scheduler

public class Scheduler{

    private int n_sched;
    //un array di interi dove per ogni indice mi salvo quanto il thread con quell'id ha usato la cpu
    private int[] time;

    public Scheduler(int threads){
        n_sched = threads;
        time = new int[n_sched];
        for(int i=0;i<n_sched;i++)time[i]=0;
    }


    public synchronized void getCPU(int id_t, int time_t){
        System.out.println("id "+id_t+" richiede cpu per un tempo "+time_t);

        //se non esiste, inserisco il valore time_t
        //if(time[id_t]==0)time[id_t]+=time_t;
        //questa riga non mi serve penso

        stampa(); //debug

        while(time[id_t]!=time_min())
            try{ this.wait(); }
            catch (InterruptedException e) { System.out.println("boh"); }

        //aggiorno valore
        time[id_t]+=time_t;

    }

    public synchronized void releaseCPU(){
        notifyAll();
    }

    ///return id del thread che ha usato meno cpu time.
    private int time_min(){
        int min=time[0];
        for(int i=0;i<n_sched;i++)
            if(time[i]<min)
                min=time[i];

        return min;
    }

    private void stampa(){
        for(int i=0;i<n_sched;i++)System.out.print(time[i]+" ");
        System.out.print("\n");
    }

}