Track execute() and enqueue() tasks separately from scheduled tas…

…ks. (#2645)

Sources/NIOPosix/MultiThreadedEventLoopGroup.swift

@@ -421,47 +421,28 @@ struct ErasedUnownedJob {
 
 @usableFromInline
 internal struct ScheduledTask {
- @usableFromInline
- enum UnderlyingTask {
- case function(() -> Void)
- #if compiler(>=5.9)
- case unownedJob(ErasedUnownedJob)
- #endif
- }
-
  /// The id of the scheduled task.
  ///
  /// - Important: This id has two purposes. First, it is used to give this struct an identity so that we can implement ``Equatable``
  /// Second, it is used to give the tasks an order which we use to execute them.
  /// This means, the ids need to be unique for a given ``SelectableEventLoop`` and they need to be in ascending order.
  @usableFromInline
  let id: UInt64
- let task: UnderlyingTask
- private let failFn: ((Error) ->())?
+ let task: () -> Void
+ private let failFn: (Error) -> Void
  @usableFromInline
  internal let readyTime: NIODeadline
 
  @usableFromInline
  init(id: UInt64, _ task: @escaping () -> Void, _ failFn: @escaping (Error) -> Void, _ time: NIODeadline) {
  self.id = id
- self.task = .function(task)
+ self.task = task
  self.failFn = failFn
  self.readyTime = time
  }
 
- #if compiler(>=5.9)
- @available(macOS 14.0, iOS 17.0, watchOS 10.0, tvOS 17.0, *)
- @usableFromInline
- init(id: UInt64, job: consuming ExecutorJob, readyTime: NIODeadline) {
- self.id = id
- self.task = .unownedJob(.init(job: UnownedJob(job)))
- self.readyTime = readyTime
- self.failFn = nil
- }
- #endif
-
  func fail(_ error: Error) {
- failFn?(error)
+ failFn(error)
  }
 }