62 lines
3.8 KiB
HTML
62 lines
3.8 KiB
HTML
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<meta name="DC.Type" content="reference" />
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<meta name="DC.Title" content="Mixing thread models" />
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<meta name="abstract" content="Do not mix Pthreads APIs with other thread management APIs that might be provided by the system." />
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<title>Mixing thread models</title>
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</head>
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<body id="rzahwmix-mixco"><a name="rzahwmix-mixco"><!-- --></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">Mixing thread models</h1>
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<div><p>Do not mix Pthreads APIs with
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other thread management APIs that might be provided by the system.</p>
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<div class="section"><p>For example, you should not use Java™ or the IBM<sup>®</sup> Open Class libraries threads implementations
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in the same thread or process as Pthreads. More importantly, do not attempt
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to manipulate a thread from one threads implementation with the API of another.
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Unpredictable results might occur.</p>
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</div>
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<div class="section"><p>For example, you can manipulate the priority of a
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thread by using Pthread interfaces and non-Pthread interfaces. If you do so,
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the priority is always set correctly. However, the priority returned from
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the Pthread interface <span class="apiname">pthread_getschedparam()</span> is correct
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only if setting the priority was always done using either the <span class="apiname">pthread_setschedparam()</span> interface
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or some other interface, but not both. If you instead use multiple interfaces
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to set the priority of the thread, <span class="apiname">pthread_getschedparam()</span> always
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returns the priority that was set by the last use of the <span class="apiname">pthread_setschedparam()</span> interface.</p>
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</div>
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<div class="section"><p>Similarly, you can end a Java thread
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using the <span class="apiname">pthread_exit()</span> API if you are running application
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code in a native method. However, using <span class="apiname">pthread_exit()</span> to
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end the Java thread can have unexpected repercussions. These
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can include bypassing some of the Java environment thread processing or perhaps
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ending the Java thread in a way that your Java application
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does not expect and cannot handle.</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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