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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,78 @@ | ||
| package com.bobbyesp.spowlo.utils | ||
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| import java.util.concurrent.locks.ReentrantReadWriteLock | ||
| import kotlin.concurrent.read | ||
| import kotlin.concurrent.write | ||
| import kotlin.math.min | ||
| import kotlin.random.Random | ||
|
|
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| fun <T> List<T>.subListNonStrict(length: Int, start: Int = 0) = | ||
| subList(start, min(start + length, size)) | ||
|
|
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| fun <T> MutableList<T>.swap(to: Collection<T>) { | ||
| with(this) { | ||
| clear() | ||
| addAll(to) | ||
| } | ||
| } | ||
|
|
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| fun <T> List<T>.randomSubList(length: Int) = List(length) { get(Random.nextInt(size)) } | ||
|
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| fun <T> List<T>.strictEquals(to: List<T>): Boolean { | ||
| if (size != to.size) return false | ||
| for (i in indices) { | ||
| if (get(i) != to[i]) return false | ||
| } | ||
| return true | ||
| } | ||
|
|
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| fun <T> List<T>.indexOfOrNull(value: T) = indexOfOrNull { it == value } | ||
| fun <T> List<T>.indexOfOrNull(predicate: (T) -> Boolean): Int? { | ||
| for (i in indices) { | ||
| if (predicate(get(i))) return i | ||
| } | ||
| return null | ||
| } | ||
|
|
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| fun <T> List<T>.distinctList() = distinct().toList() | ||
|
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| fun <T> List<T>.mutate(fn: MutableList<T>.() -> Unit): List<T> { | ||
| val out = toMutableList() | ||
| fn.invoke(out) | ||
| return out.toList() | ||
| } | ||
|
|
||
| class ConcurrentList<T> : MutableList<T> { | ||
| private val list = mutableListOf<T>() | ||
| private val lock = ReentrantReadWriteLock() | ||
|
|
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| override val size: Int get() = lock.read { list.size } | ||
|
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| override operator fun set(index: Int, element: T) = lock.write { list.set(index, element) } | ||
| override operator fun get(index: Int) = lock.read { list[index] } | ||
|
|
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| override fun contains(element: T) = lock.read { list.contains(element) } | ||
| override fun containsAll(elements: Collection<T>) = lock.read { list.containsAll(elements) } | ||
| override fun indexOf(element: T) = lock.read { list.indexOf(element) } | ||
| override fun lastIndexOf(element: T) = lock.read { list.lastIndexOf(element) } | ||
| override fun isEmpty() = lock.read { list.isEmpty() } | ||
| override fun subList(fromIndex: Int, toIndex: Int) = | ||
| lock.read { list.subList(fromIndex, toIndex) } | ||
|
|
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| override fun add(element: T) = lock.write { list.add(element) } | ||
| override fun add(index: Int, element: T) = lock.write { list.add(index, element) } | ||
| override fun addAll(elements: Collection<T>) = lock.write { list.addAll(elements) } | ||
| override fun addAll(index: Int, elements: Collection<T>) = | ||
| lock.write { list.addAll(index, elements) } | ||
|
|
||
| override fun clear() = lock.write { list.clear() } | ||
| override fun remove(element: T) = lock.write { list.remove(element) } | ||
| override fun removeAll(elements: Collection<T>) = lock.write { list.removeAll(elements) } | ||
| override fun removeAt(index: Int) = lock.write { list.removeAt(index) } | ||
| override fun retainAll(elements: Collection<T>) = lock.write { list.retainAll(elements) } | ||
|
|
||
| // NOTE: `write` lock since it returns `MutableIterator`s | ||
| override fun iterator() = lock.write { list.iterator() } | ||
| override fun listIterator() = lock.write { list.listIterator() } | ||
| override fun listIterator(index: Int) = lock.write { list.listIterator(index) } | ||
| } |
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