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.\"
.\" epoll by Davide Libenzi ( efficient event notification retrieval )
.\" Copyright (C) 2003 Davide Libenzi
.\"
.\" This program is free software; you can redistribute it and/or modify
.\" it under the terms of the GNU General Public License as published by
.\" the Free Software Foundation; either version 2 of the License, or
.\" (at your option) any later version.
.\"
.\" This program is distributed in the hope that it will be useful,
.\" but WITHOUT ANY WARRANTY; without even the implied warranty of
.\" MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
.\" GNU General Public License for more details.
.\"
.\" You should have received a copy of the GNU General Public License
.\" along with this program; if not, write to the Free Software
.\" Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
.\"
.\" Davide Libenzi <davidel@xmailserver.org>
.\"
.\" 2007-04-30: mtk, Added description of epoll_pwait()
.\"
.\" Japanese Version Copyright (c) 2004-2005 Yuichi SATO
.\" all rights reserved.
.\" Translated Wed Jun 16 03:05:40 JST 2004
.\" by Yuichi SATO <ysato444@yahoo.co.jp>
.\" Updated & Modified Tue Apr 19 07:05:42 JST 2005 by Yuichi SATO
.\" Updated 2007-06-02, Akihiro MOTOKI <amotoki@dd.iij4u.or.jp>, LDP v2.51
.\"
.TH EPOLL_WAIT 2 2007-12-19 "Linux" "Linux Programmer's Manual"
.SH ̾
epoll_wait, epoll_pwait \- epoll եǥץ I/O ٥ȤԤ
.SH
.nf
.B #include <sys/epoll.h>
.sp
.BI "int epoll_wait(int " epfd ", struct epoll_event *" events ,
.BI " int " maxevents ", int " timeout );
.BI "int epoll_pwait(int " epfd ", struct epoll_event *" events ,
.BI " int " maxevents ", int " timeout ,
.BI " const sigset_t *" sigmask );
.fi
.SH
.BR epoll_wait ()
ƥॳϡ
.B epoll
եǥץ
.I epfd
Υ٥Ȥ
.I timeout
ߥԤġ
.I events
ؤΰˤϡƤӽФ¦Ѳǽʥ٥ȤǼ롣
.I maxevents
ĤΥ٥Ȥ
.BR epoll_wait ()
ˤä֤롣
.I maxevents
0 礭ʤФʤʤ
.I timeout
\-1 ˻ꤹȡ
.BR epoll_wait ()
̵¤Ԥġ
ޤ
.I timeout
0 ˻ꤹȡ
.BR epoll_wait ()
ϥ٥ȤѲǽǤʤƤ⡢֤ (֤ͤ 0 Ǥ)
.I struct epoll_event
ϰʲΤ褦:
.sp
.in +4n
.nf
typedef union epoll_data {
void *ptr;
int fd;
uint32_t u32;
uint64_t u64;
} epoll_data_t;
struct epoll_event {
uint32_t events; /* epoll ٥ */
epoll_data_t data; /* 桼ǡѿ */
};
.fi
.in
֤빽¤Τ
.I data
Фˤϡ桼
.BR epoll_ctl (2)
.RB ( EPOLL_CTL_ADD ", " EPOLL_CTL_MOD )
ǻꤷǡǼ롣
.I events
Фˤ֤줿Ѳǽʥ٥ȤΥӥåȥեɤǼ롣
.SS epoll_pwait()
.BR epoll_wait ()
.BR epoll_pwait ()
δطϡ
.BR select (2)
.BR pselect (2)
δطƱͤǤ롣
.BR pselect (2)
Ʊ͡
.BR epoll_pwait ()
ȤȡץꥱϡեǥץǤ֤ˤʤ뤫
ʥ뤬ªޤǡԤĤȤǤ롣
ʲ
.BR epoll_pwait ()
θƤӽФϡ
.nf
ready = epoll_pwait(epfd, &events, maxevents, timeout, &sigmask);
.fi
θƤӽФ
.I atomic
˼¹ԤΤǤ롣
.nf
sigset_t origmask;
sigprocmask(SIG_SETMASK, &sigmask, &origmask);
ready = epoll_wait(epfd, &events, maxevents, timeout);
sigprocmask(SIG_SETMASK, &origmask, NULL);
.fi
.SH ֤
硢
.BR epoll_wait ()
ᤵ줿 I/O ФƽǤƤեǥץο֤
ޤᤵ줿
.I timeout
ߥäδ֤˥եǥץǤʤϡ0 ֤
顼ä硢
.BR epoll_wait ()
\-1 ֤
.I errno
Ŭڤꤹ롣
.SH 顼
.TP
.B EBADF
.I epfd
ͭʥեǥץǤʤ
.TP
.B EFAULT
.I events
ǻؤΰ˽߸¤ǥǤʤ
.TP
.B EINTR
ᤵ줿ɤΥ٥Ȥȯ
.I timeout
δ¤ڤˡƥॳ뤬ʥϥɥˤäƳޤ줿
.TP
.B EINVAL
.I epfd
.B epoll
եǥץǤʤ
ޤ
.I maxevents
0 ʲǤ롣
.SH С
.BR epoll_pwait ()
ϥͥ 2.6.19 Linux ɲä줿
.BR epoll_pwait ()
glibc ǤΥݡȤ glibc 2.6 ʹߤƤ롣
.SH
.BR epoll_wait ()
Linux ȼǤꡢͥ 2.5.44 Ƴ줿
.\" ե Linux ͥ 2.5.66 dzꤵ٤Ǥ롣
.SH Ϣ
.BR epoll_create (2),
.BR epoll_ctl (2),
.BR epoll (7)
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