heap/MachineStackMarker.h

   1 /*
   2  *  Copyright (C) 1999-2000 Harri Porten (porten@kde.org)
   3  *  Copyright (C) 2001 Peter Kelly (pmk@post.com)
   4  *  Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009 Apple Inc. All rights reserved.
   5  *
   6  *  This library is free software; you can redistribute it and/or
   7  *  modify it under the terms of the GNU Lesser General Public
   8  *  License as published by the Free Software Foundation; either
   9  *  version 2 of the License, or (at your option) any later version.
  10  *
  11  *  This library is distributed in the hope that it will be useful,
  12  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  *  Lesser General Public License for more details.
  15  *
  16  *  You should have received a copy of the GNU Lesser General Public
  17  *  License along with this library; if not, write to the Free Software
  18  *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
  19  *
  20  */
  21
  22 #ifndef MachineThreads_h
  23 #define MachineThreads_h
  24
  25 #include <wtf/Noncopyable.h>
  26 #include <wtf/ThreadSpecific.h>
  27 #include <wtf/ThreadingPrimitives.h>
  28
  29 namespace JSC {
  30
  31     class CodeBlockSet;
  32     class ConservativeRoots;
  33     class Heap;
  34     class JITStubRoutineSet;
  35
  36     class MachineThreads {
  37         WTF_MAKE_NONCOPYABLE(MachineThreads);
  38     public:
  39         MachineThreads(Heap*);
  40         ~MachineThreads();
  41
  42         void gatherConservativeRoots(ConservativeRoots&, JITStubRoutineSet&, CodeBlockSet&, void* stackCurrent);
  43
  44         JS_EXPORT_PRIVATE void makeUsableFromMultipleThreads();
  45         JS_EXPORT_PRIVATE void addCurrentThread(); // Only needs to be called by clients that can use the same heap from multiple threads.
  46
  47     private:
  48         void gatherFromCurrentThread(ConservativeRoots&, JITStubRoutineSet&, CodeBlockSet&, void* stackCurrent);
  49
  50         class Thread;
  51
  52         static void removeThread(void*);
  53         void removeCurrentThread();
  54
  55         void gatherFromOtherThread(ConservativeRoots&, Thread*, JITStubRoutineSet&, CodeBlockSet&);
  56
  57         Mutex m_registeredThreadsMutex;
  58         Thread* m_registeredThreads;
  59         WTF::ThreadSpecificKey m_threadSpecific;
  60 #if !ASSERT_DISABLED
  61         Heap* m_heap;
  62 #endif
  63     };
  64
  65 } // namespace JSC
  66
  67 #endif // MachineThreads_h