.\" Copyright (c) 1990, 1993
.\"	The Regents of the University of California.  All rights reserved.
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.\"    must display the following acknowledgement:
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.\" 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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.\"	@(#)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 "" "Linux Programmer's Manual"
.UC 7
.SH ̾
mpool \- ͭХåեס
.SH 
.nf
.B #include <db.h>
.B #include <mpool.h>
.sp
.BI "MPOOL *mpool_open(DBT *" key ", int " fd ", pgno_t " pagesize \
", pgno_t " maxcache );
.sp
.BI "void mpool_filter(MPOOL *" mp ", void (*pgin)(void *, pgno_t, void *),"
.BI "                  void (*" pgout ")(void *, pgno_t, void *),"
.BI "                  void *" pgcookie );
.sp
.BI "void *mpool_new(MPOOL *" mp ", pgno_t *" pgnoaddr );
.sp
.BI "void *mpool_get(MPOOL *" mp ", pgno_t " pgno ", unsigned int " flags );
.sp
.BI "int mpool_put(MPOOL *" mp ", void *" pgaddr ", unsigned int " flags );
.sp
.BI "int mpool_sync(MPOOL *" mp );
.sp
.BI "int mpool_close(MPOOL *" mp );
.fi
.SH 
.I mpool
ϡեФڡظΥХåե
饤֥ꥤ󥿡եǤ롣
.PP
ؿ
.BR 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
.\"NAKANO "at any one time" ϡ֤ɤʽִ֤ˤƤ ()פǤ
.\"NAKANO άǽǤ礦
ͤϥեХåեͭƤץοˤϴطʤ
եͭץꤷκͤºݤѤ롣
.PP
ؿ
.BR mpool_filter ()
ƩŪʥڡϽǽˤ롣
ؿ
.I pgin
ꤵƤȡ
ե뤫סɤ߹ޤ٤ˤδؿƤӽФ롣
ؿ
.I pgout
ꤵƤȡ
Хåեե˽񤭽Ф٤ˤδؿƤӽФ롣
ɤδؿ⡢
.I pgcookie
ݥ󥿡ڡɤ߽񤭤ڡؤΥݥ󥿤ˤȤ롣
.PP
ؿ
.BR mpool_new ()

.I MPOOL
ݥ󥿤ȥɥ쥹ˤȤ롣
ڡƲǽʾ硢ڡؤΥݥ󥿤֤졢
ڡ
.I pgnoaddr
ɥ쥹Ǽ롣
ƤԲǽʾ NULL ֤졢 
.I errno
åȤ롣
.PP
ؿ
.BR mpool_get ()

.I MPOOL
ݥ󥿤ȥڡˤȤ롣ڡ¸ߤƤȡ
ڡؤΥݥ󥿤֤롣
¸ߤƤʤ NULL ֤졢 
.I errno
åȤ롣
.I flags
ϸ߻ѤƤʤ
.PP
ؿ
.BR mpool_put ()

.I pgaddr
Ȥڡ롣
.I pgaddr
ϰ
.BR mpool_get ()

.BR mpool_new ()
֤ɥ쥹ǤʤФʤʤ
flag ͤϰʲͤΤ줫¤Ǥ롣
.TP
.B MPOOL_DIRTY
ڡѹƤꡢե˽񤭽Фɬפ롣
.PP
.BR mpool_put ()
 0 򡢥顼 \-1 ֤
.PP
ؿ
.BR mpool_sync ()

.I MPOOL
ݥ󥿤μڡΤ
ѹ줿Τƥե˽񤭽Ф
.BR mpool_sync ()
 0 򡢥顼 \-1 ֤
.PP
ؿ
.BR mpool_close ()
ϥס륯åμƺѤߤΥ롣
ѹ줿ڡϥե\fB񤭽Фʤ\fP
.I mpool_close ()
 0 򡢥顼 \-1 ֤
.SH 顼
ؿ
.BR mpool_open ()
ϼԤȥ饤֥롼
.BR malloc (3)
ǻꤵƤ륨顼˱
.I errno
򥻥åȤ롣
.PP
ؿ
.BR mpool_get ()
ϼԤȼΤ褦
.I errno
򥻥åȤ롣
.TP 15
.B EINVAL
׵Τä쥳ɤ¸ߤʤ
.PP
ؿ
.BR mpool_new ()

.BR mpool_get ()
ϼԤȥ饤֥롼
.BR read (2),
.BR write (2),
.BR malloc (3)
ǻꤵƤ륨顼˱
.I errno
򥻥åȤ롣
.PP
ؿ
.BR mpool_sync ()
ϼԤȥ饤֥롼
.BR write (2)
ǻꤵƤ륨顼˱
.I errno
򥻥åȤ롣
.PP
ؿ
.BR mpool_close ()
ϼԤȥ饤֥롼
.BR free (3)
ǻꤵƤ륨顼˱
.I errno
򥻥åȤ롣
.SH 
POSIX.1-2001 ˤϤʤ
BSD Ϥ¸ߤ롣
.SH Ϣ
.BR btree (3),
.BR dbopen (3),
.BR hash (3),
.BR recno (3)