create object based on time in c++

Question

hi, i am writing a simulation about vehicle manufacturing, i am wondering how i can create objects based on time..

i have a base class Vehicle, and children Motorbike, Car, and Truck. 1 Motorbike will be manufactured every 1 hour, 1 car will be manufactured every 3 hours, and 1 truck will be manufactured every 8 hours.

how can i create those objects according to the time indicated?

thanks

Answer 1

One possibility is to have a thread dedicated to each task, that just sits in a loop of lather, rinse,create, sleep, repeat.

Answer 2

You can create timers and wait on those timer events. When the timer expires you can create corresponding object. You can monitor this in a thread.

When will you be destroying these objects?

Answer 3

If you want to have complete control over the timing (say, you can increment the time irrespective of the system timer), then you'll need to implement that as a class. Then provide a Singleton or static function to return the Current time. The time class should be copyable so that objects can remember the starting time. Also, provide a function for advancing time by a certain amount, and for doing time comparisons.

Inside each manufacturable object (or better, the factories that manufacture them), add two functions:

1. StartManufacture. This function should remember the starting time.
2. CheckManufactureComplete. This function fetches the current time, and checks if the required waiting time has elapsed since manufacturing started.