///////////////////////////////////////////////////////////////////////////////
//
//  Microsoft Research Singularity
//
//  Copyright (c) Microsoft Corporation.  All rights reserved.
//
//  File:   NicDeviceEventContract.sg
//

namespace Microsoft.Singularity.Io.Net
{
    using System;
    using System.Runtime.InteropServices;
    using Microsoft.SingSharp;
    using Microsoft.Singularity;
    using Microsoft.Singularity.Channels;
    using Microsoft.Singularity.Io;

    public enum NicEventType : uint
    {
        NoEvent       = 0,
        ReceiveEvent  = 1u << 0,
        TransmitEvent = 1u << 1,
        LinkEvent     = 1u << 2,
    }

    public contract NicDeviceEventContract
    {
        out message Success();

        out message NicDeviceEvent(NicEventType eventType);
        in  message AckNicDeviceEvent();

        state READY : one
        {
            Success! -> RUNNING;
        }

        state RUNNING : one
        {
            NicDeviceEvent! -> AckNicDeviceEvent? -> RUNNING;
        }
    }
}