66 lines
4.1 KiB
HTML
66 lines
4.1 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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<meta name="DC.Title" content="Activation group ending" />
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<meta name="abstract" content="The i5/OS Integrated Language Environment (ILE) program model uses activation groups as a way to encapsulate resources for an application program within a job." />
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<title>Activation group ending</title>
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</head>
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<body id="rzahwter-terco"><a name="rzahwter-terco"><!-- --></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">Activation group ending</h1>
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<div><p>The <span class="keyword">i5/OS™</span> Integrated
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Language Environment<sup>®</sup> (ILE) program model uses activation groups as a
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way to encapsulate resources for an application program within a job.</p>
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<div class="section"><p>When multiple threads exist in the processes that possibly use
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the activation group, the system cannot end that activation group in a predictable
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and safe way. To solve this problem, the system changes the behavior of ending
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an activation group in a multithreaded job.</p>
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</div>
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<div class="section"><p>If a secondary thread in a multithreaded
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application performs an action that ends an activation group (for example,
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C functions exit() or abort()) or fails to prevent an activation group from
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ending, the system takes action to end the process at that time. If the initial
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thread in an multithreaded application performs an action that ends an activation
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group or fails to prevent an activation group from ending, the system ends
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the activation group but does not end the process.</p>
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</div>
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<div class="section"><p>A typical example of this occurs when a current <span class="keyword">i5/OS</span> application
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is altered to take advantage of multithreading. The current <span class="keyword">i5/OS</span> application
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probably uses multiple program objects. Unlike other platforms, <span class="keyword">i5/OS</span> allows
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you to call the programs within the same process context as the currently
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running application code.</p>
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</div>
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<div class="section"><p>The default activation group attribute for a program is *NEW.
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Calling a program with a default activation of *NEW in a multithreaded job
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ends both the activation group and the process when the program ends. If
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the job is to remain active after the program ends, the program should be
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changed to use the *DEFAULT or a named activation group.</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="rzahwcomco.htm" title="Several programming errors often occur when writing multithreaded applications.">Common multithreaded programming errors</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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