36 lines
946 B
Plaintext
36 lines
946 B
Plaintext
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////////////////////////////////////////////////////////////////////////////////
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//
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// Microsoft Research Singularity
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//
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// Copyright (c) Microsoft Corporation. All rights reserved.
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//
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// File: ExtensionContract.sg
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//
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// This is the base contract to be used, and overridden by, every
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// system extension loaded as a child process.
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using Microsoft.Singularity.Directory;
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namespace Microsoft.Singularity.Extending
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{
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public contract ExtensionContract : ServiceContract
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{
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in message Shutdown(); // Shutdown the extension gracefully.
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out message AckShutdown();
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out message NakShutdown();
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out message Success();
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override state Start: one {
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Success! -> Ready;
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}
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state Ready: one
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{
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Shutdown? -> (AckShutdown! or NakShutdown!) -> Ready;
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// AckShutdown should really go to done.
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}
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}
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}
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