The Tor Browser / file comparison
comparison: widget/gtk/WidgetTraceEvent.cpp
widget/gtk/WidgetTraceEvent.cpp
- branch
- TOR_BUG_9701
- changeset 15
- b8a032363ba2
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| -1:000000000000 | 0:3a2e488af2b6 |
|---|---|
| 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 | |
| 7 #include <glib.h> | |
| 8 #include <mozilla/CondVar.h> | |
| 9 #include <mozilla/Mutex.h> | |
| 10 #include <stdio.h> | |
| 11 | |
| 12 using mozilla::CondVar; | |
| 13 using mozilla::Mutex; | |
| 14 using mozilla::MutexAutoLock; | |
| 15 | |
| 16 namespace { | |
| 17 | |
| 18 Mutex* sMutex = nullptr; | |
| 19 CondVar* sCondVar = nullptr; | |
| 20 bool sTracerProcessed = false; | |
| 21 | |
| 22 // This function is called from the main (UI) thread. | |
| 23 gboolean TracerCallback(gpointer data) | |
| 24 { | |
| 25 mozilla::SignalTracerThread(); | |
| 26 return FALSE; | |
| 27 } | |
| 28 | |
| 29 } // namespace | |
| 30 | |
| 31 namespace mozilla { | |
| 32 | |
| 33 bool InitWidgetTracing() | |
| 34 { | |
| 35 sMutex = new Mutex("Event tracer thread mutex"); | |
| 36 sCondVar = new CondVar(*sMutex, "Event tracer thread condvar"); | |
| 37 return sMutex && sCondVar; | |
| 38 } | |
| 39 | |
| 40 void CleanUpWidgetTracing() | |
| 41 { | |
| 42 delete sMutex; | |
| 43 delete sCondVar; | |
| 44 sMutex = nullptr; | |
| 45 sCondVar = nullptr; | |
| 46 } | |
| 47 | |
| 48 // This function is called from the background tracer thread. | |
| 49 bool FireAndWaitForTracerEvent() | |
| 50 { | |
| 51 NS_ABORT_IF_FALSE(sMutex && sCondVar, "Tracing not initialized!"); | |
| 52 | |
| 53 // Send a default-priority idle event through the | |
| 54 // event loop, and wait for it to finish. | |
| 55 MutexAutoLock lock(*sMutex); | |
| 56 NS_ABORT_IF_FALSE(!sTracerProcessed, "Tracer synchronization state is wrong"); | |
| 57 g_idle_add_full(G_PRIORITY_DEFAULT, | |
| 58 TracerCallback, | |
| 59 nullptr, | |
| 60 nullptr); | |
| 61 while (!sTracerProcessed) | |
| 62 sCondVar->Wait(); | |
| 63 sTracerProcessed = false; | |
| 64 return true; | |
| 65 } | |
| 66 | |
| 67 void SignalTracerThread() | |
| 68 { | |
| 69 if (!sMutex || !sCondVar) | |
| 70 return; | |
| 71 MutexAutoLock lock(*sMutex); | |
| 72 if (!sTracerProcessed) { | |
| 73 sTracerProcessed = true; | |
| 74 sCondVar->Notify(); | |
| 75 } | |
| 76 } | |
| 77 | |
| 78 } // namespace mozilla |
