100 lines
2.4 KiB
C
100 lines
2.4 KiB
C
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/****************************************************************
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* *
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* Copyright 2001, 2004 Sanchez Computer Associates, 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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#if defined(VMS)
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#include <ssdef.h>
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#endif
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#if defined(UNIX)
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#include <signal.h>
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#endif
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#include "gdsroot.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 "mlkdef.h"
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#include "cmidef.h"
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#include "hashtab_mname.h" /* needed for cmmdef.h */
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#include "cmmdef.h"
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#include "gt_timer.h"
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#include "gtcmlkdef.h"
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#include "ast.h"
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#include "gtcml.h"
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#include "gtcm_action_pending.h"
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GBLREF relque action_que;
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GBLREF gd_region *gv_cur_region;
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GBLREF struct NTD *ntd_root;
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void gtcml_chkprc(cm_lckblklck *lck)
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{
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cm_lckblkprc *prc, *prc1;
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boolean_t found;
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long status;
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CMI_MUTEX_DECL;
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error_def(CMERR_CMINTQUE);
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CMI_MUTEX_BLOCK;
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found = FALSE;
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prc = lck->prc;
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/* it appears that the design assumes that prc should never be null, but we have empirical evidence that it happens.
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* because we do not (at the moment of writing) have resources to pursue the discrepancy, we simply protect
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* against it, and hope that we don't encounter other symptoms
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*/
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while ((FALSE == found) && (NULL != prc))
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{
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if (CMMS_L_LKACQUIRE != prc->user->state || prc->user->transnum == prc->user->lk_cancel)
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{
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prc->next->last = prc->last;
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prc->last->next = prc->next;
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prc1 = prc->next;
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if (prc->next == prc)
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lck->prc = 0;
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else if (prc == lck->prc)
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lck->prc = prc1;
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free(prc);
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if (!lck->prc || prc1->next == lck->prc)
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break;
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prc = prc1;
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continue;
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}
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if (lck->sequence != lck->node->sequence)
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{
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lck->sequence = lck->node->sequence;
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found = TRUE;
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} else
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{
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if (prc->next == lck->prc)
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break;
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prc = prc->next;
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}
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}
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if (found)
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{
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status = gtcm_action_pending(prc->user);
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if (INTERLOCK_FAIL == status)
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rts_error(VARLSTCNT(1) CMERR_CMINTQUE);
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prc->next->last = prc->last;
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prc->last->next = prc->next;
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if (prc->next == prc)
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lck->prc = 0;
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else if (prc == lck->prc)
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lck->prc = prc->next;
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free(prc);
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}
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CMI_MUTEX_RESTORE;
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}
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