOCK_WRAPPER_H_ | 11 #ifndef WEBRTC_SYSTEM_WRAPPERS_INCLUDE_RW_LOCK_WRAPPER_H_ |
12 #define WEBRTC_SYSTEM_WRAPPERS_INCLUDE_RW_LOCK_WRAPPER_H_ | 12 #define WEBRTC_SYSTEM_WRAPPERS_INCLUDE_RW_LOCK_WRAPPER_H_ |
13 | 13 |
14 #include "webrtc/rtc_base/thread_annotations.h" | 14 #include "webrtc/rtc_base/thread_annotations.h" |
15 | 15 |
16 // Note, Windows pre-Vista version of RW locks are not supported natively. For | 16 // Note, Windows pre-Vista version of RW locks are not supported natively. For |
17 // these OSs regular critical sections have been used to approximate RW lock | 17 // these OSs regular critical sections have been used to approximate RW lock |
18 // functionality and will therefore have worse performance. | 18 // functionality and will therefore have worse performance. |
19 | 19 |
20 namespace webrtc { | 20 namespace webrtc { |
21 | 21 |
22 class RTC_LOCKABLE RWLockWrapper { | 22 class LOCKABLE RWLockWrapper { |
23 public: | 23 public: |
24 static RWLockWrapper* CreateRWLock(); | 24 static RWLockWrapper* CreateRWLock(); |
25 virtual ~RWLockWrapper() {} | 25 virtual ~RWLockWrapper() {} |
26 | 26 |
27 virtual void AcquireLockExclusive() RTC_EXCLUSIVE_LOCK_FUNCTION() = 0; | 27 virtual void AcquireLockExclusive() EXCLUSIVE_LOCK_FUNCTION() = 0; |
28 virtual void ReleaseLockExclusive() RTC_UNLOCK_FUNCTION() = 0; | 28 virtual void ReleaseLockExclusive() UNLOCK_FUNCTION() = 0; |
29 | 29 |
30 virtual void AcquireLockShared() RTC_SHARED_LOCK_FUNCTION() = 0; | 30 virtual void AcquireLockShared() SHARED_LOCK_FUNCTION() = 0; |
31 virtual void ReleaseLockShared() RTC_UNLOCK_FUNCTION() = 0; | 31 virtual void ReleaseLockShared() UNLOCK_FUNCTION() = 0; |
32 }; | 32 }; |
33 | 33 |
34 // RAII extensions of the RW lock. Prevents Acquire/Release missmatches and | 34 // RAII extensions of the RW lock. Prevents Acquire/Release missmatches and |
35 // provides more compact locking syntax. | 35 // provides more compact locking syntax. |
36 class RTC_SCOPED_LOCKABLE ReadLockScoped { | 36 class SCOPED_LOCKABLE ReadLockScoped { |
37 public: | 37 public: |
38 ReadLockScoped(RWLockWrapper& rw_lock) RTC_SHARED_LOCK_FUNCTION(rw_lock) | 38 ReadLockScoped(RWLockWrapper& rw_lock) SHARED_LOCK_FUNCTION(rw_lock) |
39 : rw_lock_(rw_lock) { | 39 : rw_lock_(rw_lock) { |
40 rw_lock_.AcquireLockShared(); | 40 rw_lock_.AcquireLockShared(); |
41 } | 41 } |
42 | 42 |
43 ~ReadLockScoped() RTC_UNLOCK_FUNCTION() { rw_lock_.ReleaseLockShared(); } | 43 ~ReadLockScoped() UNLOCK_FUNCTION() { |
| 44 rw_lock_.ReleaseLockShared(); |
| 45 } |
44 | 46 |
45 private: | 47 private: |
46 RWLockWrapper& rw_lock_; | 48 RWLockWrapper& rw_lock_; |
47 }; | 49 }; |
48 | 50 |
49 class RTC_SCOPED_LOCKABLE WriteLockScoped { | 51 class SCOPED_LOCKABLE WriteLockScoped { |
50 public: | 52 public: |
51 WriteLockScoped(RWLockWrapper& rw_lock) RTC_EXCLUSIVE_LOCK_FUNCTION(rw_lock) | 53 WriteLockScoped(RWLockWrapper& rw_lock) EXCLUSIVE_LOCK_FUNCTION(rw_lock) |
52 : rw_lock_(rw_lock) { | 54 : rw_lock_(rw_lock) { |
53 rw_lock_.AcquireLockExclusive(); | 55 rw_lock_.AcquireLockExclusive(); |
54 } | 56 } |
55 | 57 |
56 ~WriteLockScoped() RTC_UNLOCK_FUNCTION() { rw_lock_.ReleaseLockExclusive(); } | 58 ~WriteLockScoped() UNLOCK_FUNCTION() { |
| 59 rw_lock_.ReleaseLockExclusive(); |
| 60 } |
57 | 61 |
58 private: | 62 private: |
59 RWLockWrapper& rw_lock_; | 63 RWLockWrapper& rw_lock_; |
60 }; | 64 }; |
61 | 65 |
62 } // namespace webrtc | 66 } // namespace webrtc |
63 | 67 |
64 #endif // WEBRTC_SYSTEM_WRAPPERS_INCLUDE_RW_LOCK_WRAPPER_H_ | 68 #endif // WEBRTC_SYSTEM_WRAPPERS_INCLUDE_RW_LOCK_WRAPPER_H_ |
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