WebKit/Source/JavaScriptCore/heap/HeapCellType.cpp at main · WebKit/WebKit · GitHub

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#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&, JSCell* cell) const

{

ASSERT(cell->structureID());

Structure* structure = cell->structure();

ASSERT(structure->typeInfo().structureIsImmortal());

const ClassInfo* classInfo = structure->classInfoForCells();

MethodTable::DestroyFunctionPtr destroy = classInfo->methodTable.destroy;

destroy(cell);

}

};

HeapCellType::HeapCellType(CellAttributes attributes)

: m_attributes(attributes)

{

}

HeapCellType::~HeapCellType() = default;

void HeapCellType::finishSweep(MarkedBlock::Handle& block, FreeList* freeList) const

{

block.finishSweepKnowingHeapCellType(freeList, DefaultDestroyFunc());

}

void HeapCellType::destroy(VM& vm, JSCell* cell) const

{

DefaultDestroyFunc()(vm, cell);

}

} // namespace JSC

WebKit/Source/JavaScriptCore/heap/HeapCellType.cpp at main · WebKit/WebKit · GitHub

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