base/process/process_metrics_ios.cc

   1 // Copyright (c) 2013 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "base/process/process_metrics.h"
   6
   7 #include <mach/task.h>
   8
   9 #include "base/logging.h"
  10
  11 namespace base {
  12
  13 namespace {
  14
  15 bool GetTaskInfo(task_basic_info_64* task_info_data) {
  16   mach_msg_type_number_t count = TASK_BASIC_INFO_64_COUNT;
  17   kern_return_t kr = task_info(mach_task_self(),
  18                                TASK_BASIC_INFO_64,
  19                                reinterpret_cast<task_info_t>(task_info_data),
  20                                &count);
  21   return kr == KERN_SUCCESS;
  22 }
  23
  24 }  // namespace
  25
  26 ProcessMetrics::ProcessMetrics(ProcessHandle process) {}
  27
  28 ProcessMetrics::~ProcessMetrics() {}
  29
  30 // static
  31 ProcessMetrics* ProcessMetrics::CreateProcessMetrics(ProcessHandle process) {
  32   return new ProcessMetrics(process);
  33 }
  34
  35 double ProcessMetrics::GetCPUUsage() {
  36   NOTIMPLEMENTED();
  37   return 0;
  38 }
  39
  40 size_t ProcessMetrics::GetPagefileUsage() const {
  41   task_basic_info_64 task_info_data;
  42   if (!GetTaskInfo(&task_info_data))
  43     return 0;
  44   return task_info_data.virtual_size;
  45 }
  46
  47 size_t ProcessMetrics::GetWorkingSetSize() const {
  48   task_basic_info_64 task_info_data;
  49   if (!GetTaskInfo(&task_info_data))
  50     return 0;
  51   return task_info_data.resident_size;
  52 }
  53
  54 size_t GetMaxFds() {
  55   static const rlim_t kSystemDefaultMaxFds = 256;
  56   rlim_t max_fds;
  57   struct rlimit nofile;
  58   if (getrlimit(RLIMIT_NOFILE, &nofile)) {
  59     // Error case: Take a best guess.
  60     max_fds = kSystemDefaultMaxFds;
  61   } else {
  62     max_fds = nofile.rlim_cur;
  63   }
  64
  65   if (max_fds > INT_MAX)
  66     max_fds = INT_MAX;
  67
  68   return static_cast<size_t>(max_fds);
  69 }
  70
  71 void SetFdLimit(unsigned int max_descriptors) {
  72   // Unimplemented.
  73 }
  74
  75 size_t GetPageSize() {
  76   return getpagesize();
  77 }
  78
  79 // Bytes committed by the system.
  80 size_t GetSystemCommitCharge() {
  81   NOTIMPLEMENTED();
  82   return 0;
  83 }
  84
  85 }  // namespace base