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102 lines
2.7 KiB
C
102 lines
2.7 KiB
C
/*-
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* See the file LICENSE for redistribution information.
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*
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* Copyright (c) 1996-2002
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* Sleepycat Software. All rights reserved.
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*/
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#include "db_config.h"
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#ifndef lint
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static const char revid[] = "$Id: txn_stat.c,v 11.15 2002/04/26 23:00:36 bostic Exp $";
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#endif /* not lint */
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#ifndef NO_SYSTEM_INCLUDES
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#include <sys/types.h>
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#include <string.h>
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#endif
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#include "db_int.h"
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#include "dbinc/txn.h"
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/*
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* __txn_stat --
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*
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* PUBLIC: int __txn_stat __P((DB_ENV *, DB_TXN_STAT **, u_int32_t));
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*/
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int
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__txn_stat(dbenv, statp, flags)
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DB_ENV *dbenv;
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DB_TXN_STAT **statp;
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u_int32_t flags;
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{
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DB_TXNMGR *mgr;
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DB_TXNREGION *region;
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DB_TXN_STAT *stats;
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TXN_DETAIL *txnp;
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size_t nbytes;
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u_int32_t ndx;
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int ret;
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PANIC_CHECK(dbenv);
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ENV_REQUIRES_CONFIG(dbenv, dbenv->tx_handle, "txn_stat", DB_INIT_TXN);
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*statp = NULL;
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if ((ret = __db_fchk(dbenv,
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"DB_ENV->txn_stat", flags, DB_STAT_CLEAR)) != 0)
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return (ret);
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mgr = dbenv->tx_handle;
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region = mgr->reginfo.primary;
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/*
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* Allocate for the maximum active transactions -- the DB_TXN_ACTIVE
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* struct is small and the maximum number of active transactions is
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* not going to be that large. Don't have to lock anything to look
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* at the region's maximum active transactions value, it's read-only
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* and never changes after the region is created.
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*/
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nbytes = sizeof(DB_TXN_STAT) + sizeof(DB_TXN_ACTIVE) * region->maxtxns;
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if ((ret = __os_umalloc(dbenv, nbytes, &stats)) != 0)
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return (ret);
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R_LOCK(dbenv, &mgr->reginfo);
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memcpy(stats, ®ion->stat, sizeof(*stats));
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stats->st_last_txnid = region->last_txnid;
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stats->st_last_ckp = region->last_ckp;
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stats->st_time_ckp = region->time_ckp;
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stats->st_txnarray = (DB_TXN_ACTIVE *)&stats[1];
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ndx = 0;
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for (txnp = SH_TAILQ_FIRST(®ion->active_txn, __txn_detail);
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txnp != NULL;
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txnp = SH_TAILQ_NEXT(txnp, links, __txn_detail)) {
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stats->st_txnarray[ndx].txnid = txnp->txnid;
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if (txnp->parent == INVALID_ROFF)
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stats->st_txnarray[ndx].parentid = TXN_INVALID;
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else
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stats->st_txnarray[ndx].parentid =
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((TXN_DETAIL *)R_ADDR(&mgr->reginfo,
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txnp->parent))->txnid;
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stats->st_txnarray[ndx].lsn = txnp->begin_lsn;
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ndx++;
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}
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stats->st_region_wait = mgr->reginfo.rp->mutex.mutex_set_wait;
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stats->st_region_nowait = mgr->reginfo.rp->mutex.mutex_set_nowait;
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stats->st_regsize = mgr->reginfo.rp->size;
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if (LF_ISSET(DB_STAT_CLEAR)) {
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mgr->reginfo.rp->mutex.mutex_set_wait = 0;
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mgr->reginfo.rp->mutex.mutex_set_nowait = 0;
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memset(®ion->stat, 0, sizeof(region->stat));
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region->stat.st_maxtxns = region->maxtxns;
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region->stat.st_maxnactive =
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region->stat.st_nactive = stats->st_nactive;
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}
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R_UNLOCK(dbenv, &mgr->reginfo);
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*statp = stats;
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return (0);
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}
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