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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN""http://www.w3.org/TR/html4/loose.dtd">
<HTML
><HEAD
><TITLE
>raw1394_start_lock64</TITLE
><META
NAME="GENERATOR"
CONTENT="Modular DocBook HTML Stylesheet Version 1.79"><LINK
REL="HOME"
TITLE="libraw1394"
HREF="index.html"><LINK
REL="UP"
TITLE="Function Reference"
HREF="c232.html"><LINK
REL="PREVIOUS"
TITLE="raw1394_start_lock"
HREF="r2458.html"><LINK
REL="NEXT"
TITLE="raw1394_start_async_stream"
HREF="r2630.html"></HEAD
><BODY
CLASS="refentry"
BGCOLOR="#FFFFFF"
TEXT="#000000"
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ALINK="#0000FF"
><DIV
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><TR
><TH
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ALIGN="center"
>libraw1394: version 2.0.4</TH
></TR
><TR
><TD
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><A
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>Prev</A
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></TD
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></TABLE
><HR
ALIGN="LEFT"
WIDTH="100%"></DIV
><H1
><A
NAME="API-raw1394-start-lock64"
></A
><SPAN
CLASS="phrase"
><SPAN
CLASS="phrase"
>raw1394_start_lock64</SPAN
></SPAN
></H1
><DIV
CLASS="refnamediv"
><A
NAME="AEN2554"
></A
><H2
>Name</H2
>raw1394_start_lock64&nbsp;--&nbsp;
     initiate a 64-bit compare-swap lock transaction
 </DIV
><DIV
CLASS="refsynopsisdiv"
><A
NAME="AEN2557"
></A
><H2
>Synopsis</H2
><DIV
CLASS="funcsynopsis"
><P
></P
><A
NAME="AEN2559"
></A
><P
><CODE
><CODE
CLASS="FUNCDEF"
>int raw1394_start_lock64 </CODE
>(raw1394handle_t handle, nodeid_t node, nodeaddr_t addr, unsigned int extcode, octlet_t data, octlet_t arg, octlet_t * result, unsigned long tag);</CODE
></P
><P
></P
></DIV
></DIV
><DIV
CLASS="refsect1"
><A
NAME="AEN2579"
></A
><H2
>Arguments</H2
><P
></P
><DIV
CLASS="variablelist"
><DL
><DT
><CODE
CLASS="parameter"
>handle</CODE
></DT
><DD
><P
>&#13;     libraw1394 handle
    </P
></DD
><DT
><CODE
CLASS="parameter"
>node</CODE
></DT
><DD
><P
>&#13;     target node ID
    </P
></DD
><DT
><CODE
CLASS="parameter"
>addr</CODE
></DT
><DD
><P
>&#13;     address to read from
    </P
></DD
><DT
><CODE
CLASS="parameter"
>extcode</CODE
></DT
><DD
><P
>&#13;     extended transaction code determining the lock operation
    </P
></DD
><DT
><CODE
CLASS="parameter"
>data</CODE
></DT
><DD
><P
>&#13;     data part of lock parameters
    </P
></DD
><DT
><CODE
CLASS="parameter"
>arg</CODE
></DT
><DD
><P
>&#13;     arg part of lock parameters
    </P
></DD
><DT
><CODE
CLASS="parameter"
>result</CODE
></DT
><DD
><P
>&#13;     address where return value will be written
    </P
></DD
><DT
><CODE
CLASS="parameter"
>tag</CODE
></DT
><DD
><P
>&#13;     data to identify the request to completion handler
    </P
></DD
></DL
></DIV
></DIV
><DIV
CLASS="refsect1"
><A
NAME="AEN2622"
></A
><H2
>Description</H2
><P
>&#13;   This function starts the specified lock request.
   The transaction is only started, no success of the transaction is implied
   with a successful return of this function.  When the transaction completes, a
   <CODE
CLASS="function"
>raw1394_loop_iterate</CODE
> will call the tag handler and pass it the tag and
   error code of the transaction.  <CODE
CLASS="parameter"
>tag</CODE
> should therefore be set to something
   that uniquely identifies this transaction (e.g. a struct pointer casted to
   unsigned long).
</P
></DIV
><DIV
CLASS="refsect1"
><A
NAME="AEN2627"
></A
><H2
>Returns</H2
><P
>&#13;   0 on success or -1 on failure (sets errno)
</P
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><SPAN
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>raw1394_start_lock</SPAN
></SPAN
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>