1 files changed, 199 insertions, 0 deletions
diff --git a/vcl/win/app/saltimer.cxx b/vcl/win/app/saltimer.cxx
new file mode 100644
index 000000000..5a4760ad5
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+++ b/vcl/win/app/saltimer.cxx
@@ -0,0 +1,199 @@
+/* -*- 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 <sal/config.h>
+#include <sal/log.hxx>
+
+#include <tools/time.hxx>
+
+#include <svsys.h>
+#include <win/saldata.hxx>
+#include <win/saltimer.h>
+#include <win/salinst.h>
+
+void CALLBACK SalTimerProc(PVOID pParameter, BOOLEAN bTimerOrWaitFired);
+
+// See http://msdn.microsoft.com/en-us/library/windows/desktop/ms687003%28v=vs.85%29.aspx
+// (and related pages) for details about the Timer Queues.
+
+// in order to prevent concurrent execution of ImplSalStartTimer and double
+// deletion of timer (which is extremely likely, given that
+// INVALID_HANDLE_VALUE waits for the callback to run on the main thread),
+// this must run on the main thread too
+void WinSalTimer::ImplStop()
+{
+    SalData *const pSalData = GetSalData();
+    const WinSalInstance *pInst = pSalData->mpInstance;
+    assert( !pInst || pSalData->mnAppThreadId == GetCurrentThreadId() );
+
+    if ( m_bSetTimerRunning )
+    {
+        m_bSetTimerRunning = false;
+        KillTimer( GetSalData()->mpInstance->mhComWnd, m_aWmTimerId );
+    }
+    m_bDirectTimeout = false;
+
+    const HANDLE hTimer = m_nTimerId;
+    if ( nullptr == hTimer )
+        return;
+
+    m_nTimerId = nullptr;
+    DeleteTimerQueueTimer( nullptr, hTimer, INVALID_HANDLE_VALUE );
+    // Keep InvalidateEvent after DeleteTimerQueueTimer, because the event id
+    // is set in SalTimerProc, which DeleteTimerQueueTimer will finish or cancel.
+    InvalidateEvent();
+}
+
+void WinSalTimer::ImplStart( sal_uInt64 nMS )
+{
+    SalData* pSalData = GetSalData();
+    assert( !pSalData->mpInstance || pSalData->mnAppThreadId == GetCurrentThreadId() );
+
+    // DueTime parameter is a DWORD, which is always an unsigned 32bit
+    if (nMS > SAL_MAX_UINT32)
+        nMS = SAL_MAX_UINT32;
+
+    // cannot change a one-shot timer, so delete it and create a new one
+    ImplStop();
+
+    // directly indicate an elapsed timer
+    m_bDirectTimeout = ( 0 == nMS );
+    // probably WT_EXECUTEONLYONCE is not needed, but it enforces Period
+    // to be 0 and should not hurt; also see
+    // https://www.microsoft.com/msj/0499/pooling/pooling.aspx
+    if ( !m_bDirectTimeout )
+        CreateTimerQueueTimer(&m_nTimerId, nullptr, SalTimerProc, this,
+                              nMS, 0, WT_EXECUTEINTIMERTHREAD | WT_EXECUTEONLYONCE);
+    else if ( m_bForceRealTimer )
+    {
+        // so we don't block the nested message queue in move and resize
+        // with posted 0ms SAL_MSG_TIMER_CALLBACK messages
+        SetTimer( GetSalData()->mpInstance->mhComWnd, m_aWmTimerId,
+                  USER_TIMER_MINIMUM, nullptr );
+        m_bSetTimerRunning = true;
+    }
+    // we don't need any wakeup message, as this code can just run in the
+    // main thread!
+}
+
+WinSalTimer::WinSalTimer()
+    : m_nTimerId( nullptr )
+    , m_bDirectTimeout( false )
+    , m_bForceRealTimer( false )
+    , m_bSetTimerRunning( false )
+{
+}
+
+WinSalTimer::~WinSalTimer()
+{
+    Stop();
+}
+
+void WinSalTimer::Start( sal_uInt64 nMS )
+{
+    WinSalInstance *pInst = GetSalData()->mpInstance;
+    if ( pInst && !pInst->IsMainThread() )
+    {
+        bool const ret = PostMessageW(pInst->mhComWnd,
+            SAL_MSG_STARTTIMER, 0, static_cast<LPARAM>(tools::Time::GetSystemTicks()) + nMS);
+        SAL_WARN_IF(!ret, "vcl", "ERROR: PostMessage() failed!");
+    }
+    else
+        ImplStart( nMS );
+}
+
+void WinSalTimer::Stop()
+{
+    WinSalInstance *pInst = GetSalData()->mpInstance;
+    if ( pInst && !pInst->IsMainThread() )
+    {
+        bool const ret = PostMessageW(pInst->mhComWnd,
+            SAL_MSG_STOPTIMER, 0, 0);
+        SAL_WARN_IF(!ret, "vcl", "ERROR: PostMessage() failed!");
+    }
+    else
+        ImplStop();
+}
+
+/**
+ * This gets invoked from a Timer Queue thread.
+ * Don't acquire the SolarMutex to avoid deadlocks.
+ */
+void CALLBACK SalTimerProc(PVOID data, BOOLEAN)
+{
+    __try
+    {
+        WinSalTimer *pTimer = static_cast<WinSalTimer*>( data );
+        bool const ret = PostMessageW(
+            GetSalData()->mpInstance->mhComWnd, SAL_MSG_TIMER_CALLBACK,
+            static_cast<WPARAM>(pTimer->GetNextEventVersion()), 0 );
+#if OSL_DEBUG_LEVEL > 0
+        if (!ret) // SEH prevents using SAL_WARN here?
+            fputs("ERROR: PostMessage() failed!\n", stderr);
+#endif
+    }
+    __except(WinSalInstance::WorkaroundExceptionHandlingInUSER32Lib(GetExceptionCode(), GetExceptionInformation()))
+    {
+    }
+}
+
+void WinSalTimer::ImplHandleElapsedTimer()
+{
+    // Test for MouseLeave
+    SalTestMouseLeave();
+
+    m_bDirectTimeout = false;
+    ImplSalYieldMutexAcquireWithWait();
+    CallCallback();
+    ImplSalYieldMutexRelease();
+}
+
+void WinSalTimer::ImplHandleTimerEvent( const WPARAM aWPARAM )
+{
+    assert( aWPARAM <= SAL_MAX_INT32 );
+    if ( !IsValidEventVersion( static_cast<sal_Int32>( aWPARAM ) ) )
+        return;
+
+    ImplHandleElapsedTimer();
+}
+
+void WinSalTimer::SetForceRealTimer( const bool bVal )
+{
+    if ( m_bForceRealTimer == bVal )
+        return;
+
+    m_bForceRealTimer = bVal;
+
+    // we need a real timer, as m_bDirectTimeout won't be processed
+    if ( bVal && m_bDirectTimeout )
+        Start( 0 );
+}
+
+void WinSalTimer::ImplHandle_WM_TIMER( const WPARAM aWPARAM )
+{
+    assert( m_aWmTimerId == aWPARAM );
+    if ( !(m_aWmTimerId == aWPARAM && m_bSetTimerRunning) )
+        return;
+
+    m_bSetTimerRunning = false;
+    KillTimer( GetSalData()->mpInstance->mhComWnd, m_aWmTimerId );
+    ImplHandleElapsedTimer();
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */