| /* |
| * Copyright (C) 2011 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package android.system; |
| |
| import libcore.util.NonNull; |
| import libcore.util.Objects; |
| |
| /** |
| * Corresponds to C's {@code struct timeval} from {@code sys/time.h}. |
| */ |
| public final class StructTimeval { |
| /** Seconds. */ |
| public final long tv_sec; |
| |
| /** Microseconds. */ |
| public final long tv_usec; |
| |
| private StructTimeval(long tv_sec, long tv_usec) { |
| this.tv_sec = tv_sec; |
| this.tv_usec = tv_usec; |
| if (tv_usec < 0 || tv_usec > 999_999) { |
| throw new IllegalArgumentException( |
| "tv_usec value " + tv_usec + " is not in [0, 999999]"); |
| } |
| } |
| |
| public static @NonNull StructTimeval fromMillis(long millis) { |
| // tv_sec can be positive or negative. tv_usec can only be positive. Negative numbers are |
| // represented by rounding down to the nearest whole second <= the one we need |
| // (i.e. floor()) and adding the necessary micro seconds. |
| long tv_sec = millis / 1000; |
| long tv_usec = (millis - (tv_sec * 1000)) * 1000; |
| if (millis < 0) { |
| tv_sec -= 1; |
| tv_usec += 1_000_000; |
| } |
| return new StructTimeval(tv_sec, tv_usec); |
| } |
| |
| public long toMillis() { |
| return (tv_sec * 1000) + (tv_usec / 1000); |
| } |
| |
| @Override |
| public String toString() { |
| return Objects.toString(this); |
| } |
| |
| @Override |
| public boolean equals(Object o) { |
| if (this == o) { |
| return true; |
| } |
| if (o == null || getClass() != o.getClass()) { |
| return false; |
| } |
| StructTimeval that = (StructTimeval) o; |
| return tv_sec == that.tv_sec && |
| tv_usec == that.tv_usec; |
| } |
| |
| @Override |
| public int hashCode() { |
| return java.util.Objects.hash(tv_sec, tv_usec); |
| } |
| } |