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<HTML
><HEAD
><TITLE
>rtl_request_irq</TITLE
><META
NAME="GENERATOR"
CONTENT="Modular DocBook HTML Stylesheet Version 1.64
"></HEAD
><BODY
CLASS="REFENTRY"
><H1
><A
NAME="AEN1"
>rtl_request_irq</A
></H1
><DIV
CLASS="REFNAMEDIV"
><A
NAME="AEN5"
></A
><H2
>Name</H2
>rtl_request_irq, rtl_free_irq -- install and remove realtime 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>
int <TT
CLASS="FUNCTION"
>rtl_request_irq</TT
>
(unsigned int <TT
CLASS="PARAMETER"
><I
>irq</I
></TT
>,
unsigned int (*<TT
CLASS="PARAMETER"
><I
>handler</I
></TT
>)(unsigned int irq, struct pt_regs *regs));
int <TT
CLASS="FUNCTION"
>rtl_free_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. <TT
CLASS="FUNCTION"
>rtl_request_irq</TT
> registers the function <TT
CLASS="PARAMETER"
><I
>handler</I
></TT
> as the interrupt handler for IRQ level <TT
CLASS="PARAMETER"
><I
>irq</I
></TT
>. The handler will be executed with hardware interrupts disabled.</P
><P
>Note: The interrupt will be disabled during the handler execution. If it is necessary to receive further interrupts from this device, you must reenable the interrupt line with the <TT
CLASS="FUNCTION"
>rtl_hard_enable_irq(3)</TT
> function.</P
><P
><TT
CLASS="FUNCTION"
>rtl_free_irq</TT
> removes the interrupt handler for IRQ level <TT
CLASS="PARAMETER"
><I
>irq</I
></TT
>.</P
></DIV
><DIV
CLASS="REFSECT1"
><A
NAME="AEN27"
></A
><H2
>RETURN VALUE</H2
><P
>All functions return 0 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_request_irq</TT
>: Interrupt handler is already installed for this interrupt level.</P
></DD
><DT
>-EINVAL</DT
><DD
><P
><TT
CLASS="FUNCTION"
>rtl_free_irq</TT
>: There is no handler currently installed for this interrupt level</P
></DD
></DL
></DIV
></DIV
><DIV
CLASS="REFSECT1"
><A
NAME="AEN43"
></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="AEN47"
></A
><H2
>SEE ALSO</H2
><A
HREF="rtl_hard_enable_irq.3.html"
TARGET="_top"
>rtl_hard_enable_irq(3)</A
>, <A
HREF="rtl_hard_disable_irq.3.html"
TARGET="_top"
>rtl_hard_disable_irq(3)</A
><P
>2001 FSMLabs Inc.</P
><P
>All rights reserved.</P
></DIV
></BODY
></HTML
>
|
