#include <stdio.h>
#include <stdlib.h>
#include <pthread.h>
#include <semaphore.h>
static sem_t mon_sem;
int the_end;
void *thread1(void *arg)
{
while(!the_end)
{
printf("j'attends une place ! \n");
sem_wait(&mon_sem);
printf("je rentre dans le parking ! \n");
sleep(1);
// printf("je sors du parking ! \n");
sem_post(&mon_sem);
}
printf("Parking plein !\n");
pthread_exit(0);
}
void *thread2(void *arg)
{
register int i;
for(i=0; i<5; i++)
{
printf("voiture %d !\n", i);
sem_post(&mon_sem);
sleep(1);
}
the_end = 1;
sem_post (&mon_sem); /*pour débloquer le dernier sem_wait*/
pthread_exit(0);
}
int main(int argc, char **argv)
{
pthread_t th1, th2;
void *ret;
sem_init(&mon_sem, 0, 0);
if(pthread_create(&th1,NULL,thread1,"1") < 0)
{
fprintf(stderr, "erreur thread 1 \n");
exit(1);
}
if(pthread_create(&th2,NULL,thread2,"2") < 0)
{
fprintf(stderr, "erreur thread 2 \n");
exit(1);
}
(void)pthread_join(th1, &ret);
(void)pthread_join(th2, &ret);
return 0;
}