109 lines
3.4 KiB
C
109 lines
3.4 KiB
C
/****************************************************************
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* *
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* Copyright 2001, 2013 Fidelity Information Services, Inc *
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* *
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* This source code contains the intellectual property *
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* of its copyright holder(s), and is made available *
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* under a license. If you do not know the terms of *
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* the license, please stop and do not read further. *
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* *
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****************************************************************/
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#include "mdef.h"
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#include "gtm_string.h"
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#include "cdb_sc.h"
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#include "gdsroot.h"
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#include "gdsblk.h"
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#include "gdsbml.h"
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#include "gtm_facility.h"
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#include "fileinfo.h"
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#include "gdsbt.h"
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#include "gdsfhead.h"
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#include "gdscc.h"
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#include "filestruct.h"
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#include "jnl.h"
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#include "gdsblkops.h" /* for CHECK_AND_RESET_UPDATE_ARRAY macro */
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/* Include prototypes */
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#include "t_qread.h"
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#include "t_end.h"
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#include "t_retry.h"
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#include "t_begin_crit.h"
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#include "t_write_map.h"
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#include "gvcst_map_build.h"
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#include "mm_read.h"
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GBLREF gd_region *gv_cur_region;
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GBLREF sgmnt_addrs *cs_addrs;
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GBLREF sgmnt_data_ptr_t cs_data;
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GBLREF char *update_array, *update_array_ptr;
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GBLREF cw_set_element cw_set[];
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GBLREF unsigned char rdfail_detail;
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GBLREF jnl_format_buffer *non_tp_jfb_ptr;
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void bm_setmap(block_id bml, block_id blk, int4 busy)
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{
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sm_uc_ptr_t bmp;
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trans_num ctn;
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srch_hist alt_hist;
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srch_blk_status blkhist; /* block-history to fill in for t_write_map which uses "blk_num", "buffaddr", "cr", "cycle" */
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cw_set_element *cse;
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int lbm_status; /* local bitmap status of input "blk" i.e. BUSY or FREE or RECYCLED */
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int4 reference_cnt;
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uint4 bitnum;
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error_def(ERR_DSEFAIL);
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t_begin_crit(ERR_DSEFAIL);
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ctn = cs_addrs->ti->curr_tn;
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if (!(bmp = t_qread(bml, &blkhist.cycle, &blkhist.cr)))
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t_retry((enum cdb_sc)rdfail_detail);
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blkhist.blk_num = bml;
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blkhist.buffaddr = bmp;
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alt_hist.h[0].blk_num = 0; /* Need for calls to T_END for bitmaps */
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CHECK_AND_RESET_UPDATE_ARRAY; /* reset update_array_ptr to update_array */
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bitnum = blk - bml;
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/* Find out current status in order to determine if there is going to be a state transition */
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assert(ROUND_DOWN2(blk, cs_data->bplmap) == bml);
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GET_BM_STATUS(bmp, bitnum, lbm_status);
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switch(lbm_status)
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{
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case BLK_BUSY:
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reference_cnt = busy ? 0 : -1;
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break;
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case BLK_FREE:
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case BLK_MAPINVALID:
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case BLK_RECYCLED:
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assert(BLK_MAPINVALID != lbm_status);
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reference_cnt = busy ? 1 : 0;
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break;
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default:
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assert(FALSE);
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break;
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}
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if (reference_cnt)
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{ /* Initialize update array with non-zero bitnum only if reference_cnt is non-zero. */
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assert(bitnum);
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*((block_id_ptr_t)update_array_ptr) = bitnum;
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update_array_ptr += SIZEOF(block_id);
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}
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/* Terminate update array unconditionally with zero bitnum. */
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*((block_id_ptr_t)update_array_ptr) = 0;
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update_array_ptr += SIZEOF(block_id);
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t_write_map(&blkhist, (uchar_ptr_t)update_array, ctn, reference_cnt);
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if (JNL_ENABLED(cs_data))
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{
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cse = (cw_set_element *)(&cw_set[0]);
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cse->new_buff = (unsigned char *)non_tp_jfb_ptr->buff;
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memcpy(cse->new_buff, bmp, ((blk_hdr_ptr_t)bmp)->bsiz);
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gvcst_map_build((uint4 *)cse->upd_addr, (uchar_ptr_t)cse->new_buff, cse, cs_addrs->ti->curr_tn);
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cse->done = TRUE;
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}
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/* Call t_end till it succeeds or aborts (error will be reported) */
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while ((trans_num)0 == t_end(&alt_hist, NULL, TN_NOT_SPECIFIED))
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;
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return;
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}
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