src/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 namespace base {
  10
  11 namespace {
  12
  13 bool GetTaskInfo(task_basic_info_64* task_info_data) {
  14   mach_msg_type_number_t count = TASK_BASIC_INFO_64_COUNT;
  15   kern_return_t kr = task_info(mach_task_self(),
  16                                TASK_BASIC_INFO_64,
  17                                reinterpret_cast<task_info_t>(task_info_data),
  18                                &count);
  19   return kr == KERN_SUCCESS;
  20 }
  21
  22 }  // namespace
  23
  24 ProcessMetrics::ProcessMetrics(ProcessHandle process) {}
  25
  26 ProcessMetrics::~ProcessMetrics() {}
  27
  28 // static
  29 ProcessMetrics* ProcessMetrics::CreateProcessMetrics(ProcessHandle process) {
  30   return new ProcessMetrics(process);
  31 }
  32
  33 size_t ProcessMetrics::GetPagefileUsage() const {
  34   task_basic_info_64 task_info_data;
  35   if (!GetTaskInfo(&task_info_data))
  36     return 0;
  37   return task_info_data.virtual_size;
  38 }
  39
  40 size_t ProcessMetrics::GetWorkingSetSize() const {
  41   task_basic_info_64 task_info_data;
  42   if (!GetTaskInfo(&task_info_data))
  43     return 0;
  44   return task_info_data.resident_size;
  45 }
  46
  47 size_t GetMaxFds() {
  48   static const rlim_t kSystemDefaultMaxFds = 256;
  49   rlim_t max_fds;
  50   struct rlimit nofile;
  51   if (getrlimit(RLIMIT_NOFILE, &nofile)) {
  52     // Error case: Take a best guess.
  53     max_fds = kSystemDefaultMaxFds;
  54   } else {
  55     max_fds = nofile.rlim_cur;
  56   }
  57
  58   if (max_fds > INT_MAX)
  59     max_fds = INT_MAX;
  60
  61   return static_cast<size_t>(max_fds);
  62 }
  63
  64 }  // namespace base