69 lines
2.3 KiB
C
69 lines
2.3 KiB
C
/****************************************************************
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* *
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* Copyright 2007, 2012 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 "gdsroot.h"
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#include "gdskill.h"
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#include "gdsblk.h"
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#include "gdsbt.h"
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#include "gtm_facility.h"
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#include "fileinfo.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 "t_busy2free.h"
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#include "min_max.h"
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#include "jnl_get_checksum.h"
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GBLREF cw_set_element cw_set[];
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GBLREF unsigned char cw_set_depth;
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GBLREF uint4 dollar_tlevel;
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GBLREF sgmnt_addrs *cs_addrs;
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void t_busy2free(srch_blk_status *blkhist)
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{
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cw_set_element *cse;
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sgmnt_addrs *csa;
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blk_hdr_ptr_t old_block;
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unsigned int bsiz;
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jnl_buffer_ptr_t jbbp; /* jbbp is non-NULL only if before-image journaling */
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assert(!dollar_tlevel);
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assert(cw_set_depth < CDB_CW_SET_SIZE);
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cse = &cw_set[cw_set_depth];
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cse->mode = gds_t_busy2free;
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cse->blk = blkhist->blk_num;
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cse->old_block = blkhist->buffaddr;
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old_block = (blk_hdr_ptr_t)cse->old_block;
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/* t_busy2free operates on BUSY blocks and hence cse->blk_prior_state's free and recycled status is always set to FALSE */
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BIT_CLEAR_FREE(cse->blk_prior_state);
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BIT_CLEAR_RECYCLED(cse->blk_prior_state);
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cse->blk_checksum = 0;
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csa = cs_addrs;
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assert(dba_bg == csa->hdr->acc_meth);
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assert(NULL != old_block);
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jbbp = (JNL_ENABLED(csa) && csa->jnl_before_image) ? csa->jnl->jnl_buff : NULL;
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if ((NULL != jbbp) && (old_block->tn < jbbp->epoch_tn))
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{ /* Pre-compute CHECKSUM. Since we dont necessarily hold crit at this point, ensure we never try to
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* access the buffer more than the db blk_size.
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*/
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bsiz = MIN(old_block->bsiz, csa->hdr->blk_size);
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cse->blk_checksum = jnl_get_checksum((uint4*)old_block, csa, bsiz);
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}
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cse->upd_addr = NULL;
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cse->jnl_freeaddr = 0; /* reset jnl_freeaddr that previous transaction might have filled in */
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cse->done = FALSE;
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blkhist->cse = cse; /* indicate to t_end/tp_tend that this block is part of the write-set */
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cw_set_depth++;
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}
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