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/*-
* See the file LICENSE for redistribution information.
*
* Copyright (c) 2004
* Sleepycat Software. All rights reserved.
*
* $Id: seq_stat.c,v 1.19 2004/09/28 17:28:15 bostic Exp $
*/
#include "db_config.h"
#ifdef HAVE_SEQUENCE
#ifndef NO_SYSTEM_INCLUDES
#include <sys/types.h>
#include <stdlib.h>
#include <string.h>
#endif
#include "db_int.h"
#include "dbinc_auto/sequence_ext.h"
#include "dbinc/db_page.h"
#include "dbinc/db_am.h"
#ifdef HAVE_STATISTICS
static int __seq_print_all __P((DB_SEQUENCE *, u_int32_t));
static int __seq_print_stats __P((DB_SEQUENCE *, u_int32_t));
/*
* __seq_stat --
* Get statistics from the sequence.
*
* PUBLIC: int __seq_stat __P((DB_SEQUENCE *, DB_SEQUENCE_STAT **, u_int32_t));
*/
int
__seq_stat(seq, spp, flags)
DB_SEQUENCE *seq;
DB_SEQUENCE_STAT **spp;
u_int32_t flags;
{
DB *dbp;
DB_ENV *dbenv;
DB_SEQ_RECORD record;
DB_SEQUENCE_STAT *sp;
DBT data;
int ret;
dbp = seq->seq_dbp;
dbenv = dbp->dbenv;
switch (flags) {
case DB_STAT_CLEAR:
case DB_STAT_ALL:
case 0:
break;
default:
return (__db_ferr(dbenv, "DB_SEQUENCE->stat", 0));
}
/* Allocate and clear the structure. */
if ((ret = __os_umalloc(dbenv, sizeof(*sp), &sp)) != 0)
return (ret);
memset(sp, 0, sizeof(*sp));
if (seq->seq_mutexp != NULL) {
sp->st_wait = seq->seq_mutexp->mutex_set_wait;
sp->st_nowait = seq->seq_mutexp->mutex_set_nowait;
if (LF_ISSET(DB_STAT_CLEAR))
MUTEX_CLEAR(seq->seq_mutexp);
}
memset(&data, 0, sizeof(data));
data.data = &record;
data.ulen = sizeof(record);
data.flags = DB_DBT_USERMEM;
retry: if ((ret = dbp->get(dbp, NULL, &seq->seq_key, &data, 0)) != 0) {
if (ret == DB_BUFFER_SMALL &&
data.size > sizeof(seq->seq_record)) {
if ((ret = __os_malloc(dbenv,
data.size, &data.data)) != 0)
return (ret);
data.ulen = data.size;
goto retry;
}
return (ret);
}
if (data.data != &record)
memcpy(&record, data.data, sizeof(record));
sp->st_current = record.seq_value;
sp->st_value = seq->seq_record.seq_value;
sp->st_last_value = seq->seq_last_value;
sp->st_min = seq->seq_record.seq_min;
sp->st_max = seq->seq_record.seq_max;
sp->st_cache_size = seq->seq_cache_size;
sp->st_flags = seq->seq_record.flags;
*spp = sp;
if (data.data != &record)
__os_free(dbenv, data.data);
return (0);
}
/*
* __seq_stat_print --
* Print statistics from the sequence.
*
* PUBLIC: int __seq_stat_print __P((DB_SEQUENCE *, u_int32_t));
*/
int
__seq_stat_print(seq, flags)
DB_SEQUENCE *seq;
u_int32_t flags;
{
int ret;
if ((ret = __seq_print_stats(seq, flags)) != 0)
return (ret);
if (LF_ISSET(DB_STAT_ALL) &&
(ret = __seq_print_all(seq, flags)) != 0)
return (ret);
return (0);
}
static const FN __db_seq_flags_fn[] = {
{ DB_SEQ_DEC, "decrement" },
{ DB_SEQ_INC, "increment" },
{ DB_SEQ_RANGE_SET, "range set (internal)" },
{ DB_SEQ_WRAP, "wraparound at end" },
{ 0, NULL }
};
/*
* __db_get_seq_flags_fn --
* Return the __db_seq_flags_fn array.
*
* PUBLIC: const FN * __db_get_seq_flags_fn __P((void));
*/
const FN *
__db_get_seq_flags_fn()
{
return (__db_seq_flags_fn);
}
/*
* __seq_print_stats --
* Display sequence stat structure.
*/
static int
__seq_print_stats(seq, flags)
DB_SEQUENCE *seq;
u_int32_t flags;
{
DB_ENV *dbenv;
DB_SEQUENCE_STAT *sp;
int ret;
dbenv = seq->seq_dbp->dbenv;
if ((ret = __seq_stat(seq, &sp, flags)) != 0)
return (ret);
__db_dl_pct(dbenv,
"The number of sequence locks that required waiting",
(u_long)sp->st_wait,
DB_PCT(sp->st_wait, sp->st_wait + sp->st_nowait), NULL);
STAT_FMT("The current sequence value",
INT64_FMT, int64_t, sp->st_current);
STAT_FMT("The cached sequence value",
INT64_FMT, int64_t, sp->st_value);
STAT_FMT("The last cached sequence value",
INT64_FMT, int64_t, sp->st_last_value);
STAT_FMT("The minimum sequence value",
INT64_FMT, int64_t, sp->st_value);
STAT_FMT("The maximum sequence value",
INT64_FMT, int64_t, sp->st_value);
STAT_ULONG("The cache size", sp->st_cache_size);
__db_prflags(dbenv, NULL,
sp->st_flags, __db_seq_flags_fn, NULL, "\tSequence flags");
__os_ufree(seq->seq_dbp->dbenv, sp);
return (0);
}
/*
* __seq_print_all --
* Display sequence debugging information - none for now.
* (The name seems a bit strange, no?)
*/
static int
__seq_print_all(seq, flags)
DB_SEQUENCE *seq;
u_int32_t flags;
{
COMPQUIET(seq, NULL);
COMPQUIET(flags, 0);
return (0);
}
#else /* !HAVE_STATISTICS */
int
__seq_stat(seq, statp, flags)
DB_SEQUENCE *seq;
DB_SEQUENCE_STAT **statp;
u_int32_t flags;
{
COMPQUIET(statp, NULL);
COMPQUIET(flags, 0);
return (__db_stat_not_built(seq->seq_dbp->dbenv));
}
int
__seq_stat_print(seq, flags)
DB_SEQUENCE *seq;
u_int32_t flags;
{
COMPQUIET(flags, 0);
return (__db_stat_not_built(seq->seq_dbp->dbenv));
}
/*
* __db_get_seq_flags_fn --
* Return the __db_seq_flags_fn array.
*
* PUBLIC: const FN * __db_get_seq_flags_fn __P((void));
*/
const FN *
__db_get_seq_flags_fn()
{
static const FN __db_seq_flags_fn[] = {
{ 0, NULL }
};
/*
* !!!
* The Tcl API uses this interface, stub it off.
*/
return (__db_seq_flags_fn);
}
#endif /* !HAVE_STATISTICS */
#endif /* HAVE_SEQUENCE */
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