//
//  MainActor+Unsafe.swift
//  Tusker
//
//  Created by Shadowfacts on 2/19/23.
//  Copyright © 2023 Shadowfacts. All rights reserved.
//

import Foundation

/*
 Copied from https://github.com/ChimeHQ/ConcurrencyPlus/blob/fe3b3fd5436b196d8c5211ab2cc4b69fc35524fe/Sources/ConcurrencyPlus/MainActor%2BUnsafe.swift
 
 Copyright (c) 2022, Chime
 All rights reserved.

 Redistribution and use in source and binary forms, with or without
 modification, are permitted provided that the following conditions are met:

 1. Redistributions of source code must retain the above copyright notice, this
    list of conditions and the following disclaimer.

 2. Redistributions in binary form must reproduce the above copyright notice,
    this list of conditions and the following disclaimer in the documentation
    and/or other materials provided with the distribution.

 3. Neither the name of the copyright holder nor the names of its
    contributors may be used to endorse or promote products derived from
    this software without specific prior written permission.

 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
 FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
 SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
 CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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 OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

public extension MainActor {
    /// Execute the given body closure on the main actor without enforcing MainActor isolation.
    ///
    /// 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.
    ///
    /// It will crash if run on any non-main thread.
    @MainActor(unsafe)
    static func runUnsafely<T>(_ body: @MainActor () throws -> T) rethrows -> T {
        dispatchPrecondition(condition: .onQueue(.main))

        return try body()
    }
}
