34 lines
592 B
C
34 lines
592 B
C
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <pthread.h>
|
|
#include <unistd.h>
|
|
|
|
#include "common.h"
|
|
#include "common_threads.h"
|
|
|
|
#ifdef linux
|
|
#include <semaphore.h>
|
|
#elif __APPLE__
|
|
#include "zemaphore.h"
|
|
#endif
|
|
|
|
sem_t s;
|
|
|
|
void *child(void *arg) {
|
|
sleep(2);
|
|
printf("child\n");
|
|
Sem_post(&s); // signal here: child is done
|
|
return NULL;
|
|
}
|
|
|
|
int main(int argc, char *argv[]) {
|
|
Sem_init(&s, 0);
|
|
printf("parent: begin\n");
|
|
pthread_t c;
|
|
Pthread_create(&c, NULL, child, NULL);
|
|
Sem_wait(&s); // wait here for child
|
|
printf("parent: end\n");
|
|
return 0;
|
|
}
|
|
|