author Daniel Holbert <dholbert@cs.stanford.edu>
Tue, 16 Nov 2010 10:35:59 -0800
changeset 57588 5a5ead36d721620e5ea1fd3c60a61e88350bdf54
parent 56910 ffb9040a013b85de49d83fe36d8b52609932b0b9
child 94475 f4157e8c410708d76703f19e4dfb61859bfe32d8
permissions -rw-r--r--
Bug 610796: In SVG-as-an-image helper-documents, clear rendering observer lists at xpcom shutdown time. r=roc a=blocking-final+

/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*-
 * vim: sw=2 ts=8 et :
/* ***** BEGIN LICENSE BLOCK *****
 * Version: MPL 1.1/GPL 2.0/LGPL 2.1
 * 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:
 * http://www.mozilla.org/MPL/
 * Software distributed under the License is distributed on an "AS IS" basis,
 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
 * for the specific language governing rights and limitations under the
 * License.
 * The Original Code is Mozilla Code.
 * The Initial Developer of the Original Code is
 *   The Mozilla Foundation
 * Portions created by the Initial Developer are Copyright (C) 2010
 * the Initial Developer. All Rights Reserved.
 * Contributor(s):
 *   Chris Jones <jones.chris.g@gmail.com>
 * Alternatively, the contents of this file may be used under the terms of
 * either the GNU General Public License Version 2 or later (the "GPL"), or
 * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
 * in which case the provisions of the GPL or the LGPL are applicable instead
 * of those above. If you wish to allow use of your version of this file only
 * under the terms of either the GPL or the LGPL, and not to allow others to
 * use your version of this file under the terms of the MPL, indicate your
 * decision by deleting the provisions above and replace them with the notice
 * and other provisions required by the GPL or the LGPL. If you do not delete
 * the provisions above, a recipient may use your version of this file under
 * the terms of any one of the MPL, the GPL or the LGPL.
 * ***** END LICENSE BLOCK ***** */

#ifndef mozilla_ipc_SharedMemoryBasic_android_h
#define mozilla_ipc_SharedMemoryBasic_android_h

#include "base/file_descriptor_posix.h"

#include "SharedMemory.h"

// This is a low-level wrapper around platform shared memory.  Don't
// use it directly; use Shmem allocated through IPDL interfaces.

namespace mozilla {
namespace ipc {

class SharedMemoryBasic : public SharedMemory
  typedef base::FileDescriptor Handle;


  SharedMemoryBasic(const Handle& aHandle);

  virtual ~SharedMemoryBasic();

  virtual bool Create(size_t aNbytes);

  virtual bool Map(size_t nBytes);

  virtual void* memory() const
    return mMemory;

  virtual SharedMemoryType Type() const
    return TYPE_BASIC;

  static Handle NULLHandle()
    return Handle();

  static bool IsHandleValid(const Handle &aHandle)
    return aHandle.fd >= 0;

  bool ShareToProcess(base::ProcessHandle aProcess,
                      Handle* aNewHandle);

  void Unmap();
  void Destroy();

  // The /dev/ashmem fd we allocate.
  int mShmFd;
  // Pointer to mapped region, null if unmapped.
  void *mMemory;

} // namespace ipc
} // namespace mozilla

#endif // ifndef mozilla_ipc_SharedMemoryBasic_android_h