144 lines
4.2 KiB
C
144 lines
4.2 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 "gtm_string.h"
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#include "stringpool.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 "copy.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" /* prototypes */
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#include "t_retry.h"
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#include "t_begin.h"
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#include "gvcst_protos.h" /* for gvcst_search,gvcst_get prototype */
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GBLREF gv_namehead *gv_target;
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GBLREF gv_key *gv_currkey;
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GBLREF spdesc stringpool;
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GBLREF sgmnt_addrs *cs_addrs;
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GBLREF gd_region *gv_cur_region;
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GBLREF uint4 dollar_tlevel;
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GBLREF unsigned int t_tries;
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error_def(ERR_GVGETFAIL);
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boolean_t gvcst_get(mval *v)
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{
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blk_hdr_ptr_t bp;
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enum cdb_sc status;
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int key_size, data_len;
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rec_hdr_ptr_t rp;
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sm_uc_ptr_t b_top;
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srch_blk_status *bh;
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unsigned short rsiz;
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# ifdef DEBUG
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boolean_t in_op_gvget_lcl;
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# endif
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DCL_THREADGBL_ACCESS;
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SETUP_THREADGBL_ACCESS;
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DEBUG_ONLY(
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/* Store global variable in_op_gvget in a local variable and reset the global right away to ensure that the global
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* value does not incorrectly get carried over to the next call of gvcst_get (e.g. it if was from "op_fngvget").
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*/
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in_op_gvget_lcl = TREF(in_op_gvget);
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TREF(in_op_gvget) = FALSE;
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)
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T_BEGIN_READ_NONTP_OR_TP(ERR_GVGETFAIL);
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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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if (cdb_sc_normal == (status = gvcst_search(gv_currkey, NULL)))
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{
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bh = gv_target->hist.h;
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if ((key_size = gv_currkey->end + 1) == bh->curr_rec.match)
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{
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/* The following code is duplicated in gvcst_dataget. Any changes here might need
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* to be reflected there as well.
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*/
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bp = (blk_hdr_ptr_t)bh->buffaddr;
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b_top = bh->buffaddr + bp->bsiz;
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rp = (rec_hdr_ptr_t)(bh->buffaddr + bh->curr_rec.offset);
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GET_USHORT(rsiz, &rp->rsiz);
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data_len = rsiz + rp->cmpc - SIZEOF(rec_hdr) - key_size;
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if ((0 > data_len) || ((sm_uc_ptr_t)rp + rsiz > b_top))
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{
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assert(CDB_STAGNATE > t_tries);
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status = cdb_sc_rmisalign1;
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} else
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{
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ENSURE_STP_FREE_SPACE(data_len);
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assert(stringpool.top - stringpool.free >= data_len);
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memcpy(stringpool.free, (sm_uc_ptr_t)rp + rsiz - data_len, data_len);
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if (!dollar_tlevel)
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{
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if ((trans_num)0 == t_end(&gv_target->hist, NULL, TN_NOT_SPECIFIED))
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continue;
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} else
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{
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status = tp_hist(NULL);
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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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v->mvtype = MV_STR;
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v->str.addr = (char *)stringpool.free;
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v->str.len = data_len;
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stringpool.free += data_len;
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INCR_GVSTATS_COUNTER(cs_addrs, cs_addrs->nl, n_get, 1);
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return TRUE;
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}
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} else
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{
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DEBUG_ONLY(TREF(ready2signal_gvundef) = in_op_gvget_lcl;)
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if (!dollar_tlevel)
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{
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if ((trans_num)0 == t_end(&gv_target->hist, NULL, TN_NOT_SPECIFIED))
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{
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assert(FALSE == TREF(ready2signal_gvundef)); /* t_end should have reset this */
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continue;
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}
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} else
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{
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status = tp_hist(NULL);
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if (cdb_sc_normal != status)
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{
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assert(FALSE == TREF(ready2signal_gvundef)); /* tp_hist should have reset this */
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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(FALSE == TREF(ready2signal_gvundef)); /* t_end/tp_hist should have reset this up front */
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INCR_GVSTATS_COUNTER(cs_addrs, cs_addrs->nl, n_get, 1);
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return FALSE;
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}
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}
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t_retry(status);
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}
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}
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