Function INF_database_info

src/jrd/inf.cpp:272–976

void INF_database_info(thread_db* tdbb,
					   const ULONG item_length,
					   const UCHAR* items,
					   const ULONG output_length,
					   UCHAR* info)
{
/**************************************
 *
 *	I N F _ d a t a b a s e _ i n f o	( J R D )
 *
 **************************************
 *
 * Functional description
 *	Process requests for database info.
 *
 **************************************/
 	CHECK_INPUT("INF_database_info");

	CountsBuffer counts_buffer;
	UCHAR* buffer = counts_buffer.getBuffer(BUFFER_SMALL, false);
	ULONG length, err_val;
	bool header_refreshed = false;

	Database* const dbb = tdbb->getDatabase();
	CHECK_DBB(dbb);

	AutoTransaction transaction(tdbb);

	const UCHAR* const end_items = items + item_length;
	const UCHAR* const end = info + output_length;

	const Jrd::Attachment* const att = tdbb->getAttachment();

	while (items < end_items && *items != isc_info_end && info < end)
	{
		UCHAR* p = buffer;
		UCHAR item = *items++;

		switch (item)
		{
		case isc_info_end:
			break;

		case isc_info_reads:
			length = INF_convert(dbb->dbb_stats.getValue(RuntimeStatistics::PAGE_READS), buffer);
			break;

		case isc_info_writes:
			length = INF_convert(dbb->dbb_stats.getValue(RuntimeStatistics::PAGE_WRITES), buffer);
			break;

		case isc_info_fetches:
			length = INF_convert(dbb->dbb_stats.getValue(RuntimeStatistics::PAGE_FETCHES), buffer);
			break;

		case isc_info_marks:
			length = INF_convert(dbb->dbb_stats.getValue(RuntimeStatistics::PAGE_MARKS), buffer);
			break;