////////////////////////////////////////////////////////////////////////////////
//
//  Microsoft Research Singularity
//
//  Copyright (c) Microsoft Corporation.  All rights reserved.
//
//  File:   CHello.cs
//
//  Note:   Simple Singularity test program.
//
using System;
using System.Runtime.CompilerServices;
using System.Threading;

using Microsoft.Singularity;
using Microsoft.Singularity.Directory;
using Microsoft.Singularity.V1.Services;
using Microsoft.Singularity.Io;

namespace Microsoft.Singularity.Applications
{
    public class CHello
    {

        public static ServiceContract.Imp OpenDevice(String! devname)
        {
            ServiceContract.Exp! exp;
            ServiceContract.Imp! imp;
            ServiceContract.NewChannel(out imp, out exp);

            // get NS endpoint
            DirectoryServiceContract.Imp ns = DirectoryService.NewClientEndpoint();

            bool success = false;
            ns.SendBind(Bitter.FromString2(devname),exp);
            switch receive
            {
                case ns.AckBind():
                    Console.WriteLine("Received AckBind from namespace.");
                    success = true;
                    break;
                case ns.NakBind(rejected, error):
                    delete rejected;
                    Console.WriteLine("Received NakLookup from namespace.");
                    break;
                case ns.ChannelClosed():
                    Console.WriteLine("Channel closed to nameserver.");
                    break;
            }

            if (!success)
            {
                Console.WriteLine("Bind of {0} failed\n", devname);
                delete imp;
                delete ns;
                return null;
            }

            delete ns;
            return imp;
        }

        public static int Main(String[] args)
        {
            Console.WriteLine("Hello World!");

            ServiceContract.Imp device = OpenDevice("/dev/disk0");
            if (device == null) {
                Console.WriteLine("Couldn't open disk0");
                return 1;
            }
            delete device;
            Console.WriteLine("Opened disk0");
            return 0;
        }
    }
}