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<HTML
><HEAD
><TITLE
>rtl_free_soft_irq</TITLE
><META
NAME="GENERATOR"
CONTENT="Modular DocBook HTML Stylesheet Version 1.64
"></HEAD
><BODY
CLASS="REFENTRY"
><H1
><A
NAME="AEN1"
>rtl_free_soft_irq</A
></H1
><DIV
CLASS="REFNAMEDIV"
><A
NAME="AEN5"
></A
><H2
>Name</H2
>rtl_free_soft_irq, rtl_get_soft_irq -- install and remove software interrupt handlers</DIV
><DIV
CLASS="REFSYNOPSISDIV"
><A
NAME="AEN9"
></A
><H2
>Synopsis</H2
><TABLE
BORDER="0"
BGCOLOR="#E0E0E0"
WIDTH="100%"
><TR
><TD
><PRE
CLASS="SYNOPSIS"
> #include <rtl_core.h.h>
int <TT
CLASS="FUNCTION"
>rtl_get_soft_irq</TT
>(void (*<TT
CLASS="PARAMETER"
><I
>handler</I
></TT
>)(int, void *, struct pt_regs *), const char * <TT
CLASS="PARAMETER"
><I
>devname</I
></TT
>);
void <TT
CLASS="FUNCTION"
>rtl_free_soft_irq</TT
>(unsigned int <TT
CLASS="PARAMETER"
><I
>irq</I
></TT
>);</PRE
></TD
></TR
></TABLE
></DIV
><DIV
CLASS="REFSECT1"
><A
NAME="AEN16"
></A
><H2
>DESCRIPTION</H2
><P
>These functions are specific to Realtime Linux.</P
><P
><TT
CLASS="FUNCTION"
>rtl_get_soft_irq</TT
> allocates a software interrupt vector and registers the function <TT
CLASS="FUNCTION"
>handler</TT
> as the interrupt handler for the allocated software interrupt. The devname string is shown in /proc/interrupts for every soft interrupt handler installed. The software interrupt can later be triggered by the <TT
CLASS="FUNCTION"
>rtl_global_pend_irq(3)</TT
> function.</P
><P
><TT
CLASS="FUNCTION"
>rtl_free_soft_irq</TT
> uninstalls the specified software interrupt handler.</P
><P
>The software interrupt handler will be executed in the Linux kernel context so it can call any functions that are normally allowed to be called from Linux interrupt handlers.</P
></DIV
><DIV
CLASS="REFSECT1"
><A
NAME="AEN26"
></A
><H2
>RETURN VALUE</H2
><P
><TT
CLASS="FUNCTION"
>rtl_get_soft_irq</TT
> returns the allocated vector number on success and a negative error code on error.</P
></DIV
><DIV
CLASS="REFSECT1"
><A
NAME="AEN30"
></A
><H2
>ERRORS</H2
><P
></P
><DIV
CLASS="VARIABLELIST"
><DL
><DT
>-EBUSY</DT
><DD
><P
><TT
CLASS="FUNCTION"
>rtl_get_soft_irq</TT
>: Could not allocate a software interrupt vector.</P
></DD
></DL
></DIV
></DIV
><DIV
CLASS="REFSECT1"
><A
NAME="AEN38"
></A
><H2
>NOTES</H2
><P
>These functions can only be called in the Linux kernel mode.</P
></DIV
><DIV
CLASS="REFSECT1"
><A
NAME="AEN41"
></A
><H2
>AUTHOR</H2
><P
>Michael Barabanov (<A
HREF="mailto:baraban@fsmlabs.com"
TARGET="_top"
>baraban@fsmlabs.com</A
>)</P
></DIV
><DIV
CLASS="REFSECT1"
><A
NAME="AEN45"
></A
><H2
>SEE ALSO</H2
><A
HREF="rtl_global_pend_irq.3.html"
TARGET="_top"
>rtl_global_pend_irq</A
><P
>2001 FSMLabs Inc.</P
><P
>All rights reserved.</P
></DIV
></BODY
></HTML
>
|
