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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* 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
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