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

using System;
using Microsoft.Singularity.Channels;
using Microsoft.SingSharp;
using Microsoft.Singularity.Directory;

namespace Microsoft.Singularity.Services.RamDisk.Contracts
{
    /// <summary> The contract between the ramdisk command
    /// line program and the RAM disk client manager
    /// service. </summary>
    public contract RamDiskControlContract : ServiceContract
    {
        in message Create(ulong diskSizeBytes);
        out message CreateSuccess(char []! in ExHeap diskName);
        out message Fail(RamDiskContractErrorCode reason);

        in message Destroy(char []! in ExHeap diskName, bool force);
        out message Success();

        override state Start: one {
            Success! -> Ready;
        }

        state Ready : one {
            Create? -> (CreateSuccess! or Fail!) -> Ready;
            Destroy? -> (Success! or Fail!) -> Ready;
        }

        public const string ManagerControlPath = "/service/services/RamDiskService";
    }
}