ipc/glue/SharedMemory_posix.cpp
author Masayuki Nakano <masayuki@d-toybox.com>
Tue, 18 Mar 2014 13:48:21 +0900
changeset 192606 29757c0fa5915c235efffe343efe37f4edaba923
parent 98529 f4157e8c410708d76703f19e4dfb61859bfe32d8
child 338407 74f12ae5dbc55caabb5bd546c6f12ce1ed282fac
permissions -rw-r--r--
Bug 983049 part.5 Rename nsEventDispatcher to mozilla::EventDispatcher r=smaug

/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*-
 * vim: sw=2 ts=8 et :
 */
/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

#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