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<HTML
><HEAD
><TITLE
>rt_task_init</TITLE
><META
NAME="GENERATOR"
CONTENT="Modular DocBook HTML Stylesheet Version 1.64
"></HEAD
><BODY
CLASS="REFENTRY"
><H1
><A
NAME="AEN1"
>rt_task_init</A
></H1
><DIV
CLASS="REFNAMEDIV"
><A
NAME="AEN5"
></A
><H2
>Name</H2
>rt_task_init -- create a realtime task</DIV
><DIV
CLASS="REFSYNOPSISDIV"
><A
NAME="AEN8"
></A
><H2
>Synopsis</H2
><TABLE
BORDER="0"
BGCOLOR="#E0E0E0"
WIDTH="100%"
><TR
><TD
><PRE
CLASS="SYNOPSIS"
> <I
CLASS="EMPHASIS"
>WARNING</I
> --
This is an RTLinux v1.x compatibility function.
For new programs, please see <TT
CLASS="FUNCTION"
>pthread_create(3)</TT
>.
#define MODULE
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/version.h>
#include <linux/errno.h>
#include <linux/rtf.h>
#include <asm/rt_irq.h>
int <TT
CLASS="FUNCTION"
>rt_task_init</TT
>(RT_TASK *<TT
CLASS="PARAMETER"
><I
>task</I
></TT
>, void (*fn)(int <TT
CLASS="PARAMETER"
><I
>data</I
></TT
>), int <TT
CLASS="PARAMETER"
><I
>data</I
></TT
>, int <TT
CLASS="PARAMETER"
><I
>stack_size</I
></TT
>, int <TT
CLASS="PARAMETER"
><I
>priority</I
></TT
>);</PRE
></TD
></TR
></TABLE
></DIV
><DIV
CLASS="REFSECT1"
><A
NAME="AEN18"
></A
><H2
>WARNING</H2
><P
>This is an RTLinux v1.x compatibility function.
For new programs, please see <TT
CLASS="FUNCTION"
>pthread_create(3)</TT
>.</P
></DIV
><DIV
CLASS="REFSECT1"
><A
NAME="AEN22"
></A
><H2
>DESCRIPTION</H2
><P
><TT
CLASS="FUNCTION"
>rt_task_init</TT
> creates a realtime task. <TT
CLASS="PARAMETER"
><I
>task</I
></TT
> is a structure the space for which must be provided by the application. <TT
CLASS="PARAMETER"
><I
>task</I
></TT
> must be present during the lifetime of the realtime task; thus it cannot be an automatic variable. <TT
CLASS="PARAMETER"
><I
>fn</I
></TT
> is the entry point of the new task. The parent task can send a one-integer value data to the new task. <TT
CLASS="PARAMETER"
><I
>stack_size</I
></TT
> is the size of the stack to be used by the new task, and <TT
CLASS="PARAMETER"
><I
>priority</I
></TT
> is the priority to be given the task. The highest priority is 1, while the lowest is <TT
CLASS="PARAMETER"
><I
>RT_LOWEST_PRIORITY</I
></TT
>.</P
><P
>The newly created real-time task is initially dormant. It is normally made active by a call to <TT
CLASS="FUNCTION"
>rt_task_make_periodic</TT
>.</P
></DIV
><DIV
CLASS="REFSECT1"
><A
NAME="AEN34"
></A
><H2
>RETURN VALUE</H2
><P
> On success, 0 is returned. On failure, a negative value is returned as described below.</P
></DIV
><DIV
CLASS="REFSECT1"
><A
NAME="AEN37"
></A
><H2
>ERRORS</H2
><P
></P
><DIV
CLASS="VARIABLELIST"
><DL
><DT
>-EINVAL</DT
><DD
><P
><TT
CLASS="PARAMETER"
><I
>task</I
></TT
> is already in use by another task.</P
></DD
><DT
>-ENOMEM</DT
><DD
><P
>space could not be allocated for the realtime task.</P
></DD
></DL
></DIV
></DIV
><DIV
CLASS="REFSECT1"
><A
NAME="AEN49"
></A
><H2
>AUTHOR</H2
><P
>Jerry Epplin, modified by Michael Barabanov (<A
HREF="mailto:baraban@fs mlabs.com"
TARGET="_top"
>baraban@fsmlabs.com</A
>)</P
></DIV
><DIV
CLASS="REFSECT1"
><A
NAME="AEN53"
></A
><H2
>SEE ALSO</H2
><A
HREF="rt_task_delete.3.html"
TARGET="_top"
>rt_task_delete(3)</A
>, <A
HREF="rt_task_make_periodic.3.html"
TARGET="_top"
>rt_task_make_periodic(3)</A
>, <A
HREF="rt_task_suspend.3.html"
TARGET="_top"
>rt_task_suspend(3)</A
>, <A
HREF="rt_task_wait.3.html"
TARGET="_top"
>rt_task_wait(3)</A
>, <A
HREF="pthread_create.3.html"
TARGET="_top"
>pthread_create(3)</A
><P
>1997 Jerry Epplin.</P
><P
>Modifications for RTLinux 2.x and 3.x by Michael Barabanov. 2001 FSMLabs Inc.</P
><P
>All rights reserved.</P
></DIV
></BODY
></HTML
>
|
