61 lines
3.7 KiB
HTML
61 lines
3.7 KiB
HTML
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<meta name="DC.Title" content="Thread creation not allowed failure" />
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<meta name="abstract" content="i5/OS does not allow every process on the system to create threads at every time while running." />
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<title>Thread creation not allowed failure</title>
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<body id="rzahwfai-faico"><a name="rzahwfai-faico"><!-- --></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">Thread creation not allowed failure</h1>
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<div><p><span class="keyword">i5/OS™</span> does not
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allow every process on the system to create threads at every time while running.</p>
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<div class="section"><p>You can specify special parameters when you create a job. These
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parameters can indicate that the job should allow multiple threads.</p>
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</div>
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<div class="section"><p>For example, the <span class="apiname">spawn()</span> application
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programming interface (API) has a multithreaded flag that can be specified
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in the inheritance parameter. You can use other ways to submit <span class="keyword">i5/OS</span> jobs
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that allow you to specify that the new job should be allowed to create threads.
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Some job types allow the use of a job description specifying that the job
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that is started using the job description should be allowed to start threads.
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To do this, use the <span class="parmname">Allow Multithread (ALWMLTTHD)</span> parameter
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on the <span class="cmdname">Create Job Description (CRTJOBD)</span> or <span class="cmdname">Change
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Job Description (CHGJOBD)</span> commands.</p>
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</div>
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<div class="section"><p>If you attempt to create a thread in a job that is not capable
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of starting threads, thread creation fails. See your API or language specific
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documentation for details on how the failure is manifested.</p>
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</div>
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<div class="section"><p>The same failure recurs if your application is running the destructors
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for C++ static objects or C/C++ program termination routines. Application
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code cannot create threads when the job is ending.</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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