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

base/process/internal_linux.h

 // Copyright (c) 2013 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.
 
 // This file contains internal routines that are called by other files in
 // base/process/.
 
 #ifndef BASE_PROCESS_LINUX_INTERNAL_H_
 #define BASE_PROCESS_LINUX_INTERNAL_H_
 
@@ skipping 45 matching lines @@
   VM_STIME          = 14,  // Time scheduled in kernel mode in clock ticks.
   VM_NUMTHREADS     = 19,  // Number of threads.
   VM_STARTTIME      = 21,  // The time the process started in clock ticks.
   VM_VSIZE          = 22,  // Virtual memory size in bytes.
   VM_RSS            = 23,  // Resident Set Size in pages.
 };
 
 // Reads the |field_num|th field from |proc_stats|. Returns 0 on failure.
 // This version does not handle the first 3 values, since the first value is
 // simply |pid|, and the next two values are strings.
-int GetProcStatsFieldAsInt(const std::vector<std::string>& proc_stats,
-                           ProcStatsFields field_num);
+int64 GetProcStatsFieldAsInt64(const std::vector<std::string>& proc_stats,
+                               ProcStatsFields field_num);
 
-// Same as GetProcStatsFieldAsInt(), but for size_t values.
+// Same as GetProcStatsFieldAsInt64(), but for size_t values.
 size_t GetProcStatsFieldAsSizeT(const std::vector<std::string>& proc_stats,
                                 ProcStatsFields field_num);
 
-// Convenience wrapper around GetProcStatsFieldAsInt(), ParseProcStats() and
-// ReadProcStats(). See GetProcStatsFieldAsInt() for details.
-int ReadProcStatsAndGetFieldAsInt(pid_t pid,
-                                  ProcStatsFields field_num);
+// Convenience wrapper around GetProcStatsFieldAsInt64(), ParseProcStats() and
+// ReadProcStats(). See GetProcStatsFieldAsInt64() for details.
+int64 ReadProcStatsAndGetFieldAsInt64(pid_t pid, ProcStatsFields field_num);
 
-// Same as ReadProcStatsAndGetFieldAsInt() but for size_t values.
+// Same as ReadProcStatsAndGetFieldAsInt64() but for size_t values.
 size_t ReadProcStatsAndGetFieldAsSizeT(pid_t pid,
                                        ProcStatsFields field_num);
 
 // Returns the time that the OS started. Clock ticks are relative to this.
 Time GetBootTime();
 
 // Converts Linux clock ticks to a wall time delta.
 TimeDelta ClockTicksToTimeDelta(int clock_ticks);
 
 }  // namespace internal
 }  // namespace base
 
 #endif  // BASE_PROCESS_LINUX_INTERNAL_H_