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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: concurrency_runtime
// UNSUPPORTED: back_deployment_runtime
// rdar://126118749
// UNSUPPORTED: CPU=arm64e
import Dispatch
import StdlibUnittest
import Dispatch
final class MyTaskExecutor: TaskExecutor, @unchecked Sendable {
let queue: DispatchQueue
init(queue: DispatchQueue) {
self.queue = queue
}
func enqueue(_ job: consuming ExecutorJob) {
let job = UnownedJob(job)
queue.async {
job.runSynchronously(on: self.asUnownedTaskExecutor())
}
}
}
func testTaskGroup(_ firstExecutor: MyTaskExecutor,
_ secondExecutor: MyTaskExecutor) async {
// 1 level of child tasks
await withTaskGroup(of: Int.self) { group in
group.addTask(executorPreference: firstExecutor) {
dispatchPrecondition(condition: .onQueue(firstExecutor.queue))
dispatchPrecondition(condition: .notOnQueue(secondExecutor.queue))
return 1
}
}
await withThrowingTaskGroup(of: Int.self) { group in
group.addTask(executorPreference: firstExecutor) {
dispatchPrecondition(condition: .onQueue(firstExecutor.queue))
dispatchPrecondition(condition: .notOnQueue(secondExecutor.queue))
return 2
}
}
await withDiscardingTaskGroup() { group in
group.addTask(executorPreference: firstExecutor) {
dispatchPrecondition(condition: .onQueue(firstExecutor.queue))
dispatchPrecondition(condition: .notOnQueue(secondExecutor.queue))
}
}
try! await withThrowingDiscardingTaskGroup() { group in
group.addTask(executorPreference: firstExecutor) {
dispatchPrecondition(condition: .onQueue(firstExecutor.queue))
dispatchPrecondition(condition: .notOnQueue(secondExecutor.queue))
}
}
// Multiple levels of child tasks
await withTaskGroup(of: Int.self) { group in
group.addTask(executorPreference: firstExecutor) {
dispatchPrecondition(condition: .onQueue(firstExecutor.queue))
dispatchPrecondition(condition: .notOnQueue(secondExecutor.queue))
return await withTaskGroup(of: Int.self) { group in
group.addTask(executorPreference: secondExecutor) {
dispatchPrecondition(condition: .notOnQueue(firstExecutor.queue))
dispatchPrecondition(condition: .onQueue(secondExecutor.queue))
return 12
}
return await group.next()!
}
}
}
// Disabling task preference, in task group child task
_ = await withTaskGroup(of: Int.self) { group in
dispatchPrecondition(condition: .notOnQueue(firstExecutor.queue))
dispatchPrecondition(condition: .notOnQueue(secondExecutor.queue))
group.addTask(executorPreference: secondExecutor) {
dispatchPrecondition(condition: .notOnQueue(firstExecutor.queue))
dispatchPrecondition(condition: .onQueue(secondExecutor.queue))
return await withTaskGroup(of: Int.self) { inner in
inner.addTask(executorPreference: globalConcurrentExecutor) {
// disabled the preference
dispatchPrecondition(condition: .notOnQueue(firstExecutor.queue))
dispatchPrecondition(condition: .notOnQueue(secondExecutor.queue))
return 42
}
return await inner.next()!
}
}
_ = group.addTaskUnlessCancelled(executorPreference: secondExecutor) {
dispatchPrecondition(condition: .notOnQueue(firstExecutor.queue))
dispatchPrecondition(condition: .onQueue(secondExecutor.queue))
return await withTaskGroup(of: Int.self) { inner in
inner.addTask(executorPreference: globalConcurrentExecutor) {
// disabled the preference
dispatchPrecondition(condition: .notOnQueue(firstExecutor.queue))
dispatchPrecondition(condition: .notOnQueue(secondExecutor.queue))
return 42
}
return await inner.next()!
}
}
group.addTask(executorPreference: secondExecutor) {
dispatchPrecondition(condition: .notOnQueue(firstExecutor.queue))
dispatchPrecondition(condition: .onQueue(secondExecutor.queue))
await withDiscardingTaskGroup { inner in
inner.addTask(executorPreference: globalConcurrentExecutor) {
// disabled the preference
dispatchPrecondition(condition: .notOnQueue(firstExecutor.queue))
dispatchPrecondition(condition: .notOnQueue(secondExecutor.queue))
}
_ = inner.addTaskUnlessCancelled(executorPreference: globalConcurrentExecutor) {
// disabled the preference
dispatchPrecondition(condition: .notOnQueue(firstExecutor.queue))
dispatchPrecondition(condition: .notOnQueue(secondExecutor.queue))
}
}
return 0
}
group.addTask(executorPreference: secondExecutor) {
dispatchPrecondition(condition: .notOnQueue(firstExecutor.queue))
dispatchPrecondition(condition: .onQueue(secondExecutor.queue))
try! await withThrowingDiscardingTaskGroup { inner in
inner.addTask(executorPreference: globalConcurrentExecutor) {
// disabled the preference
dispatchPrecondition(condition: .notOnQueue(firstExecutor.queue))
dispatchPrecondition(condition: .notOnQueue(secondExecutor.queue))
}
_ = inner.addTaskUnlessCancelled(executorPreference: globalConcurrentExecutor) {
// disabled the preference
dispatchPrecondition(condition: .notOnQueue(firstExecutor.queue))
dispatchPrecondition(condition: .notOnQueue(secondExecutor.queue))
}
}
return 0
}
return await group.next()!
}
}
func testAsyncLet(_ firstExecutor: MyTaskExecutor,
_ secondExecutor: MyTaskExecutor) async {
await withTaskExecutorPreference(firstExecutor) {
async let first: Int = {
dispatchPrecondition(condition: .onQueue(firstExecutor.queue))
dispatchPrecondition(condition: .notOnQueue(secondExecutor.queue))
return 12
}()
_ = await first
}
await withTaskExecutorPreference(firstExecutor) {
await withTaskExecutorPreference(secondExecutor) {
async let first: Int = {
dispatchPrecondition(condition: .notOnQueue(firstExecutor.queue))
dispatchPrecondition(condition: .onQueue(secondExecutor.queue))
return 12
}()
_ = await first
}
}
await withTaskExecutorPreference(firstExecutor) {
await withTaskExecutorPreference(secondExecutor) {
async let first: Int = {
async let firstInside: Int = {
dispatchPrecondition(condition: .notOnQueue(firstExecutor.queue))
dispatchPrecondition(condition: .onQueue(secondExecutor.queue))
return 12
}()
return await firstInside
}()
_ = await first
}
}
}
func testGroupAsyncLet(_ firstExecutor: MyTaskExecutor,
_ secondExecutor: MyTaskExecutor) async {
await withTaskGroup(of: Void.self) { group in
group.addTask(executorPreference: firstExecutor) {
dispatchPrecondition(condition: .onQueue(firstExecutor.queue))
dispatchPrecondition(condition: .notOnQueue(secondExecutor.queue))
async let first: () = expect(firstExecutor)
_ = await first
await withTaskExecutorPreference(secondExecutor) {
async let second: () = expect(secondExecutor)
_ = await second
}
}
}
}
func expect(_ expected: MyTaskExecutor) {
dispatchPrecondition(condition: .onQueue(expected.queue))
}
@main struct Main {
static func main() async {
let firstExecutor = MyTaskExecutor(queue: DispatchQueue(label: "first"))
let secondExecutor = MyTaskExecutor(queue: DispatchQueue(label: "second"))
await testTaskGroup(firstExecutor, secondExecutor)
await testAsyncLet(firstExecutor, secondExecutor)
await testGroupAsyncLet(firstExecutor, secondExecutor)
}
}
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