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comparison: widget/gonk/WidgetTraceEvent.cpp
widget/gonk/WidgetTraceEvent.cpp
- changeset 0
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| -1:000000000000 | 0:d59b938cdeaa |
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| 1 /* This Source Code Form is subject to the terms of the Mozilla Public | |
| 2 * License, v. 2.0. If a copy of the MPL was not distributed with this | |
| 3 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ | |
| 4 | |
| 5 #include "mozilla/WidgetTraceEvent.h" | |
| 6 #include "mozilla/StaticPtr.h" | |
| 7 #include "nsThreadUtils.h" | |
| 8 #include <mozilla/CondVar.h> | |
| 9 #include <mozilla/Mutex.h> | |
| 10 | |
| 11 using mozilla::CondVar; | |
| 12 using mozilla::Mutex; | |
| 13 using mozilla::MutexAutoLock; | |
| 14 | |
| 15 namespace mozilla { | |
| 16 class TracerRunnable : public nsRunnable { | |
| 17 public: | |
| 18 TracerRunnable() { | |
| 19 mTracerLock = new Mutex("TracerRunnable"); | |
| 20 mTracerCondVar = new CondVar(*mTracerLock, "TracerRunnable"); | |
| 21 mMainThread = do_GetMainThread(); | |
| 22 } | |
| 23 | |
| 24 ~TracerRunnable() { | |
| 25 delete mTracerCondVar; | |
| 26 delete mTracerLock; | |
| 27 mTracerLock = nullptr; | |
| 28 mTracerCondVar = nullptr; | |
| 29 } | |
| 30 | |
| 31 virtual nsresult Run() { | |
| 32 MutexAutoLock lock(*mTracerLock); | |
| 33 mHasRun = true; | |
| 34 mTracerCondVar->Notify(); | |
| 35 return NS_OK; | |
| 36 } | |
| 37 | |
| 38 bool Fire() { | |
| 39 if (!mTracerLock || !mTracerCondVar) { | |
| 40 return false; | |
| 41 } | |
| 42 | |
| 43 MutexAutoLock lock(*mTracerLock); | |
| 44 mHasRun = false; | |
| 45 mMainThread->Dispatch(this, NS_DISPATCH_NORMAL); | |
| 46 while (!mHasRun) { | |
| 47 mTracerCondVar->Wait(); | |
| 48 } | |
| 49 return true; | |
| 50 } | |
| 51 | |
| 52 void Signal() { | |
| 53 MutexAutoLock lock(*mTracerLock); | |
| 54 mHasRun = true; | |
| 55 mTracerCondVar->Notify(); | |
| 56 } | |
| 57 | |
| 58 private: | |
| 59 Mutex* mTracerLock; | |
| 60 CondVar* mTracerCondVar; | |
| 61 bool mHasRun; | |
| 62 nsCOMPtr<nsIThread> mMainThread; | |
| 63 }; | |
| 64 | |
| 65 StaticRefPtr<TracerRunnable> sTracerRunnable; | |
| 66 | |
| 67 bool InitWidgetTracing() | |
| 68 { | |
| 69 if (!sTracerRunnable) { | |
| 70 sTracerRunnable = new TracerRunnable(); | |
| 71 } | |
| 72 return true; | |
| 73 } | |
| 74 | |
| 75 void CleanUpWidgetTracing() | |
| 76 { | |
| 77 sTracerRunnable = nullptr; | |
| 78 } | |
| 79 | |
| 80 bool FireAndWaitForTracerEvent() | |
| 81 { | |
| 82 if (sTracerRunnable) { | |
| 83 return sTracerRunnable->Fire(); | |
| 84 } | |
| 85 | |
| 86 return false; | |
| 87 } | |
| 88 | |
| 89 void SignalTracerThread() | |
| 90 { | |
| 91 if (sTracerRunnable) { | |
| 92 return sTracerRunnable->Signal(); | |
| 93 } | |
| 94 } | |
| 95 } // namespace mozilla | |
| 96 |
