danilchap | 0140408 | 2016-10-24 06:07:25 -0700 | [diff] [blame] | 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 | |
Mirko Bonadei | 92ea95e | 2017-09-15 06:47:31 +0200 | [diff] [blame] | 11 | #include "rtc_base/thread_annotations.h" |
| 12 | #include "test/gtest.h" |
danilchap | 0140408 | 2016-10-24 06:07:25 -0700 | [diff] [blame] | 13 | |
| 14 | namespace { |
| 15 | |
danilchap | 5301e3c | 2017-09-06 04:10:21 -0700 | [diff] [blame] | 16 | class RTC_LOCKABLE Lock { |
danilchap | 0140408 | 2016-10-24 06:07:25 -0700 | [diff] [blame] | 17 | public: |
danilchap | 5301e3c | 2017-09-06 04:10:21 -0700 | [diff] [blame] | 18 | void EnterWrite() const RTC_EXCLUSIVE_LOCK_FUNCTION() {} |
| 19 | void EnterRead() const RTC_SHARED_LOCK_FUNCTION() {} |
| 20 | bool TryEnterWrite() const RTC_EXCLUSIVE_TRYLOCK_FUNCTION(true) { |
| 21 | return true; |
| 22 | } |
| 23 | bool TryEnterRead() const RTC_SHARED_TRYLOCK_FUNCTION(true) { return true; } |
| 24 | void Leave() const RTC_UNLOCK_FUNCTION() {} |
danilchap | 0140408 | 2016-10-24 06:07:25 -0700 | [diff] [blame] | 25 | }; |
| 26 | |
danilchap | 5301e3c | 2017-09-06 04:10:21 -0700 | [diff] [blame] | 27 | class RTC_SCOPED_LOCKABLE ScopeLock { |
danilchap | 0140408 | 2016-10-24 06:07:25 -0700 | [diff] [blame] | 28 | public: |
danilchap | 5301e3c | 2017-09-06 04:10:21 -0700 | [diff] [blame] | 29 | explicit ScopeLock(const Lock& lock) RTC_EXCLUSIVE_LOCK_FUNCTION(lock) {} |
| 30 | ~ScopeLock() RTC_UNLOCK_FUNCTION() {} |
danilchap | 0140408 | 2016-10-24 06:07:25 -0700 | [diff] [blame] | 31 | }; |
| 32 | |
| 33 | class ThreadSafe { |
| 34 | public: |
| 35 | ThreadSafe() { |
| 36 | pt_protected_by_lock_ = new int; |
| 37 | pt_protected_by_anything_ = new int; |
| 38 | } |
| 39 | |
| 40 | ~ThreadSafe() { |
| 41 | delete pt_protected_by_lock_; |
| 42 | delete pt_protected_by_anything_; |
| 43 | } |
| 44 | |
| 45 | void LockInOrder() { |
| 46 | anylock_.EnterWrite(); |
| 47 | lock_.EnterWrite(); |
| 48 | pt_lock_.EnterWrite(); |
| 49 | |
| 50 | pt_lock_.Leave(); |
| 51 | lock_.Leave(); |
| 52 | anylock_.Leave(); |
| 53 | } |
| 54 | |
danilchap | 5301e3c | 2017-09-06 04:10:21 -0700 | [diff] [blame] | 55 | void UnprotectedFunction() RTC_LOCKS_EXCLUDED(anylock_, lock_, pt_lock_) { |
danilchap | 0140408 | 2016-10-24 06:07:25 -0700 | [diff] [blame] | 56 | // Can access unprotected Value. |
| 57 | unprotected_ = 15; |
| 58 | // Can access pointers themself, but not data they point to. |
| 59 | int* tmp = pt_protected_by_lock_; |
| 60 | pt_protected_by_lock_ = pt_protected_by_anything_; |
| 61 | pt_protected_by_anything_ = tmp; |
| 62 | } |
| 63 | |
| 64 | void ReadProtected() { |
| 65 | lock_.EnterRead(); |
| 66 | unprotected_ = protected_by_anything_; |
| 67 | unprotected_ = protected_by_lock_; |
| 68 | lock_.Leave(); |
| 69 | |
| 70 | if (pt_lock_.TryEnterRead()) { |
| 71 | unprotected_ = *pt_protected_by_anything_; |
| 72 | unprotected_ = *pt_protected_by_lock_; |
| 73 | pt_lock_.Leave(); |
| 74 | } |
| 75 | |
| 76 | anylock_.EnterRead(); |
| 77 | unprotected_ = protected_by_anything_; |
| 78 | unprotected_ = *pt_protected_by_anything_; |
| 79 | anylock_.Leave(); |
| 80 | } |
| 81 | |
| 82 | void WriteProtected() { |
| 83 | lock_.EnterWrite(); |
| 84 | protected_by_anything_ = unprotected_; |
| 85 | protected_by_lock_ = unprotected_; |
| 86 | lock_.Leave(); |
| 87 | |
| 88 | if (pt_lock_.TryEnterWrite()) { |
| 89 | *pt_protected_by_anything_ = unprotected_; |
| 90 | *pt_protected_by_lock_ = unprotected_; |
| 91 | pt_lock_.Leave(); |
| 92 | } |
| 93 | |
| 94 | anylock_.EnterWrite(); |
| 95 | protected_by_anything_ = unprotected_; |
| 96 | *pt_protected_by_anything_ = unprotected_; |
| 97 | anylock_.Leave(); |
| 98 | } |
| 99 | |
| 100 | void CallReadProtectedFunction() { |
| 101 | lock_.EnterRead(); |
| 102 | pt_lock_.EnterRead(); |
| 103 | ReadProtectedFunction(); |
| 104 | pt_lock_.Leave(); |
| 105 | lock_.Leave(); |
| 106 | } |
| 107 | |
| 108 | void CallWriteProtectedFunction() { |
| 109 | ScopeLock scope_lock(GetLock()); |
| 110 | ScopeLock pt_scope_lock(pt_lock_); |
| 111 | WriteProtectedFunction(); |
| 112 | } |
| 113 | |
| 114 | private: |
danilchap | 5301e3c | 2017-09-06 04:10:21 -0700 | [diff] [blame] | 115 | void ReadProtectedFunction() RTC_SHARED_LOCKS_REQUIRED(lock_, pt_lock_) { |
danilchap | 0140408 | 2016-10-24 06:07:25 -0700 | [diff] [blame] | 116 | unprotected_ = protected_by_lock_; |
| 117 | unprotected_ = *pt_protected_by_lock_; |
| 118 | } |
| 119 | |
danilchap | 5301e3c | 2017-09-06 04:10:21 -0700 | [diff] [blame] | 120 | void WriteProtectedFunction() RTC_EXCLUSIVE_LOCKS_REQUIRED(lock_, pt_lock_) { |
danilchap | 0140408 | 2016-10-24 06:07:25 -0700 | [diff] [blame] | 121 | int x = protected_by_lock_; |
| 122 | *pt_protected_by_lock_ = x; |
| 123 | protected_by_lock_ = unprotected_; |
| 124 | } |
| 125 | |
danilchap | 5301e3c | 2017-09-06 04:10:21 -0700 | [diff] [blame] | 126 | const Lock& GetLock() RTC_LOCK_RETURNED(lock_) { return lock_; } |
danilchap | 0140408 | 2016-10-24 06:07:25 -0700 | [diff] [blame] | 127 | |
danilchap | 5301e3c | 2017-09-06 04:10:21 -0700 | [diff] [blame] | 128 | Lock anylock_ RTC_ACQUIRED_BEFORE(lock_); |
danilchap | 0140408 | 2016-10-24 06:07:25 -0700 | [diff] [blame] | 129 | Lock lock_; |
danilchap | 5301e3c | 2017-09-06 04:10:21 -0700 | [diff] [blame] | 130 | Lock pt_lock_ RTC_ACQUIRED_AFTER(lock_); |
danilchap | 0140408 | 2016-10-24 06:07:25 -0700 | [diff] [blame] | 131 | |
| 132 | int unprotected_ = 0; |
| 133 | |
danilchap | 5301e3c | 2017-09-06 04:10:21 -0700 | [diff] [blame] | 134 | int protected_by_lock_ RTC_GUARDED_BY(lock_) = 0; |
| 135 | int protected_by_anything_ RTC_GUARDED_VAR = 0; |
danilchap | 0140408 | 2016-10-24 06:07:25 -0700 | [diff] [blame] | 136 | |
danilchap | 5301e3c | 2017-09-06 04:10:21 -0700 | [diff] [blame] | 137 | int* pt_protected_by_lock_ RTC_PT_GUARDED_BY(pt_lock_); |
| 138 | int* pt_protected_by_anything_ RTC_PT_GUARDED_VAR; |
danilchap | 0140408 | 2016-10-24 06:07:25 -0700 | [diff] [blame] | 139 | }; |
| 140 | |
| 141 | } // namespace |
| 142 | |
| 143 | TEST(ThreadAnnotationsTest, Test) { |
| 144 | // This test ensure thread annotations doesn't break compilation. |
| 145 | // Thus no run-time expectations. |
| 146 | ThreadSafe t; |
| 147 | t.LockInOrder(); |
| 148 | t.UnprotectedFunction(); |
| 149 | t.ReadProtected(); |
| 150 | t.WriteProtected(); |
| 151 | t.CallReadProtectedFunction(); |
| 152 | t.CallWriteProtectedFunction(); |
| 153 | } |