74 lines
3.1 KiB
Swift
74 lines
3.1 KiB
Swift
//
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// MainActor+Unsafe.swift
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// Tusker
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//
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// Created by Shadowfacts on 2/19/23.
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// Copyright © 2023 Shadowfacts. All rights reserved.
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//
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import Foundation
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/*
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Copied from https://github.com/ChimeHQ/ConcurrencyPlus/blob/daf69ed837fa04d4ba666f5a99378cf1815f0dab/Sources/ConcurrencyPlus/MainActor%2BUnsafe.swift
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Copyright (c) 2022, Chime
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All rights reserved.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions are met:
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1. Redistributions of source code must retain the above copyright notice, this
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list of conditions and the following disclaimer.
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2. Redistributions in binary form must reproduce the above copyright notice,
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this list of conditions and the following disclaimer in the documentation
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and/or other materials provided with the distribution.
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3. Neither the name of the copyright holder nor the names of its
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contributors may be used to endorse or promote products derived from
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this software without specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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public extension MainActor {
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/// Execute the given body closure on the main actor without enforcing MainActor isolation.
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///
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/// This function exists to work around libraries with incorrect/inconsistent concurrency annotations. You should be **extremely** careful when using it, and only as a last resort.
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///
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/// It will crash if run on any non-main thread.
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@_unavailableFromAsync
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@available(macOS, obsoleted: 14.0)
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@available(iOS, obsoleted: 17.0)
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@available(watchOS, obsoleted: 10.0)
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@available(tvOS, obsoleted: 17.0)
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@available(visionOS 1.0, *)
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static func runUnsafely<T>(_ body: @MainActor () throws -> T) rethrows -> T {
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if #available(macOS 14.0, iOS 17.0, watchOS 10.0, tvOS 17.0, *) {
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return try MainActor.assumeIsolated(body)
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}
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dispatchPrecondition(condition: .onQueue(.main))
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return try withoutActuallyEscaping(body) { fn in
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try unsafeBitCast(fn, to: (() throws -> T).self)()
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}
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}
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@_unavailableFromAsync
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@available(*, deprecated, message: "Tool of last resort, do not use this.")
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static func runUnsafelyMaybeIntroducingDataRace<T>(_ body: @MainActor () throws -> T) rethrows -> T {
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return try withoutActuallyEscaping(body) { fn in
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try unsafeBitCast(fn, to: (() throws -> T).self)()
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}
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}
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}
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