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LibJS: Replace Cell live bit with a cell state

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So far we only have two states: Live and Dead. In the future, we can
add additional states to support incremental sweeping and/or multi-
stage cell destruction.
This commit is contained in:
Andreas Kling 2021-05-25 18:35:27 +02:00
parent 91656d63c7
commit 789d20ebb7
4 changed files with 32 additions and 20 deletions
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4
Userland/Libraries/LibJS/Heap/HeapBlock.cpp
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@ -47,11 +47,11 @@ void HeapBlock::deallocate(Cell* cell)
{
VERIFY(is_valid_cell_pointer(cell));
VERIFY(!m_freelist || is_valid_cell_pointer(m_freelist));
VERIFY(cell->is_live());
VERIFY(cell->state() == Cell::State::Live);
VERIFY(!cell->is_marked());
cell->~Cell();
auto* freelist_entry = new (cell) FreelistEntry();
freelist_entry->set_live(false);
freelist_entry->set_state(Cell::State::Dead);
freelist_entry->next = m_freelist;
m_freelist = freelist_entry;
}