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83 lines
2.7 KiB
C++
83 lines
2.7 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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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.org code.
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*
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* The Initial Developer of the Original Code is
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* Mozilla Foundation.
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* Portions created by the Initial Developer are Copyright (C) 2009
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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* Jim Mathies <jmathies@mozilla.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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#ifndef gfx_SharedDIB_h__
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#define gfx_SharedDIB_h__
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#include "base/shared_memory.h"
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#include "prtypes.h"
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#include "nscore.h"
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namespace mozilla {
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namespace gfx {
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class SharedDIB
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{
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public:
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typedef base::SharedMemoryHandle Handle;
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public:
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SharedDIB();
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~SharedDIB();
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// Create and allocate a new shared dib.
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nsresult Create(PRUint32 aSize);
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// Destroy or release resources associated with this dib.
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nsresult Close();
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// Returns true if this object contains a valid dib.
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bool IsValid();
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// Wrap a new shared dib around allocated shared memory. Note aHandle must point
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// to a memory section large enough to hold a dib of size aSize, otherwise this
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// will fail.
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nsresult Attach(Handle aHandle, PRUint32 aSize);
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// Returns a SharedMemoryHandle suitable for sharing with another process.
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nsresult ShareToProcess(base::ProcessHandle aChildProcess, Handle *aChildHandle);
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protected:
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base::SharedMemory *mShMem;
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};
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} // gfx
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} // mozilla
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#endif
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