fis-gtm/sr_port/gvcst_map_build.c

/****************************************************************
 *								*
 *	Copyright 2001, 2012 Fidelity Information Services, Inc	*
 *								*
 *	This source code contains the intellectual property	*
 *	of its copyright holder(s), and is made available	*
 *	under a license.  If you do not know the terms of	*
 *	the license, please stop and do not read further.	*
 *								*
 ****************************************************************/

#include "mdef.h"

#include "gdsroot.h"
#include "gtm_facility.h"
#include "fileinfo.h"
#include "gdsbt.h"
#include "gdsblk.h"
#include "gdsfhead.h"
#include "gdscc.h"
#include "gdsbml.h"

#include "send_msg.h"		/* prototypes */
#include "gvcst_map_build.h"
#include "min_max.h"

GBLREF	gd_region	*gv_cur_region;
GBLREF	sgmnt_addrs	*cs_addrs;
GBLREF	boolean_t	dse_running;
GBLREF	boolean_t	mu_reorg_upgrd_dwngrd_in_prog;

void gvcst_map_build(uint4 *array, sm_uc_ptr_t base_addr, cw_set_element *cs, trans_num ctn)
{
	boolean_t	status;
	uint4		(*bml_func)();
	uint4		bitnum, ret;
#ifdef DEBUG
	int4		prev_bitnum, actual_cnt = 0;
#endif

	DEBUG_ONLY(VALIDATE_BM_BLK(cs->blk, (blk_hdr_ptr_t)base_addr, cs_addrs, gv_cur_region, status);)
	assert(status); /* assert it is a valid bitmap block */
	((blk_hdr_ptr_t)base_addr)->tn = ctn;
	base_addr += SIZEOF(blk_hdr);
	assert(cs_addrs->now_crit); /* Don't want to be messing with highest_lbm_with_busy_blk outside crit */
	if (cs_addrs->nl->trunc_pid)
	{ /* A truncate is in progress. We need to 1) update cnl->highest_lbm_with_busy_blk if needed and 2) select bml_free if this is a
	   * t_recycled2free transaction. */
		if (cs->reference_cnt > 0)
		{
			bml_func = bml_busy;
			cs_addrs->nl->highest_lbm_with_busy_blk = MAX(cs->blk, cs_addrs->nl->highest_lbm_with_busy_blk);
		} else if (cs->reference_cnt < 0)
		{
			if (cs_addrs->hdr->db_got_to_v5_once)
				bml_func = bml_recycled;
			else
				bml_func = bml_free;
		} else	/* cs->reference_cnt == 0 */
		{
			if (cs_addrs->hdr->db_got_to_v5_once && mu_reorg_upgrd_dwngrd_in_prog)
				bml_func = bml_recycled;
			else
				bml_func = bml_free;
		}
	} else /* Choose bml_func as it was chosen before truncate feature. */
		bml_func = (cs->reference_cnt > 0) ? bml_busy : (cs_addrs->hdr->db_got_to_v5_once ? bml_recycled : bml_free);
	DEBUG_ONLY(prev_bitnum = -1;)
	while (bitnum = *array)		/* caution : intended assignment */
	{
		assert((uint4)bitnum < cs_addrs->hdr->bplmap);	/* check that bitnum is positive and within 0 to bplmap */
		assert((int4)bitnum > prev_bitnum);	/* assert that blocks are sorted in the update array */
		ret = (* bml_func)(bitnum, base_addr);
		DEBUG_ONLY(
			if (cs->reference_cnt > 0)
				actual_cnt++;	/* block is being marked busy */
			else if (!ret)
				actual_cnt--;	/* block is transitioning from BUSY to either RECYCLED or FREE */
			/* all other state changes do not involve updates to the free_blocks count */
		)
		array++;
		DEBUG_ONLY(prev_bitnum = (int4)bitnum);
	}
	assert(actual_cnt == cs->reference_cnt);
}