svtools/source/control/asynclink.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
  21 #include <svtools/asynclink.hxx>
  22 #include <osl/mutex.hxx>
  23 #include <tools/debug.hxx>
  24 #include <vcl/timer.hxx>
  25 #include <vcl/svapp.hxx>
  26
  27 //--------------------------------------------------------------------
  28 namespace svtools {
  29
  30 void AsynchronLink::CreateMutex()
  31 {
  32     if( !_pMutex ) _pMutex = new osl::Mutex;
  33 }
  34
  35 void AsynchronLink::Call( void* pObj, sal_Bool
  36 #ifdef DBG_UTIL
  37 bAllowDoubles
  38 #endif
  39 , sal_Bool bUseTimer )
  40 {
  41 #ifdef DBG_UTIL
  42     if ( bUseTimer || !_bInCall )
  43         DBG_WARNING( "Recursives Call. Eher ueber Timer. TLX Fragen" );
  44 #endif
  45     if( _aLink.IsSet() )
  46     {
  47         _pArg = pObj;
  48         DBG_ASSERT( bAllowDoubles ||
  49                     ( !_nEventId && ( !_pTimer || !_pTimer->IsActive() ) ),
  50                     "Schon ein Call unterwegs" );
  51         if( _nEventId )
  52         {
  53             if( _pMutex ) _pMutex->acquire();
  54             Application::RemoveUserEvent( _nEventId );
  55             if( _pMutex ) _pMutex->release();
  56         }
  57         if( _pTimer )_pTimer->Stop();
  58         if( bUseTimer )
  59         {
  60             if( !_pTimer )
  61             {
  62                 _pTimer = new Timer;
  63                 _pTimer->SetTimeout( 0 );
  64                 _pTimer->SetTimeoutHdl( STATIC_LINK(
  65                     this, AsynchronLink, HandleCall) );
  66             }
  67             _pTimer->Start();
  68         }
  69         else
  70         {
  71             if( _pMutex ) _pMutex->acquire();
  72             Application::PostUserEvent( _nEventId, STATIC_LINK( this, AsynchronLink, HandleCall), 0 );
  73             if( _pMutex ) _pMutex->release();
  74         }
  75     }
  76 }
  77
  78 AsynchronLink::~AsynchronLink()
  79 {
  80     if( _nEventId )
  81     {
  82         Application::RemoveUserEvent( _nEventId );
  83     }
  84     delete _pTimer;
  85     if( _pDeleted ) *_pDeleted = sal_True;
  86     delete _pMutex;
  87 }
  88
  89 IMPL_STATIC_LINK( AsynchronLink, HandleCall, void*, EMPTYARG )
  90 {
  91     if( pThis->_pMutex ) pThis->_pMutex->acquire();
  92     pThis->_nEventId = 0;
  93     if( pThis->_pMutex ) pThis->_pMutex->release();
  94     pThis->Call_Impl( pThis->_pArg );
  95     return 0;
  96 }
  97
  98 void AsynchronLink::ClearPendingCall()
  99 {
 100     if( _pMutex ) _pMutex->acquire();
 101     if( _nEventId )
 102     {
 103         Application::RemoveUserEvent( _nEventId );
 104         _nEventId = 0;
 105     }
 106     if( _pMutex ) _pMutex->release();
 107     if( _pTimer ) _pTimer->Stop();
 108 }
 109
 110 void AsynchronLink::Call_Impl( void* pArg )
 111 {
 112     _bInCall = sal_True;
 113     sal_Bool bDeleted = sal_False;
 114     _pDeleted = &bDeleted;
 115     _aLink.Call( pArg );
 116     if( !bDeleted )
 117     {
 118         _bInCall = sal_False;
 119         _pDeleted = 0;
 120     }
 121 }
 122
 123 }
 124
 125 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */