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.\"
.\" Copyright (C) 1997 Jerry Epplin. All rights reserved.
.\"
.\" 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
.\"
.\" The author assumes no responsibility for errors or omissions, or for
.\" damages resulting from the use of the information contained herein.
.\"
.\" Formatted or processed versions of this manual, if unaccompanied by
.\" the source, must acknowledge the copyright and authors of this work.
.\"
.TH RTF_CREATE 2 "11 July 1997" "Real-Time Linux" "Real-Time Linux"
.SH NAME
rtf_create \- create a real-time fifo
.SH SYNOPSIS
.nf
.B #define MODULE
.B #include <linux/module.h>
.B #include <linux/kernel.h>
.B #include <linux/version.h>
.B #include <linux/errno.h>
.B #include <linux/rtf.h>
.fi
.sp
.BI "int rtf_create(unsigned int " fifo ", int " size ");
.SH DESCRIPTION
.B rtf_create
creates a real-time fifo (RT-FIFO) of size
.I size
and assigns it the identifier
.IR fifo .
.I fifo
is a value unique within the system, and must be less than RTF_NO.
.PP
The RT-FIFO is a mechanism, implemented as a character device, to
communicate between real-time tasks and ordinary Linux processes. The
rtf_* functions are used by the real-time tasks; Linux processes use
standard character device access functions such as
.BR read(2) ,
.BR write(2) ,
and
.BR select(2) .
.SH "RETURN VALUE"
On success, 0 is returned. On failure, a negative value is returned
as described below.
.SH ERRORS
.IP \fB-ENODEV\fP
.I fifo
is greater than or equal to RTF_NO.
.IP \fB-EBUSY\fP
.I fifo
is already in use. Choose a different ID.
.IP \fB-ENOMEM\fP
.I size
bytes could not be allocated for the RT-FIFO.
.SH "SEE ALSO"
.BR rtf_create_handler (2),
.BR rtf_destroy (2),
.BR rtf_get (2),
.BR rtf_put (2),
.BR rtf_resize (2),
.SH AUTHOR
This manual page was written by Jerry Epplin.
.P
Copyright (C) 1997 Jerry Epplin, placed under the GNU General Public
License, see the file copyright for details.
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