widget/gtk/WidgetTraceEvent.cpp@6474c204b198 (annotated)
widget/gtk/WidgetTraceEvent.cpp
Wed, 31 Dec 2014 06:09:35 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Wed, 31 Dec 2014 06:09:35 +0100
- changeset 0
- 6474c204b198
- permissions
- -rw-r--r--
Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.
| michael@0 | 1 | /* This Source Code Form is subject to the terms of the Mozilla Public |
| michael@0 | 2 | * License, v. 2.0. If a copy of the MPL was not distributed with this |
| michael@0 | 3 | * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ |
| michael@0 | 4 | |
| michael@0 | 5 | #include "mozilla/WidgetTraceEvent.h" |
| michael@0 | 6 | |
| michael@0 | 7 | #include <glib.h> |
| michael@0 | 8 | #include <mozilla/CondVar.h> |
| michael@0 | 9 | #include <mozilla/Mutex.h> |
| michael@0 | 10 | #include <stdio.h> |
| michael@0 | 11 | |
| michael@0 | 12 | using mozilla::CondVar; |
| michael@0 | 13 | using mozilla::Mutex; |
| michael@0 | 14 | using mozilla::MutexAutoLock; |
| michael@0 | 15 | |
| michael@0 | 16 | namespace { |
| michael@0 | 17 | |
| michael@0 | 18 | Mutex* sMutex = nullptr; |
| michael@0 | 19 | CondVar* sCondVar = nullptr; |
| michael@0 | 20 | bool sTracerProcessed = false; |
| michael@0 | 21 | |
| michael@0 | 22 | // This function is called from the main (UI) thread. |
| michael@0 | 23 | gboolean TracerCallback(gpointer data) |
| michael@0 | 24 | { |
| michael@0 | 25 | mozilla::SignalTracerThread(); |
| michael@0 | 26 | return FALSE; |
| michael@0 | 27 | } |
| michael@0 | 28 | |
| michael@0 | 29 | } // namespace |
| michael@0 | 30 | |
| michael@0 | 31 | namespace mozilla { |
| michael@0 | 32 | |
| michael@0 | 33 | bool InitWidgetTracing() |
| michael@0 | 34 | { |
| michael@0 | 35 | sMutex = new Mutex("Event tracer thread mutex"); |
| michael@0 | 36 | sCondVar = new CondVar(*sMutex, "Event tracer thread condvar"); |
| michael@0 | 37 | return sMutex && sCondVar; |
| michael@0 | 38 | } |
| michael@0 | 39 | |
| michael@0 | 40 | void CleanUpWidgetTracing() |
| michael@0 | 41 | { |
| michael@0 | 42 | delete sMutex; |
| michael@0 | 43 | delete sCondVar; |
| michael@0 | 44 | sMutex = nullptr; |
| michael@0 | 45 | sCondVar = nullptr; |
| michael@0 | 46 | } |
| michael@0 | 47 | |
| michael@0 | 48 | // This function is called from the background tracer thread. |
| michael@0 | 49 | bool FireAndWaitForTracerEvent() |
| michael@0 | 50 | { |
| michael@0 | 51 | NS_ABORT_IF_FALSE(sMutex && sCondVar, "Tracing not initialized!"); |
| michael@0 | 52 | |
| michael@0 | 53 | // Send a default-priority idle event through the |
| michael@0 | 54 | // event loop, and wait for it to finish. |
| michael@0 | 55 | MutexAutoLock lock(*sMutex); |
| michael@0 | 56 | NS_ABORT_IF_FALSE(!sTracerProcessed, "Tracer synchronization state is wrong"); |
| michael@0 | 57 | g_idle_add_full(G_PRIORITY_DEFAULT, |
| michael@0 | 58 | TracerCallback, |
| michael@0 | 59 | nullptr, |
| michael@0 | 60 | nullptr); |
| michael@0 | 61 | while (!sTracerProcessed) |
| michael@0 | 62 | sCondVar->Wait(); |
| michael@0 | 63 | sTracerProcessed = false; |
| michael@0 | 64 | return true; |
| michael@0 | 65 | } |
| michael@0 | 66 | |
| michael@0 | 67 | void SignalTracerThread() |
| michael@0 | 68 | { |
| michael@0 | 69 | if (!sMutex || !sCondVar) |
| michael@0 | 70 | return; |
| michael@0 | 71 | MutexAutoLock lock(*sMutex); |
| michael@0 | 72 | if (!sTracerProcessed) { |
| michael@0 | 73 | sTracerProcessed = true; |
| michael@0 | 74 | sCondVar->Notify(); |
| michael@0 | 75 | } |
| michael@0 | 76 | } |
| michael@0 | 77 | |
| michael@0 | 78 | } // namespace mozilla |
