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// Copyright (c) 2009 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "base/sys_info.h"
#include <sys/sysctl.h>
#include "base/logging.h"
namespace base {
int64 SysInfo::AmountOfPhysicalMemory() {
int pages, page_size;
size_t size = sizeof(pages);
sysctlbyname("vm.stats.vm.v_page_count", &pages, &size, NULL, 0);
sysctlbyname("vm.stats.vm.v_page_size", &page_size, &size, NULL, 0);
if (pages == -1 || page_size == -1) {
return 0;
return static_cast<int64>(pages) * page_size;
// static
size_t SysInfo::MaxSharedMemorySize() {
size_t limit;
size_t size = sizeof(limit);
sysctlbyname("kern.ipc.shmmax", &limit, &size, NULL, 0);
return limit;
} // namespace base
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