1/*
2 *  Copyright 2008 The WebRTC Project Authors. All rights reserved.
3 *
4 *  Use of this source code is governed by a BSD-style license
5 *  that can be found in the LICENSE file in the root of the source
6 *  tree. An additional intellectual property rights grant can be found
7 *  in the file PATENTS.  All contributing project authors may
8 *  be found in the AUTHORS file in the root of the source tree.
9 */
10
11#ifndef WEBRTC_BASE_LINUX_H_
12#define WEBRTC_BASE_LINUX_H_
13
14#if defined(WEBRTC_LINUX)
15#include <string>
16#include <map>
17#include <vector>
18
19#include "webrtc/base/scoped_ptr.h"
20#include "webrtc/base/stream.h"
21
22namespace rtc {
23
24//////////////////////////////////////////////////////////////////////////////
25// ConfigParser parses a FileStream of an ".ini."-type format into a map.
26//////////////////////////////////////////////////////////////////////////////
27
28// Sample Usage:
29//   ConfigParser parser;
30//   ConfigParser::MapVector key_val_pairs;
31//   if (parser.Open(inifile) && parser.Parse(&key_val_pairs)) {
32//     for (int section_num=0; i < key_val_pairs.size(); ++section_num) {
33//       std::string val1 = key_val_pairs[section_num][key1];
34//       std::string val2 = key_val_pairs[section_num][key2];
35//       // Do something with valn;
36//     }
37//   }
38
39class ConfigParser {
40 public:
41  typedef std::map<std::string, std::string> SimpleMap;
42  typedef std::vector<SimpleMap> MapVector;
43
44  ConfigParser();
45  virtual ~ConfigParser();
46
47  virtual bool Open(const std::string& filename);
48  virtual void Attach(StreamInterface* stream);
49  virtual bool Parse(MapVector* key_val_pairs);
50  virtual bool ParseSection(SimpleMap* key_val_pair);
51  virtual bool ParseLine(std::string* key, std::string* value);
52
53 private:
54  scoped_ptr<StreamInterface> instream_;
55};
56
57//////////////////////////////////////////////////////////////////////////////
58// ProcCpuInfo reads CPU info from the /proc subsystem on any *NIX platform.
59//////////////////////////////////////////////////////////////////////////////
60
61// Sample Usage:
62//   ProcCpuInfo proc_info;
63//   int no_of_cpu;
64//   if (proc_info.LoadFromSystem()) {
65//      std::string out_str;
66//      proc_info.GetNumCpus(&no_of_cpu);
67//      proc_info.GetCpuStringValue(0, "vendor_id", &out_str);
68//      }
69//   }
70
71class ProcCpuInfo {
72 public:
73  ProcCpuInfo();
74  virtual ~ProcCpuInfo();
75
76  // Reads the proc subsystem's cpu info into memory. If this fails, this
77  // returns false; if it succeeds, it returns true.
78  virtual bool LoadFromSystem();
79
80  // Obtains the number of logical CPU threads and places the value num.
81  virtual bool GetNumCpus(int* num);
82
83  // Obtains the number of physical CPU cores and places the value num.
84  virtual bool GetNumPhysicalCpus(int* num);
85
86  // Obtains the CPU family id.
87  virtual bool GetCpuFamily(int* id);
88
89  // Obtains the number of sections in /proc/cpuinfo, which may be greater
90  // than the number of CPUs (e.g. on ARM)
91  virtual bool GetSectionCount(size_t* count);
92
93  // Looks for the CPU proc item with the given name for the given section
94  // number and places the string value in result.
95  virtual bool GetSectionStringValue(size_t section_num, const std::string& key,
96                                     std::string* result);
97
98  // Looks for the CPU proc item with the given name for the given section
99  // number and places the int value in result.
100  virtual bool GetSectionIntValue(size_t section_num, const std::string& key,
101                                  int* result);
102
103 private:
104  ConfigParser::MapVector sections_;
105};
106
107#if !defined(WEBRTC_CHROMIUM_BUILD)
108// Builds a string containing the info from lsb_release on a single line.
109std::string ReadLinuxLsbRelease();
110#endif
111
112// Returns the output of "uname".
113std::string ReadLinuxUname();
114
115// Returns the content (int) of
116// /sys/devices/system/cpu/cpu0/cpufreq/cpuinfo_max_freq
117// Returns -1 on error.
118int ReadCpuMaxFreq();
119
120}  // namespace rtc
121
122#endif  // defined(WEBRTC_LINUX)
123#endif  // WEBRTC_BASE_LINUX_H_
124