remove moveonly Job APIs from the task-to-thread model

Author: ktoso

stdlib/public/Concurrency/Executor.swift

@@ -16,14 +16,18 @@ import Swift
 @available(SwiftStdlib 5.1, *)
 public protocol Executor: AnyObject, Sendable {
 
+  #if !SWIFT_STDLIB_TASK_TO_THREAD_MODEL_CONCURRENCY
   @available(macOS, introduced: 10.15, deprecated: 9999, message: "Implement 'enqueue(_: __owned Job)' instead")
   @available(iOS, introduced: 13.0, deprecated: 9999, message: "Implement 'enqueue(_: __owned Job)' instead")
   @available(watchOS, introduced: 6.0, deprecated: 9999, message: "Implement 'enqueue(_: __owned Job)' instead")
   @available(tvOS, introduced: 13.0, deprecated: 9999, message: "Implement 'enqueue(_: __owned Job)' instead")
+  #endif // !SWIFT_STDLIB_TASK_TO_THREAD_MODEL_CONCURRENCY
   func enqueue(_ job: UnownedJob)
 
+  #if !SWIFT_STDLIB_TASK_TO_THREAD_MODEL_CONCURRENCY
   @available(SwiftStdlib 5.9, *)
   func enqueue(_ job: __owned Job)
+  #endif // !SWIFT_STDLIB_TASK_TO_THREAD_MODEL_CONCURRENCY
 }
 
 /// A service that executes jobs.
@@ -34,26 +38,31 @@ public protocol SerialExecutor: Executor {
   // avoid drilling down to the base conformance just for the basic
   // work-scheduling operation.
   @_nonoverride
+  #if !SWIFT_STDLIB_TASK_TO_THREAD_MODEL_CONCURRENCY
   @available(macOS, introduced: 10.15, deprecated: 9999, message: "Implement 'enqueue(_: __owned Job)' instead")
   @available(iOS, introduced: 13.0, deprecated: 9999, message: "Implement 'enqueue(_: __owned Job)' instead")
   @available(watchOS, introduced: 6.0, deprecated: 9999, message: "Implement 'enqueue(_: __owned Job)' instead")
   @available(tvOS, introduced: 13.0, deprecated: 9999, message: "Implement 'enqueue(_: __owned Job)' instead")
+  #endif // !SWIFT_STDLIB_TASK_TO_THREAD_MODEL_CONCURRENCY
   func enqueue(_ job: UnownedJob)
 
+  #if !SWIFT_STDLIB_TASK_TO_THREAD_MODEL_CONCURRENCY
   // This requirement is repeated here as a non-override so that we
   // get a redundant witness-table entry for it.  This allows us to
   // avoid drilling down to the base conformance just for the basic
   // work-scheduling operation.
   @_nonoverride
   @available(SwiftStdlib 5.9, *)
   func enqueue(_ job: __owned Job)
+  #endif // !SWIFT_STDLIB_TASK_TO_THREAD_MODEL_CONCURRENCY
 
   /// Convert this executor value to the optimized form of borrowed
   /// executor references.
   @available(SwiftStdlib 5.9, *)
   func asUnownedSerialExecutor() -> UnownedSerialExecutor
 }
 
+#if !SWIFT_STDLIB_TASK_TO_THREAD_MODEL_CONCURRENCY
 @available(SwiftStdlib 5.9, *)
 extension Executor {
   public func enqueue(_ job: UnownedJob) {
@@ -64,6 +73,7 @@ extension Executor {
     self.enqueue(UnownedJob(job))
   }
 }
+#endif // !SWIFT_STDLIB_TASK_TO_THREAD_MODEL_CONCURRENCY
 
 @available(SwiftStdlib 5.9, *)
 extension SerialExecutor {
@@ -159,11 +169,15 @@ internal func _getJobTaskId(_ job: UnownedJob) -> UInt64
 @_silgen_name("_swift_task_enqueueOnExecutor")
 internal func _enqueueOnExecutor<E>(job unownedJob: UnownedJob, executor: E)
 where E: SerialExecutor {
+  #if !SWIFT_STDLIB_TASK_TO_THREAD_MODEL_CONCURRENCY
   if #available(SwiftStdlib 5.9, *) {
     executor.enqueue(Job(context: unownedJob._context))
   } else {
     executor.enqueue(unownedJob)
   }
+  #else // SWIFT_STDLIB_TASK_TO_THREAD_MODEL_CONCURRENCY
+  executor.enqueue(unownedJob)
+  #endif // !SWIFT_STDLIB_TASK_TO_THREAD_MODEL_CONCURRENCY
 }
 
 #if !SWIFT_STDLIB_SINGLE_THREADED_CONCURRENCY && !SWIFT_STDLIB_TASK_TO_THREAD_MODEL_CONCURRENCY

stdlib/public/Concurrency/PartialAsyncTask.swift

@@ -42,11 +42,13 @@ public struct UnownedJob: Sendable {
     self.context = context
   }
 
+  #if !SWIFT_STDLIB_TASK_TO_THREAD_MODEL_CONCURRENCY
   /// Create an `UnownedJob` whose lifetime must be managed carefully until it is run exactly once.
   @available(SwiftStdlib 5.9, *)
   public init(_ job: __owned Job) {
     self.context = job.context
   }
+  #endif // !SWIFT_STDLIB_TASK_TO_THREAD_MODEL_CONCURRENCY
 
   /// The priority of this job.
   @available(SwiftStdlib 5.9, *)
@@ -102,7 +104,8 @@ extension UnownedJob: CustomStringConvertible {
   }
 }
 
-/// A unit of scheduleable work.
+#if !SWIFT_STDLIB_TASK_TO_THREAD_MODEL_CONCURRENCY
+//// A unit of scheduleable work.
 ///
 /// Unless you're implementing a scheduler,
 /// you don't generally interact with jobs directly.
@@ -165,6 +168,7 @@ extension Job {
     _swiftJobRun(UnownedJob(self), executor)
   }
 }
+#endif // !SWIFT_STDLIB_TASK_TO_THREAD_MODEL_CONCURRENCY
 
 // ==== -----------------------------------------------------------------------
 // MARK: JobPriority