35 lines
734 B
C
35 lines
734 B
C
#include <stdio.h>
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#include <unistd.h>
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#include <pthread.h>
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#include "common.h"
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#include "common_threads.h"
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pthread_cond_t c = PTHREAD_COND_INITIALIZER;
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pthread_mutex_t m = PTHREAD_MUTEX_INITIALIZER;
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int done = 0;
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void *child(void *arg) {
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printf("child: begin\n");
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sleep(1);
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done = 1;
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printf("child: signal\n");
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Cond_signal(&c);
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return NULL;
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}
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int main(int argc, char *argv[]) {
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pthread_t p;
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printf("parent: begin\n");
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Pthread_create(&p, NULL, child, NULL);
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Mutex_lock(&m);
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printf("parent: check condition\n");
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while (done == 0) {
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sleep(2);
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printf("parent: wait to be signalled...\n");
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Cond_wait(&c, &m);
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}
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Mutex_unlock(&m);
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printf("parent: end\n");
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return 0;
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}
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