.\" Copyright (c) 1990, 1993
.\"	The Regents of the University of California.  All rights reserved.
.\"
.\" Redistribution and use in source and binary forms, with or without
.\" modification, are permitted provided that the following conditions
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.\" 2. Redistributions in binary form must reproduce the above copyright
.\"    notice, this list of conditions and the following disclaimer in the
.\"    documentation and/or other materials provided with the distribution.
.\" 3. All advertising materials mentioning features or use of this software
.\"    must display the following acknowledgement:
.\"	This product includes software developed by the University of
.\"	California, Berkeley and its contributors.
.\" 4. Neither the name of the University nor the names of its contributors
.\"    may be used to endorse or promote products derived from this software
.\"    without specific prior written permission.
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.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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.\"	@(#)mpool.3	8.1 (Berkeley) 6/4/93
.\"
.\" Japanese Version Copyright (c) 1999 Shouichi Saito
.\"	all rights reserved.
.\" Translated Mon Jul 26 21:51:36 JST 1999
.\"	by Shouichi Saito <ss236rx@ymg.urban.ne.jp>
.\" Proofed Tue Aug 19 1999 by NAKANO Takeo <nakano@apm.seikei.ac.jp>
.\"
.\"WORD:        descriptor      ǥץ
.TH MPOOL 3 1993-06-04 
.UC 7
.SH ̾
mpool \- ͭХåեס
.SH 
.nf
.ft B
#include <db.h>
#include <mpool.h>

MPOOL *
mpool_open (DBT *key, int fd, pgno_t pagesize, pgno_t maxcache);
 
void
mpool_filter (MPOOL *mp, void (*pgin)(void *, pgno_t, void *),
.ti +5
void (*pgout)(void *, pgno_t, void *), void *pgcookie);

void *
mpool_new (MPOOL *mp, pgno_t *pgnoaddr);

void *
mpool_get (MPOOL *mp, pgno_t pgno, u_int flags);

int
mpool_put (MPOOL *mp, void *pgaddr, u_int flags);

int
mpool_sync (MPOOL *mp);

int
mpool_close (MPOOL *mp);
.ft R
.fi
.SH 
.IR mpool
ϡեФڡظΥХåե
饤֥ꥤ󥿡եǤ롣
.PP
ؿ
.I mpool_open
ϥס롣
.I key
ϥХʸǤꡢХåեͭʣץ
ǤΥͥ˻Ȥ롣
եХåեͭ˥ޥåפȡ
ƱȤץƥХåեͭ롣
.I key
 NULL ȡХåեϥץ饤١Ȥʥ˳դ롣
.I fd
ϤȤˤʤեΥեǥץǤ롣
ΥեǥץϥǽǤʤƤϤʤʤ
.I key
 NULL ǤʤĴ˥ޥåפƤե˥ޥå硢
.I fd
̵뤵롣
.PP
.I pagesize
ϥХñ̤ǤΥڡǤꡢեϤΥʬ䤵롣
.I maxcache
ϴե򥭥å夹ȤѤڡǤ롣
ͤϥեХåեͭƤץοˤϴطʤ
եͭץꤷκͤºݤѤ롣
.PP
ؿ
.I mpool_filter
ƩŪʥڡϽǽˤ롣
ؿ
.I pgin
ꤵƤȡ
ե뤫סɤ߹ޤ٤ˤδؿƤӽФ롣
ؿ
.I pgout
ꤵƤȡ
Хåեե˽񤭽Ф٤ˤδؿƤӽФ롣
ɤδؿ⡢
.I pgcookie
ݥ󥿡ڡɤ߽񤭤ڡؤΥݥ󥿤ˤȤ롣
.PP
ؿ
.I mpool_new
 MPOOL ݥ󥿤ȥɥ쥹ˤȤ롣
ڡƲǽʾ硢ڡؤΥݥ󥿤֤졢
ڡ
.I pgnoaddr
ɥ쥹Ǽ롣
ƤԲǽʾ NULL ֤졢 errno åȤ롣
.PP
ؿ
.I mpool_get
 MPOOL ݥ󥿤ȥڡˤȤ롣ڡ¸ߤƤȡ
ڡؤΥݥ󥿤֤롣
¸ߤƤʤ NULL ֤졢 errno åȤ롣
flag ѥ᡼ϸ߻ѤƤʤ
.PP
ؿ
.I mpool_put

.IR pgaddr
Ȥڡ롣
.I pgaddr
ϰ
.I mpool_get

.I mpool_new
֤ɥ쥹ǤʤФʤʤ
flag ͤϰʲͤΤ줫¤Ǥ롣
.TP
MPOOL_DIRTY
ڡѹƤꡢե˽񤭽Фɬפ롣
.PP
.I mpool_put
 0 򡢥顼 \-1 ֤
.PP
ؿ
.I mpool_sync
 MPOOL ݥ󥿤μڡΤ
ѹ줿Τƥե˽񤭽Ф
.I mpool_sync
 0 򡢥顼 \-1 ֤
.PP
ؿ
.I mpool_close
ϥס륯åμƺѤߤΥ롣
ѹ줿ڡϥե\fB񤭽Фʤ\fP
.I mpool_close
 0 򡢥顼 \-1 ֤
.SH 顼
ؿ
.I mpool_open
ϼԤȥ饤֥롼
.IR malloc (3)
ǻꤵƤ륨顼˱
.I errno
򥻥åȤ롣
.PP
ؿ
.I mpool_get
ϼԤȼΤ褦
.I errno
򥻥åȤ롣
.TP 15
[EINVAL]
׵Τä쥳ɤ¸ߤʤ
.PP
ؿ
.I mpool_new

.I mpool_get
ϼԤȥ饤֥롼
.IR read (2) ,
.IR write (2) ,
.IR malloc (3)
ǻꤵƤ륨顼˱
.I errno
򥻥åȤ롣
.PP
ؿ
.I mpool_sync
ϼԤȥ饤֥롼
.IR write (2)
ǻꤵƤ륨顼˱
.I errno
򥻥åȤ롣
.PP
ؿ
.I mpool_close
ϼԤȥ饤֥롼
.IR free (3)
ǻꤵƤ륨顼˱
.I errno
򥻥åȤ롣
.SH Ϣ
.IR dbopen (3),
.IR btree (3),
.IR hash (3),
.IR recno (3)