void WeakSet::sweep()
{
WeakBlock* next;
for (WeakBlock* block = m_blocks.head(); block; block = next) {
next = block->next();
// If a block is completely empty, a new sweep won't have any effect.
if (block->isEmpty())
continue;
block->takeSweepResult(); // Force a new sweep by discarding the last sweep.
block->sweep();
}
}
void WeakSet::shrink()
{
WeakBlock* next;
for (WeakBlock* block = m_blocks.head(); block; block = next) {
next = block->next();
if (block->isEmpty())
removeAllocator(block);
}
resetAllocator();
if (m_blocks.isEmpty() && isOnList())
remove();
}
bool Heap::sweepNextLogicallyEmptyWeakBlock()
{
if (m_indexOfNextLogicallyEmptyWeakBlockToSweep == WTF::notFound)
return false;
WeakBlock* block = m_logicallyEmptyWeakBlocks[m_indexOfNextLogicallyEmptyWeakBlockToSweep];
block->sweep();
if (block->isEmpty()) {
std::swap(m_logicallyEmptyWeakBlocks[m_indexOfNextLogicallyEmptyWeakBlockToSweep], m_logicallyEmptyWeakBlocks.last());
m_logicallyEmptyWeakBlocks.removeLast();
WeakBlock::destroy(block);
} else
m_indexOfNextLogicallyEmptyWeakBlockToSweep++;
if (m_indexOfNextLogicallyEmptyWeakBlockToSweep >= m_logicallyEmptyWeakBlocks.size()) {
m_indexOfNextLogicallyEmptyWeakBlockToSweep = WTF::notFound;
return false;
}
return true;
}
