| /************************************************************** |
| * |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| * |
| *************************************************************/ |
| |
| |
| |
| // MARKER(update_precomp.py): autogen include statement, do not remove |
| #include "precompiled_dbaccess.hxx" |
| #ifndef DBAUI_ASYNCRONOUSLINK_HXX |
| #include "AsyncronousLink.hxx" |
| #endif |
| #ifndef _SV_SVAPP_HXX |
| #include <vcl/svapp.hxx> |
| #endif |
| #ifndef _TOOLS_DEBUG_HXX |
| #include <tools/debug.hxx> |
| #endif |
| |
| //================================================================== |
| //= OAsyncronousLink |
| //================================================================== |
| using namespace dbaui; |
| DBG_NAME(OAsyncronousLink) |
| //------------------------------------------------------------------ |
| OAsyncronousLink::OAsyncronousLink( const Link& _rHandler ) |
| :m_aHandler(_rHandler) |
| ,m_aEventSafety() |
| ,m_aDestructionSafety() |
| ,m_nEventId(0) |
| { |
| DBG_CTOR(OAsyncronousLink,NULL); |
| } |
| |
| //------------------------------------------------------------------ |
| OAsyncronousLink::~OAsyncronousLink() |
| { |
| { |
| ::osl::MutexGuard aEventGuard( m_aEventSafety ); |
| if ( m_nEventId ) |
| Application::RemoveUserEvent(m_nEventId); |
| m_nEventId = 0; |
| } |
| |
| { |
| ::osl::MutexGuard aDestructionGuard( m_aDestructionSafety ); |
| // this is just for the case we're deleted while another thread just handled the event : |
| // if this other thread called our link while we were deleting the event here, the |
| // link handler blocked. With leaving the above block it continued, but now we are prevented |
| // to leave this destructor 'til the link handler recognizes that nEvent == 0 and leaves. |
| } |
| DBG_DTOR(OAsyncronousLink,NULL); |
| } |
| |
| |
| //------------------------------------------------------------------ |
| void OAsyncronousLink::Call( void* _pArgument ) |
| { |
| ::osl::MutexGuard aEventGuard( m_aEventSafety ); |
| if (m_nEventId) |
| Application::RemoveUserEvent(m_nEventId); |
| m_nEventId = Application::PostUserEvent( LINK( this, OAsyncronousLink, OnAsyncCall ), _pArgument ); |
| } |
| |
| //------------------------------------------------------------------ |
| void OAsyncronousLink::CancelCall() |
| { |
| ::osl::MutexGuard aEventGuard( m_aEventSafety ); |
| if ( m_nEventId ) |
| Application::RemoveUserEvent( m_nEventId ); |
| m_nEventId = 0; |
| } |
| |
| //------------------------------------------------------------------ |
| IMPL_LINK(OAsyncronousLink, OnAsyncCall, void*, _pArg) |
| { |
| { |
| ::osl::MutexGuard aDestructionGuard( m_aDestructionSafety ); |
| { |
| ::osl::MutexGuard aEventGuard( m_aEventSafety ); |
| if (!m_nEventId) |
| // our destructor deleted the event just while we we're waiting for m_aEventSafety |
| // -> get outta here |
| return 0; |
| m_nEventId = 0; |
| } |
| } |
| if (m_aHandler.IsSet()) |
| return m_aHandler.Call(_pArg); |
| |
| return 0L; |
| } |