base/process_info_mac.cc

   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.h"
  14
  15 namespace {
  16
  17 using base::Time;
  18
  19 // Returns the process creation time, or NULL if an error occurred.
  20 Time* 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
  35 namespace base {
  36
  37 //static
  38 const Time* CurrentProcessInfo::CreationTime() {
  39   static Time* process_creation_time = ProcessCreationTimeInternal();
  40   return process_creation_time;
  41 }
  42
  43 }  // namespace base