1 files changed, 164 insertions, 0 deletions
diff --git a/vcl/source/app/salusereventlist.cxx b/vcl/source/app/salusereventlist.cxx
new file mode 100644
index 000000000..1e3f78cc4
--- /dev/null
+++ b/vcl/source/app/salusereventlist.cxx
@@ -0,0 +1,164 @@
+/* -*- 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 <salusereventlist.hxx>
+#include <salwtype.hxx>
+
+#include <algorithm>
+#include <cstdlib>
+#include <exception>
+#include <typeinfo>
+
+#include <com/sun/star/uno/Exception.hpp>
+#include <tools/debug.hxx>
+#include <tools/diagnose_ex.h>
+#include <sal/log.hxx>
+#include <sal/types.h>
+#include <svdata.hxx>
+
+SalUserEventList::SalUserEventList()
+    : m_bAllUserEventProcessedSignaled( true )
+    , m_aProcessingThread(0)
+{
+}
+
+SalUserEventList::~SalUserEventList() COVERITY_NOEXCEPT_FALSE
+{
+}
+
+void SalUserEventList::insertFrame( SalFrame* pFrame )
+{
+    auto aPair = m_aFrames.insert( pFrame );
+    assert( aPair.second ); (void) aPair;
+}
+
+void SalUserEventList::eraseFrame( SalFrame* pFrame )
+{
+    auto it = m_aFrames.find( pFrame );
+    assert( it != m_aFrames.end() );
+    if ( it != m_aFrames.end() )
+        m_aFrames.erase( it );
+}
+
+bool SalUserEventList::DispatchUserEvents( bool bHandleAllCurrentEvents )
+{
+    bool bWasEvent = false;
+    oslThreadIdentifier aCurId = osl::Thread::getCurrentIdentifier();
+
+    DBG_TESTSOLARMUTEX();
+    std::unique_lock aResettableListGuard(m_aUserEventsMutex);
+
+    if (!m_aUserEvents.empty())
+    {
+        if (bHandleAllCurrentEvents)
+        {
+            if (m_aProcessingUserEvents.empty())
+                m_aProcessingUserEvents.swap(m_aUserEvents);
+            else
+                m_aProcessingUserEvents.splice(m_aProcessingUserEvents.end(), m_aUserEvents);
+        }
+        else if (m_aProcessingUserEvents.empty())
+        {
+            m_aProcessingUserEvents.push_back( m_aUserEvents.front() );
+            m_aUserEvents.pop_front();
+        }
+    }
+
+    if (HasUserEvents_NoLock())
+    {
+        bWasEvent = true;
+        m_aProcessingThread = aCurId;
+
+        SalUserEvent aEvent( nullptr, nullptr, SalEvent::NONE );
+        do {
+            if (m_aProcessingUserEvents.empty() || aCurId != m_aProcessingThread)
+                break;
+            aEvent = m_aProcessingUserEvents.front();
+            m_aProcessingUserEvents.pop_front();
+
+            // remember to reset the guard before break or continue the loop
+            aResettableListGuard.unlock();
+
+            if ( !isFrameAlive( aEvent.m_pFrame ) )
+            {
+                if ( aEvent.m_nEvent == SalEvent::UserEvent )
+                    delete static_cast< ImplSVEvent* >( aEvent.m_pData );
+                aResettableListGuard.lock();
+                continue;
+            }
+
+            /*
+            * Current policy is that scheduler tasks aren't allowed to throw an exception.
+            * Because otherwise the exception is caught somewhere totally unrelated.
+            * TODO Ideally we could capture a proper backtrace and feed this into breakpad,
+            *   which is do-able, but requires writing some assembly.
+            * See also Scheduler::CallbackTaskScheduling
+            */
+#ifdef IOS
+            ProcessEvent( aEvent );
+#else
+            // the noexcept here means that (a) we abort and (b) debuggers will
+            // likely trigger at the throw site instead of here, making the debugging
+            // experience better when something goes wrong.
+            auto process = [&aEvent, this] () noexcept { ProcessEvent(aEvent); };
+            process();
+#endif
+            aResettableListGuard.lock();
+            if (!bHandleAllCurrentEvents)
+                break;
+        }
+        while( true );
+    }
+
+    if ( !m_bAllUserEventProcessedSignaled && !HasUserEvents_NoLock() )
+    {
+        m_bAllUserEventProcessedSignaled = true;
+        TriggerAllUserEventsProcessed();
+    }
+
+    return bWasEvent;
+}
+
+void SalUserEventList::RemoveEvent( SalFrame* pFrame, void* pData, SalEvent nEvent )
+{
+    SalUserEvent aEvent( pFrame, pData, nEvent );
+
+    std::unique_lock aGuard( m_aUserEventsMutex );
+    auto it = std::find( m_aUserEvents.begin(), m_aUserEvents.end(), aEvent );
+    if ( it != m_aUserEvents.end() )
+    {
+        m_aUserEvents.erase( it );
+    }
+    else
+    {
+        it = std::find( m_aProcessingUserEvents.begin(), m_aProcessingUserEvents.end(), aEvent );
+        if ( it != m_aProcessingUserEvents.end() )
+        {
+            m_aProcessingUserEvents.erase( it );
+        }
+    }
+
+    if ( !m_bAllUserEventProcessedSignaled && !HasUserEvents_NoLock() )
+    {
+        m_bAllUserEventProcessedSignaled = true;
+        TriggerAllUserEventsProcessed();
+    }
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */