1 files changed, 348 insertions, 0 deletions
diff --git a/chromium/third_party/webrtc/base/linux.cc b/chromium/third_party/webrtc/base/linux.cc
new file mode 100644
index 00000000000..b958543532e
--- /dev/null
+++ b/chromium/third_party/webrtc/base/linux.cc
@@ -0,0 +1,348 @@
+/*
+ *  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 "webrtc/base/linux.h"
+
+#include <ctype.h>
+
+#include <errno.h>
+#include <sys/utsname.h>
+#include <sys/wait.h>
+
+#include <cstdio>
+#include <set>
+
+#include "webrtc/base/stringencode.h"
+
+namespace rtc {
+
+static const char kCpuInfoFile[] = "/proc/cpuinfo";
+static const char kCpuMaxFreqFile[] =
+    "/sys/devices/system/cpu/cpu0/cpufreq/cpuinfo_max_freq";
+
+ProcCpuInfo::ProcCpuInfo() {
+}
+
+ProcCpuInfo::~ProcCpuInfo() {
+}
+
+bool ProcCpuInfo::LoadFromSystem() {
+  ConfigParser procfs;
+  if (!procfs.Open(kCpuInfoFile)) {
+    return false;
+  }
+  return procfs.Parse(&sections_);
+};
+
+bool ProcCpuInfo::GetSectionCount(size_t* count) {
+  if (sections_.empty()) {
+    return false;
+  }
+  if (count) {
+    *count = sections_.size();
+  }
+  return true;
+}
+
+bool ProcCpuInfo::GetNumCpus(int* num) {
+  if (sections_.empty()) {
+    return false;
+  }
+  int total_cpus = 0;
+#if defined(__arm__)
+  // Count the number of blocks that have a "processor" key defined. On ARM,
+  // there may be extra blocks of information that aren't per-processor.
+  size_t section_count = sections_.size();
+  for (size_t i = 0; i < section_count; ++i) {
+    int processor_id;
+    if (GetSectionIntValue(i, "processor", &processor_id)) {
+      ++total_cpus;
+    }
+  }
+  // Single core ARM systems don't include "processor" keys at all, so return
+  // that we have a single core if we didn't find any explicitly above.
+  if (total_cpus == 0) {
+    total_cpus = 1;
+  }
+#else
+  // On X86, there is exactly one info section per processor.
+  total_cpus = static_cast<int>(sections_.size());
+#endif
+  if (num) {
+    *num = total_cpus;
+  }
+  return true;
+}
+
+bool ProcCpuInfo::GetNumPhysicalCpus(int* num) {
+  if (sections_.empty()) {
+    return false;
+  }
+  // TODO: /proc/cpuinfo only reports cores that are currently
+  // _online_, so this may underreport the number of physical cores.
+#if defined(__arm__)
+  // ARM (currently) has no hyperthreading, so just return the same value
+  // as GetNumCpus.
+  return GetNumCpus(num);
+#else
+  int total_cores = 0;
+  std::set<int> physical_ids;
+  size_t section_count = sections_.size();
+  for (size_t i = 0; i < section_count; ++i) {
+    int physical_id;
+    int cores;
+    // Count the cores for the physical id only if we have not counted the id.
+    if (GetSectionIntValue(i, "physical id", &physical_id) &&
+        GetSectionIntValue(i, "cpu cores", &cores) &&
+        physical_ids.find(physical_id) == physical_ids.end()) {
+      physical_ids.insert(physical_id);
+      total_cores += cores;
+    }
+  }
+
+  if (num) {
+    *num = total_cores;
+  }
+  return true;
+#endif
+}
+
+bool ProcCpuInfo::GetCpuFamily(int* id) {
+  int cpu_family = 0;
+
+#if defined(__arm__)
+  // On some ARM platforms, there is no 'cpu family' in '/proc/cpuinfo'. But
+  // there is 'CPU Architecture' which can be used as 'cpu family'.
+  // See http://en.wikipedia.org/wiki/ARM_architecture for a good list of
+  // ARM cpu families, architectures, and their mappings.
+  // There may be multiple sessions that aren't per-processor. We need to scan
+  // through each session until we find the first 'CPU architecture'.
+  size_t section_count = sections_.size();
+  for (size_t i = 0; i < section_count; ++i) {
+    if (GetSectionIntValue(i, "CPU architecture", &cpu_family)) {
+      // We returns the first one (if there are multiple entries).
+      break;
+    };
+  }
+#else
+  GetSectionIntValue(0, "cpu family", &cpu_family);
+#endif
+  if (id) {
+    *id = cpu_family;
+  }
+  return true;
+}
+
+bool ProcCpuInfo::GetSectionStringValue(size_t section_num,
+                                        const std::string& key,
+                                        std::string* result) {
+  if (section_num >= sections_.size()) {
+    return false;
+  }
+  ConfigParser::SimpleMap::iterator iter = sections_[section_num].find(key);
+  if (iter == sections_[section_num].end()) {
+    return false;
+  }
+  *result = iter->second;
+  return true;
+}
+
+bool ProcCpuInfo::GetSectionIntValue(size_t section_num,
+                                     const std::string& key,
+                                     int* result) {
+  if (section_num >= sections_.size()) {
+    return false;
+  }
+  ConfigParser::SimpleMap::iterator iter = sections_[section_num].find(key);
+  if (iter == sections_[section_num].end()) {
+    return false;
+  }
+  return FromString(iter->second, result);
+}
+
+ConfigParser::ConfigParser() {}
+
+ConfigParser::~ConfigParser() {}
+
+bool ConfigParser::Open(const std::string& filename) {
+  FileStream* fs = new FileStream();
+  if (!fs->Open(filename, "r", NULL)) {
+    return false;
+  }
+  instream_.reset(fs);
+  return true;
+}
+
+void ConfigParser::Attach(StreamInterface* stream) {
+  instream_.reset(stream);
+}
+
+bool ConfigParser::Parse(MapVector* key_val_pairs) {
+  // Parses the file and places the found key-value pairs into key_val_pairs.
+  SimpleMap section;
+  while (ParseSection(&section)) {
+    key_val_pairs->push_back(section);
+    section.clear();
+  }
+  return (!key_val_pairs->empty());
+}
+
+bool ConfigParser::ParseSection(SimpleMap* key_val_pair) {
+  // Parses the next section in the filestream and places the found key-value
+  // pairs into key_val_pair.
+  std::string key, value;
+  while (ParseLine(&key, &value)) {
+    (*key_val_pair)[key] = value;
+  }
+  return (!key_val_pair->empty());
+}
+
+bool ConfigParser::ParseLine(std::string* key, std::string* value) {
+  // Parses the next line in the filestream and places the found key-value
+  // pair into key and val.
+  std::string line;
+  if ((instream_->ReadLine(&line)) == SR_EOS) {
+    return false;
+  }
+  std::vector<std::string> tokens;
+  if (2 != split(line, ':', &tokens)) {
+    return false;
+  }
+  // Removes whitespace at the end of Key name
+  size_t pos = tokens[0].length() - 1;
+  while ((pos > 0) && isspace(tokens[0][pos])) {
+    pos--;
+  }
+  tokens[0].erase(pos + 1);
+  // Removes whitespace at the start of value
+  pos = 0;
+  while (pos < tokens[1].length() && isspace(tokens[1][pos])) {
+    pos++;
+  }
+  tokens[1].erase(0, pos);
+  *key = tokens[0];
+  *value = tokens[1];
+  return true;
+}
+
+#if !defined(WEBRTC_CHROMIUM_BUILDs)
+static bool ExpectLineFromStream(FileStream* stream,
+                                 std::string* out) {
+  StreamResult res = stream->ReadLine(out);
+  if (res != SR_SUCCESS) {
+    if (res != SR_EOS) {
+      LOG(LS_ERROR) << "Error when reading from stream";
+    } else {
+      LOG(LS_ERROR) << "Incorrect number of lines in stream";
+    }
+    return false;
+  }
+  return true;
+}
+
+static void ExpectEofFromStream(FileStream* stream) {
+  std::string unused;
+  StreamResult res = stream->ReadLine(&unused);
+  if (res == SR_SUCCESS) {
+    LOG(LS_WARNING) << "Ignoring unexpected extra lines from stream";
+  } else if (res != SR_EOS) {
+    LOG(LS_WARNING) << "Error when checking for extra lines from stream";
+  }
+}
+
+// For caching the lsb_release output (reading it invokes a sub-process and
+// hence is somewhat expensive).
+static std::string lsb_release_string;
+static CriticalSection lsb_release_string_critsec;
+
+std::string ReadLinuxLsbRelease() {
+  CritScope cs(&lsb_release_string_critsec);
+  if (!lsb_release_string.empty()) {
+    // Have cached result from previous call.
+    return lsb_release_string;
+  }
+  // No cached result. Run lsb_release and parse output.
+  POpenStream lsb_release_output;
+  if (!lsb_release_output.Open("lsb_release -idrcs", "r", NULL)) {
+    LOG_ERR(LS_ERROR) << "Can't run lsb_release";
+    return lsb_release_string;  // empty
+  }
+  // Read in the command's output and build the string.
+  std::ostringstream sstr;
+  std::string line;
+  int wait_status;
+
+  if (!ExpectLineFromStream(&lsb_release_output, &line)) {
+    return lsb_release_string;  // empty
+  }
+  sstr << "DISTRIB_ID=" << line;
+
+  if (!ExpectLineFromStream(&lsb_release_output, &line)) {
+    return lsb_release_string;  // empty
+  }
+  sstr << " DISTRIB_DESCRIPTION=\"" << line << '"';
+
+  if (!ExpectLineFromStream(&lsb_release_output, &line)) {
+    return lsb_release_string;  // empty
+  }
+  sstr << " DISTRIB_RELEASE=" << line;
+
+  if (!ExpectLineFromStream(&lsb_release_output, &line)) {
+    return lsb_release_string;  // empty
+  }
+  sstr << " DISTRIB_CODENAME=" << line;
+
+  // Should not be anything left.
+  ExpectEofFromStream(&lsb_release_output);
+
+  lsb_release_output.Close();
+  wait_status = lsb_release_output.GetWaitStatus();
+  if (wait_status == -1 ||
+      !WIFEXITED(wait_status) ||
+      WEXITSTATUS(wait_status) != 0) {
+    LOG(LS_WARNING) << "Unexpected exit status from lsb_release";
+  }
+
+  lsb_release_string = sstr.str();
+
+  return lsb_release_string;
+}
+#endif
+
+std::string ReadLinuxUname() {
+  struct utsname buf;
+  if (uname(&buf) < 0) {
+    LOG_ERR(LS_ERROR) << "Can't call uname()";
+    return std::string();
+  }
+  std::ostringstream sstr;
+  sstr << buf.sysname << " "
+       << buf.release << " "
+       << buf.version << " "
+       << buf.machine;
+  return sstr.str();
+}
+
+int ReadCpuMaxFreq() {
+  FileStream fs;
+  std::string str;
+  int freq = -1;
+  if (!fs.Open(kCpuMaxFreqFile, "r", NULL) ||
+      SR_SUCCESS != fs.ReadLine(&str) ||
+      !FromString(str, &freq)) {
+    return -1;
+  }
+  return freq;
+}
+
+}  // namespace rtc
+
+#endif  // defined(WEBRTC_LINUX)