1 /* Copyright 2015 The TensorFlow Authors. 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 16 #include <sys/time.h> 17 #include <time.h> 18 19 #include "tensorflow/core/platform/env_time.h" 20 21 namespace tensorflow { 22 23 namespace { 24 25 class PosixEnvTime : public EnvTime { 26 public: PosixEnvTime()27 PosixEnvTime() {} 28 NowNanos()29 uint64 NowNanos() override { 30 struct timespec ts; 31 clock_gettime(CLOCK_REALTIME, &ts); 32 return (static_cast<uint64>(ts.tv_sec) * kSecondsToNanos + 33 static_cast<uint64>(ts.tv_nsec)); 34 } 35 }; 36 37 } // namespace 38 39 #if defined(PLATFORM_POSIX) || defined(__ANDROID__) Default()40EnvTime* EnvTime::Default() { 41 static EnvTime* default_env_time = new PosixEnvTime; 42 return default_env_time; 43 } 44 #endif 45 46 } // namespace tensorflow 47