1 /* 2 * Copyright (C) 2008 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 #ifndef ANDROID_UTILS_SYSTEMCLOCK_H 18 #define ANDROID_UTILS_SYSTEMCLOCK_H 19 20 #include <stdint.h> 21 #include <sys/types.h> 22 23 // See https://developer.android.com/reference/android/os/SystemClock 24 // to learn more about Android's timekeeping facilities. 25 26 namespace android { 27 28 // Returns milliseconds since boot, not counting time spent in deep sleep. 29 int64_t uptimeMillis(); 30 // Returns nanoseconds since boot, not counting time spent in deep sleep. 31 int64_t uptimeNanos(); 32 // Returns milliseconds since boot, including time spent in sleep. 33 int64_t elapsedRealtime(); 34 // Returns nanoseconds since boot, including time spent in sleep. 35 int64_t elapsedRealtimeNano(); 36 37 } // namespace android 38 39 #endif // ANDROID_UTILS_SYSTEMCLOCK_H 40 41