/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*-
 * vim: sw=2 ts=8 et :
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/* ***** 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
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 *
 * 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.
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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) 2009
 * the Initial Developer. All Rights Reserved.
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 * Contributor(s):
 *
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 * 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
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#include <sys/mman.h>         // mprotect
#include <unistd.h>           // sysconf

#include "mozilla/ipc/SharedMemory.h"

namespace mozilla {
namespace ipc {

void
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()");
}

size_t
SharedMemory::SystemPageSize()
{
  return sysconf(_SC_PAGESIZE);
}

} // namespace ipc
} // namespace mozilla