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'\" t
.\" Hey Emacs! This file is -*- nroff -*- source.
.\"
.\" Copyright (C) 2006 Michael Kerrisk <mtk.manpages@gmail.com>
.\"
.\" Permission is granted to make and distribute verbatim copies of this
.\" manual provided the copyright notice and this permission notice are
.\" preserved on all copies.
.\"
.\" Permission is granted to copy and distribute modified versions of this
.\" manual under the conditions for verbatim copying, provided that the
.\" entire resulting derived work is distributed under the terms of a
.\" permission notice identical to this one.
.\"
.\" Since the Linux kernel and libraries are constantly changing, this
.\" manual page may be incorrect or out-of-date. The author(s) assume no
.\" responsibility for errors or omissions, or for damages resulting from
.\" the use of the information contained herein. The author(s) may not
.\" have taken the same level of care in the production of this manual,
.\" which is licensed free of charge, as they might when working
.\" professionally.
.\"
.\" Formatted or processed versions of this manual, if unaccompanied by
.\" the source, must acknowledge the copyright and authors of this work.
.\"
.\" Japanese Version Copyright (c) 2006 Akihiro MOTOKI all rights reserved.
.\" Translated 2006-04-23, Akihiro MOTOKI <amotoki@dd.iij4u.or.jp>
.\" Updated 2008-11-09, Akihiro MOTOKI, LDP v3.13
.\"
.TH MQ_RECEIVE 3 2008-09-29 "Linux" "Linux Programmer's Manual"
.SH ̾
mq_receive, mq_timedreceive \- å塼å
.SH
.nf
.B #include <mqueue.h>
.sp
.BI "ssize_t mq_receive(mqd_t " mqdes ", char *" msg_ptr ,
.BI " size_t " msg_len ", unsigned *" msg_prio );
.sp
.B #define _XOPEN_SOURCE 600
.B #include <time.h>
.B #include <mqueue.h>
.sp
.BI "ssize_t mq_timedreceive(mqd_t " mqdes ", char *" msg_ptr ,
.BI " size_t " msg_len ", unsigned *" msg_prio ,
.BI " const struct timespec *" abs_timeout );
.fi
.sp
\fI\-lrt\fP ǥ롣
.SH
.BR mq_receive ()
ϡһ
.I mqdes
ǻȤå塼Ǥ⤤ͥ٤
ǤŤåΥå
.I msg_ptr
ؤХåե˳Ǽ롣
.I msg_len
ϡ
.I msg_ptr
ؤХåե礭ͤϥ塼
.I mq_msgsize
°礭ʤФʤʤ
.RB ( mq_getattr (3)
)
.I prio
NULL ʳξ硢
.I prio
ؤХåե˼åͥ٤Ǽ롣
塼ξ硢ǥեȤǤϡ
.BR mq_receive ()
ϡåϤؿƤӽФʥϥɥˤ
Ǥޤǡ (block) 롣
å塼 (message queue description)
.B O_NONBLOCK
ե饰ͭˤʤäƤϡ
.BR mq_receive ()
ϥ顼
.B EAGAIN
Ǥ˼Ԥ롣
.BR mq_timedreceive ()
.BR mq_receive ()
Ʊư뤬
å塼ǡå塼Ҥ
.B O_NONBLOCK
ե饰ͭˤʤäƤʤˡθƤӽФߤ֤ξ¤
.I abs_timeout
ؤ¤Τǻꤹۤʤ롣ξ¤ϡॢȤλ
ﵪ (Epoch; 1970 ǯ 1 1 00:00:00) ηв
(äȥʥä) ǻꤹ롣ॢȻϰʲι¤Τǻꤹ:
.sp
.in +4n
.nf
struct timespec {
time_t tv_sec; /* */
long tv_nsec; /* ʥ */
};
.fi
.in
å塼ˤʤؿƤӽФˤǤ˥ॢȻ郎
Ƥ硢
.BR mq_timedreceive ()
Ϥ֤롣
.SH ֤
ȡ
.BR mq_receive ()
.BR mq_timedreceive ()
ϼåΥХȿ֤
顼ξ硢\-1 ֤
.I errno
˥顼ͤꤹ롣
.SH 顼
.TP
.B EAGAIN
塼ǡ
.I mqdes
ǻȤå塼Ҥ
.B O_NONBLOCK
ե饰åȤƤ
.TP
.B EBADF
.I mqdes
ǻꤵ줿һҤǤ롣
.TP
.B EINTR
ؿƤӽФʥϥɥˤǤ줿
.BR signal (7)
ȡ
.TP
.B EINVAL
ؿƤӽФߤϤǤä
.I abs_timeout
Ǥä
.I abs_timeout
Ȥϡ
.I tv_sec
0 ̤⤷
.I tv_nsec
0 ̤ 1,000,000,000 礭ȤȤǤ롣
.TP
.B EMSGSIZE
.I msg_len
å塼
.I mq_msgsize
°⾮ä
.TP
.B ETIMEDOUT
åž˴ؿƤӽФॢȤ
.SH
POSIX.1-2001.
.SH
Linux Ǥϡ
.BR mq_timedreceive ()
ϥƥॳǤ롣
.BR mq_receive ()
ϥ饤֥ؿǡ
.BR mq_timedreceive ()
ƥॳѤƼƤ롣
.SH Ϣ
.BR mq_close (3),
.BR mq_getattr (3),
.BR mq_notify (3),
.BR mq_open (3),
.BR mq_send (3),
.BR mq_unlink (3),
.BR feature_test_macros (7),
.BR mq_overview (7),
.BR time (7)
|
