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 * Version: MPL 1.1/GPL 2.0/LGPL 2.1
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 * The contents of this file are subject to the Mozilla Public License Version
 * 1.1 (the "License"); you may not use this file except in compliance with
 * the License. You may obtain a copy of the License at:
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 * The Original Code is Mozilla Code.
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 * The Initial Developer of the Original Code is
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 * Portions created by the Initial Developer are Copyright (C) 2010
 * the Initial Developer. All Rights Reserved.
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 * Contributor(s):
 *   Chris Jones <jones.chris.g@gmail.com>
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include protocol PPluginInstance;

namespace mozilla {
namespace plugins {

/**
 * This protocol exists to allow us to correctly destroy background
 * surfaces.  The browser owns the surfaces, but shares a "reference"
 * with the plugin.  The browser needs to notify the plugin when the
 * background is going to be destroyed, but it can't rely on the
 * plugin to destroy it because the plugin may crash at any time.  So
 * the plugin instance relinquishes destruction of the its old
 * background to actors of this protocol, which can deal with crashy
 * corner cases more easily than the instance.
 */
protocol PPluginBackgroundDestroyer {
    manager PPluginInstance;

    // The ctor message for this protocol serves double-duty as
    // notification that that the background is stale.

parent:
    __delete__();

state DESTROYING:
    recv __delete__;
};

}  // namespace plugins
}  // namespace mozilla