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| 1 // Copyright (c) 2006-2008 The Chromium Authors. All rights reserved. |
| 2 // Use of this source code is governed by a BSD-style license that can be |
| 3 // found in the LICENSE file. |
| 4 |
| 5 #include "base/message_loop.h" |
| 6 #include "base/platform_thread.h" |
| 7 #include "base/waitable_event.h" |
| 8 #include "base/waitable_event_watcher.h" |
| 9 #include "testing/gtest/include/gtest/gtest.h" |
| 10 |
| 11 using base::WaitableEvent; |
| 12 using base::WaitableEventWatcher; |
| 13 |
| 14 namespace { |
| 15 |
| 16 class QuitDelegate : public WaitableEventWatcher::Delegate { |
| 17 public: |
| 18 virtual void OnWaitableEventSignaled(WaitableEvent* event) { |
| 19 MessageLoop::current()->Quit(); |
| 20 } |
| 21 }; |
| 22 |
| 23 class DecrementCountDelegate : public WaitableEventWatcher::Delegate { |
| 24 public: |
| 25 DecrementCountDelegate(int* counter) : counter_(counter) { |
| 26 } |
| 27 virtual void OnWaitableEventSignaled(WaitableEvent* object) { |
| 28 --(*counter_); |
| 29 } |
| 30 private: |
| 31 int* counter_; |
| 32 }; |
| 33 |
| 34 } // namespace |
| 35 |
| 36 void RunTest_BasicSignal(MessageLoop::Type message_loop_type) { |
| 37 MessageLoop message_loop(message_loop_type); |
| 38 |
| 39 // A manual-reset event that is not yet signaled. |
| 40 WaitableEvent event(true, false); |
| 41 |
| 42 WaitableEventWatcher watcher; |
| 43 EXPECT_EQ(NULL, watcher.GetWatchedObject()); |
| 44 |
| 45 QuitDelegate delegate; |
| 46 watcher.StartWatching(&event, &delegate); |
| 47 EXPECT_EQ(&event, watcher.GetWatchedObject()); |
| 48 |
| 49 event.Signal(); |
| 50 |
| 51 MessageLoop::current()->Run(); |
| 52 |
| 53 EXPECT_EQ(NULL, watcher.GetWatchedObject()); |
| 54 } |
| 55 |
| 56 void RunTest_BasicCancel(MessageLoop::Type message_loop_type) { |
| 57 MessageLoop message_loop(message_loop_type); |
| 58 |
| 59 // A manual-reset event that is not yet signaled. |
| 60 WaitableEvent event(true, false); |
| 61 |
| 62 WaitableEventWatcher watcher; |
| 63 |
| 64 QuitDelegate delegate; |
| 65 watcher.StartWatching(&event, &delegate); |
| 66 |
| 67 watcher.StopWatching(); |
| 68 } |
| 69 |
| 70 void RunTest_CancelAfterSet(MessageLoop::Type message_loop_type) { |
| 71 MessageLoop message_loop(message_loop_type); |
| 72 |
| 73 // A manual-reset event that is not yet signaled. |
| 74 WaitableEvent event(true, false); |
| 75 |
| 76 WaitableEventWatcher watcher; |
| 77 |
| 78 int counter = 1; |
| 79 DecrementCountDelegate delegate(&counter); |
| 80 |
| 81 watcher.StartWatching(&event, &delegate); |
| 82 |
| 83 event.Signal(); |
| 84 |
| 85 // Let the background thread do its business |
| 86 PlatformThread::Sleep(30); |
| 87 |
| 88 watcher.StopWatching(); |
| 89 |
| 90 MessageLoop::current()->RunAllPending(); |
| 91 |
| 92 // Our delegate should not have fired. |
| 93 EXPECT_EQ(1, counter); |
| 94 } |
| 95 |
| 96 void RunTest_OutlivesMessageLoop(MessageLoop::Type message_loop_type) { |
| 97 // Simulate a MessageLoop that dies before an WaitableEventWatcher. This |
| 98 // ordinarily doesn't happen when people use the Thread class, but it can |
| 99 // happen when people use the Singleton pattern or atexit. |
| 100 WaitableEvent event(true, false); |
| 101 { |
| 102 WaitableEventWatcher watcher; |
| 103 { |
| 104 MessageLoop message_loop(message_loop_type); |
| 105 |
| 106 QuitDelegate delegate; |
| 107 watcher.StartWatching(&event, &delegate); |
| 108 } |
| 109 } |
| 110 } |
| 111 |
| 112 //----------------------------------------------------------------------------- |
| 113 |
| 114 TEST(ObjectWatcherTest, BasicSignal) { |
| 115 RunTest_BasicSignal(MessageLoop::TYPE_DEFAULT); |
| 116 RunTest_BasicSignal(MessageLoop::TYPE_IO); |
| 117 RunTest_BasicSignal(MessageLoop::TYPE_UI); |
| 118 } |
| 119 |
| 120 TEST(ObjectWatcherTest, BasicCancel) { |
| 121 RunTest_BasicCancel(MessageLoop::TYPE_DEFAULT); |
| 122 RunTest_BasicCancel(MessageLoop::TYPE_IO); |
| 123 RunTest_BasicCancel(MessageLoop::TYPE_UI); |
| 124 } |
| 125 |
| 126 TEST(ObjectWatcherTest, CancelAfterSet) { |
| 127 RunTest_CancelAfterSet(MessageLoop::TYPE_DEFAULT); |
| 128 RunTest_CancelAfterSet(MessageLoop::TYPE_IO); |
| 129 RunTest_CancelAfterSet(MessageLoop::TYPE_UI); |
| 130 } |
| 131 |
| 132 TEST(ObjectWatcherTest, OutlivesMessageLoop) { |
| 133 RunTest_OutlivesMessageLoop(MessageLoop::TYPE_DEFAULT); |
| 134 RunTest_OutlivesMessageLoop(MessageLoop::TYPE_IO); |
| 135 RunTest_OutlivesMessageLoop(MessageLoop::TYPE_UI); |
| 136 } |
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