sourcekit-lsp/Sources/SwiftSourceKitPluginCommon/DynamicallyLoadedSourceKitdD+forPlugin.swift

//===----------------------------------------------------------------------===//
//
// This source file is part of the Swift.org open source project
//
// Copyright (c) 2014 - 2024 Apple Inc. and the Swift project authors
// Licensed under Apache License v2.0 with Runtime Library Exception
//
// See https://swift.org/LICENSE.txt for license information
// See https://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
//
//===----------------------------------------------------------------------===//

import Foundation
@_spi(SourceKitLSP) import SKLogging
package import SourceKitD
import SwiftExtensions

extension SourceKitD {
  private static nonisolated(unsafe) var _forPlugin: SourceKitD?

  package static var isPluginLoaded: Bool {
    return _forPlugin != nil
  }

  package static var forPlugin: SourceKitD {
    get {
      guard let _forPlugin else {
        fatalError("forPlugin must only be accessed after it was set in sourcekitd_plugin_initialize_2")
      }
      return _forPlugin
    }
    set {
      precondition(_forPlugin == nil, "SourceKitD.forPlugin must not be set twice")
      _forPlugin = newValue
    }
  }
}