71 lines
2.5 KiB
C++
71 lines
2.5 KiB
C++
/*
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* Copyright (C) 2017 Apple Inc. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
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* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "config.h"
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#include "HeapCellType.h"
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#include "JSCInlines.h"
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#include "MarkedBlockInlines.h"
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namespace JSC {
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// Writing it this way ensures that when you pass this as a functor, the callee is specialized for
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// this callback. If you wrote this as a normal function then the callee would be specialized for
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// the function's type and it would have indirect calls to that function. And unlike a lambda, it's
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// possible to mark this ALWAYS_INLINE.
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struct DefaultDestroyFunc {
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ALWAYS_INLINE void operator()(VM& vm, JSCell* cell) const
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{
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ASSERT(cell->structureID());
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Structure* structure = cell->structure(vm);
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ASSERT(structure->typeInfo().structureIsImmortal());
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const ClassInfo* classInfo = structure->classInfo();
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MethodTable::DestroyFunctionPtr destroy = classInfo->methodTable.destroy;
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destroy(cell);
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}
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};
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HeapCellType::HeapCellType(CellAttributes attributes)
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: m_attributes(attributes)
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{
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}
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HeapCellType::~HeapCellType()
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{
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}
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void HeapCellType::finishSweep(MarkedBlock::Handle& block, FreeList* freeList)
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{
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block.finishSweepKnowingHeapCellType(freeList, DefaultDestroyFunc());
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}
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void HeapCellType::destroy(VM& vm, JSCell* cell)
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{
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DefaultDestroyFunc()(vm, cell);
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}
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} // namespace JSC
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