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// RUN: %target-run-simple-swift( -Xfrontend -disable-availability-checking %import-libdispatch -parse-as-library) | %FileCheck %s --dump-input always
// REQUIRES: executable_test
// REQUIRES: concurrency
// REQUIRES: libdispatch
// rdar://76038845
// REQUIRES: concurrency_runtime
// UNSUPPORTED: back_deployment_runtime
import Dispatch
@available(SwiftStdlib 5.1, *)
func asyncEcho(_ value: Int) async -> Int {
value
}
/// Tests that only the specific group we cancelAll on is cancelled,
/// and not accidentally all tasks in all groups within the given parent task.
@available(SwiftStdlib 5.1, *)
func test_taskGroup_cancelAll_onlySpecificGroup() async {
async let g1: Int = withTaskGroup(of: Int.self) { group in
for i in 1...5 {
group.spawn {
await Task.sleep(1_000_000_000)
let c = Task.isCancelled
print("add: \(i) (cancelled: \(c))")
return i
}
}
var sum = 0
while let got = try! await group.next() {
print("next: \(got)")
sum += got
}
let c = Task.isCancelled
print("g1 task cancelled: \(c)")
let cc = group.isCancelled
print("g1 group cancelled: \(cc)")
return sum
}
// The cancellation os g2 should have no impact on g1
let g2: Int = try! await withTaskGroup(of: Int.self) { group in
for i in 1...3 {
group.spawn {
await Task.sleep(1_000_000_000)
let c = Task.isCancelled
print("g1 task \(i) (cancelled: \(c))")
return i
}
}
print("cancelAll")
group.cancelAll()
let c = Task.isCancelled
print("g2 task cancelled: \(c)")
let cc = group.isCancelled
print("g2 group cancelled: \(cc)")
return 0
}
let result1 = try! await g1
let result2 = try! await g2
// CHECK: g2 task cancelled: false
// CHECK: g2 group cancelled: true
// CHECK: g1 task cancelled: false
// CHECK: g1 group cancelled: false
print("g1: \(result1)") // CHECK: g1: 15
print("g2: \(result2)") // CHECK: g2: 0
}
@available(SwiftStdlib 5.1, *)
@main struct Main {
static func main() async {
await test_taskGroup_cancelAll_onlySpecificGroup()
}
}
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