Function CCH_get_related

src/jrd/cch.cpp:1394–1430

void CCH_get_related(thread_db* tdbb, PageNumber page, PagesArray &lowPages)
{
/**************************************
 *
 *	C C H _ g e t _ r e l a t e d
 *
 **************************************
 *
 * Functional description
 *	Collect all pages, dependent on given page (i.e. all pages which must be
 *  written after given page). To do it, walk low part of precedence graph
 *  starting from given page and put its numbers into array.
 *
 **************************************/

	Database* dbb = tdbb->getDatabase();
	BufferControl* bcb = dbb->dbb_bcb;

#ifndef HASH_USE_CDS_LIST
	Sync bcbSync(&bcb->bcb_syncObject, "CCH_get_related");
	bcbSync.lock(SYNC_SHARED);
#endif

	BufferDesc* bdb = bcb->bcb_hashTable->find(page);
#ifndef HASH_USE_CDS_LIST
	bcbSync.unlock();
#endif

	if (bdb)
	{
		Sync precSync(&bcb->bcb_syncPrecedence, "CCH_get_related");
		precSync.lock(SYNC_EXCLUSIVE);

		const ULONG mark = get_prec_walk_mark(bcb);
		get_related(bdb, lowPages, PRE_SEARCH_LIMIT, mark);
	}
}


pag* CCH_handoff(thread_db*	tdbb, WIN* window, ULONG page, int lock, SCHAR page_type,