#82391#

1 files changed, 156 insertions, 0 deletions

diff --git a/dbaccess/source/ui/browser/AsyncronousLink.cxx b/dbaccess/source/ui/browser/AsyncronousLink.cxx
new file mode 100644
index 000000000000..248b2d0e9cc6
--- /dev/null
+++ b/dbaccess/source/ui/browser/AsyncronousLink.cxx
@@ -0,0 +1,156 @@
+/*************************************************************************
+ *
+ *  $RCSfile: AsyncronousLink.cxx,v $
+ *
+ *  $Revision: 1.1 $
+ *
+ *  last change: $Author: oj $ $Date: 2001-01-09 15:42:43 $
+ *
+ *  The Contents of this file are made available subject to the terms of
+ *  either of the following licenses
+ *
+ *         - GNU Lesser General Public License Version 2.1
+ *         - Sun Industry Standards Source License Version 1.1
+ *
+ *  Sun Microsystems Inc., October, 2000
+ *
+ *  GNU Lesser General Public License Version 2.1
+ *  =============================================
+ *  Copyright 2000 by Sun Microsystems, Inc.
+ *  901 San Antonio Road, Palo Alto, CA 94303, USA
+ *
+ *  This library is free software; you can redistribute it and/or
+ *  modify it under the terms of the GNU Lesser General Public
+ *  License version 2.1, as published by the Free Software Foundation.
+ *
+ *  This library is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ *  Lesser General Public License for more details.
+ *
+ *  You should have received a copy of the GNU Lesser General Public
+ *  License along with this library; if not, write to the Free Software
+ *  Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ *  MA  02111-1307  USA
+ *
+ *
+ *  Sun Industry Standards Source License Version 1.1
+ *  =================================================
+ *  The contents of this file are subject to the Sun Industry Standards
+ *  Source License Version 1.1 (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.openoffice.org/license.html.
+ *
+ *  Software provided under this License is provided on an AS IS basis,
+ *  WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING,
+ *  WITHOUT LIMITATION, WARRANTIES THAT THE SOFTWARE IS FREE OF DEFECTS,
+ *  MERCHANTABLE, FIT FOR A PARTICULAR PURPOSE, OR NON-INFRINGING.
+ *  See the License for the specific provisions governing your rights and
+ *  obligations concerning the Software.
+ *
+ *  The Initial Developer of the Original Code is: Sun Microsystems, Inc.
+ *
+ *  Copyright: 2000 by Sun Microsystems, Inc.
+ *
+ *  All Rights Reserved.
+ *
+ *  Contributor(s): _______________________________________
+ *
+ *
+ ************************************************************************/
+#ifndef DBAUI_ASYNCRONOUSLINK_HXX
+#include "AsyncronousLink.hxx"
+#endif
+#ifndef _SV_SVAPP_HXX
+#include <vcl/svapp.hxx>
+#endif
+//==================================================================
+//= OAsyncronousLink
+//==================================================================
+using namespace dbaui;
+//------------------------------------------------------------------
+OAsyncronousLink::OAsyncronousLink(const Link& _rHandler, NAMESPACE_VOS(OMutex)* _pEventSafety, NAMESPACE_VOS(OMutex)* _pDestructionSafety)
+    :m_aHandler(_rHandler)
+    ,m_pEventSafety(NULL)
+    ,m_pDestructionSafety(NULL)
+    ,m_bOwnMutexes(FALSE)
+    ,m_nEventId(0)
+{
+    if (_pEventSafety && _pDestructionSafety)
+    {
+        m_pEventSafety = _pEventSafety;
+        m_pDestructionSafety = _pDestructionSafety;
+        m_bOwnMutexes = FALSE;
+    }
+    else
+    {
+        m_pEventSafety = new ::vos::OMutex;
+        m_pDestructionSafety = new ::vos::OMutex;
+        m_bOwnMutexes = TRUE;
+    }
+}
+
+//------------------------------------------------------------------
+OAsyncronousLink::~OAsyncronousLink()
+{
+    {
+        ::vos::OGuard aEventGuard(*m_pEventSafety);
+        if (m_nEventId)
+            Application::RemoveUserEvent(m_nEventId);
+        m_nEventId = 0;
+    }
+
+    {
+        ::vos::OGuard aDestructionGuard(*m_pDestructionSafety);
+        // 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.
+    }
+    if (m_bOwnMutexes)
+    {
+        delete m_pEventSafety;
+        delete m_pDestructionSafety;
+    }
+    m_pEventSafety = NULL;
+    m_pDestructionSafety = NULL;
+}
+
+
+//------------------------------------------------------------------
+void OAsyncronousLink::Call(void* _pArgument)
+{
+    ::vos::OGuard aEventGuard(*m_pEventSafety);
+    if (m_nEventId)
+        Application::RemoveUserEvent(m_nEventId);
+    m_nEventId = Application::PostUserEvent(LINK(this, OAsyncronousLink, OnAsyncCall));
+}
+
+//------------------------------------------------------------------
+void OAsyncronousLink::CancelCall()
+{
+    ::vos::OGuard aEventGuard(*m_pEventSafety);
+    if (m_nEventId)
+        Application::RemoveUserEvent(m_nEventId);
+    m_nEventId = 0;
+}
+
+//------------------------------------------------------------------
+IMPL_LINK(OAsyncronousLink, OnAsyncCall, void*, _pArg)
+{
+    {
+        ::vos::OGuard aDestructionGuard(*m_pDestructionSafety);
+        {
+            ::vos::OGuard aEventGuard(*m_pEventSafety);
+            if (!m_nEventId)
+                // our destructor deleted the event just while we we're waiting for m_pEventSafety
+                // -> get outta here
+                return 0;
+            m_nEventId = 0;
+        }
+    }
+    if (m_aHandler.IsSet())
+        return m_aHandler.Call(_pArg);
+
+    return 0L;
+}