Function PAG_format_pip

src/jrd/pag.cpp:978–1031

void PAG_format_pip(thread_db* tdbb, PageSpace& pageSpace)
{
/**************************************
 *
 *	 P A G _ f o r m a t _ p i p
 *
 **************************************
 *
 * Functional description
 *	Create a page inventory page to
 *	complete the formatting of a new file
 *	into a rudimentary database.
 *
 **************************************/
	SET_TDBB(tdbb);
	Database* dbb = tdbb->getDatabase();
	CHECK_DBB(dbb);

	// Initialize first SCN's Page
	pageSpace.scnFirst = 0;
	if (!pageSpace.isTemporary())
	{
		pageSpace.scnFirst = FIRST_SCN_PAGE;

		WIN window(pageSpace.pageSpaceID, pageSpace.scnFirst);
		scns_page* page = (scns_page*) CCH_fake(tdbb, &window, 1);

		page->scn_header.pag_type = pag_scns;
		page->scn_sequence = 0;

		CCH_RELEASE(tdbb, &window);
	}

	// Initialize Page Inventory Page
	{
		pageSpace.pipFirst = FIRST_PIP_PAGE;

		WIN window(pageSpace.pageSpaceID, pageSpace.pipFirst);
		page_inv_page* pages = (page_inv_page*) CCH_fake(tdbb, &window, 1);

		pages->pip_header.pag_type = pag_pages;
		pages->pip_used = (pageSpace.scnFirst ? pageSpace.scnFirst : pageSpace.pipFirst) + 1;
		pages->pip_min = pages->pip_used;
		int count = dbb->dbb_page_size - static_cast<int>(offsetof(page_inv_page, pip_bits[0]));

		memset(pages->pip_bits, 0xFF, count);

		pages->pip_bits[0] &= ~(1 | 2);
		if (pageSpace.scnFirst)
			pages->pip_bits[0] &= ~(1 << pageSpace.scnFirst);

		CCH_RELEASE(tdbb, &window);
	}
}


bool PAG_get_clump(thread_db* tdbb, USHORT type, USHORT* inout_len, UCHAR* entry)