Port parts of base/process_util to Linux.

base/process_util.h

 // Copyright (c) 2006-2008 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/namespace contains utility functions for enumerating, ending and
 // computing statistics of processes.
 
 #ifndef BASE_PROCESS_UTIL_H_
 #define BASE_PROCESS_UTIL_H_
 
 #include "base/basictypes.h"
 
 #ifdef OS_WIN
 #include <windows.h>
 #include <tlhelp32.h>
 #endif
 
 #include <string>
 
 #include "base/process.h"
 
 #if defined(OS_WIN)
 typedef PROCESSENTRY32 ProcessEntry;
 typedef IO_COUNTERS IoCounters;
 #elif defined(OS_POSIX)
 typedef int ProcessEntry;
-typedef int IoCounters;  //TODO(awalker): replace with struct when available
+struct IoCounters {
+  unsigned long long ReadOperationCount;
+  unsigned long long WriteOperationCount;
+  unsigned long long OtherOperationCount;
+  unsigned long long ReadTransferCount;
+  unsigned long long WriteTransferCount;
+  unsigned long long OtherTransferCount;
+};
 #endif
 
 namespace process_util {
 
 // Returns the id of the current process.
 int GetCurrentProcId();
 
 // Returns the ProcessHandle of the current process.
 ProcessHandle GetCurrentProcessHandle();
 
@@ skipping 224 matching lines @@
 // overflow. Has no effect if the OS doesn't provide the necessary facility.
 void EnableTerminationOnHeapCorruption();
 
 // If supported on the platform, and the user has sufficent rights, increase
 // the current process's scheduling priority to a high priority.
 void RaiseProcessToHighPriority();
 
 }  // namespace process_util
 
 #endif  // BASE_PROCESS_UTIL_H_