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73 строки
2.7 KiB
Plaintext
73 строки
2.7 KiB
Plaintext
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*-
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* vim: sw=2 ts=8 et :
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*/
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/* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at:
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is Mozilla Code.
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*
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* The Initial Developer of the Original Code is
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* The Mozilla Foundation
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* Portions created by the Initial Developer are Copyright (C) 2010
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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* Chris Jones <jones.chris.g@gmail.com>
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either the GNU General Public License Version 2 or later (the "GPL"), or
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* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the MPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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include protocol PLayers;
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namespace mozilla {
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namespace layers {
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/**
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* PLayer represents a layer shared across thread contexts.
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*/
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sync protocol PLayer {
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manager PLayers;
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/**
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* OWNERSHIP MODEL
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*
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* Roughly speaking, the child side "actually owns" a Layer. This
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* is because the parent side is the "shadow"; when the child
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* releases a Layer, the parent's shadow is no longer meaningful.
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*
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* To implement this model, the concrete PLayerParent keeps a
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* strong ref to its Layer, so the Layer's lifetime is bound to
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* the PLayerParent's. Then, when the Layer's refcount hits 0 on
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* the child side, we send __delete__() from the child to parent.
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* The parent then releases its Layer, which results in the Layer
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* being deleted "soon" (usually immediately).
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*/
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parent:
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__delete__();
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};
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} // layers
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} // mozilla
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