| /* |
| * Copyright (C) 2011 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 CopiedSpace_h |
| #define CopiedSpace_h |
| |
| #include "CopiedAllocator.h" |
| #include "HeapBlock.h" |
| #include "TinyBloomFilter.h" |
| #include <wtf/Assertions.h> |
| #include <wtf/CheckedBoolean.h> |
| #include <wtf/DoublyLinkedList.h> |
| #include <wtf/HashSet.h> |
| #include <wtf/OSAllocator.h> |
| #include <wtf/PageAllocationAligned.h> |
| #include <wtf/PageBlock.h> |
| #include <wtf/StdLibExtras.h> |
| #include <wtf/TCSpinLock.h> |
| #include <wtf/ThreadingPrimitives.h> |
| |
| namespace JSC { |
| |
| class Heap; |
| class CopiedBlock; |
| |
| class CopiedSpace { |
| friend class CopyVisitor; |
| friend class GCThreadSharedData; |
| friend class SlotVisitor; |
| friend class JIT; |
| public: |
| CopiedSpace(Heap*); |
| ~CopiedSpace(); |
| void init(); |
| |
| CheckedBoolean tryAllocate(size_t, void**); |
| CheckedBoolean tryReallocate(void**, size_t, size_t); |
| |
| CopiedAllocator& allocator() { return m_allocator; } |
| |
| void startedCopying(); |
| void doneCopying(); |
| bool isInCopyPhase() { return m_inCopyingPhase; } |
| |
| void pin(CopiedBlock*); |
| bool isPinned(void*); |
| |
| bool contains(CopiedBlock*); |
| bool contains(void*, CopiedBlock*&); |
| |
| void pinIfNecessary(void* pointer); |
| |
| size_t size(); |
| size_t capacity(); |
| |
| bool isPagedOut(double deadline); |
| bool shouldDoCopyPhase() { return m_shouldDoCopyPhase; } |
| |
| void freeAllBlocks(); |
| |
| static CopiedBlock* blockFor(void*); |
| |
| private: |
| static bool isOversize(size_t); |
| static CopiedBlock* oversizeBlockFor(void* ptr); |
| |
| JS_EXPORT_PRIVATE CheckedBoolean tryAllocateSlowCase(size_t, void**); |
| CheckedBoolean tryAllocateOversize(size_t, void**); |
| CheckedBoolean tryReallocateOversize(void**, size_t, size_t); |
| |
| void allocateBlock(); |
| CopiedBlock* allocateBlockForCopyingPhase(); |
| |
| void doneFillingBlock(CopiedBlock*, CopiedBlock**); |
| void recycleEvacuatedBlock(CopiedBlock*); |
| void recycleBorrowedBlock(CopiedBlock*); |
| |
| Heap* m_heap; |
| |
| CopiedAllocator m_allocator; |
| |
| TinyBloomFilter m_blockFilter; |
| HashSet<CopiedBlock*> m_blockSet; |
| |
| SpinLock m_toSpaceLock; |
| |
| DoublyLinkedList<CopiedBlock>* m_toSpace; |
| DoublyLinkedList<CopiedBlock>* m_fromSpace; |
| |
| DoublyLinkedList<CopiedBlock> m_blocks1; |
| DoublyLinkedList<CopiedBlock> m_blocks2; |
| DoublyLinkedList<CopiedBlock> m_oversizeBlocks; |
| |
| bool m_inCopyingPhase; |
| bool m_shouldDoCopyPhase; |
| |
| Mutex m_loanedBlocksLock; |
| ThreadCondition m_loanedBlocksCondition; |
| size_t m_numberOfLoanedBlocks; |
| |
| static const size_t s_maxAllocationSize = CopiedBlock::blockSize / 2; |
| static const size_t s_initialBlockNum = 16; |
| static const size_t s_blockMask = ~(CopiedBlock::blockSize - 1); |
| }; |
| |
| } // namespace JSC |
| |
| #endif |