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 <sal/log.hxx>
  24 #include <tools/debug.hxx>
  25 #include <vcl/timer.hxx>
  26 #include <vcl/idle.hxx>
  27 #include <vcl/svapp.hxx>
  28
  29
  30 namespace svtools {
  31
  32 void AsynchronLink::CreateMutex()
  33 {
  34     if( !_pMutex ) _pMutex.reset( new osl::Mutex );
  35 }
  36
  37 void AsynchronLink::Call( void* pObj, bool bAllowDoubles )
  38 {
  39     SAL_INFO_IF( !_bInCall, "svtools", "Recursives Call. Eher ueber Timer. TLX Fragen" ); // Do NOT translate. This is a valuable historical artefact.
  40     if( _aLink.IsSet() )
  41     {
  42         _pArg = pObj;
  43         DBG_ASSERT( bAllowDoubles ||  !_nEventId, "Already made a call" );
  44         ClearPendingCall();
  45         if( _pMutex ) _pMutex->acquire();
  46         _nEventId = Application::PostUserEvent( LINK( this, AsynchronLink, HandleCall_PostUserEvent) );
  47         if( _pMutex ) _pMutex->release();
  48     }
  49 }
  50
  51 AsynchronLink::~AsynchronLink()
  52 {
  53     if( _nEventId )
  54     {
  55         Application::RemoveUserEvent( _nEventId );
  56     }
  57     if( _pDeleted ) *_pDeleted = true;
  58     _pMutex.reset();
  59 }
  60
  61 IMPL_LINK_NOARG( AsynchronLink, HandleCall_Idle, Timer*, void )
  62 {
  63     if( _pMutex ) _pMutex->acquire();
  64     _nEventId = nullptr;
  65     if( _pMutex ) _pMutex->release();
  66     Call_Impl( _pArg );
  67 }
  68
  69 IMPL_LINK_NOARG( AsynchronLink, HandleCall_PostUserEvent, void*, void )
  70 {
  71     HandleCall_Idle(nullptr);
  72 }
  73
  74 void AsynchronLink::ClearPendingCall()
  75 {
  76     if( _pMutex ) _pMutex->acquire();
  77     if( _nEventId )
  78     {
  79         Application::RemoveUserEvent( _nEventId );
  80         _nEventId = nullptr;
  81     }
  82     if( _pMutex ) _pMutex->release();
  83 }
  84
  85 void AsynchronLink::Call_Impl( void* pArg )
  86 {
  87     _bInCall = true;
  88     bool bDeleted = false;
  89     _pDeleted = &bDeleted;
  90     _aLink.Call( pArg );
  91     if( !bDeleted )
  92     {
  93         _bInCall = false;
  94         _pDeleted = nullptr;
  95     }
  96 }
  97
  98 }
  99
 100 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */