| OLD | NEW |
|---|
| (Empty) |
| 1 /* | |
| 2 * Copyright (c) 2016 The WebRTC project authors. All Rights Reserved. | |
| 3 * | |
| 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 | |
| 6 * tree. An additional intellectual property rights grant can be found | |
| 7 * in the file PATENTS. All contributing project authors may | |
| 8 * be found in the AUTHORS file in the root of the source tree. | |
| 9 */ | |
| 10 | |
| 11 #include "webrtc/base/thread_annotations.h" | |
| 12 #include "webrtc/test/gtest.h" | |
| 13 | |
| 14 namespace { | |
| 15 | |
| 16 class LOCKABLE Lock { | |
| 17 public: | |
| 18 void EnterWrite() const EXCLUSIVE_LOCK_FUNCTION() {} | |
| 19 void EnterRead() const SHARED_LOCK_FUNCTION() {} | |
| 20 bool TryEnterWrite() const EXCLUSIVE_TRYLOCK_FUNCTION(true) { return true; } | |
| 21 bool TryEnterRead() const SHARED_TRYLOCK_FUNCTION(true) { return true; } | |
| 22 void Leave() const UNLOCK_FUNCTION() {} | |
| 23 }; | |
| 24 | |
| 25 class SCOPED_LOCKABLE ScopeLock { | |
| 26 public: | |
| 27 explicit ScopeLock(const Lock& lock) EXCLUSIVE_LOCK_FUNCTION(lock) {} | |
| 28 ~ScopeLock() UNLOCK_FUNCTION() {} | |
| 29 }; | |
| 30 | |
| 31 class ThreadSafe { | |
| 32 public: | |
| 33 ThreadSafe() { | |
| 34 pt_protected_by_lock_ = new int; | |
| 35 pt_protected_by_anything_ = new int; | |
| 36 } | |
| 37 | |
| 38 ~ThreadSafe() { | |
| 39 delete pt_protected_by_lock_; | |
| 40 delete pt_protected_by_anything_; | |
| 41 } | |
| 42 | |
| 43 void LockInOrder() { | |
| 44 anylock_.EnterWrite(); | |
| 45 lock_.EnterWrite(); | |
| 46 pt_lock_.EnterWrite(); | |
| 47 | |
| 48 pt_lock_.Leave(); | |
| 49 lock_.Leave(); | |
| 50 anylock_.Leave(); | |
| 51 } | |
| 52 | |
| 53 void UnprotectedFunction() LOCKS_EXCLUDED(anylock_, lock_, pt_lock_) { | |
| 54 // Can access unprotected Value. | |
| 55 unprotected_ = 15; | |
| 56 // Can access pointers themself, but not data they point to. | |
| 57 int* tmp = pt_protected_by_lock_; | |
| 58 pt_protected_by_lock_ = pt_protected_by_anything_; | |
| 59 pt_protected_by_anything_ = tmp; | |
| 60 } | |
| 61 | |
| 62 void ReadProtected() { | |
| 63 lock_.EnterRead(); | |
| 64 unprotected_ = protected_by_anything_; | |
| 65 unprotected_ = protected_by_lock_; | |
| 66 lock_.Leave(); | |
| 67 | |
| 68 if (pt_lock_.TryEnterRead()) { | |
| 69 unprotected_ = *pt_protected_by_anything_; | |
| 70 unprotected_ = *pt_protected_by_lock_; | |
| 71 pt_lock_.Leave(); | |
| 72 } | |
| 73 | |
| 74 anylock_.EnterRead(); | |
| 75 unprotected_ = protected_by_anything_; | |
| 76 unprotected_ = *pt_protected_by_anything_; | |
| 77 anylock_.Leave(); | |
| 78 } | |
| 79 | |
| 80 void WriteProtected() { | |
| 81 lock_.EnterWrite(); | |
| 82 protected_by_anything_ = unprotected_; | |
| 83 protected_by_lock_ = unprotected_; | |
| 84 lock_.Leave(); | |
| 85 | |
| 86 if (pt_lock_.TryEnterWrite()) { | |
| 87 *pt_protected_by_anything_ = unprotected_; | |
| 88 *pt_protected_by_lock_ = unprotected_; | |
| 89 pt_lock_.Leave(); | |
| 90 } | |
| 91 | |
| 92 anylock_.EnterWrite(); | |
| 93 protected_by_anything_ = unprotected_; | |
| 94 *pt_protected_by_anything_ = unprotected_; | |
| 95 anylock_.Leave(); | |
| 96 } | |
| 97 | |
| 98 void CallReadProtectedFunction() { | |
| 99 lock_.EnterRead(); | |
| 100 pt_lock_.EnterRead(); | |
| 101 ReadProtectedFunction(); | |
| 102 pt_lock_.Leave(); | |
| 103 lock_.Leave(); | |
| 104 } | |
| 105 | |
| 106 void CallWriteProtectedFunction() { | |
| 107 ScopeLock scope_lock(GetLock()); | |
| 108 ScopeLock pt_scope_lock(pt_lock_); | |
| 109 WriteProtectedFunction(); | |
| 110 } | |
| 111 | |
| 112 private: | |
| 113 void ReadProtectedFunction() SHARED_LOCKS_REQUIRED(lock_, pt_lock_) { | |
| 114 unprotected_ = protected_by_lock_; | |
| 115 unprotected_ = *pt_protected_by_lock_; | |
| 116 } | |
| 117 | |
| 118 void WriteProtectedFunction() EXCLUSIVE_LOCKS_REQUIRED(lock_, pt_lock_) { | |
| 119 int x = protected_by_lock_; | |
| 120 *pt_protected_by_lock_ = x; | |
| 121 protected_by_lock_ = unprotected_; | |
| 122 } | |
| 123 | |
| 124 const Lock& GetLock() LOCK_RETURNED(lock_) { return lock_; } | |
| 125 | |
| 126 Lock anylock_ ACQUIRED_BEFORE(lock_); | |
| 127 Lock lock_; | |
| 128 Lock pt_lock_ ACQUIRED_AFTER(lock_); | |
| 129 | |
| 130 int unprotected_ = 0; | |
| 131 | |
| 132 int protected_by_lock_ GUARDED_BY(lock_) = 0; | |
| 133 int protected_by_anything_ GUARDED_VAR = 0; | |
| 134 | |
| 135 int* pt_protected_by_lock_ PT_GUARDED_BY(pt_lock_); | |
| 136 int* pt_protected_by_anything_ PT_GUARDED_VAR; | |
| 137 }; | |
| 138 | |
| 139 } // namespace | |
| 140 | |
| 141 TEST(ThreadAnnotationsTest, Test) { | |
| 142 // This test ensure thread annotations doesn't break compilation. | |
| 143 // Thus no run-time expectations. | |
| 144 ThreadSafe t; | |
| 145 t.LockInOrder(); | |
| 146 t.UnprotectedFunction(); | |
| 147 t.ReadProtected(); | |
| 148 t.WriteProtected(); | |
| 149 t.CallReadProtectedFunction(); | |
| 150 t.CallWriteProtectedFunction(); | |
| 151 } | |
| OLD | NEW |
|---|
Chromium Code Reviews
Issue 2877023002:
Move webrtc/{base => rtc_base} (Closed)
