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// RUN: %target-run-simple-swift( -Xfrontend -disable-availability-checking %import-libdispatch -parse-as-library )
// REQUIRES: executable_test
// REQUIRES: concurrency
// REQUIRES: libdispatch
// REQUIRES: OS=macosx
// REQUIRES: objc_interop
// REQUIRES: concurrency_runtime
// UNSUPPORTED: back_deployment_runtime
import Dispatch
import StdlibUnittest
import _Concurrency
import Foundation
import Darwin
// Sneaky trick to make this type objc reference counted.
//
// This test specifically checks that our reference counting accounts for existence of
// objective-c types as TaskExecutors -- which was a bug where we'd swift_release
// obj-c excecutors by accident (rdar://131151645).
final class NSQueueTaskExecutor: NSData, TaskExecutor, @unchecked Sendable {
public func enqueue(_ _job: consuming ExecutorJob) {
let job = UnownedJob(_job)
DispatchQueue.main.async {
job.runSynchronously(on: self.asUnownedTaskExecutor())
}
}
}
@main struct Main {
static func main() async {
var taskExecutor: (any TaskExecutor)? = NSQueueTaskExecutor()
let task = Task(executorPreference: taskExecutor) {
dispatchPrecondition(condition: .onQueue(DispatchQueue.main))
try? await Task.sleep(for: .seconds(2))
return 12
}
taskExecutor = nil
let num = await task.value
assert(num == 12)
}
}
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