process_info_mac.cc revision eb525c5499e34cc9c4b825d6d9e75bb07cc06ace 
1// Copyright (c) 2012 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_info.h"
6
7#include <sys/sysctl.h>
8#include <sys/time.h>
9#include <unistd.h>
10
11#include "base/basictypes.h"
12#include "base/memory/scoped_ptr.h"
13#include "base/time/time.h"
14
15namespace {
16
17using base::Time;
18
19// Returns the process creation time, or NULL if an error occurred.
20Time* ProcessCreationTimeInternal() {
21  int mib[] = { CTL_KERN, KERN_PROC, KERN_PROC_PID, getpid() };
22  size_t len = 0;
23  if (sysctl(mib, arraysize(mib), NULL, &len, NULL, 0) < 0)
24    return NULL;
25
26  scoped_ptr_malloc<struct kinfo_proc>
27      proc(static_cast<struct kinfo_proc*>(malloc(len)));
28  if (sysctl(mib, arraysize(mib), proc.get(), &len, NULL, 0) < 0)
29    return NULL;
30  return new Time(Time::FromTimeVal(proc->kp_proc.p_un.__p_starttime));
31}
32
33}  // namespace
34
35namespace base {
36
37//static
38const Time* CurrentProcessInfo::CreationTime() {
39  static Time* process_creation_time = ProcessCreationTimeInternal();
40  return process_creation_time;
41}
42
43}  // namespace base
44