292 lines
8.1 KiB
HTML
292 lines
8.1 KiB
HTML
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<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
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<html>
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<head>
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<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
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<meta name="Copyright" content="Copyright (c) 2006 by IBM Corporation">
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<title>Create Handle (QRZCRTH) API</title>
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<!-- Begin Header Records ========================================== -->
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<!-- All rights reserved. Licensed Materials Property of IBM -->
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<!-- US Government Users Restricted Rights -->
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<!-- Use, duplication or disclosure restricted by -->
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<!-- GSA ADP Schedule Contract with IBM Corp. -->
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<!-- GSA ADP Schedule Contract with IBM Corp. -->
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<!-- Change History: -->
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<!-- YYMMDD USERID Change description -->
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<!-- This file has undergone html cleanup on 1/14/02 by JET -->
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<!-- End Header Records -->
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<link rel="stylesheet" type="text/css" href="../rzahg/ic.css">
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</head>
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<body>
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<a name="Top_Of_Page"></a>
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<!-- Java sync-link-->
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<script type="text/javascript" language="Javascript" src="../rzahg/synch.js">
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</script>
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<h2>Create Handle (QRZCRTH) API</h2>
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<div class="box" style="width: 80%;">
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<br>
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Required Parameter Group:<br>
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<!-- iddvc RMBR -->
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<br>
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<table width="100%">
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<tr>
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<td align="center" valign="top" width="10%">1</td>
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<td align="left" valign="top" width="50%">Receiver variable</td>
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<td align="left" valign="top" width="20%">Output</td>
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<td align="left" valign="top" width="20%">Char(*)</td>
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</tr>
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<tr>
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<td align="center" valign="top">2</td>
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<td align="left" valign="top">Length of receiver variable</td>
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<td align="left" valign="top">Input</td>
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<td align="left" valign="top">Binary(4)</td>
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</tr>
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<tr>
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<td align="center" valign="top">3</td>
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<td align="left" valign="top">Format name</td>
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<td align="left" valign="top">Input</td>
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<td align="left" valign="top">Char(8)</td>
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</tr>
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<tr>
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<td align="center" valign="top">4</td>
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<td align="left" valign="top">Error code</td>
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<td align="left" valign="top">I/O</td>
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<td align="left" valign="top">Char(*)</td>
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</tr>
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</table>
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<br>
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Default Public Authority: *EXCLUDE<br>
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<!-- iddvc RMBR -->
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<br>
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Threadsafe: No<br>
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<br>
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</div>
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<p>The Create Handle (QRZCRTH) API creates a handle that is used as a
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placeholder when possible list items are involved. Use this API to create a
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handle before calling a hardware resource API that has a handle parameter
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defined.</p>
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<ul>
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<li><strong>Handle supplied to an API.</strong> The handle allows repeated
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calls to obtain more than one list item. While retrieving possible list items,
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a handle should be supplied when a first call attempt is used that is followed
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by subsequent (next) call attempts.<br>
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<br>
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</li>
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<li><strong>Handle not supplied to an API.</strong> While retrieving
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information, if an attempt is made only for the first call, a handle may be set
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to hexadecimal 0. If a subsequent (next) call is attempted by an API to
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retrieve information, the API is unable to determine if more information meets
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the supplied criteria unless the initial call is repeated through the use of a
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handle.</li>
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</ul>
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<p><strong>Note:</strong> The repeated API calls must have the same criteria
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and must involve the same API. Handles cannot be shared across different APIs
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or within the same API with different criteria.</p>
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<p>You are required to delete any handles created by the Create Handle
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(QRZCRTH) API. See <a href="qrzdlth.htm">Delete Handle (QRZDLTH) API</a> for
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more information.</p>
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<br>
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<h3>Authorities and Locks</h3>
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<dl>
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<dt><em>API Public Authority</em></dt>
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<dd>*EXCLUDE</dd>
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</dl>
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<br>
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<h3>Required Parameter Group</h3>
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<dl>
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<dt><strong>Receiver variable</strong></dt>
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<dd>OUTPUT; CHAR(*)
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<p> The receiver variable that receives the information requested. You can
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specify the size of the area to be smaller than the format requested as long as
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you specify the length parameter correctly. As a result, the API returns only
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the data that the area can hold.</p>
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</dd>
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<dt><strong>Length of receiver variable</strong></dt>
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<dd>INPUT; BINARY(4)
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<p> The length of the receiver variable provided. The length of receiver
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variable parameter may be specified up to the size of the receiver variable
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specified in the user program. If the length of receiver variable parameter
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specified is larger than the allocated size of the receiver variable specified
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in the user program, the results are not predictable. The minimum length is 8
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bytes.</p>
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</dd>
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<dt><strong>Format name</strong></dt>
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<dd>INPUT; CHAR(8)
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<p> The content and format of the information returned. The possible format
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name is as follows:</p>
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<table cellpadding="5">
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<!-- cols="15 85" -->
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<tr>
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<td align="left" valign="top"><em>HNDL0100</em></td>
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<td align="left" valign="top">A handle that is 16 bytes in length is returned.
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See <a href="#HDRCRTP100">HNDL0100 Format</a> for details of this format.</td>
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</tr>
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</table>
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<br>
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</dd>
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<dt><strong>Error code</strong></dt>
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<dd>I/O; CHAR(*)
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<p> The structure in which to return error information. For the format of the
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structure, see <a href="../apiref/error.htm#hdrerrcod">Error code parameter</a>.</p>
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</dd>
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</dl>
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<br>
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<h3><a name="HDRCRTP100">HNDL0100 Format</a></h3>
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<table border width="80%">
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<tr>
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<th align="center" valign="bottom" colspan="2">Offset</th>
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<th align="left" valign="bottom" rowspan="2">Type</th>
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<th align="left" valign="bottom" rowspan="2">Field</th>
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</tr>
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<tr>
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<th align="center" valign="bottom">Dec</th>
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<th align="center" valign="bottom">Hex</th>
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</tr>
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<tr>
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<td align="center" valign="top" width="10%">0</td>
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<td align="center" valign="top" width="10%">0</td>
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<td align="left" valign="top" width="20%">BINARY(4)</td>
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<td align="left" valign="top" width="60%">Bytes returned</td>
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</tr>
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<tr>
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<td align="center" valign="top">4</td>
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<td align="center" valign="top">4</td>
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<td align="left" valign="top">BINARY(4)</td>
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<td align="left" valign="top">Bytes available</td>
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</tr>
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<tr>
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<td align="center" valign="top">8</td>
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<td align="center" valign="top">8</td>
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<td align="left" valign="top">CHAR(16)</td>
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<td align="left" valign="top">Handle</td>
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</tr>
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</table>
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<br>
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<br>
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<h3><a name="HDRCRTPFD">Field Descriptions</a></h3>
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<p><strong>Bytes available.</strong> The number of bytes of data available to
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be returned. All available data is returned if enough space is provided.</p>
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<p><strong>Bytes returned.</strong> The number of bytes of data returned.</p>
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<p><strong>Handle.</strong> The returned handle value to be used on subsequent
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API calls when a handle parameter is required.</p>
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<br>
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<h3>Error Messages</h3>
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<table width="100%" cellpadding="5">
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<!-- cols="15 85" -->
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<tr>
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<th align="left" valign="top" nowrap>Message ID</th>
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<th align="left" valign="top">Error Message Text</th>
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</tr>
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<tr>
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<td align="left" valign="top">CPF0B31 E</td>
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<td align="left" valign="top">A handle failed to create.</td>
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</tr>
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<tr>
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<td align="left" valign="top">CPF24B4 E</td>
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<td align="left" valign="top">Severe error while addressing parameter
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list.</td>
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</tr>
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<tr>
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<td align="left" valign="top">CPF3CF1 E</td>
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<td align="left" valign="top">Error code parameter not valid.</td>
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</tr>
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<tr>
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<td align="left" valign="top">CPF3C19 E</td>
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<td align="left" valign="top">Error occurred with receiver variable
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specified.</td>
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</tr>
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<tr>
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<td align="left" valign="top">CPF3C21 E</td>
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<td align="left" valign="top">Format name &1 is not valid.</td>
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</tr>
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<tr>
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<td align="left" valign="top">CPF3C24 E</td>
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<td align="left" valign="top">Length of the receiver variable is not
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valid.</td>
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</tr>
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<tr>
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<td align="left" valign="top">CPF3C90 E</td>
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<td align="left" valign="top">Literal value cannot be changed.</td>
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</tr>
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<tr>
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<td align="left" valign="top">CPF9872 E</td>
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<td align="left" valign="top">Program or service program &1 in library
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&2 ended. Reason code &3.</td>
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</tr>
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</table>
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<br>
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<hr>
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API introduced: V3R6
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<hr>
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<table align="center" cellpadding="2" cellspacing="2">
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<tr align="center">
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<td valign="middle" align="center"><a href="#Top_Of_Page">Top</a> | <a href=
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"config.htm">Configuration APIs</a> | <a href="aplist.htm">API by
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category</a></td>
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</tr>
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</table>
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</body>
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</html>
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