// ----------------------------------------------------------------------------
//
//  Copyright (c) Microsoft Corporation.  All rights reserved.
//
// ----------------------------------------------------------------------------

using System;
using Microsoft.Singularity;
using Microsoft.Singularity.Channels;

namespace Iso9660
{
    //
    //This is a contract between a filesystem service (such as FatService or Iso9660Service)
    //and a worker process that actually implements the filesystem (such as FatFs or Iso9660Fs).
    //
    public contract FileSystemControlContract
    {
        state Start : one {
            Success! -> Ready;
        }
        out message Success();
        
        state Ready : one {
            MountVolume? -> Mounting;
            Stop? -> Stopped;
        }
        in message MountVolume(char[]! in ExHeap device, char[]! in ExHeap mountPoint);
        
        state Mounting : one {
            AckMountVolume! -> Running; 
            NakMountVolume! -> Ready;
        }
        out message AckMountVolume();
        out message NakMountVolume();
        
        state Running : one {
            DismountVolume? -> Dismounting;
        }
        in message DismountVolume(bool force);
        
        state Dismounting : one {
            AckDismountVolume! -> Ready;
            CannotDismount! -> Running;
        }
        out message AckDismountVolume();
        out message CannotDismount();
        
        in message Stop();
        
        state Stopped : one {
        }
    }
}