/* * Copyright (C) 2017 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. */ #include "config.h" #include "HeapCellType.h" #include "JSCInlines.h" #include "MarkedBlockInlines.h" namespace JSC { // Writing it this way ensures that when you pass this as a functor, the callee is specialized for // this callback. If you wrote this as a normal function then the callee would be specialized for // the function's type and it would have indirect calls to that function. And unlike a lambda, it's // possible to mark this ALWAYS_INLINE. struct DefaultDestroyFunc { ALWAYS_INLINE void operator()(VM& vm, JSCell* cell) const { ASSERT(cell->structureID()); Structure* structure = cell->structure(vm); ASSERT(structure->typeInfo().structureIsImmortal()); const ClassInfo* classInfo = structure->classInfo(); MethodTable::DestroyFunctionPtr destroy = classInfo->methodTable.destroy; destroy(cell); } }; HeapCellType::HeapCellType(CellAttributes attributes) : m_attributes(attributes) { } HeapCellType::~HeapCellType() { } void HeapCellType::finishSweep(MarkedBlock::Handle& block, FreeList* freeList) { block.finishSweepKnowingHeapCellType(freeList, DefaultDestroyFunc()); } void HeapCellType::destroy(VM& vm, JSCell* cell) { DefaultDestroyFunc()(vm, cell); } } // namespace JSC