Add minimal support for process_utils on iOS

base/process_util.h

 // 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.
 
 // This file/namespace contains utility functions for enumerating, ending and
 // computing statistics of processes.
 
 #ifndef BASE_PROCESS_UTIL_H_
 #define BASE_PROCESS_UTIL_H_
 #pragma once
@@ skipping 681 matching lines @@
 // Provides performance metrics for a specified process (CPU usage, memory and
 // IO counters). To use it, invoke CreateProcessMetrics() to get an instance
 // for a specific process, then access the information with the different get
 // methods.
 class BASE_EXPORT ProcessMetrics {
  public:
   ~ProcessMetrics();
 
   // Creates a ProcessMetrics for the specified process.
   // The caller owns the returned object.
-#if !defined(OS_MACOSX)
+#if !defined(OS_MACOSX) || defined(OS_IOS)
   static ProcessMetrics* CreateProcessMetrics(ProcessHandle process);
 #else
   class PortProvider {
    public:
     // Should return the mach task for |process| if possible, or else
     // |MACH_PORT_NULL|. Only processes that this returns tasks for will have
     // metrics on OS X (except for the current process, which always gets
     // metrics).
     virtual mach_port_t TaskForPid(ProcessHandle process) const = 0;
   };
 
   // The port provider needs to outlive the ProcessMetrics object returned by
   // this function. If NULL is passed as provider, the returned object
   // only returns valid metrics if |process| is the current process.
   static ProcessMetrics* CreateProcessMetrics(ProcessHandle process,
                                               PortProvider* port_provider);
-#endif  // !defined(OS_MACOSX)
+#endif  // !defined(OS_MACOSX) || defined(OS_IOS)
 
   // Returns the current space allocated for the pagefile, in bytes (these pages
   // may or may not be in memory).  On Linux, this returns the total virtual
   // memory size.
   size_t GetPagefileUsage() const;
   // Returns the peak space allocated for the pagefile, in bytes.
   size_t GetPeakPagefileUsage() const;
   // Returns the current working set size, in bytes.  On Linux, this returns
   // the resident set size.
   size_t GetWorkingSetSize() const;
@@ skipping 27 matching lines @@
   double GetCPUUsage();
 
   // Retrieves accounting information for all I/O operations performed by the
   // process.
   // If IO information is retrieved successfully, the function returns true
   // and fills in the IO_COUNTERS passed in. The function returns false
   // otherwise.
   bool GetIOCounters(IoCounters* io_counters) const;
 
  private:
-#if !defined(OS_MACOSX)
+#if !defined(OS_MACOSX) || defined(OS_IOS)
   explicit ProcessMetrics(ProcessHandle process);
 #else
   ProcessMetrics(ProcessHandle process, PortProvider* port_provider);
-#endif  // defined(OS_MACOSX)
+#endif  // !defined(OS_MACOSX) || defined(OS_IOS)
 
   ProcessHandle process_;
 
   int processor_count_;
 
   // Used to store the previous times and CPU usage counts so we can
   // compute the CPU usage between calls.
   int64 last_time_;
   int64 last_system_time_;
 
+#if !defined(OS_IOS)
 #if defined(OS_MACOSX)
   // Queries the port provider if it's set.
   mach_port_t TaskForPid(ProcessHandle process) const;
 
   PortProvider* port_provider_;
 #elif defined(OS_POSIX)
   // Jiffie count at the last_time_ we updated.
   int last_cpu_;
 #endif  // defined(OS_POSIX)
+#endif  // !defined(OS_IOS)
 
   DISALLOW_COPY_AND_ASSIGN(ProcessMetrics);
 };
 
 #if defined(OS_LINUX) || defined(OS_ANDROID)
 // Data from /proc/meminfo about system-wide memory consumption.
 // Values are in KB.
 struct BASE_EXPORT SystemMemoryInfoKB {
   SystemMemoryInfoKB();
 
@@ skipping 53 matching lines @@
 // instance running inside the parent.  The parent's Breakpad instance should
 // not handle the child's exceptions.  Calling RestoreDefaultExceptionHandler
 // in the child after forking will restore the standard exception handler.
 // See http://crbug.com/20371/ for more details.
 void RestoreDefaultExceptionHandler();
 #endif  // defined(OS_MACOSX)
 
 }  // namespace base
 
 #endif  // BASE_PROCESS_UTIL_H_