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* Copyright 2008 The WebRTC Project Authors. All rights reserved.
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
#if defined(WEBRTC_LINUX)
#include <string>
#include <map>
#include <memory>
#include <vector>
#include "webrtc/base/stream.h"
namespace rtc {
// ConfigParser parses a FileStream of an ".ini."-type format into a map.
// Sample Usage:
// ConfigParser parser;
// ConfigParser::MapVector key_val_pairs;
// if (parser.Open(inifile) && parser.Parse(&key_val_pairs)) {
// for (int section_num=0; i < key_val_pairs.size(); ++section_num) {
// std::string val1 = key_val_pairs[section_num][key1];
// std::string val2 = key_val_pairs[section_num][key2];
// // Do something with valn;
// }
// }
class ConfigParser {
typedef std::map<std::string, std::string> SimpleMap;
typedef std::vector<SimpleMap> MapVector;
virtual ~ConfigParser();
virtual bool Open(const std::string& filename);
virtual void Attach(StreamInterface* stream);
virtual bool Parse(MapVector* key_val_pairs);
virtual bool ParseSection(SimpleMap* key_val_pair);
virtual bool ParseLine(std::string* key, std::string* value);
std::unique_ptr<StreamInterface> instream_;
// ProcCpuInfo reads CPU info from the /proc subsystem on any *NIX platform.
// Sample Usage:
// ProcCpuInfo proc_info;
// int no_of_cpu;
// if (proc_info.LoadFromSystem()) {
// std::string out_str;
// proc_info.GetNumCpus(&no_of_cpu);
// proc_info.GetCpuStringValue(0, "vendor_id", &out_str);
// }
// }
class ProcCpuInfo {
virtual ~ProcCpuInfo();
// Reads the proc subsystem's cpu info into memory. If this fails, this
// returns false; if it succeeds, it returns true.
virtual bool LoadFromSystem();
// Obtains the number of logical CPU threads and places the value num.
virtual bool GetNumCpus(int* num);
// Obtains the number of physical CPU cores and places the value num.
virtual bool GetNumPhysicalCpus(int* num);
// Obtains the CPU family id.
virtual bool GetCpuFamily(int* id);
// Obtains the number of sections in /proc/cpuinfo, which may be greater
// than the number of CPUs (e.g. on ARM)
virtual bool GetSectionCount(size_t* count);
// Looks for the CPU proc item with the given name for the given section
// number and places the string value in result.
virtual bool GetSectionStringValue(size_t section_num, const std::string& key,
std::string* result);
// Looks for the CPU proc item with the given name for the given section
// number and places the int value in result.
virtual bool GetSectionIntValue(size_t section_num, const std::string& key,
int* result);
ConfigParser::MapVector sections_;
// Returns the output of "uname".
std::string ReadLinuxUname();
// Returns the content (int) of
// /sys/devices/system/cpu/cpu0/cpufreq/cpuinfo_max_freq
// Returns -1 on error.
int ReadCpuMaxFreq();
} // namespace rtc
#endif // defined(WEBRTC_LINUX)