#include <stdio.h>
#include <stdlib.h>
#include <synch.h>
#include <thread.h>

sema_t prod_sem, con_sem;

char c;

void *producer( )
{
FILE *fp;
if ((fp=fopen("t.txt", "r")) == NULL)
{
puts("Can not open file.\n");
exit(1);
}
while ((c = getc(fp)) != EOF)
{
sema_post(&con_sem);
sema_wait(&prod_sem);
}
fclose(fp);
c = 'Z';
sema_post(&con_sem);
}

void *consumer()
{
while (c!= 'Z')
{
sema_wait(&con_sem);
printf(" % c ", c);

sema_post(&prod_sem);
}
}



int main()
{
thread_t pro, con;

sema_init(&prod_sem, 0, 0, NULL);
sema_init(&con_sem, 0, 0, NULL);

thr_create(0, 0, producer, 0, 1, 0);
thr_create(0, 0, consumer, 0, 1, 0);

while(thr_join(0, 0, 0) == 0);

return 1;
}