Abduqodiri Qurbonzoda
56 lines
1.4 KiB
Kotlin
56 lines
1.4 KiB
Kotlin
/*
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* Copyright 2010-2018 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license
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* that can be found in the LICENSE file.
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*/
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package runtime.memory.cycles0
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import kotlin.test.*
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data class Node(val data: Int, var next: Node?, var prev: Node?, val outer: Node?)
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fun makeCycle(len: Int, outer: Node?): Node {
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val start = Node(0, null, null, outer)
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var prev = start
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for (i in 1 .. len - 1) {
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prev = Node(i, prev, null, outer)
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}
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start.next = prev
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return start
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}
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fun makeDoubleCycle(len: Int): Node {
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val start = makeCycle(len, null)
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var prev = start
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var cur = prev.next
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while (cur != start) {
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cur!!.prev = prev
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prev = cur
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cur = cur.next
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}
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start.prev = prev
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return start
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}
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fun createCycles(junk: Node) {
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val cycle1 = makeCycle(1, junk)
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val cycle2 = makeCycle(2, junk)
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val cycle10 = makeCycle(10, junk)
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val cycle100 = makeCycle(100, junk)
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val dcycle1 = makeDoubleCycle(1)
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val dcycle2 = makeDoubleCycle(2)
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val dcycle10 = makeDoubleCycle(10)
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val dcycle100 = makeDoubleCycle(100)
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}
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@OptIn(kotlin.native.runtime.NativeRuntimeApi::class)
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@Test fun runTest() {
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// Create outer link from cyclic garbage.
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val outer = Node(42, null, null, null)
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createCycles(outer)
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kotlin.native.runtime.GC.collect()
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// Ensure outer is not collected.
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println(outer.data)
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}
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