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//
//  AppModuleEnvironmentConfiguration.swift
//

import SwiftUI

// MARK: AppDelegate

final class AppDelegate: NSObject, UIApplicationDelegate {
    func application(

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//
//  RestrictiveResourceLoader.swift
//

import Foundation

/// Simple example on how to restrict access to one or more "resources" (local storage, remote endpoint, etc).
/// Very similar to how one would use a semaphore for protected access.
final actor RestrictiveResourceLoader {
    private var isFetchingResource: Bool = false

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//
//  AsyncSemaphore.swift
//

import Foundation

/// An AsyncSemaphore suited for use in asynchronous contexts. Heavily inspired by https://github.com/groue/Semaphore.
public final class AsyncSemaphore: @unchecked Sendable {
    final class QueuedContinuation: @unchecked Sendable {
        enum State {

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//
//  ContinuationCreatingTaskSpawningCancelingResourceCache.swift
//

import Foundation

/// A concurrent and thread safe resource cache that spawns an unstructured Task to fetch a resource when the resource is first requested.
/// All Tasks requesting the resource will be suspended, and a Continuation will be created and stored for each Task.
/// Continuations and Tasks will then be resumed once the unstructured resource fetching Task has finished fetching the resource.
/// If a resource requesting Task is canceled while suspended and waiting for the unstructured resource fetching Task,

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import Foundation
import Atomics

/// A thread/concurrency context safe value using [Swift Atomics](https://github.com/apple/swift-atomics).
private final class AtomicCount: Sendable {
    private let protectedValue = ManagedAtomic<Int>(0)

    var value: Int {
        protectedValue.load(ordering: .acquiring)
    }

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//
//  TaskSpawningCancelingResourceCache.swift
//

import Foundation
import Atomics

/// A thread/concurrency context safe value using [Swift Atomics](https://github.com/apple/swift-atomics).
/// Heavily inspired by this WWDC 2023 video: [Beyond the basics of structured concurrency](https://developer.apple.com/videos/play/wwdc2023/10170/).
final class AtomicCount: Sendable {

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//
//  TaskSpawningResourceCache.swift
//

import Foundation

/// A concurrent and thread safe resource cache that spawns an unstructured Task to fetch a resource when the resource is first requested.
/// All Tasks requesting the resource will wait on the completion of the spawned unstructured resource fetching Task.
final actor TaskSpawningResourceCache {
    private let urlSession: URLSession

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//
//  ContinuationCreatingCancelingResourceCache.swift
//

import Foundation

/// A thread/concurrency context safe storage for Continuations using [NSLock](https://developer.apple.com/documentation/foundation/nslock).
/// Heavily inspired by this WWDC 2023 video: [Beyond the basics of structured concurrency](https://developer.apple.com/videos/play/wwdc2023/10170/).
///
/// NOTE: Be careful to always resume any suspended Continuations to prevent Continuation / Task leaks.

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//
//  ContinuationCreatingResourceCache.swift
//

import Foundation

/// A thread/concurrency context safe storage for Continuations using [NSLock](https://developer.apple.com/documentation/foundation/nslock).
/// Heavily inspired by this WWDC 2023 video: [Beyond the basics of structured concurrency](https://developer.apple.com/videos/play/wwdc2023/10170/).
///
/// NOTE: Be careful to always resume any suspended Continuations to prevent Continuation / Task leaks.

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//
//  StopRunLoopSource.swift
//

import Foundation

final class StopRunLoopSource: NSObject {
    // More on how to define custom run loop input sources: https://developer.apple.com/library/archive/documentation/Cocoa/Conceptual/Multithreading/RunLoopManagement/RunLoopManagement.html#//apple_ref/doc/uid/10000057i-CH16-SW3
    // And tips on how to terminate threads: https://developer.apple.com/library/archive/documentation/Cocoa/Conceptual/Multithreading/CreatingThreads/CreatingThreads.html#//apple_ref/doc/uid/10000057i-CH15-SW10