1 files changed, 100 insertions, 0 deletions
diff --git a/svtools/source/control/asynclink.cxx b/svtools/source/control/asynclink.cxx
new file mode 100644
index 000000000..31a7b28e7
--- /dev/null
+++ b/svtools/source/control/asynclink.cxx
@@ -0,0 +1,100 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   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 .
+ */
+
+
+#include <svtools/asynclink.hxx>
+#include <osl/mutex.hxx>
+#include <sal/log.hxx>
+#include <tools/debug.hxx>
+#include <vcl/timer.hxx>
+#include <vcl/idle.hxx>
+#include <vcl/svapp.hxx>
+
+
+namespace svtools {
+
+void AsynchronLink::CreateMutex()
+{
+    if( !_pMutex ) _pMutex.reset( new osl::Mutex );
+}
+
+void AsynchronLink::Call( void* pObj, bool bAllowDoubles )
+{
+    SAL_INFO_IF( !_bInCall, "svtools", "Recursives Call. Eher ueber Timer. TLX Fragen" ); // Do NOT translate. This is a valuable historical artefact.
+    if( _aLink.IsSet() )
+    {
+        _pArg = pObj;
+        DBG_ASSERT( bAllowDoubles ||  !_nEventId, "Already made a call" );
+        ClearPendingCall();
+        if( _pMutex ) _pMutex->acquire();
+        _nEventId = Application::PostUserEvent( LINK( this, AsynchronLink, HandleCall_PostUserEvent) );
+        if( _pMutex ) _pMutex->release();
+    }
+}
+
+AsynchronLink::~AsynchronLink()
+{
+    if( _nEventId )
+    {
+        Application::RemoveUserEvent( _nEventId );
+    }
+    if( _pDeleted ) *_pDeleted = true;
+    _pMutex.reset();
+}
+
+IMPL_LINK_NOARG( AsynchronLink, HandleCall_Idle, Timer*, void )
+{
+    if( _pMutex ) _pMutex->acquire();
+    _nEventId = nullptr;
+    if( _pMutex ) _pMutex->release();
+    Call_Impl( _pArg );
+}
+
+IMPL_LINK_NOARG( AsynchronLink, HandleCall_PostUserEvent, void*, void )
+{
+    HandleCall_Idle(nullptr);
+}
+
+void AsynchronLink::ClearPendingCall()
+{
+    if( _pMutex ) _pMutex->acquire();
+    if( _nEventId )
+    {
+        Application::RemoveUserEvent( _nEventId );
+        _nEventId = nullptr;
+    }
+    if( _pMutex ) _pMutex->release();
+}
+
+void AsynchronLink::Call_Impl( void* pArg )
+{
+    _bInCall = true;
+    bool bDeleted = false;
+    _pDeleted = &bDeleted;
+    _aLink.Call( pArg );
+    if( !bDeleted )
+    {
+        _bInCall = false;
+        _pDeleted = nullptr;
+    }
+}
+
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */