void arr_cust()
{
create("arr_cust");
line.reserve(); // join the line and wait to be head
vendingMachineRequested.set(); // i am the front of the line
waitVendingMachineOpen.queue(); // wait for an open machine
vendingMachineRequested.clear(); // vending machine is open and im taking it clear for next in line
vendingMachineIsOpen.set(); // tell vending machine that i am about to use it.
line.release(); // i am not the head of the line anymore pass it to next in line.
doneWithMachine.wait(); // I am done after time to use machine is free and im leaving and dying.
// set up shuttle process
}
