73 lines
2.3 KiB
C
73 lines
2.3 KiB
C
|
/*******************************************************************************
|
||
|
|
* File: startApp.c
|
||
|
|
* Purpose: ice cream teller, basic sequence
|
||
|
|
* 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 j;
|
||
|
|
char string[8];
|
||
|
|
sem_t *access, *coin, *coffee, *ready;
|
||
|
|
pid_t tellerPID;
|
||
|
|
|
||
|
|
sem_unlink(MYTURN_SEMAPHOR); // delete seamphor if it still exists
|
||
|
|
sem_unlink(COIN_SEMAPHOR); // delete seamphor if it still exists
|
||
|
|
sem_unlink(COFFEE_SEMAPHOR); // delete seamphor if it still exists
|
||
|
|
sem_unlink(READY_SEMAPHOR); // delete seamphor if it still exists
|
||
|
|
|
||
|
|
// set up a semaphore (? -> initial value of semaphor)
|
||
|
|
// checkSem() -> macro defined in commonDefs.h
|
||
|
|
|
||
|
|
/*
|
||
|
|
access = sem_open(MYTURN_SEMAPHOR, O_CREAT, 0700, ?); checkSem(access);
|
||
|
|
coin = sem_open(COIN_SEMAPHOR, O_CREAT, 0700, ?); checkSem(coin);
|
||
|
|
coffee = sem_open(COFFEE_SEMAPHOR, O_CREAT, 0700, ?); checkSem(coffee);
|
||
|
|
ready = sem_open(READY_SEMAPHOR, O_CREAT, 0700, ?); checkSem(ready);
|
||
|
|
*/
|
||
|
|
|
||
|
|
// now that the resources are set up, the supervisor can be started
|
||
|
|
for (j = 1; j <= CUSTOMERS; j++) {
|
||
|
|
if (fork() == 0) {
|
||
|
|
sprintf(string, "%d", j);
|
||
|
|
execl("./customer.e", "customer.e", string, NULL);
|
||
|
|
printf("*** could not start customer.e ***\n");
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
if ((tellerPID = fork()) == 0) {
|
||
|
|
execl("./coffeeTeller.e", "coffeeTeller.e", "0", NULL);
|
||
|
|
printf("*** could not start coffeTeller ***\n");
|
||
|
|
}
|
||
|
|
|
||
|
|
waitpid(tellerPID, NULL, 0);
|
||
|
|
system("killall coffeeTeller.e");
|
||
|
|
system("killall customer.e"); // kill all customers
|
||
|
|
|
||
|
|
// clean up resources
|
||
|
|
sem_unlink(MYTURN_SEMAPHOR);
|
||
|
|
sem_unlink(COIN_SEMAPHOR);
|
||
|
|
sem_unlink(COFFEE_SEMAPHOR);
|
||
|
|
sem_unlink(READY_SEMAPHOR);
|
||
|
|
printf("\n");
|
||
|
|
}
|
||
|
|
|
||
|
|
//******************************************************************************
|