Parse /proc/<pid>/stats fields as int64

base/process/internal_linux.cc

 // Copyright (c) 2012 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/process/internal_linux.h"
 
 #include <unistd.h>
 
 #include <map>
 #include <string>
@@ skipping 97 matching lines @@
 void ParseProcStat(const std::string& contents, ProcStatMap* output) {
   typedef std::pair<std::string, std::string> StringPair;
   std::vector<StringPair> key_value_pairs;
   SplitStringIntoKeyValuePairs(contents, ' ', '\n', &key_value_pairs);
   for (size_t i = 0; i < key_value_pairs.size(); ++i) {
     const StringPair& key_value_pair = key_value_pairs[i];
     output->insert(key_value_pair);
   }
 }
 
-int GetProcStatsFieldAsInt(const std::vector<std::string>& proc_stats,
-                           ProcStatsFields field_num) {
+int64 GetProcStatsFieldAsInt64(const std::vector<std::string>& proc_stats,
+                               ProcStatsFields field_num) {
   DCHECK_GE(field_num, VM_PPID);
   CHECK_LT(static_cast<size_t>(field_num), proc_stats.size());
 
-  int value;
-  return StringToInt(proc_stats[field_num], &value) ? value : 0;
+  int64 value;
+  return StringToInt64(proc_stats[field_num], &value) ? value : 0;
 }
 
 size_t GetProcStatsFieldAsSizeT(const std::vector<std::string>& proc_stats,
                                 ProcStatsFields field_num) {
   DCHECK_GE(field_num, VM_PPID);
   CHECK_LT(static_cast<size_t>(field_num), proc_stats.size());
 
   size_t value;
   return StringToSizeT(proc_stats[field_num], &value) ? value : 0;
 }
 
-int ReadProcStatsAndGetFieldAsInt(pid_t pid,
-                                  ProcStatsFields field_num) {
+int64 ReadProcStatsAndGetFieldAsInt64(pid_t pid, ProcStatsFields field_num) {
   std::string stats_data;
   if (!ReadProcStats(pid, &stats_data))
     return 0;
   std::vector<std::string> proc_stats;
   if (!ParseProcStats(stats_data, &proc_stats))
     return 0;
-  return GetProcStatsFieldAsInt(proc_stats, field_num);
+  return GetProcStatsFieldAsInt64(proc_stats, field_num);
 }
 
 size_t ReadProcStatsAndGetFieldAsSizeT(pid_t pid,
                                        ProcStatsFields field_num) {
   std::string stats_data;
   if (!ReadProcStats(pid, &stats_data))
     return 0;
   std::vector<std::string> proc_stats;
   if (!ParseProcStats(stats_data, &proc_stats))
     return 0;
@@ skipping 26 matching lines @@
   // which means the answer is 100.
   // It may be the case that this value is always 100.
   static const int kHertz = sysconf(_SC_CLK_TCK);
 
   return TimeDelta::FromMicroseconds(
       Time::kMicrosecondsPerSecond * clock_ticks / kHertz);
 }
 
 }  // namespace internal
 }  // namespace base