michael@0: /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*-
michael@0:  * vim: sw=2 ts=8 et :
michael@0:  */
michael@0: /* This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0:  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: 
michael@0: #include <sys/mman.h>         // mprotect
michael@0: #include <unistd.h>           // sysconf
michael@0: 
michael@0: #include "mozilla/ipc/SharedMemory.h"
michael@0: 
michael@0: namespace mozilla {
michael@0: namespace ipc {
michael@0: 
michael@0: void
michael@0: SharedMemory::SystemProtect(char* aAddr, size_t aSize, int aRights)
michael@0: {
michael@0:   int flags = 0;
michael@0:   if (aRights & RightsRead)
michael@0:     flags |= PROT_READ;
michael@0:   if (aRights & RightsWrite)
michael@0:     flags |= PROT_WRITE;
michael@0:   if (RightsNone == aRights)
michael@0:     flags = PROT_NONE;
michael@0: 
michael@0:   if (0 < mprotect(aAddr, aSize, flags))
michael@0:     NS_RUNTIMEABORT("can't mprotect()");
michael@0: }
michael@0: 
michael@0: size_t
michael@0: SharedMemory::SystemPageSize()
michael@0: {
michael@0:   return sysconf(_SC_PAGESIZE);
michael@0: }
michael@0: 
michael@0: } // namespace ipc
michael@0: } // namespace mozilla