1 /*
<lambda>null2  * Copyright (C) 2023 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.tools.traces.surfaceflinger
18 
19 import android.tools.Timestamp
20 import android.tools.Trace
21 
22 class TransactionsTrace(override val entries: Collection<TransactionsTraceEntry>) :
23     Trace<TransactionsTraceEntry> {
24 
25     init {
26         val alwaysIncreasing =
27             entries
28                 .zipWithNext { prev, next ->
29                     prev.timestamp.elapsedNanos < next.timestamp.elapsedNanos
30                 }
31                 .all { it }
32 
33         require(alwaysIncreasing) {
34             "Transaction timestamp not always increasing: " +
35                 "[${entries.joinToString { it.timestamp.toString() }}]"
36         }
37     }
38 
39     val allTransactions: Collection<Transaction> = entries.flatMap { it.transactions }
40 
41     override fun slice(startTimestamp: Timestamp, endTimestamp: Timestamp): TransactionsTrace {
42         return TransactionsTrace(
43             entries
44                 .dropWhile { it.timestamp < startTimestamp }
45                 .dropLastWhile { it.timestamp > endTimestamp }
46         )
47     }
48 }
49