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 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 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
