89 lines
2.3 KiB
C
89 lines
2.3 KiB
C
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/****************************************************************
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* *
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* Copyright 2001, 2009 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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#ifdef VMS
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#include <ssdef.h>
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#endif
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#include "mdef.h"
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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 "filestruct.h"
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#include "mlkdef.h"
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#include "lockdefs.h"
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/* Include prototypes */
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#include "mlk_prcblk_delete.h"
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#include "mlk_shrblk_delete_if_empty.h"
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#include "mlk_shrclean.h"
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#include "is_proc_alive.h"
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GBLREF uint4 process_id;
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void mlk_shrclean(gd_region *region,
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mlk_ctldata_ptr_t ctl,
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mlk_shrblk_ptr_t d)
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{
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mlk_shrblk_ptr_t d0, d1;
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mlk_prcblk_ptr_t p;
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int4 status, lcnt = 0, max_loop_tries;
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unsigned int time[2],icount;
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bool delete_status;
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sgmnt_addrs *csa;
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max_loop_tries = (int4)(((sm_uc_ptr_t)R2A(ctl->subtop) - (sm_uc_ptr_t)ctl) / SIZEOF(mlk_shrblk));
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/* although more than the actual, it is better than underestimating */
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for (d = d0 = (mlk_shrblk_ptr_t)R2A(d->rsib), d1 = NULL; d != d1 && max_loop_tries > lcnt; lcnt++)
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{
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delete_status = FALSE;
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if (d0->children)
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mlk_shrclean(region, ctl, (mlk_shrblk_ptr_t)R2A(d0->children));
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d1 = (mlk_shrblk_ptr_t)R2A(d0->rsib);
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if (d0->pending)
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{
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for (p = (mlk_prcblk_ptr_t)R2A(d0->pending); ; p = (mlk_prcblk_ptr_t)R2A(p->next))
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{
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if (PENDING_PROC_ALIVE(p,time,icount,status))
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{ /* process pending does not exist, free prcblk */
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p->process_id = 0;
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p->ref_cnt = 0;
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}
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if (p->next == 0)
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break;
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}
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}
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mlk_prcblk_delete(ctl, d0, 0);
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if (d0->owner)
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{
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if (PROC_ALIVE(d0,time,icount,status))
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{ /* process that owned lock has left image, free lock */
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csa = &FILE_INFO(region)->s_addrs;
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d0->owner = 0;
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d0->sequence = csa->hdr->trans_hist.lock_sequence++;
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delete_status = mlk_shrblk_delete_if_empty(ctl,d0);
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}
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}else
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delete_status = mlk_shrblk_delete_if_empty(ctl,d0);
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if (delete_status && d0 == d)
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{
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d = d0 = (d0 == d1) ? NULL : d1;
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d1 = NULL;
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}
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else
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d0 = d1;
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}
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return;
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}
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