1 files changed, 112 insertions, 0 deletions
diff --git a/WebCore/platform/Timer.h b/WebCore/platform/Timer.h
new file mode 100644
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--- /dev/null
+++ b/WebCore/platform/Timer.h
@@ -0,0 +1,112 @@
+/*
+ * Copyright (C) 2006 Apple Computer, Inc.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
+ * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 
+ */
+
+#ifndef Timer_h
+#define Timer_h
+
+#include <wtf/Noncopyable.h>
+#include <wtf/Vector.h>
+
+namespace WebCore {
+
+// Time intervals are all in seconds.
+
+class TimerHeapElement;
+
+class TimerBase : Noncopyable {
+public:
+    TimerBase();
+    virtual ~TimerBase();
+
+    void start(double nextFireInterval, double repeatInterval);
+
+    void startRepeating(double repeatInterval) { start(repeatInterval, repeatInterval); }
+    void startOneShot(double interval) { start(interval, 0); }
+
+    void stop();
+    bool isActive() const;
+
+    double nextFireInterval() const;
+    double repeatInterval() const { return m_repeatInterval; }
+
+    void augmentRepeatInterval(double delta) { setNextFireTime(m_nextFireTime + delta); m_repeatInterval += delta; }
+
+    static void fireTimersInNestedEventLoop();
+
+private:
+    virtual void fired() = 0;
+
+    void checkConsistency() const;
+    void checkHeapIndex() const;
+
+    void setNextFireTime(double);
+
+    bool inHeap() const { return m_heapIndex != -1; }
+
+    void heapDecreaseKey();
+    void heapDelete();
+    void heapDeleteMin();
+    void heapIncreaseKey();
+    void heapInsert();
+    void heapPop();
+    void heapPopMin();
+
+    static void collectFiringTimers(double fireTime, Vector<TimerBase*>&);
+    static void fireTimers(double fireTime, const Vector<TimerBase*>&);
+    static void sharedTimerFired();
+
+    double m_nextFireTime; // 0 if inactive
+    double m_repeatInterval; // 0 if not repeating
+    int m_heapIndex; // -1 if not in heap
+    unsigned m_heapInsertionOrder; // Used to keep order among equal-fire-time timers
+
+    friend void updateSharedTimer();
+    friend void setDeferringTimers(bool);
+    friend class TimerHeapElement;
+    friend bool operator<(const TimerHeapElement&, const TimerHeapElement&);
+};
+
+template <typename TimerFiredClass> class Timer : public TimerBase {
+public:
+    typedef void (TimerFiredClass::*TimerFiredFunction)(Timer*);
+
+    Timer(TimerFiredClass* o, TimerFiredFunction f)
+        : m_object(o), m_function(f) { }
+
+private:
+    virtual void fired() { (m_object->*m_function)(this); }
+
+    TimerFiredClass* m_object;
+    TimerFiredFunction m_function;
+};
+
+// Set to true to prevent any timers from firing.
+// When set back to false, timers that were deferred will fire.
+bool isDeferringTimers();
+void setDeferringTimers(bool);
+
+}
+
+#endif