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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
62 lines
1.6 KiB
Swift
62 lines
1.6 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 - 2023 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 Foundation
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/// A thread safe container that contains a value of type `T`.
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///
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/// - Note: Unchecked sendable conformance because value is guarded by a lock.
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package class ThreadSafeBox<T: Sendable>: @unchecked Sendable {
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/// Lock guarding `_value`.
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private let lock = NSLock()
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private var _value: T
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package var value: T {
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get {
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return lock.withLock {
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return _value
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}
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}
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set {
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lock.withLock {
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_value = newValue
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}
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}
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_modify {
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lock.lock()
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defer { lock.unlock() }
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yield &_value
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}
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}
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package init(initialValue: T) {
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_value = initialValue
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}
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package func withLock<Result>(_ body: (inout T) -> Result) -> Result {
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return lock.withLock {
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return body(&_value)
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}
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}
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/// If the value in the box is an optional, return it and reset it to `nil`
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/// in an atomic operation.
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package func takeValue<U>() -> T where U? == T {
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lock.withLock {
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guard let value = self._value else { return nil }
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self._value = nil
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return value
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}
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}
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}
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