1 files changed, 112 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..157024f497f8
--- /dev/null
+++ b/dbaccess/source/ui/browser/AsyncronousLink.cxx
@@ -0,0 +1,112 @@
+/*************************************************************************
+ *
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * Copyright 2000, 2010 Oracle and/or its affiliates.
+ *
+ * OpenOffice.org - a multi-platform office productivity suite
+ *
+ * This file is part of OpenOffice.org.
+ *
+ * OpenOffice.org is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License version 3
+ * only, as published by the Free Software Foundation.
+ *
+ * OpenOffice.org 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 version 3 for more details
+ * (a copy is included in the LICENSE file that accompanied this code).
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * version 3 along with OpenOffice.org.  If not, see
+ * <http://www.openoffice.org/license.html>
+ * for a copy of the LGPLv3 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;
+}