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2877675bd5
Change a l public declarations to the `package` access level, accept for: - The `LanguageServerProtocol` module - The `BuildServerProtocol` module - `InProcessClient.InProcessSourceKitLSPClient` - `LanguageServerProtocolJSONRPC` (I would like to create a more ergonomic API for this like `InProcessSourceKitLSPClient` in the future, but for now, we’ll leave it public) Unfortunately, our pattern of marking functions as `@_spi(Testing) public` no longer works with the `package` access level because declarations at the `package` access level cannot be marked as SPI. I have decided to just mark these functions as `package`. Alternatives would be: - Add an underscore to these functions, like we did for functions exposed for testing before the introduction of `SPI` - Use `@testable` import in the test targets and mark the methods as `internal` Resolves #1315 rdar://128295618
68 lines
2.5 KiB
Swift
68 lines
2.5 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 - 2024 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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/// Runs `operation`. If the task's priority changes while the operation is running, calls `taskPriorityChanged`.
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///
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/// Since Swift Concurrency doesn't support direct observation of a task's priority, this polls the task's priority at
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/// `pollingInterval`.
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/// The function assumes that the original priority of the task is `initialPriority`. If the task priority changed
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/// compared to `initialPriority`, the `taskPriorityChanged` will be called.
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package func withTaskPriorityChangedHandler<T: Sendable>(
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initialPriority: TaskPriority = Task.currentPriority,
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pollingInterval: Duration = .seconds(0.1),
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@_inheritActorContext operation: @escaping @Sendable () async throws -> T,
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taskPriorityChanged: @escaping @Sendable () -> Void
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) async throws -> T {
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let lastPriority = ThreadSafeBox(initialValue: initialPriority)
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let result: T? = try await withThrowingTaskGroup(of: Optional<T>.self) { taskGroup in
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taskGroup.addTask {
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while true {
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if Task.isCancelled {
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break
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}
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let newPriority = Task.currentPriority
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let didChange = lastPriority.withLock { lastPriority in
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if newPriority != lastPriority {
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lastPriority = newPriority
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return true
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}
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return false
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}
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if didChange {
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taskPriorityChanged()
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}
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do {
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try await Task.sleep(for: pollingInterval)
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} catch {
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break
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}
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}
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return nil
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}
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taskGroup.addTask {
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try await operation()
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}
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// The first task that watches the priority never finishes, so we are effectively await the `operation` task here
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// and cancelling the priority observation task once the operation task is done.
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// We do need to await the observation task as well so that priority escalation also affects the observation task.
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for try await case let value? in taskGroup {
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taskGroup.cancelAll()
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return value
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}
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return nil
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}
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guard let result else {
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throw CancellationError()
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}
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return result
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}
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