Method resize

src/jrd/cch.cpp:5305–5350

/// class BCBHashTable

void BCBHashTable::resize(ULONG count)
{
	const ULONG old_count = m_count;
	chain_type* const old_chains = m_chains;

	chain_type* new_chains = FB_NEW_POOL(m_pool) chain_type[count];
	m_count = count;
	m_chains = new_chains;

#ifndef HASH_USE_CDS_LIST
	// Initialize all new new_chains
	for (chain_type* que = new_chains; que < new_chains + count; que++)
		QUE_INIT(*que);
#endif

	if (!old_chains)
		return;

	const chain_type* const old_end = old_chains + old_count;

	// Move any active buffers from old hash table to new
	for (chain_type* old_tail = old_chains; old_tail < old_end; old_tail++)
	{
#ifndef HASH_USE_CDS_LIST
		while (QUE_NOT_EMPTY(*old_tail))
		{
			QUE que_inst = old_tail->que_forward;
			BufferDesc* bdb = BLOCK(que_inst, BufferDesc, bdb_que);
			QUE_DELETE(*que_inst);
			QUE mod_que = &new_chains[hash(bdb->bdb_page)];
			QUE_INSERT(*mod_que, *que_inst);
		}
#else
		while (!old_tail->empty())
		{
			auto n = old_tail->begin();
			old_tail->erase(n->first);				// bdb_page

			chain_type* new_chain = &m_chains[hash(n->first)];
			new_chain->insert(n->first, n->second);	// bdb_page, bdb
		}
#endif
	}

	delete[] old_chains;
}

void BCBHashTable::clear()
{