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/idle.hxx>
  26 #include <vcl/svapp.hxx>
  27
  28
  29 namespace svtools {
  30
  31 void AsynchronLink::CreateMutex()
  32 {
  33     if( !_pMutex ) _pMutex = new osl::Mutex;
  34 }
  35
  36 void AsynchronLink::Call( void* pObj, bool
  37 #ifdef DBG_UTIL
  38 bAllowDoubles
  39 #endif
  40 , bool bUseTimer )
  41 {
  42 #ifdef DBG_UTIL
  43     if ( bUseTimer || !_bInCall )
  44         DBG_WARNING( "Recursives Call. Eher ueber Timer. TLX Fragen" );
  45 #endif
  46     if( _aLink.IsSet() )
  47     {
  48         _pArg = pObj;
  49         DBG_ASSERT( bAllowDoubles ||
  50                     ( !_nEventId && ( !_pIdle || !_pIdle->IsActive() ) ),
  51                     "Schon ein Call unterwegs" );
  52         ClearPendingCall();
  53         if( bUseTimer )
  54         {
  55             if( !_pIdle )
  56             {
  57                 _pIdle = new Idle;
  58                 _pIdle->SetPriority( SchedulerPriority::HIGHEST );
  59                 _pIdle->SetIdleHdl( LINK(
  60                     this, AsynchronLink, HandleCall_Idle) );
  61             }
  62             _pIdle->Start();
  63         }
  64         else
  65         {
  66             if( _pMutex ) _pMutex->acquire();
  67             _nEventId = Application::PostUserEvent( LINK( this, AsynchronLink, HandleCall_PostUserEvent), 0 );
  68             if( _pMutex ) _pMutex->release();
  69         }
  70     }
  71 }
  72
  73 AsynchronLink::~AsynchronLink()
  74 {
  75     if( _nEventId )
  76     {
  77         Application::RemoveUserEvent( _nEventId );
  78     }
  79     delete _pIdle;
  80     if( _pDeleted ) *_pDeleted = true;
  81     delete _pMutex;
  82 }
  83
  84 IMPL_LINK_NOARG_TYPED( AsynchronLink, HandleCall_Idle, Idle*, void )
  85 {
  86     if( _pMutex ) _pMutex->acquire();
  87     _nEventId = 0;
  88     if( _pMutex ) _pMutex->release();
  89     Call_Impl( _pArg );
  90 }
  91
  92 IMPL_LINK_NOARG( AsynchronLink, HandleCall_PostUserEvent )
  93 {
  94     HandleCall_Idle(nullptr);
  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( _pIdle ) _pIdle->Stop();
 108 }
 109
 110 void AsynchronLink::Call_Impl( void* pArg )
 111 {
 112     _bInCall = true;
 113     bool bDeleted = false;
 114     _pDeleted = &bDeleted;
 115     _aLink.Call( pArg );
 116     if( !bDeleted )
 117     {
 118         _bInCall = false;
 119         _pDeleted = 0;
 120     }
 121 }
 122
 123 }
 124
 125 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */