1//
2// Copyright (C) 2013 The Android Open Source Project
3//
4// Licensed under the Apache License, Version 2.0 (the "License");
5// you may not use this file except in compliance with the License.
6// You may obtain a copy of the License at
7//
8//      http://www.apache.org/licenses/LICENSE-2.0
9//
10// Unless required by applicable law or agreed to in writing, software
11// distributed under the License is distributed on an "AS IS" BASIS,
12// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13// See the License for the specific language governing permissions and
14// limitations under the License.
15//
16
17#include "update_engine/common/clock.h"
18
19#include <time.h>
20
21namespace chromeos_update_engine {
22
23base::Time Clock::GetWallclockTime() {
24  return base::Time::Now();
25}
26
27base::Time Clock::GetMonotonicTime() {
28  struct timespec now_ts;
29  if (clock_gettime(CLOCK_MONOTONIC_RAW, &now_ts) != 0) {
30    // Avoid logging this as an error as call-sites may call this very
31    // often and we don't want to fill up the disk. Note that this
32    // only fails if running on ancient kernels (CLOCK_MONOTONIC_RAW
33    // was added in Linux 2.6.28) so it never fails on a ChromeOS
34    // device.
35    return base::Time();
36  }
37  struct timeval now_tv;
38  now_tv.tv_sec = now_ts.tv_sec;
39  now_tv.tv_usec = now_ts.tv_nsec/base::Time::kNanosecondsPerMicrosecond;
40  return base::Time::FromTimeVal(now_tv);
41}
42
43base::Time Clock::GetBootTime() {
44  struct timespec now_ts;
45  if (clock_gettime(CLOCK_BOOTTIME, &now_ts) != 0) {
46    // Avoid logging this as an error as call-sites may call this very
47    // often and we don't want to fill up the disk. Note that this
48    // only fails if running on ancient kernels (CLOCK_BOOTTIME was
49    // added in Linux 2.6.39) so it never fails on a ChromeOS device.
50    return base::Time();
51  }
52  struct timeval now_tv;
53  now_tv.tv_sec = now_ts.tv_sec;
54  now_tv.tv_usec = now_ts.tv_nsec/base::Time::kNanosecondsPerMicrosecond;
55  return base::Time::FromTimeVal(now_tv);
56}
57
58}  // namespace chromeos_update_engine
59