137 lines
3.6 KiB
C
137 lines
3.6 KiB
C
/****************************************************************
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* *
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* Copyright 2001, 2011 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 "gdsblk.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 "cdb_sc.h"
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#include "filestruct.h" /* needed for jnl.h */
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#include "gdscc.h" /* needed for tp.h */
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#include "jnl.h" /* needed for tp.h */
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#include "gdskill.h" /* needed for tp.h */
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#include "buddy_list.h" /* needed for tp.h */
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#include "hashtab_int4.h" /* needed for tp.h */
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#include "tp.h" /* needed for T_BEGIN_READ_NONTP_OR_TP macro */
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#include "t_end.h"
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#include "t_retry.h"
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#include "t_begin.h"
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#include "gvcst_expand_key.h"
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#include "gvcst_protos.h" /* for gvcst_rtsib,gvcst_search,gvcst_search_blk,gvcst_query prototype */
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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 gd_region *gv_cur_region;
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GBLREF gv_namehead *gv_target;
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GBLREF gv_key *gv_currkey, *gv_altkey;
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GBLREF uint4 dollar_tlevel;
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GBLREF unsigned int t_tries;
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error_def(ERR_GVQUERYFAIL);
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bool gvcst_query(void)
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{
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boolean_t found, two_histories;
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enum cdb_sc status;
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blk_hdr_ptr_t bp;
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rec_hdr_ptr_t rp;
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unsigned char *c1, *c2;
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srch_blk_status *bh;
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srch_hist *rt_history;
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T_BEGIN_READ_NONTP_OR_TP(ERR_GVQUERYFAIL);
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assert(t_tries < CDB_STAGNATE || cs_addrs->now_crit); /* we better hold crit in the final retry (TP & non-TP) */
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for (;;)
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{
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two_histories = FALSE;
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if (cdb_sc_normal == (status = gvcst_search(gv_currkey, 0)))
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{
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found = TRUE;
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bh = &gv_target->hist.h[0];
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rp = (rec_hdr_ptr_t)(bh->buffaddr + bh->curr_rec.offset);
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bp = (blk_hdr_ptr_t)bh->buffaddr;
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if (rp >= (rec_hdr_ptr_t)CST_TOB(bp))
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{
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two_histories = TRUE;
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rt_history = gv_target->alt_hist;
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status = gvcst_rtsib(rt_history, 0);
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if (cdb_sc_endtree == status) /* end of tree */
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{
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found = FALSE;
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two_histories = FALSE; /* second history not valid */
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} else if (cdb_sc_normal != status)
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{
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t_retry(status);
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continue;
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} else
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{
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bh = &rt_history->h[0];
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if (cdb_sc_normal != (status = gvcst_search_blk(gv_currkey, bh)))
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{
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t_retry(status);
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continue;
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}
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rp = (rec_hdr_ptr_t)(bh->buffaddr + bh->curr_rec.offset);
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bp = (blk_hdr_ptr_t)bh->buffaddr;
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}
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}
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if (found)
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{ /* !found indicates that the end of tree has been reached (see call to
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* gvcst_rtsib). If there is no more tree, don't bother doing expansion.
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*/
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status = gvcst_expand_key((blk_hdr_ptr_t)bh->buffaddr, (int4)((sm_uc_ptr_t)rp - bh->buffaddr),
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gv_altkey);
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if (cdb_sc_normal != status)
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{
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t_retry(status);
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continue;
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}
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}
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if (!dollar_tlevel)
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{
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if ((trans_num)0 == t_end(&gv_target->hist, !two_histories ? NULL : rt_history, TN_NOT_SPECIFIED))
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continue;
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} else
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{
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status = tp_hist(!two_histories ? NULL : rt_history);
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if (cdb_sc_normal != status)
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{
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t_retry(status);
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continue;
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}
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}
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assert(cs_data == cs_addrs->hdr);
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INCR_GVSTATS_COUNTER(cs_addrs, cs_addrs->nl, n_query, 1);
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if (found)
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{
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c1 = &gv_altkey->base[0];
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c2 = &gv_currkey->base[0];
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for (; *c2;)
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{
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if (*c2++ != *c1++)
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break;
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}
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if (!*c2 && !*c1)
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{
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return TRUE;
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}
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}
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return FALSE;
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}
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t_retry(status);
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}
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}
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