1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
|
//===----------------------------------------------------------------------===//
//
// This source file is part of the Swift.org open source project
//
// Copyright (c) 2014 - 2024 Apple Inc. and the Swift project authors
// Licensed under Apache License v2.0 with Runtime Library Exception
//
// See https://swift.org/LICENSE.txt for license information
// See https://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
//
//===----------------------------------------------------------------------===//
package import Dispatch
import XCTest
/// Wrapper around `DispatchSemaphore` so that Swift Concurrency doesn't complain about the usage of semaphores in the
/// tests.
///
/// This should only be used for tests that test priority escalation and thus cannot await a `Task` (which would cause
/// priority elevations).
package struct WrappedSemaphore: Sendable {
private let name: String
private let semaphore = DispatchSemaphore(value: 0)
package init(name: String) {
self.name = name
}
package func signal(value: Int = 1) {
for _ in 0..<value {
semaphore.signal()
}
}
private func wait(timeout: DispatchTime) -> DispatchTimeoutResult {
semaphore.wait(timeout: timeout)
}
/// Wait for a signal and throw an error if the semaphore is not signaled within `timeout`.
package func waitOrThrow(timeout: DispatchTime = DispatchTime.now() + .seconds(Int(defaultTimeout))) throws {
struct TimeoutError: Error, CustomStringConvertible {
let name: String
var description: String { "\(name) timed out" }
}
switch self.wait(timeout: timeout) {
case .success:
break
case .timedOut:
throw TimeoutError(name: name)
}
}
/// Wait for a signal and emit an XCTFail if the semaphore is not signaled within `timeout`.
package func waitOrXCTFail(
timeout: DispatchTime = DispatchTime.now() + .seconds(Int(defaultTimeout)),
file: StaticString = #filePath,
line: UInt = #line
) {
switch self.wait(timeout: timeout) {
case .success:
break
case .timedOut:
XCTFail("\(name) timed out", file: file, line: line)
}
}
}
|
