1// Copyright 2015 Google Inc. All rights reserved.
2//
3// Licensed under the Apache License, Version 2.0 (the "License");
4// you may not use this file except in compliance with the License.
5// You may obtain a copy of the License at
6//
7// http://www.apache.org/licenses/LICENSE-2.0
8//
9// Unless required by applicable law or agreed to in writing, software
10// distributed under the License is distributed on an "AS IS" BASIS,
11// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12// See the License for the specific language governing permissions and
13// limitations under the License.
14
15#include "sleep.h"
16
17#include <cerrno>
18#include <ctime>
19
20#include "internal_macros.h"
21
22#ifdef BENCHMARK_OS_WINDOWS
23#include <Windows.h>
24#endif
25
26namespace benchmark {
27#ifdef BENCHMARK_OS_WINDOWS
28// Window's Sleep takes milliseconds argument.
29void SleepForMilliseconds(int milliseconds) { Sleep(milliseconds); }
30void SleepForSeconds(double seconds) {
31 SleepForMilliseconds(static_cast<int>(kNumMillisPerSecond * seconds));
32}
33#else // BENCHMARK_OS_WINDOWS
34void SleepForMicroseconds(int microseconds) {
35 struct timespec sleep_time;
36 sleep_time.tv_sec = microseconds / kNumMicrosPerSecond;
37 sleep_time.tv_nsec = (microseconds % kNumMicrosPerSecond) * kNumNanosPerMicro;
38 while (nanosleep(&sleep_time, &sleep_time) != 0 && errno == EINTR)
39 ; // Ignore signals and wait for the full interval to elapse.
40}
41
42void SleepForMilliseconds(int milliseconds) {
43 SleepForMicroseconds(static_cast<int>(milliseconds) * kNumMicrosPerMilli);
44}
45
46void SleepForSeconds(double seconds) {
47 SleepForMicroseconds(static_cast<int>(seconds * kNumMicrosPerSecond));
48}
49#endif // BENCHMARK_OS_WINDOWS
50} // end namespace benchmark
51