GN: aix port along with linux_s390x, linux_ppc64 and linux_ppc64le support.

base/process/process_metrics_linux.cc

 // 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.
 
 #include "base/process/process_metrics.h"
 
 #include <dirent.h>
 #include <fcntl.h>
 #include <stddef.h>
 #include <stdint.h>
@@ skipping 74 matching lines @@
         return 0;
       }
       return value;
     }
   }
   // This can be reached if the process dies when proc is read -- in that case,
   // the kernel can return missing fields.
   return 0;
 }
 
-#if defined(OS_LINUX)
+#if defined(OS_LINUX) || defined(OS_AIX)
 // Read /proc/<pid>/sched and look for |field|. On succes, return true and
 // write the value for |field| into |result|.
 // Only works for fields in the form of "field    :     uint_value"
 bool ReadProcSchedAndGetFieldAsUint64(pid_t pid,
                                       const std::string& field,
                                       uint64_t* result) {
   std::string sched_data;
   {
     // Synchronously reading files in /proc does not hit the disk.
     ThreadRestrictions::ScopedAllowIO allow_io;
@@ skipping 11 matching lines @@
     if (key == field) {
       uint64_t value;
       if (!StringToUint64(value_str, &value))
         return false;
       *result = value;
       return true;
     }
   }
   return false;
 }
-#endif  // defined(OS_LINUX)
+#endif  // defined(OS_LINUX) || defined(OS_AIX)
 
 // Get the total CPU of a single process.  Return value is number of jiffies
 // on success or -1 on error.
 int GetProcessCPU(pid_t pid) {
   // Use /proc/<pid>/task to find all threads and parse their /stat file.
   FilePath task_path = internal::GetProcPidDir(pid).Append("task");
 
   DIR* dir = opendir(task_path.value().c_str());
   if (!dir) {
     DPLOG(ERROR) << "opendir(" << task_path.value() << ")";
@@ skipping 148 matching lines @@
     else if (key == "wchar")
       target_counter = &io_counters->WriteTransferCount;
     if (!target_counter)
       continue;
     bool converted = StringToUint64(value_str, target_counter);
     DCHECK(converted);
   }
   return true;
 }
 
-#if defined(OS_LINUX)
+#if defined(OS_LINUX) || defined(OS_AIX)
 int ProcessMetrics::GetOpenFdCount() const {
   // Use /proc/<pid>/fd to count the number of entries there.
   FilePath fd_path = internal::GetProcPidDir(process_).Append("fd");
 
   DirReaderPosix dir_reader(fd_path.value().c_str());
   if (!dir_reader.IsValid())
     return -1;
 
   int total_count = 0;
   for (; dir_reader.Next(); ) {
@@ skipping 23 matching lines @@
         int limit = -1;
         if (StringToInt(tokens[3], &limit))
           return limit;
         return -1;
       }
     }
   }
   return -1;
 }
 
-#endif  // defined(OS_LINUX)
+#endif  // defined(OS_LINUX) || defined(OS_AIX)
 
 ProcessMetrics::ProcessMetrics(ProcessHandle process)
     : process_(process),
       last_system_time_(0),
-#if defined(OS_LINUX)
+#if defined(OS_LINUX) || defined(OS_AIX)
       last_absolute_idle_wakeups_(0),
 #endif
       last_cpu_(0) {
   processor_count_ = SysInfo::NumberOfProcessors();
 }
 
 #if defined(OS_CHROMEOS)
 // Private, Shared and Proportional working set sizes are obtained from
 // /proc/<pid>/totmaps
 bool ProcessMetrics::GetWorkingSetKBytesTotmaps(WorkingSetKBytes *ws_usage)
@@ skipping 594 matching lines @@
   swap_info->orig_data_size = orig_data_size;
   swap_info->num_reads = ReadFileToUint64(zram_path.Append("num_reads"));
   swap_info->num_writes = ReadFileToUint64(zram_path.Append("num_writes"));
   swap_info->compr_data_size =
       ReadFileToUint64(zram_path.Append("compr_data_size"));
   swap_info->mem_used_total =
       ReadFileToUint64(zram_path.Append("mem_used_total"));
 }
 #endif  // defined(OS_CHROMEOS)
 
-#if defined(OS_LINUX)
+#if defined(OS_LINUX) || defined(OS_AIX)
 int ProcessMetrics::GetIdleWakeupsPerSecond() {
   uint64_t wake_ups;
   const char kWakeupStat[] = "se.statistics.nr_wakeups";
   return ReadProcSchedAndGetFieldAsUint64(process_, kWakeupStat, &wake_ups) ?
       CalculateIdleWakeupsPerSecond(wake_ups) : 0;
 }
-#endif  // defined(OS_LINUX)
+#endif  // defined(OS_LINUX) || defined(OS_AIX)
 
 }  // namespace base