///////////////////////////////////////////////////////////////////////////////
//
//  Microsoft Research Singularity
//
//  Copyright (c) Microsoft Corporation.  All rights reserved.
//
//  File:   StressContract.sg
//  Note:   Contract definition for the stress diagnostics
//

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

namespace Microsoft.Singularity.Stress.Contracts
{
    public rep struct ArgList : ITracked
    {
        public char[] in ExHeap arg;
        public ArgList* in ExHeap next;

        public ArgList([Claims] char[] in ExHeap arg, [Claims] ArgList* in ExHeap next)
        {
            this.arg = arg;
            this.next = next;
        }
    }

    public contract StressContract : ServiceContract
    {
        // The name you should use to look up this module using the NameServer.
        public const string ModuleName = "/stress";

        // Signal our identity
        out message Ready();

        // Send printable results back to client during a stress test
        out message Print(char* opt(ExHeap[]) s);
        in message AckPrint();

        // Stress the garbage collector, send printable results
        in message GcStress();
        out message GcStressDone();

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

        state ReadyState : one
        {
            // GcStress? -> (Print! -> AckPrint?)* -> GcStressDone! -> ReadyState;
            GcStress? -> GcStressState;
        }

        state GcStressState : one
        {
            Print! -> AckPrint? -> GcStressState;
            GcStressDone! -> ReadyState;
        }
    }
}