38 lines
1.0 KiB
C
38 lines
1.0 KiB
C
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/* Creates two threads, one printing 10000 "a"s, the other printing
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10000 "b"s.
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Illustrates: thread creation, thread joining. */
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#include <stddef.h>
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#include <stdio.h>
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#include <unistd.h>
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#include "pthread.h"
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static void *process(void * arg)
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{
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int i;
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printf("Starting process %s\n", (char *)arg);
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for (i = 0; i < 10000; i++)
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write(1, (char *) arg, 1);
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return NULL;
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}
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#define sucfail(r) (r != 0 ? "failed" : "succeeded")
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int libc_ex1(void)
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{
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int pret, ret = 0;
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pthread_t th_a, th_b;
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void *retval;
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ret += (pret = pthread_create(&th_a, NULL, process, (void *)"a"));
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printf("create a %s %d\n", sucfail(pret), pret);
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ret += (pret = pthread_create(&th_b, NULL, process, (void *)"b"));
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printf("create b %s %d\n", sucfail(pret), pret);
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ret += (pret = pthread_join(th_a, &retval));
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printf("join a %s %d\n", sucfail(pret), pret);
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ret += (pret = pthread_join(th_b, &retval));
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printf("join b %s %d\n", sucfail(pret), pret);
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return ret;
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}
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#include <finsh.h>
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FINSH_FUNCTION_EXPORT(libc_ex1, example 1 for libc);
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