1 files changed, 485 insertions, 0 deletions
diff --git a/salhelper/source/timer.cxx b/salhelper/source/timer.cxx
new file mode 100644
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+++ b/salhelper/source/timer.cxx
@@ -0,0 +1,485 @@
+/*************************************************************************
+ *
+ * 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.
+ *
+ ************************************************************************/
+#include <salhelper/timer.hxx>
+
+#include <osl/diagnose.h>
+#include <salhelper/simplereferenceobject.hxx>
+#include <osl/thread.hxx>
+#include <osl/conditn.hxx>
+#include <osl/mutex.hxx>
+
+using namespace salhelper;
+
+class salhelper::TimerManager : public osl::Thread
+{
+
+public:
+
+    ///
+    TimerManager();
+
+    ///
+    ~TimerManager();
+
+    /// register timer
+    sal_Bool SAL_CALL registerTimer(salhelper::Timer* pTimer);
+
+    /// unregister timer
+    sal_Bool SAL_CALL unregisterTimer(salhelper::Timer* pTimer);
+
+    /// lookup timer
+    sal_Bool SAL_CALL lookupTimer(const salhelper::Timer* pTimer);
+
+    /// retrieves the "Singleton" TimerManager Instance
+    static TimerManager* SAL_CALL getTimerManager();
+
+
+protected:
+
+    /// worker-function of thread
+    virtual void SAL_CALL run();
+
+    // Checking and triggering of a timer event
+    void SAL_CALL checkForTimeout();
+
+    // cleanup Method
+    virtual void SAL_CALL onTerminated();
+
+    // sorted-queue data
+    salhelper::Timer*       m_pHead;
+    // List Protection
+    osl::Mutex                  m_Lock;
+    // Signal the insertion of a timer
+    osl::Condition              m_notEmpty;
+
+    // Synchronize access to TimerManager
+    static osl::Mutex           m_Access;
+
+    // "Singleton Pattern"
+    static salhelper::TimerManager* m_pManager;
+
+    friend class TimerManagerCleanup;
+
+};
+
+using namespace salhelper;
+
+/////////////////////////////////////////////////////////////////////////////
+//
+// Timer class
+//
+
+Timer::Timer()
+    : m_aTimeOut( 0 ),
+      m_aExpired( 0 ),
+      m_aRepeatDelta( 0 ),
+      m_pNext( NULL )
+{
+}
+
+Timer::Timer( const TTimeValue& Time )
+    : m_aTimeOut( Time ),
+      m_aExpired( 0 ),
+      m_aRepeatDelta( 0 ),
+      m_pNext( NULL )
+{
+}
+
+Timer::Timer( const TTimeValue& Time, const TTimeValue& Repeat )
+    : m_aTimeOut( Time ),
+      m_aExpired( 0 ),
+      m_aRepeatDelta( Repeat ),
+      m_pNext( NULL )
+{
+}
+
+Timer::~Timer()
+{
+    stop();
+}
+
+void Timer::start()
+{
+    if (! isTicking())
+    {
+        if (! m_aTimeOut.isEmpty())
+            setRemainingTime(m_aTimeOut);
+
+        TimerManager *pManager = TimerManager::getTimerManager();
+
+        OSL_ASSERT(pManager);
+
+        if ( pManager != 0 )
+        {
+            pManager->registerTimer(this);
+        }
+    }
+}
+
+void Timer::stop()
+{
+    TimerManager *pManager = TimerManager::getTimerManager();
+
+    OSL_ASSERT(pManager);
+
+    if ( pManager != 0 )
+    {
+        pManager->unregisterTimer(this);
+    }
+}
+
+sal_Bool Timer::isTicking() const
+{
+    TimerManager *pManager = TimerManager::getTimerManager();
+
+    OSL_ASSERT(pManager);
+
+    if (pManager)
+        return pManager->lookupTimer(this);
+    else
+        return sal_False;
+
+}
+
+sal_Bool Timer::isExpired() const
+{
+    TTimeValue Now;
+
+    osl_getSystemTime(&Now);
+
+    return !(Now < m_aExpired);
+}
+
+sal_Bool Timer::expiresBefore(const Timer* pTimer) const
+{
+    OSL_ASSERT(pTimer);
+
+    if ( pTimer != 0 )
+    {
+        return m_aExpired < pTimer->m_aExpired;
+    }
+    else
+    {
+        return sal_False;
+    }
+}
+
+void Timer::setAbsoluteTime(const TTimeValue& Time)
+{
+    m_aTimeOut     = 0;
+    m_aExpired     = Time;
+    m_aRepeatDelta = 0;
+
+    m_aExpired.normalize();
+}
+
+void Timer::setRemainingTime(const TTimeValue& Remaining)
+{
+    osl_getSystemTime(&m_aExpired);
+
+    m_aExpired.addTime(Remaining);
+}
+
+void Timer::setRemainingTime(const TTimeValue& Remaining, const TTimeValue& Repeat)
+{
+    osl_getSystemTime(&m_aExpired);
+
+    m_aExpired.addTime(Remaining);
+
+    m_aRepeatDelta = Repeat;
+}
+
+void Timer::addTime(const TTimeValue& Delta)
+{
+    m_aExpired.addTime(Delta);
+}
+
+TTimeValue Timer::getRemainingTime() const
+{
+    TTimeValue Now;
+
+    osl_getSystemTime(&Now);
+
+    sal_Int32 secs = m_aExpired.Seconds - Now.Seconds;
+
+    if (secs < 0)
+        return TTimeValue(0, 0);
+
+    sal_Int32 nsecs = m_aExpired.Nanosec - Now.Nanosec;
+
+    if (nsecs < 0)
+    {
+        if (secs > 0)
+        {
+            secs  -= 1;
+            nsecs += 1000000000L;
+        }
+        else
+            return TTimeValue(0, 0);
+    }
+
+    return TTimeValue(secs, nsecs);
+}
+
+
+/////////////////////////////////////////////////////////////////////////////
+//
+// Timer manager
+//
+
+osl::Mutex salhelper::TimerManager::m_Access;
+TimerManager* salhelper::TimerManager::m_pManager = NULL;
+
+TimerManager::TimerManager()
+{
+    osl::MutexGuard Guard(&m_Access);
+
+    OSL_ASSERT(m_pManager == 0);
+
+    m_pManager = this;
+
+    m_pHead= 0;
+
+    m_notEmpty.reset();
+
+    // start thread
+    create();
+}
+
+TimerManager::~TimerManager()
+{
+    osl::MutexGuard Guard(&m_Access);
+
+    if ( m_pManager == this )
+        m_pManager = 0;
+}
+
+void TimerManager::onTerminated()
+{
+    delete this; // mfe: AAARRRGGGHHH!!!
+}
+
+TimerManager* TimerManager::getTimerManager()
+{
+    osl::MutexGuard Guard(&m_Access);
+
+    if (! m_pManager)
+        new TimerManager;
+
+    return (m_pManager);
+}
+
+sal_Bool TimerManager::registerTimer(Timer* pTimer)
+{
+    OSL_ASSERT(pTimer);
+
+    if ( pTimer == 0 )
+    {
+        return sal_False;
+    }
+
+    osl::MutexGuard Guard(&m_Lock);
+
+    // try to find one with equal or lower remaining time.
+    Timer** ppIter = &m_pHead;
+
+    while (*ppIter)
+    {
+        if (pTimer->expiresBefore(*ppIter))
+        {
+            // next element has higher remaining time,
+            // => insert new timer before
+            break;
+        }
+        ppIter= &((*ppIter)->m_pNext);
+    }
+
+    // next element has higher remaining time,
+    // => insert new timer before
+    pTimer->m_pNext= *ppIter;
+    *ppIter = pTimer;
+
+
+    if (pTimer == m_pHead)
+    {
+        // it was inserted as new head
+        // signal it to TimerManager Thread
+        m_notEmpty.set();
+    }
+
+    return sal_True;
+}
+
+sal_Bool TimerManager::unregisterTimer(Timer* pTimer)
+{
+    OSL_ASSERT(pTimer);
+
+    if ( pTimer == 0 )
+    {
+        return sal_False;
+    }
+
+    // lock access
+    osl::MutexGuard Guard(&m_Lock);
+
+    Timer** ppIter = &m_pHead;
+
+    while (*ppIter)
+    {
+        if (pTimer == (*ppIter))
+        {
+            // remove timer from list
+            *ppIter = (*ppIter)->m_pNext;
+            return sal_True;
+        }
+        ppIter= &((*ppIter)->m_pNext);
+    }
+
+    return sal_False;
+}
+
+sal_Bool TimerManager::lookupTimer(const Timer* pTimer)
+{
+    OSL_ASSERT(pTimer);
+
+    if ( pTimer == 0 )
+    {
+        return sal_False;
+    }
+
+    // lock access
+    osl::MutexGuard Guard(&m_Lock);
+
+    // check the list
+    for (Timer* pIter = m_pHead; pIter != 0; pIter= pIter->m_pNext)
+    {
+        if (pIter == pTimer)
+        {
+            return sal_True;
+        }
+    }
+
+    return sal_False;
+}
+
+void TimerManager::checkForTimeout()
+{
+
+    m_Lock.acquire();
+
+    if ( m_pHead == 0 )
+    {
+        m_Lock.release();
+        return;
+    }
+
+    Timer* pTimer = m_pHead;
+
+    if (pTimer->isExpired())
+    {
+        // remove expired timer
+        m_pHead = pTimer->m_pNext;
+
+        pTimer->acquire();
+
+        m_Lock.release();
+
+        pTimer->onShot();
+
+        // restart timer if specified
+        if ( ! pTimer->m_aRepeatDelta.isEmpty() )
+        {
+            TTimeValue Now;
+
+            osl_getSystemTime(&Now);
+
+            Now.Seconds += pTimer->m_aRepeatDelta.Seconds;
+            Now.Nanosec += pTimer->m_aRepeatDelta.Nanosec;
+
+            pTimer->m_aExpired = Now;
+
+            registerTimer(pTimer);
+        }
+        pTimer->release();
+    }
+    else
+    {
+        m_Lock.release();
+    }
+
+
+    return;
+}
+
+void TimerManager::run()
+{
+    setPriority( osl_Thread_PriorityBelowNormal );
+
+    while (schedule())
+    {
+        TTimeValue      delay;
+        TTimeValue*     pDelay=0;
+
+
+        m_Lock.acquire();
+
+        if (m_pHead != 0)
+        {
+            delay = m_pHead->getRemainingTime();
+            pDelay=&delay;
+        }
+        else
+        {
+            pDelay=0;
+        }
+
+
+        m_notEmpty.reset();
+
+        m_Lock.release();
+
+
+        m_notEmpty.wait(pDelay);
+
+        checkForTimeout();
+    }
+
+}
+
+
+/////////////////////////////////////////////////////////////////////////////
+//
+// Timer manager cleanup
+//
+
+// jbu:
+// The timer manager cleanup has been removed (no thread is killed anymore).
+// So the thread leaks.
+// This will result in a GPF in case the salhelper-library gets unloaded before
+// process termination.
+// -> TODO : rewrite this file, so that the timerManager thread gets destroyed,
+//           when there are no timers anymore !