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 package android.system;
18 
19 import libcore.util.Objects;;
20 
21 /**
22  * Corresponds to C's {@code struct timespec} from {@code <time.h>}.
23  */
24 public final class StructTimespec implements Comparable<StructTimespec> {
25     /** Seconds part of time of last data modification. */
26     public final long tv_sec; /*time_t*/
27 
28     /** Nanoseconds (values are [0, 999999999]). */
29     public final long tv_nsec;
30 
StructTimespec(long tv_sec, long tv_nsec)31     public StructTimespec(long tv_sec, long tv_nsec) {
32         this.tv_sec = tv_sec;
33         this.tv_nsec = tv_nsec;
34         if (tv_nsec < 0 || tv_nsec > 999_999_999) {
35             throw new IllegalArgumentException(
36                     "tv_nsec value " + tv_nsec + " is not in [0, 999999999]");
37         }
38     }
39 
40     @Override
compareTo(StructTimespec other)41     public int compareTo(StructTimespec other) {
42         if (tv_sec > other.tv_sec) {
43             return 1;
44         }
45         if (tv_sec < other.tv_sec) {
46             return -1;
47         }
48         if (tv_nsec > other.tv_nsec) {
49             return 1;
50         }
51         if (tv_nsec < other.tv_nsec) {
52             return -1;
53         }
54         return 0;
55     }
56 
57     @Override
equals(Object o)58     public boolean equals(Object o) {
59         if (this == o) return true;
60         if (o == null || getClass() != o.getClass()) return false;
61 
62         StructTimespec that = (StructTimespec) o;
63 
64         if (tv_sec != that.tv_sec) return false;
65         return tv_nsec == that.tv_nsec;
66     }
67 
68     @Override
hashCode()69     public int hashCode() {
70         int result = (int) (tv_sec ^ (tv_sec >>> 32));
71         result = 31 * result + (int) (tv_nsec ^ (tv_nsec >>> 32));
72         return result;
73     }
74 
75     @Override
toString()76     public String toString() {
77         return Objects.toString(this);
78     }
79 }
80