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 26 namespace benchmark { 27 #ifdef BENCHMARK_OS_WINDOWS 28 // Window's Sleep takes milliseconds argument. 29 void SleepForMilliseconds(int milliseconds) { Sleep(milliseconds); } 30 void SleepForSeconds(double seconds) { 31 SleepForMilliseconds(static_cast<int>(kNumMillisPerSecond * seconds)); 32 } 33 #else // BENCHMARK_OS_WINDOWS 34 void 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 42 void SleepForMilliseconds(int milliseconds) { 43 SleepForMicroseconds(static_cast<int>(milliseconds) * kNumMicrosPerMilli); 44 } 45 46 void SleepForSeconds(double seconds) { 47 SleepForMicroseconds(static_cast<int>(seconds * kNumMicrosPerSecond)); 48 } 49 #endif // BENCHMARK_OS_WINDOWS 50 } // end namespace benchmark 51
