JavaScriptCore-1218.tar.gz

[apple/javascriptcore.git] / heap / IncrementalSweeper.h

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+/*
+ * Copyright (C) 2012 Apple 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 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 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 IncrementalSweeper_h
+#define IncrementalSweeper_h
+
+#include "HeapTimer.h"
+#include "MarkedBlock.h"
+#include <wtf/HashSet.h>
+#include <wtf/PassOwnPtr.h>
+#include <wtf/RetainPtr.h>
+#include <wtf/Vector.h>
+
+namespace JSC {
+
+class Heap;
+
+class IncrementalSweeper : public HeapTimer {
+public:
+    static PassOwnPtr<IncrementalSweeper> create(Heap*);
+    void startSweeping(Vector<MarkedBlock*>&);
+#if PLATFORM(IOS)
+    JS_EXPORT_PRIVATE virtual void doWork();
+#else
+    virtual void doWork();
+#endif
+    void sweepNextBlock();
+    void willFinishSweeping();
+
+#if USE(CF) || PLATFORM(BLACKBERRY) || PLATFORM(QT)
+#if USE(CF)
+protected:
+    JS_EXPORT_PRIVATE IncrementalSweeper(Heap*, CFRunLoopRef);
+#else
+private:
+    IncrementalSweeper(Heap*);
+#endif
+    
+private:
+    void doSweep(double startTime);
+    void scheduleTimer();
+    void cancelTimer();
+    
+    unsigned m_currentBlockToSweepIndex;
+    Vector<MarkedBlock*>& m_blocksToSweep;
+#else
+    
+private:
+    IncrementalSweeper(VM*);
+    
+#endif
+};
+
+} // namespace JSC
+
+#endif