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https://github.com/apple/sourcekit-lsp.git
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a6c291b84e
We previously waited for the initialization response from the build server during the creation of a `Workspace` so that we could create a `SemanticIndexManager` with the index store path etc. that was returned by the `build/initialize` response. This caused all functionality (including syntactic) of SourceKit-LSP to be blocked until the build server was initialized. Change the computation of the `SemanticIndexManager` and related types to happen in the background so that we can provide functionality that doesn’t rely on the build server immediately. Fixes #2304
61 lines
2.1 KiB
Swift
61 lines
2.1 KiB
Swift
//===----------------------------------------------------------------------===//
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//
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// This source file is part of the Swift.org open source project
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//
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// Copyright (c) 2014 - 2020 Apple Inc. and the Swift project authors
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// Licensed under Apache License v2.0 with Runtime Library Exception
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//
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// See https://swift.org/LICENSE.txt for license information
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// See https://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
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//
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//===----------------------------------------------------------------------===//
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import Dispatch
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import IndexStoreDB
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import LanguageServerProtocolExtensions
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import SKLogging
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import SwiftExtensions
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/// `IndexDelegate` for the SourceKit workspace.
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actor SourceKitIndexDelegate: IndexDelegate {
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/// Registered `MainFilesDelegate`s to notify when main files change.
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var mainFilesChangedCallback: @Sendable () async -> Void
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/// The count of pending unit events. Whenever this transitions to 0, it represents a time where
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/// the index finished processing known events. Of course, that may have already changed by the
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/// time we are notified.
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let pendingUnitCount = AtomicInt32(initialValue: 0)
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package init(mainFilesChangedCallback: @escaping @Sendable () async -> Void) {
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self.mainFilesChangedCallback = mainFilesChangedCallback
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}
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nonisolated package func processingAddedPending(_ count: Int) {
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pendingUnitCount.value += Int32(count)
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}
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nonisolated package func processingCompleted(_ count: Int) {
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pendingUnitCount.value -= Int32(count)
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if pendingUnitCount.value == 0 {
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Task {
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await indexChanged()
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}
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}
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if pendingUnitCount.value < 0 {
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// Technically this is not data race safe because `pendingUnitCount` might change between the check and us setting
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// it to 0. But then, this should never happen anyway, so it's fine.
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logger.fault("pendingUnitCount dropped below zero: \(self.pendingUnitCount.value)")
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pendingUnitCount.value = 0
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Task {
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await indexChanged()
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}
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}
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}
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private func indexChanged() async {
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logger.debug("IndexStoreDB changed")
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await mainFilesChangedCallback()
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}
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}
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