process_metrics_ios.cc revision 7dbb3d5cf0c15f500944d211057644d6a2f37371 
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
9namespace base {
10
11namespace {
12
13bool 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
24ProcessMetrics::ProcessMetrics(ProcessHandle process) {}
25
26ProcessMetrics::~ProcessMetrics() {}
27
28// static
29ProcessMetrics* ProcessMetrics::CreateProcessMetrics(ProcessHandle process) {
30  return new ProcessMetrics(process);
31}
32
33size_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
40size_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
47size_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
65