1 /*
2  * Copyright (C) 2017 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 "android-base/chrono_utils.h"
18 
19 #include <time.h>
20 
21 namespace android {
22 namespace base {
23 
now()24 boot_clock::time_point boot_clock::now() {
25 #ifdef __linux__
26   timespec ts;
27   clock_gettime(CLOCK_BOOTTIME, &ts);
28   return boot_clock::time_point(std::chrono::seconds(ts.tv_sec) +
29                                 std::chrono::nanoseconds(ts.tv_nsec));
30 #else
31   // Darwin and Windows do not support clock_gettime.
32   return boot_clock::time_point();
33 #endif  // __linux__
34 }
35 
operator <<(std::ostream & os,const Timer & t)36 std::ostream& operator<<(std::ostream& os, const Timer& t) {
37   os << t.duration().count() << "ms";
38   return os;
39 }
40 
41 }  // namespace base
42 }  // namespace android
43