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74 lines
2.4 KiB
Swift
74 lines
2.4 KiB
Swift
//===----------------------------------------------------------------------===//
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//
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// This source file is part of the Swift.org open source project
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//
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// Copyright (c) 2020 - 2025 Apple Inc. and the Swift project authors
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// Licensed under Apache License v2.0 with Runtime Library Exception
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//
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// See https://swift.org/LICENSE.txt for license information
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// See https://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
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//
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//===----------------------------------------------------------------------===//
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#if !$Embedded && (os(macOS) || os(iOS) || os(tvOS) || os(watchOS) || os(visionOS))
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import Swift
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@_silgen_name("_swift_concurrency_dlopen_noload")
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private func dlopen_noload(_ path: UnsafePointer<CChar>?) -> OpaquePointer?
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@_silgen_name("_swift_concurrency_dlsym")
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private func dlsym(_ handle: OpaquePointer?, _ symbol: UnsafePointer<CChar>?) -> OpaquePointer?
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// .. Dynamic binding ..........................................................
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enum CoreFoundation {
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static let path =
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"/System/Library/Frameworks/CoreFoundation.framework/CoreFoundation"
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static let handle = unsafe dlopen_noload(path)
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static var isPresent: Bool { return unsafe handle != nil }
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static func symbol<T>(_ name: String) -> T {
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guard let result = unsafe dlsym(handle, name) else {
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fatalError("Unable to look up \(name) in CoreFoundation")
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}
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return unsafe unsafeBitCast(result, to: T.self)
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}
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static let CFRunLoopRun: @convention(c) () -> () =
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symbol("CFRunLoopRun")
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static let CFRunLoopGetMain: @convention(c) () -> OpaquePointer =
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unsafe symbol("CFRunLoopGetMain")
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static let CFRunLoopStop: @convention(c) (OpaquePointer) -> () =
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unsafe symbol("CFRunLoopStop")
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}
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// .. Main Executor ............................................................
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/// A CFRunLoop-based main executor (Apple platforms only)
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@available(StdlibDeploymentTarget 6.3, *)
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final class CFMainExecutor: DispatchMainExecutor, @unchecked Sendable {
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override public func run() throws {
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CoreFoundation.CFRunLoopRun()
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}
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override public func stop() {
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unsafe CoreFoundation.CFRunLoopStop(CoreFoundation.CFRunLoopGetMain())
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}
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}
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// .. Task Executor ............................................................
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/// A `TaskExecutor` to match `CFMainExecutor` (Apple platforms only)
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@available(StdlibDeploymentTarget 6.3, *)
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final class CFTaskExecutor: DispatchGlobalTaskExecutor,
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@unchecked Sendable {
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}
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#endif
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