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9229: TY&RES: ignore `impl`s from non-dependency crates r=dima74 a=vlad20012 Co-authored-by: vlad20012 <beskvlad@gmail.com>
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95 changes: 95 additions & 0 deletions
95
src/main/kotlin/org/rust/lang/core/resolve/RsImplIndexAndTypeAliasCache.kt
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,95 @@ | ||
| /* | ||
| * Use of this source code is governed by the MIT license that can be | ||
| * found in the LICENSE file. | ||
| */ | ||
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| package org.rust.lang.core.resolve | ||
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| import com.intellij.openapi.Disposable | ||
| import com.intellij.openapi.components.Service | ||
| import com.intellij.openapi.components.service | ||
| import com.intellij.openapi.project.Project | ||
| import com.intellij.psi.PsiElement | ||
| import com.intellij.psi.PsiFile | ||
| import com.intellij.util.containers.ContainerUtil | ||
| import org.rust.lang.core.psi.RustStructureChangeListener | ||
| import org.rust.lang.core.psi.rustPsiManager | ||
| import org.rust.lang.core.resolve.indexes.RsImplIndex | ||
| import org.rust.lang.core.resolve.indexes.RsTypeAliasIndex | ||
| import org.rust.lang.core.types.TyFingerprint | ||
| import java.util.concurrent.ConcurrentMap | ||
| import java.util.concurrent.atomic.AtomicReference | ||
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| @Service | ||
| class RsImplIndexAndTypeAliasCache(private val project: Project) : Disposable { | ||
| // strong key -> soft value maps | ||
| private val _implIndexCache: AtomicReference<ConcurrentMap<TyFingerprint, List<RsCachedImplItem>>?> = AtomicReference(null) | ||
| private val _typeAliasIndexCache: AtomicReference<ConcurrentMap<TyFingerprint, List<RsCachedTypeAlias>>?> = AtomicReference(null) | ||
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| private val implIndexCache: ConcurrentMap<TyFingerprint, List<RsCachedImplItem>> | ||
| get() = _implIndexCache.getOrCreateMap() | ||
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| private val typeAliasIndexCache: ConcurrentMap<TyFingerprint, List<RsCachedTypeAlias>> | ||
| get() = _typeAliasIndexCache.getOrCreateMap() | ||
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| /** | ||
| * This map is actually used is a [Set] (the value is always [placeholder]). | ||
| * The only purpose of this set is holding links to [PsiFile]s, so retain them in memory. | ||
| * Without this set [PsiFile]s are retained only by [java.lang.ref.WeakReference], hence they are | ||
| * quickly collected by GC and then further index lookups work slower. | ||
| * | ||
| * Note: keys in this map are referenced via [java.lang.ref.SoftReference], so they're also | ||
| * can be collected by GC, hence there isn't a memory leak | ||
| */ | ||
| private val usedPsiFiles: ConcurrentMap<PsiFile, Any> = ContainerUtil.createConcurrentSoftMap() | ||
| private val placeholder = Any() | ||
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| init { | ||
| val rustPsiManager = project.rustPsiManager | ||
| val connection = project.messageBus.connect(this) | ||
| rustPsiManager.subscribeRustStructureChange(connection, object : RustStructureChangeListener { | ||
| override fun rustStructureChanged(file: PsiFile?, changedElement: PsiElement?) { | ||
| _implIndexCache.getAndSet(null) | ||
| _typeAliasIndexCache.getAndSet(null) | ||
| } | ||
| }) | ||
| } | ||
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| fun findPotentialImpls(tyf: TyFingerprint): List<RsCachedImplItem> { | ||
| return implIndexCache.getOrPut(tyf) { | ||
| RsImplIndex.findPotentialImpls(project, tyf).filter { | ||
| retainPsi(it.impl.containingFile) | ||
| it.isValid | ||
| } | ||
| } | ||
| } | ||
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| fun findPotentialAliases(tyf: TyFingerprint): List<RsCachedTypeAlias> { | ||
| return typeAliasIndexCache.getOrPut(tyf) { | ||
| RsTypeAliasIndex.findPotentialAliases(project, tyf).filter { | ||
| retainPsi(it.alias.containingFile) | ||
| it.isFreeAndValid | ||
| } | ||
| } | ||
| } | ||
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| private fun retainPsi(containingFile: PsiFile) { | ||
| usedPsiFiles[containingFile] = placeholder | ||
| } | ||
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| override fun dispose() {} | ||
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| companion object { | ||
| fun getInstance(project: Project): RsImplIndexAndTypeAliasCache = | ||
| project.service() | ||
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| @JvmStatic | ||
| private fun <T : Any> AtomicReference<ConcurrentMap<TyFingerprint, T>?>.getOrCreateMap(): ConcurrentMap<TyFingerprint, T> { | ||
| while (true) { | ||
| get()?.let { return it } | ||
| val map = ContainerUtil.createConcurrentSoftValueMap<TyFingerprint, T>() | ||
| if (compareAndSet(null, map)) return map | ||
| } | ||
| } | ||
| } | ||
| } |
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