LCOV - code coverage report
Current view: directory - widget/gtk2 - WidgetTraceEvent.cpp (source / functions) Found Hit Coverage
Test: app.info Lines: 29 0 0.0 %
Date: 2012-06-02 Functions: 5 0 0.0 %

       1                 : /* ***** BEGIN LICENSE BLOCK *****
       2                 :  * Version: MPL 1.1/GPL 2.0/LGPL 2.1
       3                 :  *
       4                 :  * The contents of this file are subject to the Mozilla Public License Version
       5                 :  * 1.1 (the "License"); you may not use this file except in compliance with
       6                 :  * the License. You may obtain a copy of the License at
       7                 :  * http://www.mozilla.org/MPL/
       8                 :  *
       9                 :  * Software distributed under the License is distributed on an "AS IS" basis,
      10                 :  * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
      11                 :  * for the specific language governing rights and limitations under the
      12                 :  * License.
      13                 :  *
      14                 :  * The Original Code is mozilla.org code.
      15                 :  *
      16                 :  * The Initial Developer of the Original Code is
      17                 :  * The Mozilla Foundation.
      18                 :  * Portions created by the Initial Developer are Copyright (C) 2011
      19                 :  * the Initial Developer. All Rights Reserved.
      20                 :  *
      21                 :  * Contributor(s):
      22                 :  *   Ted Mielczarek <ted.mielczarek@gmail.com>
      23                 :  *
      24                 :  * Alternatively, the contents of this file may be used under the terms of
      25                 :  * either the GNU General Public License Version 2 or later (the "GPL"), or
      26                 :  * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
      27                 :  * in which case the provisions of the GPL or the LGPL are applicable instead
      28                 :  * of those above. If you wish to allow use of your version of this file only
      29                 :  * under the terms of either the GPL or the LGPL, and not to allow others to
      30                 :  * use your version of this file under the terms of the MPL, indicate your
      31                 :  * decision by deleting the provisions above and replace them with the notice
      32                 :  * and other provisions required by the GPL or the LGPL. If you do not delete
      33                 :  * the provisions above, a recipient may use your version of this file under
      34                 :  * the terms of any one of the MPL, the GPL or the LGPL.
      35                 :  *
      36                 :  * ***** END LICENSE BLOCK ***** */
      37                 : 
      38                 : #include "mozilla/WidgetTraceEvent.h"
      39                 : 
      40                 : #include <glib.h>
      41                 : #include <mozilla/CondVar.h>
      42                 : #include <mozilla/Mutex.h>
      43                 : #include <stdio.h>
      44                 : 
      45                 : using mozilla::CondVar;
      46                 : using mozilla::Mutex;
      47                 : using mozilla::MutexAutoLock;
      48                 : 
      49                 : namespace {
      50                 : 
      51                 : Mutex* sMutex = NULL;
      52                 : CondVar* sCondVar = NULL;
      53                 : bool sTracerProcessed = false;
      54                 : 
      55                 : // This function is called from the main (UI) thread.
      56               0 : gboolean TracerCallback(gpointer data)
      57                 : {
      58               0 :   mozilla::SignalTracerThread();
      59               0 :   return FALSE;
      60                 : }
      61                 : 
      62                 : } // namespace
      63                 : 
      64                 : namespace mozilla {
      65                 : 
      66               0 : bool InitWidgetTracing()
      67                 : {
      68               0 :   sMutex = new Mutex("Event tracer thread mutex");
      69               0 :   sCondVar = new CondVar(*sMutex, "Event tracer thread condvar");
      70               0 :   return sMutex && sCondVar;
      71                 : }
      72                 : 
      73               0 : void CleanUpWidgetTracing()
      74                 : {
      75               0 :   delete sMutex;
      76               0 :   delete sCondVar;
      77               0 :   sMutex = NULL;
      78               0 :   sCondVar = NULL;
      79               0 : }
      80                 : 
      81                 : // This function is called from the background tracer thread.
      82               0 : bool FireAndWaitForTracerEvent()
      83                 : {
      84               0 :   NS_ABORT_IF_FALSE(sMutex && sCondVar, "Tracing not initialized!");
      85                 : 
      86                 :   // Send a default-priority idle event through the
      87                 :   // event loop, and wait for it to finish.
      88               0 :   MutexAutoLock lock(*sMutex);
      89               0 :   NS_ABORT_IF_FALSE(!sTracerProcessed, "Tracer synchronization state is wrong");
      90                 :   g_idle_add_full(G_PRIORITY_DEFAULT,
      91                 :                   TracerCallback,
      92                 :                   NULL,
      93               0 :                   NULL);
      94               0 :   while (!sTracerProcessed)
      95               0 :     sCondVar->Wait();
      96               0 :   sTracerProcessed = false;
      97               0 :   return true;
      98                 : }
      99                 : 
     100               0 : void SignalTracerThread()
     101                 : {
     102               0 :   if (!sMutex || !sCondVar)
     103               0 :     return;
     104               0 :   MutexAutoLock lock(*sMutex);
     105               0 :   NS_ABORT_IF_FALSE(!sTracerProcessed, "Tracer synchronization state is wrong");
     106               0 :   sTracerProcessed = true;
     107               0 :   sCondVar->Notify();
     108                 : }
     109                 : 
     110                 : }  // namespace mozilla

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