47 lines
1.2 KiB
C
47 lines
1.2 KiB
C
/*******************************************************************************
|
|
* File: coffeTeller.c
|
|
* Purpose: simple sequence with semaphores
|
|
* Course: bsy
|
|
* Author: M. Thaler, 2011
|
|
* Revision: 5/2012, 7/2013
|
|
* Version: v.fs20
|
|
*******************************************************************************/
|
|
|
|
#include <stdio.h>
|
|
#include <unistd.h>
|
|
#include <stdlib.h>
|
|
#include <sys/types.h>
|
|
#include <sys/wait.h>
|
|
|
|
#include <sys/mman.h>
|
|
#include <fcntl.h>
|
|
#include <semaphore.h>
|
|
|
|
#include "commonDefs.h"
|
|
|
|
//******************************************************************************
|
|
|
|
int main(void) {
|
|
|
|
int i;
|
|
sem_t *coin, *coffee, *ready;
|
|
|
|
// set up a semaphore
|
|
coin = sem_open(COIN_SEMAPHOR, 0);
|
|
coffee = sem_open(COFFEE_SEMAPHOR, 0);
|
|
ready = sem_open(READY_SEMAPHOR, 0);
|
|
|
|
// start teller machine
|
|
printf("\nCoffee teller machine starting\n\n");
|
|
|
|
i = 0;
|
|
while (i < ITERS) {
|
|
printf("teller (%d): waiting for coin\n", i);
|
|
printf(" (%d): got coin\n", i);
|
|
printf(" (%d): dispense coffee\n", i);
|
|
i++;
|
|
}
|
|
}
|
|
|
|
//******************************************************************************
|