80 lines
4.4 KiB
HTML
80 lines
4.4 KiB
HTML
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<?xml version="1.0" encoding="UTF-8"?>
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<!DOCTYPE html
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PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
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<html lang="en-us" xml:lang="en-us">
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<head>
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<meta name="DC.Type" content="reference" />
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<meta name="DC.Title" content="INVITE (Invite) keyword for ICF files" />
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<meta name="abstract" content="Use this file- or record-level keyword to invite the program device for a later read." />
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<meta name="description" content="Use this file- or record-level keyword to invite the program device for a later read." />
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<meta name="DC.subject" content="INVITE (Invite) keyword" />
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<meta name="keywords" content="INVITE (Invite) keyword" />
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<meta name="copyright" content="(C) Copyright IBM Corporation 2001, 2006" />
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<meta name="DC.Identifier" content="icfinvi" />
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<!-- All rights reserved. Licensed Materials Property of IBM -->
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<link rel="stylesheet" type="text/css" href="./ibmdita.css" />
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<link rel="stylesheet" type="text/css" href="./ic.css" />
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<title>ICF Files, INVITE</title>
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</head>
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<body id="icfinvi"><a name="icfinvi"><!-- --></a>
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<!-- Java sync-link --><script language="Javascript" src="../rzahg/synch.js" type="text/javascript"></script>
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<h1 class="topictitle1">INVITE (Invite) keyword for ICF files</h1>
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<div><p>Use this file- or record-level keyword to invite the program device
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for a later read.</p>
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<div class="section"><p>To send an invite request to the program device,
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your program issues a write operation to that program device with the INVITE
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keyword in effect.</p>
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<p>The INVITE keyword provides
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some performance improvement if your application program is doing interactive
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processing with the program device. Normally, a read request is sent to a
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device when your program issues an input operation. However, the INVITE keyword
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allows you to request the read operation when you issue the output operation.
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After the output operation is completed, your program can do other processing
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while the invited program device is sending data and the <span class="keyword">i5/OS™</span> program
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processes the received data. This might improve the performance of your program.
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When your application program is ready to process the data, it issues an
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input operation.</p>
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<p>This keyword has no parameters.</p>
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<p>The INVITE keyword
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is ignored at run time when EOS, RSPCONFIRM, or DETACH is in effect. These
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keywords must have option indicators when they apply to a record for which
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the INVITE keyword applies. If an EOS, RSPCONFIRM, or DETACH keyword with
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no option indicator applies to a record for which INVITE applies, an error
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message is issued and the INVITE keyword is ignored at creation time.</p>
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<p>You
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cannot specify INVITE with the TIMER keyword.</p>
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<p>Option indicators are
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valid for this keyword.</p>
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<p>The INVITE keyword cannot be specified at both
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the file- and record-level.</p>
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</div>
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<div class="example"><h4 class="sectiontitle">Example</h4> <p>The following example shows how to specify
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the INVITE keyword.</p>
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<pre>|...+....1....+....2....+....3....+....4....+....5....+....6....+....7....+....8
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00010A 01 INVITE
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00020A R RCD1
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00030A FLD1 10
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00040A FLD2 5
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A</pre>
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<p>The INVITE keyword is in effect only when option indicator
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01 is set on.</p>
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</div>
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</div>
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<div>
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<div class="familylinks">
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<div class="parentlink"><strong>Parent topic:</strong> <a href="rzakemstckeyw.htm" title="These topics contain the keyword entries that you can specify when you define ICF files.">DDS keyword entries for ICF files (positions 45 through 80)</a></div>
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</div>
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</div>
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</body>
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</html>
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