1 files changed, 71 insertions, 0 deletions
diff --git a/svtools/source/control/asynclink.cxx b/svtools/source/control/asynclink.cxx
new file mode 100644
index 000000000..95b8a6685
--- /dev/null
+++ b/svtools/source/control/asynclink.cxx
@@ -0,0 +1,71 @@
+/* -*- 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 <tools/debug.hxx>
+#include <vcl/svapp.hxx>
+
+
+namespace svtools {
+
+void AsynchronLink::Call( void* pObj, bool bAllowDoubles )
+{
+    if( !_aLink.IsSet() )
+        return;
+
+    _pArg = pObj;
+    DBG_ASSERT( bAllowDoubles ||  !_nEventId, "Already made a call" );
+    ClearPendingCall();
+    std::scoped_lock aGuard(_aMutex);
+    _nEventId = Application::PostUserEvent( LINK( this, AsynchronLink, HandleCall_PostUserEvent) );
+}
+
+AsynchronLink::~AsynchronLink()
+{
+    if( _nEventId )
+    {
+        Application::RemoveUserEvent( _nEventId );
+    }
+}
+
+void AsynchronLink::ClearPendingCall()
+{
+    std::scoped_lock aGuard(_aMutex);
+    if( _nEventId )
+    {
+        Application::RemoveUserEvent( _nEventId );
+        _nEventId = nullptr;
+    }
+}
+
+IMPL_LINK_NOARG( AsynchronLink, HandleCall_PostUserEvent, void*, void )
+{
+    {
+        std::scoped_lock aGuard(_aMutex);
+        _nEventId = nullptr;
+        // need to release the lock before calling the client since
+        // the client may call back into us
+    }
+    _aLink.Call( _pArg );
+}
+
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */