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36 lines
972 B
C
36 lines
972 B
C
/* 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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void * process(void * arg)
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{
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int i;
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fprintf(stderr, "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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}
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return NULL;
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}
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int main(void)
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{
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int retcode;
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pthread_t th_a, th_b;
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void * retval;
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retcode = pthread_create(&th_a, NULL, process, (void *) "a");
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if (retcode != 0) fprintf(stderr, "create a failed %d\n", retcode);
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retcode = pthread_create(&th_b, NULL, process, (void *) "b");
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if (retcode != 0) fprintf(stderr, "create b failed %d\n", retcode);
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retcode = pthread_join(th_a, &retval);
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if (retcode != 0) fprintf(stderr, "join a failed %d\n", retcode);
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retcode = pthread_join(th_b, &retval);
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if (retcode != 0) fprintf(stderr, "join b failed %d\n", retcode);
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return 0;
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}
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