1// Copyright (c) 2009 The Chromium Authors. All rights reserved.
2// Use of this source code is governed by a BSD-style license that can be
3// found in the LICENSE file.
4
5#include "base/sys_info.h"
6
7#include "base/file_util.h"
8#include "base/logging.h"
9
10namespace base {
11
12int64 SysInfo::AmountOfPhysicalMemory() {
13  long pages = sysconf(_SC_PHYS_PAGES);
14  long page_size = sysconf(_SC_PAGE_SIZE);
15  if (pages == -1 || page_size == -1) {
16    NOTREACHED();
17    return 0;
18  }
19
20  return static_cast<int64>(pages) * page_size;
21}
22
23// static
24size_t SysInfo::MaxSharedMemorySize() {
25  static size_t limit;
26  static bool limit_valid = false;
27  if (!limit_valid) {
28    std::string contents;
29    file_util::ReadFileToString(FilePath("/proc/sys/kernel/shmmax"), &contents);
30    limit = strtoul(contents.c_str(), NULL, 0);
31    limit_valid = true;
32  }
33  return limit;
34}
35
36}  // namespace base
37