1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/ipc/glue/SharedMemory_posix.cpp Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,38 @@
1.4 +/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*-
1.5 + * vim: sw=2 ts=8 et :
1.6 + */
1.7 +/* This Source Code Form is subject to the terms of the Mozilla Public
1.8 + * License, v. 2.0. If a copy of the MPL was not distributed with this
1.9 + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
1.10 +
1.11 +#include <sys/mman.h> // mprotect
1.12 +#include <unistd.h> // sysconf
1.13 +
1.14 +#include "mozilla/ipc/SharedMemory.h"
1.15 +
1.16 +namespace mozilla {
1.17 +namespace ipc {
1.18 +
1.19 +void
1.20 +SharedMemory::SystemProtect(char* aAddr, size_t aSize, int aRights)
1.21 +{
1.22 + int flags = 0;
1.23 + if (aRights & RightsRead)
1.24 + flags |= PROT_READ;
1.25 + if (aRights & RightsWrite)
1.26 + flags |= PROT_WRITE;
1.27 + if (RightsNone == aRights)
1.28 + flags = PROT_NONE;
1.29 +
1.30 + if (0 < mprotect(aAddr, aSize, flags))
1.31 + NS_RUNTIMEABORT("can't mprotect()");
1.32 +}
1.33 +
1.34 +size_t
1.35 +SharedMemory::SystemPageSize()
1.36 +{
1.37 + return sysconf(_SC_PAGESIZE);
1.38 +}
1.39 +
1.40 +} // namespace ipc
1.41 +} // namespace mozilla
