Source/JavaScriptCore/heap/IsoSubspaceInlines.h

/*
 * Copyright (C) 2018-2021 Apple Inc. All rights reserved.
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#pragma once

namespace JSC {

ALWAYS_INLINE void* IsoSubspace::allocate(VM& vm, size_t size, GCDeferralContext* deferralContext, AllocationFailureMode failureMode)
{
    RELEASE_ASSERT(WTF::roundUpToMultipleOf<MarkedBlock::atomSize>(size) == cellSize());
    Allocator allocator = allocatorFor(size, AllocatorForMode::MustAlreadyHaveAllocator);
    void* result = allocator.allocate(vm.heap, deferralContext, failureMode);
    return result;
}

inline void IsoSubspace::clearIsoCellSetBit(PreciseAllocation* preciseAllocation)
{
    unsigned lowerTierIndex = preciseAllocation->lowerTierIndex();
    m_cellSets.forEach(
        [&](IsoCellSet* set) {
            set->clearLowerTierCell(lowerTierIndex);
        });
}

inline void IsoSubspace::sweep()
{
    Subspace::sweepBlocks();
    // We sweep precise-allocations eagerly, but we do not free it immediately.
    // This part should be done by MarkedSpace::sweepPreciseAllocations.
    m_preciseAllocations.forEach([&](PreciseAllocation* allocation) {
        allocation->sweep();
    });
}

template<typename Func>
void IsoSubspace::forEachLowerTierFreeListedPreciseAllocation(const Func& func)
{
    m_lowerTierFreeList.forEach(func);
}

} // namespace JSC