author Dão Gottwald <dao@mozilla.com>
Mon, 10 Jan 2011 20:01:47 +0100
changeset 60277 9862560161c4ca70e33517b661e0b05b832bb492
parent 36152 5ffc5409203c649967a622154eb7437eeb10fdd8
child 94475 f4157e8c410708d76703f19e4dfb61859bfe32d8
permissions -rw-r--r--
Bug 623893 - Middle clicking the back / forward buttons doesn't go back / forward. a=dietrich a=b

/* -*- 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 IPC.
 * The Initial Developer of the Original Code is
 *   The Mozilla Foundation
 * Portions created by the Initial Developer are Copyright (C) 2009
 * the Initial Developer. All Rights Reserved.
 * Contributor(s):
 * 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 ***** */

#include <sys/mman.h>         // mprotect
#include <unistd.h>           // sysconf

#include "mozilla/ipc/SharedMemory.h"

namespace mozilla {
namespace ipc {

SharedMemory::SystemProtect(char* aAddr, size_t aSize, int aRights)
  int flags = 0;
  if (aRights & RightsRead)
    flags |= PROT_READ;
  if (aRights & RightsWrite)
    flags |= PROT_WRITE;
  if (RightsNone == aRights)
    flags = PROT_NONE;

  if (0 < mprotect(aAddr, aSize, flags))
    NS_RUNTIMEABORT("can't mprotect()");

  return sysconf(_SC_PAGESIZE);

} // namespace ipc
} // namespace mozilla