JavaScriptCore-903.tar.gz

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

diff --git a/heap/MachineStackMarker.h b/heap/MachineStackMarker.h
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+/*
+ *  Copyright (C) 1999-2000 Harri Porten (porten@kde.org)
+ *  Copyright (C) 2001 Peter Kelly (pmk@post.com)
+ *  Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009 Apple Inc. All rights reserved.
+ *
+ *  This library is free software; you can redistribute it and/or
+ *  modify it under the terms of the GNU Lesser General Public
+ *  License as published by the Free Software Foundation; either
+ *  version 2 of the License, or (at your option) any later version.
+ *
+ *  This library 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 for more details.
+ *
+ *  You should have received a copy of the GNU Lesser General Public
+ *  License along with this library; if not, write to the Free Software
+ *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ *
+ */
+
+#ifndef MachineThreads_h
+#define MachineThreads_h
+
+#include <wtf/Noncopyable.h>
+#include <wtf/ThreadingPrimitives.h>
+
+#if ENABLE(JSC_MULTIPLE_THREADS)
+#include <pthread.h>
+#endif
+
+namespace JSC {
+
+    class Heap;
+    class ConservativeRoots;
+
+    class MachineThreads {
+        WTF_MAKE_NONCOPYABLE(MachineThreads);
+    public:
+        MachineThreads(Heap*);
+        ~MachineThreads();
+
+        void gatherConservativeRoots(ConservativeRoots&, void* stackCurrent);
+
+#if ENABLE(JSC_MULTIPLE_THREADS)
+        void makeUsableFromMultipleThreads();
+        void addCurrentThread(); // Only needs to be called by clients that can use the same heap from multiple threads.
+#endif
+
+    private:
+        void gatherFromCurrentThread(ConservativeRoots&, void* stackCurrent);
+
+#if ENABLE(JSC_MULTIPLE_THREADS)
+        class Thread;
+
+        static void removeThread(void*);
+        void removeCurrentThread();
+
+        void gatherFromOtherThread(ConservativeRoots&, Thread*);
+#endif
+
+        Heap* m_heap;
+
+#if ENABLE(JSC_MULTIPLE_THREADS)
+        Mutex m_registeredThreadsMutex;
+        Thread* m_registeredThreads;
+        pthread_key_t m_threadSpecific;
+#endif
+    };
+
+} // namespace JSC
+
+#endif // MachineThreads_h