101 lines
4.4 KiB
HTML
101 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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<meta name="DC.Type" content="reference" />
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<meta name="DC.Title" content="Example: Start a thread in a Pthread program" />
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<meta name="abstract" content="This example shows how to start and pass parameters to a thread in a Pthread program." />
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<meta name="description" content="This example shows how to start and pass parameters to a thread in a Pthread program." />
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<meta name="DC.Relation" scheme="URI" content="rzahwstaco.htm" />
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<meta name="copyright" content="(C) Copyright IBM Corporation 1998, 2006" />
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<meta name="DC.Language" content="en-us" />
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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>Example: Start a thread in a Pthread program</title>
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</head>
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<body id="rzahwe13-e13rx"><a name="rzahwe13-e13rx"><!-- --></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">Example: Start a thread in a Pthread program</h1>
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<div><p>This example shows how to start and pass parameters to a thread
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in a Pthread program.</p>
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<div class="section"><div class="note"><span class="notetitle">Note:</span> By using the code examples, you agree to the terms of the <a href="codedisclaimer.htm">Code license and disclaimer information</a>.</div>
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</div>
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<div class="example"> <pre>/*
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Filename: ATEST11.QCSRC
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The output of this example is as follows:
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Enter Testcase - LIBRARY/ATEST11
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Create/start a thread with parameters
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Wait for the thread to complete
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Thread ID 0000000c, Parameters: 42 is the answer to "Life, the Universe and Everything"
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Main completed
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*/
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#define _MULTI_THREADED
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#include <pthread.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#define checkResults(string, val) { \
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if (val) { \
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printf("Failed with %d at %s", val, string); \
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exit(1); \
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} \
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}
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typedef struct {
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int threadParm1;
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char threadParm2[124];
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} threadParm_t;
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void *theThread(void *parm)
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{
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pthread_id_np_t tid;
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threadParm_t *p = (threadParm_t *)parm;
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tid = pthread_getthreadid_np();
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printf("Thread ID %.8x, Parameters: %d is the answer to \"%s\"\n",
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tid.intId.lo, p->threadParm1, p->threadParm2);
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return NULL;
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}
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int main(int argc, char **argv)
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{
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pthread_t thread;
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int rc=0;
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threadParm_t *threadParm;
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printf("Enter Testcase - %s\n", argv[0]);
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threadParm = (threadParm_t *)malloc(sizeof(threadParm));
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threadParm->threadParm1 = 42;
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strcpy(threadParm->threadParm2, "Life, the Universe and Everything");
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printf("Create/start a thread with parameters\n");
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rc = pthread_create(&thread, NULL, theThread, threadParm);
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checkResults("pthread_create()\n", rc);
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printf("Wait for the thread to complete\n");
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rc = pthread_join(thread, NULL);
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checkResults("pthread_join()\n", rc);
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printf("Main completed\n");
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return 0;
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}</pre>
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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="rzahwstaco.htm" title="When your application creates a new thread, the system initializes a thread object, control structures, and runtime support. These allow the new thread to use language constructs and system services safely.">Start a thread</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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