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111 lines
3.3 KiB
C++
111 lines
3.3 KiB
C++
/* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is mozilla.org code.
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*
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* The Initial Developer of the Original Code is
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* The Mozilla Foundation.
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* Portions created by the Initial Developer are Copyright (C) 2011
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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* Ted Mielczarek <ted.mielczarek@gmail.com>
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either the GNU General Public License Version 2 or later (the "GPL"), or
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* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the MPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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#include "mozilla/WidgetTraceEvent.h"
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#include <glib.h>
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#include <mozilla/CondVar.h>
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#include <mozilla/Mutex.h>
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#include <stdio.h>
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using mozilla::CondVar;
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using mozilla::Mutex;
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using mozilla::MutexAutoLock;
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namespace {
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Mutex* sMutex = NULL;
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CondVar* sCondVar = NULL;
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bool sTracerProcessed = false;
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// This function is called from the main (UI) thread.
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gboolean TracerCallback(gpointer data)
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{
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mozilla::SignalTracerThread();
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return FALSE;
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}
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} // namespace
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namespace mozilla {
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bool InitWidgetTracing()
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{
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sMutex = new Mutex("Event tracer thread mutex");
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sCondVar = new CondVar(*sMutex, "Event tracer thread condvar");
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return sMutex && sCondVar;
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}
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void CleanUpWidgetTracing()
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{
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delete sMutex;
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delete sCondVar;
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sMutex = NULL;
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sCondVar = NULL;
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}
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// This function is called from the background tracer thread.
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bool FireAndWaitForTracerEvent()
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{
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NS_ABORT_IF_FALSE(sMutex && sCondVar, "Tracing not initialized!");
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// Send a default-priority idle event through the
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// event loop, and wait for it to finish.
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MutexAutoLock lock(*sMutex);
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NS_ABORT_IF_FALSE(!sTracerProcessed, "Tracer synchronization state is wrong");
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g_idle_add_full(G_PRIORITY_DEFAULT,
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TracerCallback,
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NULL,
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NULL);
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while (!sTracerProcessed)
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sCondVar->Wait();
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sTracerProcessed = false;
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return true;
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}
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void SignalTracerThread()
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{
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if (!sMutex || !sCondVar)
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return;
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MutexAutoLock lock(*sMutex);
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NS_ABORT_IF_FALSE(!sTracerProcessed, "Tracer synchronization state is wrong");
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sTracerProcessed = true;
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sCondVar->Notify();
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}
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} // namespace mozilla
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