LCOV - code coverage report
Current view: top level - libreoffice/canvas/source/tools - elapsedtime.cxx (source / functions) Hit Total Coverage
Test: libreoffice_filtered.info Lines: 0 50 0.0 %
Date: 2012-12-27 Functions: 0 12 0.0 %
Legend: Lines: hit not hit

          Line data    Source code
       1             : /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
       2             : /*
       3             :  * This file is part of the LibreOffice project.
       4             :  *
       5             :  * This Source Code Form is subject to the terms of the Mozilla Public
       6             :  * License, v. 2.0. If a copy of the MPL was not distributed with this
       7             :  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
       8             :  *
       9             :  * This file incorporates work covered by the following license notice:
      10             :  *
      11             :  *   Licensed to the Apache Software Foundation (ASF) under one or more
      12             :  *   contributor license agreements. See the NOTICE file distributed
      13             :  *   with this work for additional information regarding copyright
      14             :  *   ownership. The ASF licenses this file to you under the Apache
      15             :  *   License, Version 2.0 (the "License"); you may not use this file
      16             :  *   except in compliance with the License. You may obtain a copy of
      17             :  *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
      18             :  */
      19             : 
      20             : 
      21             : #include "osl/time.h"
      22             : #include "osl/diagnose.h"
      23             : #include "canvas/elapsedtime.hxx"
      24             : 
      25             : #if defined(WNT)
      26             : 
      27             : #if defined _MSC_VER
      28             : #pragma warning(push,1)
      29             : #endif
      30             : 
      31             : // TEMP!!!
      32             : // Awaiting corresponding functionality in OSL
      33             : //
      34             : #define WIN32_LEAN_AND_MEAN
      35             : #include <windows.h>
      36             : #include <winbase.h>
      37             : #include <mmsystem.h>
      38             : #endif
      39             : 
      40             : #if defined _MSC_VER
      41             : #pragma warning(pop)
      42             : #endif
      43             : 
      44             : #include <algorithm>
      45             : #include <limits>
      46             : 
      47             : namespace canvas {
      48             : namespace tools {
      49             : 
      50             : 
      51             : #if defined(WNT)
      52             : // TODO(Q2): is 0 okay for the failure case here?
      53             : double ElapsedTime::getSystemTime()
      54             : {
      55             :     // TEMP!!!
      56             :     // Awaiting corresponding functionality in OSL
      57             :     //
      58             : 
      59             :     // is there a performance counter available?
      60             :     static bool bTimeSetupDone( false );
      61             :     static bool bPerfTimerAvailable( false );
      62             :     static LONGLONG nPerfCountFreq;
      63             : 
      64             :     // TODO(F1): This _might_ cause problems, as it prevents correct
      65             :     // time handling for very long lifetimes of this class's
      66             :     // surrounding component in memory. When the difference between
      67             :     // current sys time and nInitialCount exceeds IEEE double's
      68             :     // mantissa, time will start to run jerky.
      69             :     static LONGLONG nInitialCount;
      70             : 
      71             :     if( !bTimeSetupDone )
      72             :     {
      73             :         if( QueryPerformanceFrequency(
      74             :                 reinterpret_cast<LARGE_INTEGER *>(&nPerfCountFreq) ) )
      75             :         {
      76             :             // read initial time:
      77             :             QueryPerformanceCounter(
      78             :                 reinterpret_cast<LARGE_INTEGER *>(&nInitialCount) );
      79             :             bPerfTimerAvailable = true;
      80             :         }
      81             :         bTimeSetupDone = true;
      82             :     }
      83             : 
      84             :     if( bPerfTimerAvailable )
      85             :     {
      86             :         LONGLONG nCurrCount;
      87             :         QueryPerformanceCounter(
      88             :             reinterpret_cast<LARGE_INTEGER *>(&nCurrCount) );
      89             :         nCurrCount -= nInitialCount;
      90             :         return double(nCurrCount) / nPerfCountFreq;
      91             :     }
      92             :     else
      93             :     {
      94             :         LONGLONG nCurrTime = timeGetTime();
      95             :         return double(nCurrTime) / 1000.0;
      96             :     }
      97             : }
      98             : 
      99             : #else // ! WNT
     100             : 
     101             : // TODO(Q2): is 0 okay for the failure case here?
     102           0 : double ElapsedTime::getSystemTime()
     103             : {
     104             :     TimeValue aTimeVal;
     105           0 :     if( osl_getSystemTime( &aTimeVal ) )
     106           0 :         return ((aTimeVal.Nanosec * 10e-10) + aTimeVal.Seconds);
     107             :     else
     108           0 :         return 0.0;
     109             : }
     110             : 
     111             : #endif
     112             : 
     113           0 : ElapsedTime::ElapsedTime()
     114             :     : m_pTimeBase(),
     115             :       m_fLastQueriedTime( 0.0 ),
     116           0 :       m_fStartTime( getSystemTime() ),
     117             :       m_fFrozenTime( 0.0 ),
     118             :       m_bInPauseMode( false ),
     119           0 :       m_bInHoldMode( false )
     120             : {
     121           0 : }
     122             : 
     123           0 : ElapsedTime::ElapsedTime(
     124             :     boost::shared_ptr<ElapsedTime> const & pTimeBase )
     125             :     : m_pTimeBase( pTimeBase ),
     126             :       m_fLastQueriedTime( 0.0 ),
     127           0 :       m_fStartTime( getCurrentTime() ),
     128             :       m_fFrozenTime( 0.0 ),
     129             :       m_bInPauseMode( false ),
     130           0 :       m_bInHoldMode( false )
     131             : {
     132           0 : }
     133             : 
     134           0 : void ElapsedTime::reset()
     135             : {
     136           0 :     m_fLastQueriedTime = 0.0;
     137           0 :     m_fStartTime = getCurrentTime();
     138           0 :     m_fFrozenTime = 0.0;
     139           0 :     m_bInPauseMode = false;
     140           0 :     m_bInHoldMode = false;
     141           0 : }
     142             : 
     143           0 : void ElapsedTime::adjustTimer( double fOffset, bool /*bLimitToLastQueriedTime*/ )
     144             : {
     145             :     // to make getElapsedTime() become _larger_, have to reduce
     146             :     // m_fStartTime.
     147           0 :     m_fStartTime -= fOffset;
     148             : 
     149             :     // also adjust frozen time, this method must _always_ affect the
     150             :     // value returned by getElapsedTime()!
     151           0 :     if (m_bInHoldMode || m_bInPauseMode)
     152           0 :         m_fFrozenTime += fOffset;
     153           0 : }
     154             : 
     155           0 : double ElapsedTime::getCurrentTime() const
     156             : {
     157           0 :     return m_pTimeBase.get() == 0
     158           0 :         ? getSystemTime() : m_pTimeBase->getElapsedTimeImpl();
     159             : }
     160             : 
     161           0 : double ElapsedTime::getElapsedTime() const
     162             : {
     163           0 :     m_fLastQueriedTime = getElapsedTimeImpl();
     164           0 :     return m_fLastQueriedTime;
     165             : }
     166             : 
     167           0 : double ElapsedTime::getElapsedTimeImpl() const
     168             : {
     169           0 :     if (m_bInHoldMode || m_bInPauseMode)
     170           0 :         return m_fFrozenTime;
     171             : 
     172           0 :     return getCurrentTime() - m_fStartTime;
     173             : }
     174             : 
     175           0 : void ElapsedTime::pauseTimer()
     176             : {
     177           0 :     m_fFrozenTime = getElapsedTimeImpl();
     178           0 :     m_bInPauseMode = true;
     179           0 : }
     180             : 
     181           0 : void ElapsedTime::continueTimer()
     182             : {
     183           0 :     m_bInPauseMode = false;
     184             : 
     185             :     // stop pausing, time runs again. Note that
     186             :     // getElapsedTimeImpl() honors hold mode, i.e. a
     187             :     // continueTimer() in hold mode will preserve the latter
     188           0 :     const double fPauseDuration( getElapsedTimeImpl() - m_fFrozenTime );
     189             : 
     190             :     // adjust start time, such that subsequent getElapsedTime() calls
     191             :     // will virtually start from m_fFrozenTime.
     192           0 :     m_fStartTime += fPauseDuration;
     193           0 : }
     194             : 
     195           0 : void ElapsedTime::holdTimer()
     196             : {
     197             :     // when called during hold mode (e.g. more than once per time
     198             :     // object), the original hold time will be maintained.
     199           0 :     m_fFrozenTime = getElapsedTimeImpl();
     200           0 :     m_bInHoldMode = true;
     201           0 : }
     202             : 
     203           0 : void ElapsedTime::releaseTimer()
     204             : {
     205           0 :     m_bInHoldMode = false;
     206           0 : }
     207             : 
     208             : } // namespace tools
     209             : } // namespace canvas
     210             : 
     211             : /* vim:set shiftwidth=4 softtabstop=4 expandtab: */

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