vcl/source/app/timer.cxx

   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 #include <tools/time.hxx>
  21 #include <vcl/timer.hxx>
  22 #include <saltimer.hxx>
  23 #include <svdata.hxx>
  24 #include <salinst.hxx>
  25
  26 #define MAX_TIMER_PERIOD   SAL_MAX_UINT64
  27
  28 void Timer::ImplStartTimer( ImplSVData* pSVData, sal_uInt64 nMS )
  29 {
  30     InitSystemTimer();
  31
  32     if ( !nMS )
  33         nMS = 1;
  34
  35     // Assume underlying timers are recurring timers, if same period - just wait.
  36     if ( nMS != pSVData->mnTimerPeriod )
  37     {
  38         pSVData->mnTimerPeriod = nMS;
  39         pSVData->mpSalTimer->Start( nMS );
  40     }
  41 }
  42
  43 void Timer::SetDeletionFlags()
  44 {
  45         // if no AutoTimer than stop
  46         if ( !mbAuto )
  47         {
  48             mpSchedulerData->mbDelete = true;
  49             mbActive = false;
  50         }
  51 }
  52
  53 bool Timer::ReadyForSchedule( bool bTimer )
  54 {
  55     (void)bTimer;
  56     return (mpSchedulerData->mnUpdateTime + mnTimeout) <= tools::Time::GetSystemTicks();
  57 }
  58
  59 sal_uInt64 Timer::UpdateMinPeriod( sal_uInt64 nMinPeriod, sal_uInt64 nTime )
  60 {
  61     sal_uInt64 nNewTime = tools::Time::GetSystemTicks();
  62     sal_uInt64 nDeltaTime;
  63     //determine smallest time slot
  64     if( mpSchedulerData->mnUpdateTime == nTime )
  65     {
  66        nDeltaTime = mnTimeout;
  67        if( nDeltaTime < nMinPeriod )
  68            nMinPeriod = nDeltaTime;
  69     }
  70     else
  71     {
  72         nDeltaTime = mpSchedulerData->mnUpdateTime + mnTimeout;
  73         if( nDeltaTime < nNewTime )
  74             nMinPeriod = 1;
  75         else
  76         {
  77             nDeltaTime -= nNewTime;
  78             if( nDeltaTime < nMinPeriod )
  79                 nMinPeriod = nDeltaTime;
  80         }
  81     }
  82
  83     return nMinPeriod;
  84 }
  85
  86 /**
  87  * Initialize the platform specific timer on which all the
  88  * platform independent timers are built
  89  */
  90 void Timer::InitSystemTimer()
  91 {
  92     ImplSVData* pSVData = ImplGetSVData();
  93     if( ! pSVData->mpSalTimer )
  94     {
  95         pSVData->mnTimerPeriod = MAX_TIMER_PERIOD;
  96         pSVData->mpSalTimer = pSVData->mpDefInst->CreateSalTimer();
  97         pSVData->mpSalTimer->SetCallback( CallbackTaskScheduling );
  98     }
  99 }
 100
 101 Timer::Timer(const sal_Char *pDebugName) : Scheduler(pDebugName)
 102 {
 103     mnTimeout = 1;
 104     mbAuto = false;
 105     mePriority = SchedulerPriority::HIGHEST;
 106 }
 107
 108 Timer::Timer( const Timer& rTimer ) : Scheduler(rTimer)
 109 {
 110     mnTimeout = rTimer.mnTimeout;
 111     mbAuto = rTimer.mbAuto;
 112     maTimeoutHdl = rTimer.maTimeoutHdl;
 113 }
 114
 115 void Timer::Invoke()
 116 {
 117     maTimeoutHdl.Call( this );
 118 }
 119
 120 void Timer::Start()
 121 {
 122     Scheduler::Start();
 123
 124     ImplSVData* pSVData = ImplGetSVData();
 125     if ( mnTimeout < pSVData->mnTimerPeriod )
 126         Timer::ImplStartTimer( pSVData, mnTimeout );
 127 }
 128
 129 void Timer::SetTimeout( sal_uInt64 nNewTimeout )
 130 {
 131     mnTimeout = nNewTimeout;
 132     // if timer is active then renew clock
 133     if ( mbActive )
 134     {
 135         ImplSVData* pSVData = ImplGetSVData();
 136         if ( !pSVData->mnUpdateStack && (mnTimeout < pSVData->mnTimerPeriod) )
 137             Timer::ImplStartTimer( pSVData, mnTimeout );
 138     }
 139 }
 140
 141 Timer& Timer::operator=( const Timer& rTimer )
 142 {
 143     Scheduler::operator=(rTimer);
 144     maTimeoutHdl = rTimer.maTimeoutHdl;
 145     mnTimeout = rTimer.mnTimeout;
 146     mbAuto = rTimer.mbAuto;
 147     return *this;
 148 }
 149
 150 AutoTimer::AutoTimer()
 151 {
 152     mbAuto = true;
 153 }
 154
 155 AutoTimer::AutoTimer( const AutoTimer& rTimer ) : Timer( rTimer )
 156 {
 157     mbAuto = true;
 158 }
 159
 160 AutoTimer& AutoTimer::operator=( const AutoTimer& rTimer )
 161 {
 162     Timer::operator=( rTimer );
 163     return *this;
 164 }
 165 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */