Swift wait until function is done. Sep 23, 2018 · Async/await in Swift unit tests.
Swift wait until function is done. Is it possible to set some sort of return statement to make a function wait to continue until after each firebase function is done loading? This is the big function that calls various small Sep 5, 2016 · Look. Sep 23, 2018 · Async/await in Swift unit tests. May 11, 2023 · Wait until Task is finished without await - Using Swift - Swift Forums. This does not enforce any order, but will ensure both have completed before moving on. Is there a way to force it so it doesn't continue until the "getVIN"-function is finished? Jun 15, 2022 · var testData: String = "test". func1(). let waitingView = showWaitingView() // present something so that the user knows some network request is in progress. Nov 2, 2021 · Rewriting the above code example by making use of async-await explains best what structured concurrency does: do { // 1. You don't specify if the saving is local or to the network (which brings up other issues). StringBuffer any = new StringBuffer(); public synchronized boolean waitTillChange() {. Though I am making it wait by time (seconds). if seconds < 1 then. 4, is it possible to pause execution of the function until after some other stuff happens, then return true? I tried using a DispatchGroup and a DispatchSemaphore, but these options seems to block the main thread from proceeding, so any of the work I need to do on the main thread will be blocked and we'll get a deadlock. func checkAvailability(callback: @escaping (Bool) -> Void) {. It doesn't matter in which order the first two functions complete. Asking for help, clarification, or responding to other answers. static func main() async {. Sep 21, 2021 · This is a pretty basic question, I’m just asking if it’s possible to wait until you receive anything from the remotefunction you invoke. animateWithDuration(0. main that happens somewhere during the Task's execution will deadlock. Jan 18, 2018 at 21:22. I want my run function to be blocked and not exit until receiving the completionHandler callback. now it is being send async. WaitUntil can only be used with a yield statement in coroutines. Find("GameObjectScript1IsAttachedTo"); Mar 30, 2021 · Your third function depends on data from the first two, but the first two are independent. Jan 5, 2023 · Here's a simplified version of my code: // Call multiple Apis one after the other. With callbacks, the tests used to work if everything under the hood was replaced with synchronous calls but here it looks like i am Oct 3, 2022 · Uploading images and submitting data is 2 difference actions: User select images, after that app will upload them automatically. And stepThree AFTER stepTwo is done. Consider not calling an async in func2, but rather pass the resolved result of func1 to func2 as a parameter. An async method like Alamofire's request method takes a completion block, a block of code that should be run when the work is finished. doWhile does what you want, but your attempt goes into an infinite loop because you passed a function that always returns true. The Swift defer statement is useful for cases where we need something done — no matter what — before exiting the scope. In the test view controller, I have a huge Begin button, which when pressed initiates a sequence of code, as follows: @IBAction func test(_ sender: Any) {. You do need to consider that one or more of the network operations may fail. Feb 19, 2015 · I have to function for adding two sprites and moving, called Space1 and Space2. a function that starts some slow operation, but returns immediately to let current thread carry on; but the completion block will be called when the slow asynchronous task is done). The only difference is the way the function is called. I want my main game function (called when i press "Start Game" button) to call 2 functions in loop, unless the game end condition is true. But actually the output is. now() + 1) { performTask() } Jul 8, 2015 · Im looking for a solution for to some how make the init method wait until the fields are loaded. I want to wait until some task is done without having to make the function async. all to wait for the two tasks to complete. return "Time exceeded". so using await initPlatformState() getData will be executed until the process inside @KarlBateman I think you're confused. WhenAll(task1, task2); The main difference between Task. Jan 8, 2014 · Wait until function is complete. Jan 25, 2019 · All my work works perfectly with my API, the "self. The standard behavior is for R to wait for a line to be completed before moving on to the next line. Concurrency in Swift means allowing multiple pieces of code to run at the same time. import Foundation. asyncAfter(deadline: . let request = URLRequest(). asynchronous. User can tap Submit button whenever they like, even when images being uploaded, app has to wait for uploading task finish before submit other data. Converting your async system into a synchronous system (even in a hackish way that blocks the main thread) is a more advanced topic than the one you're avoiding (you'll need a DispatchGroup, for example, which is much more complicated than async). Instead of making 'x' a boolean, you can make it a Completer. Jun 20, 2018 · In my project I am loading various players from my database before entering my gamescene. If None (the default), wait until all awaitables are done or canceled. Using Swift. sleep() anymore. One could imagine a technique to avoid dealocks: only allow sync functions to wait for an async one when they are started from special threads: threads that If you want to use the completion block at the end of the animation, you should use constructs with the delay and options arguments as well. Replace x = true by x. swift. wait_until causes the current thread to block until the condition variable is notified, the given time point has been reached, or a spurious wakeup occurs. the value is still nil. signal() sema. unlock() and blocks on *this. I need to make Space1 move Right to Left, after Space 1 is finished the moving. then(func2) Which would allow you to define func2 as const func2 = result => {console. There's a way to do this by the func performing the task returning the Task and allows a test to await the value. You can use a DispatchGroup to execute the third function once the first two are complete. public bool isDone; Script1 script1Ref; public IEnumerator Start() {. Simply put, the Swift defer statement provides good Feb 20, 2018 · Wait until NSURLConnection sendAsynchronousRequest is finished. Assume the function is well broken down and just takes long. Apr 10, 2021 · When it reaches 0, I want it to return that it reached 0 so that the script can do a certain thing. future; // continue with executing this func. doWhile(() async => !await fetchResults()); to wait until it returns true. let y = 0. it just Dec 10, 2015 · When Code B is done it should notify you (success or failure) and Code A will act on that response. async function task1(input){. Aug 9, 2020 · 1. 0. engine is the initiated JavaScriptCore context where the JS runs. complete() and x = false by x = Completer() The function you wrote will become something like this: var x = Completer(); someFunction() async {. Sep 27, 2013 · 1. Request. // Handle all result scenarios. I am writing an application which tests your ability in Classical Greek. 5, the asynchronous functions allow asynchronous code to be written as if it were synchronous. RemoteFunction rem. Ok maybe this one should solve your problem. If they don’t make it in (distance/speed) seconds, I CFrame their humanoid root part to the position. I've read about time_dispatch and importing the darwin library, bu Feb 6, 2019 · I am trying to make some wrapper functions to handle some asynchronous BLE CoreBluetooth calls synchronously using closures. Aug 25, 2023 · Swift’s tasks use cooperative cancellation, which means that although we can tell a task to stop work, the task itself is free to completely ignore that instruction and carry on for as long as Jul 9, 2020 · The new View i am getting sent to afterwards is dependent on a cached variable. Asynchronous code is essential to providing a good user experience, but can at times be really tricky to write, debug and especially test. Jun 16, 2017 · The quickest way to make this work using ES6 would be just to use a for. This process involves setting an initial value for each stored property on that instance and performing any other setup or initialization that’s required before the new instance is ready for use. In the IEnumerator doIt() I am making the code wait between each step. while wait(1) do. 1) Atomically calls lock. It adds support for async/await to Swift, which will allow us to make asynchronous calls without using callbacks. I am not experienced with threads, but i think the machine continues on the main thread while another thread does the "getVIN"-function. func fetchData() async -> String {. isHidden = true. But since you need some post-processing, you'd want to chain a then which allows you to alter the resolved value. 25, options: UIViewAnimationOptions. Dec 6, 2022 · But this is an inherently unstable situation, as the resources used by fetchThing cannot be recovered until it finishes. Coupon class relevant properties: var webData: NSMutableData? Coupon class relevant methods: self. – Gregor Thomas. Oct 24, 2019 · I know the axios calls worked because I can see they updated in the database, but I need for function1() to wait for all of the axios calls in function2() to finish before running the reload in function3(). 82. map(p => p. Clicking each will call the same calculate() function. To use the async/await syntax introduced in Swift 5. e. I try to create semaphore and wait until sending a signal to semaphore to continue but it doesn't work(I'm not sure if i do it correct or not), then i saw a question in Stackoverflow, answer was creating a completion handler like that Jul 9, 2014 · In my opinion, deferreds/promises (as you have mentionned) is the way to go, rather than using timeouts. owner. Feb 3, 2022 · I think I found a way to do it by creating a DispatchGroup, calling dispatchGroup. all to wait for an array of promises to resolve and then act on those. Mar 14, 2011 · Each approach has its own way of waiting until the task/thread has completed. // body. var publisher1 = PassthroughSubject<Bool, Never>() So as you figured what is happening here is that the function returns before the completion handler gets called. yield return new WaitUntil(()=>conditionIsMet); in Coroutine. According to the proposal on GitHub, the benefits include: “- Better performance for asynchronous code. // prepare request however your app requires. Aug 20, 2022 · If I run, from the main thread, a sync function that blocks until a Task ends, then any @MainActor or DispatchQueue. CurveLinear, animations: {. wait() is suggested and I wonder if its better than: bool done = false; // returning true at the end, modifies Often there is a need for the program to wait for a function to complete its work. You give a function a name that identifies what it does, and this name is used to “call” the function to perform its task when needed. await f() sema. When the delegate finally evaluates to true, the coroutine will proceed Jul 23, 2016 · 0. Jul 26, 2023 · The syntax of the asyncio. Try it. I have a function that needs to only be executed once at time. Supplied delegate will be executed each frame after script MonoBehaviour. wait(1) until message In the following code, how do I wait until the animation is done before moving on? I want the code to pulse "Sending" twice and "Sent" once, but it goes straight to "Sent", as far as I can tell". This tutorial will help you learn all three methods, starting from using callback functions. label1. Using Promise object. Mar 18, 2019 · This means that ret value may be empty when it gets put on the main queue. So you now have the following options to call your async code: doSomeSyncWork() Task {. Mar 2, 2018 · // this function needs to return a simple string function something() { var conditionOk = false; var jobWillBeDoneInNMiliseconds = Math. two ways to solve this, both use Grand Central Dispatch (which is similar in Swift and Objective C): . Jan 14, 2014 · 2. CurveEaseIn, animations: {. Code below shows how to wait for all the promises to resolve and then deal with the results once they are all ready (as that seemed to be the objective of the question); Also for illustrative purposes, it shows output during execution (end finishes before middle). Suspends the coroutine execution until the supplied delegate evaluates to true. (I'm not crazy about changing a testable class to suit the test (returning the Task ), but it allows to test async without NSPredicate or setting some How do i add a delay in Xcode? self. Fetch images method returns // 3. It's fundamental to how iOS works. Apr 29, 2020 at 5:35. Mar 22, 2021 · 2. data, "test") // fail. Let there be a one-threaded programm, which calls a large functionLarge(), which needs to finish before the next codeline in the callers main Function. Example: (Client Side) local rem = script. To wait for the function to complete, we can use await: Both answers didn't mention the awaitable Task. Jul 5, 2021 · To handle the asynchronous nature of JavaScript executions, you can use one of the three available methods to wait for a function to finish: Using callback functions. There are four buttons. I've put a simple example. sleep(timeInMiliseconds) to pause the currently executing thread. end. I want it to wait until a certain condition is met. After this, you can wait for isDone to be true every frame. value. The problem is I go to various places to load different variables. func selectSQL(id: Int) {. Could you say more about why you think you need to add in a delay? Jul 21, 2015 · Swift - Wait until a Function is Completed. push(asyncResult) } return allAsyncResults } Apr 29, 2020 · as your initPlatformState method is async so if you add await where you are calling (in _getData method) then until that function's each line is not executed next line of _getData will not exicuted. main. enter () right before kicking off each Task, calling dispatchGroup. Jan 2, 2021 · A specific queue has an asyncAfter(deadline:, execute:) interface that will execute the code block execute after a specific deadline. – omegahelix. Is that possible? var data: Data { return task!. Countdown. I want the user's turn function to wait until user presses one of four buttons and then I can do some actions based on what button he press Feb 16, 2021 · func finishWorking(workComplete: Bool) {. In this answer . Call the resize method let resizedImages = try await resizeImages( images) // 4. WhenAll is that the former will block (similar to using Wait on a single task) while the latter will not and can be awaited, yielding control back to the caller until all tasks finish. You can use Thread. Oct 16, 2021 · It is intentional that Swift Structured Concurrency does not define a mechanism allowing a synchronous function to invoke work on an actor and block until it is complete. catch(e => e)) part turns all rejections into resolved values, so Promise. Feb 21, 2017 · Hi I got problem I am trying to call function after another function is fully completed, I tried to do that using closures, but still it's not helping and app present new controller and after that I get response from function which performing login by making request to server. Then, Space2 will move Left to Right. Example: //1. It's also best to not use Thread. Jun 25, 2021 · In an earlier article, I introduced the Swift 5. – Viren V Varasadiya. Sep 22, 2015 · I just put together a Swift NSObject extension that would allow you to do this. pred can be optionally provided to detect spurious wakeup. isHidden = false. So my updateData function needs to wait until finishWorking delegate method where called to launch completion. then() . init() self. Wait (optionally with a timeout) Jun 27, 2022 · //proccessRequestSync is a synchronous Swift function that provides the callback that the JS will call. refreshable { } modifiers to fetch data asynchronously. i have the following code that will check a rest api if the user credentials are valid or not. GameObject s1Obj = GameObject. // has more functions that do other stuff. timeout. The code produces no errors. It uses a delay function to allow you to wait until certain conditions are met or you cancel it. Chop Vegetables by Using Async/Await Syntax. Apr 20, 2015 · Thanks for contributing an answer to Stack Overflow! Please be sure to answer the question. Future. all still waits for everything to finish whether individual functions resolve or reject, regardless of how long they take. selectSQL(id) //passes id to server and returns all other varibles. WhenAll:. Dec 18, 2015 · However my function to find my items requires a location from the user, so every time it runs the location is nil. 5 during WWDC 2021. For example: Hook up the button (or whatever is going to trigger this segue) to an @IBAction. I would like to have a deadline for the search() async function to provide a result, otherwise it should terminate and return ResultEnum. Since tests execute completely synchronously by default, we often have to either adapt our production code or write more complex test cases in order to test our asynchronous Oct 21, 2018 · Then in your Script2, you can make your Start function to be a coroutine or IEnumerator instead of a void function. Aug 20, 2019 · 2. updateData() {. Swift’s unified function syntax is flexible enough to express anything from a simple C-style function with no parameter names to a Sep 3, 2014 · Let me take a crack: A completion handler is a block of code used in conjunction with some asynchronous function (i. await first() second() Even though marking first function as async does not make any sense as there is no async work it does, but still it is possible I was expecting that even though the first function is being awaited, it will be called asynchronously. Note that each time you make a change you call the change () method that releases the wait. Let’s get started! Concurrency and CPU cores. flag = true. To do so, I demonstrated how to replace a common use case of Grand Central Dispatch (GCD) — switching from the main thread to a background thread and then back to the main thread — with an async/await implementation. – jamesdlin. await methodThatIsAsync() Aug 26, 2018 · 1. return new Promise((resolve, reject) => {. However, in Swift concurrency: Behind the scenes, runtime engineer Rokhini Prabhu states that. Wait for async function return value in swift. sex" is set and showed when I build the code. async function task2(input){. WaitAll and Task. I can make them move by 2 functions Move1() and Move2(); but they started the same time. Aug 14, 2021 · 989 1 12 30. Oct 17, 2021 · This code does work, but it has high possibilities to cause a lot of extreme bugs. Provide details and share your research! But avoid …. 0 I'd like to make it wait about 2 seconds. private var owner = Owner() func testRefresh() {. Nov 2, 2021 · Async await is part of the new structured concurrency changes that arrived in Swift 5. May 4, 2022 · There was one solution suggested here (@andy) involving injecting the Task. May 7, 2020 · Use await Promise. await Task. answerOne. Here's what I'm trying to: import Combine. Here is an example I have just written to demonstrate how you could do it using deferreds/promises. Jun 11, 2021 · let sema = DispatchSemaphore(value: 0) async {. Feb 10, 2018 · We can define an asynchronous function with the following syntax: private func raiseHand() async -> Bool { sleep(3) return true } The idea here is to include the async keyword alongside the return type since the call site will return (BOOL here) when complete if we use the new await keyword. random() * 10000); setTimeout(function() { // I need to do something here, but I don't know how long it takes conditionOk = true; }, jobWillBeDoneInNMiliseconds); // I need to stop right here until Suspends the current task until the given deadline within a tolerance. Javascript wait for function to finish. Feb 7, 2021 · 2. Wait-Job will then cause the script to wait until the task is completed before continuing. log(result); return result;} – 3limin4t0r. Description. isEnabled = false. self. alpha = 1. elsewhere, I call do_level(), and I want it to execute the first loop until it hits yield, at which point I want it to begin do_wave() and wait until do_wave() has finished completely before starting the next loop in do_level(). running = false. const myAsyncLoopFunction = async (array) => { const allAsyncResults = [] for (const item of array) { const asyncResult = await asyncFunction(item) allAsyncResults. But I'm still "locked" like I can't do nothing after this code because Swift don't want to wait. I tried the function async and sync but then, all my next code has to be under a function Thanks in advance Start-Job -Name Job1 -ScriptBlock { Remove-Appxpackage MyAppName } Wait-Job -Name Job1 Add-Appxpackage . Then, we’ll learn to use the async and await keywords to enforce concurrency. floor(Math. I want to do something like. finishWorking is triggered when a background task did finish at any time. audulus (Taylor Holliday) May 11, 2023, 5:31pm 1. asyncawait. R will wait till one statement is done before completing the next. I hope someone is able to hlep. doWhile(fetchResults); to wait until fetchResults() returns false, or use await Future. await x. \PathToNewVersion Start-Job will start a new job process that uninstalls the application. OnClientInvoke = function() wait(3) return "Pie" end) (Server Side) local rem = script. Call the method let images = try await fetchImages() // 2. function firstFunction() {. You should dispatch to main from within the callback, like so: func coordinateToString(lat: Double, long: Double, completion: @escaping (String) -> ()) {. The idea is that the function will call playtrial, wait until the variable WasItCorrect has a value (other than ""), reset WasItCorrect, and then repeat (for a total of 10 times). Google for "delegation design pattern ios". If this is the same thread you use to update your UI then the UI will be frozen during the sleep so it's best to keep all the UI stuff on its own thread. I used a loop for wait until flag changes to true to launch completion. Swift does not offer preemptive cancelation, so while we can easily solve the tactical issue of making sure that doSomethingElse eventually runs, if fetchThing might never finish in some reasonable timetable, you have deeper Feb 9, 2021 · The good news is, we can - the Swift team has proposed an addition to the Swift language that will allow us to do just that. wait() function is as follows: asyncio. alpha = 0. animateWithDuration(1. Sep 22, 2021 · 1. WaitUntil(()=>conditionIsMet); Initialization is the process of preparing an instance of a class, structure, or enumeration for use. Feb 23, 2022 · Check it out. In flutter, I could not use dart:cli, I implement by pattern . As I recall (and I may be recalling incorrectly) such an operation would require some scheduling mechanism that could block the calling thread on the actor's execution context. wait() This seems to work well enough. Text = seconds. I want it to wait for the resquest is finished and then return true or false. Nov 4, 2021 · print("second") Task {. Sometimes it is opposite: there is no need for a main program to wait. So what you want to do is pass an asynchronous callback to the checkAvailability function so it will callback once the completion handler is fired. await sampleFunc() The bare-minimum examples of initiating async calls apparently rely on wrapping it in something syncronous, but in Playrounds, using @Main errors that “attribute cannot be used in a module that contains top-level code” and offers a pointer to the sounce . change loadShows method to make it synchronous and use the same dispatch queue as completionHandler, then wrap the entire body of the method in a dispatch_async; this way the method call ends right away, but the completionHandler will be called after loadShows if finished, just like in a Jan 17, 2017 · WasItCorrect = "". Using async/await keywords. And I have a few View Controllers. Instead, execution continues until the line where photos is defined — at that point, the program needs the results from these asynchronous calls, so you write await to pause execution until all three photos finish Jan 19, 2015 · Updated answer. Calling Task. I've tried to make function1() and function2() async/await functions, both at the same time and then individually, but that did not work As discussed in Discover concurrency in SwiftUI, views can make use of the new . data. Jan 16, 2018 · Even practicing, you really can't avoid using asynchronous queries. Primitives like semaphores and condition variables are unsafe to use with Swift concurrency. // This is also the function with a callback that Swift will wait until the callback is called // self. 0 //delay self. This is a very simplified description, but it should give you an idea already how important concurrency in Swift is for the performance of your apps. seconds = seconds - 1. let geoCoder = CLGeocoder() let location = CLLocation(latitude: lat, longitude: long) Hi i have a beginner question, where i cant find a good solution for in Swift 3. In this tutorial, we’ll discuss what concurrency is and why it is useful. beginBtn. However, after plastral is done, the program seems to stop responding and does not allow any new input / button pressing. testData. However, if I call my run function multiple times in a loop, it does not wait for the completionHandler callback and calls Jun 14, 2021 · In Swift 5. Because the require of the framework, the checkUser function will be call by framework, and must be a sync function. // waiting for x to complete. countdownLabel. Mar 8, 2015 · Another option is to use Promise. 5 async/await syntax that lies at the heart of Swift’s new structured concurrency. 0, options: UIViewAnimationOptions. Feb 3, 2014 · For the second function, you can use async/await a function where you will await for the first function to complete before proceeding with the instructions. Parent. id = id. getJSON returns a promise (a read-only deferred), so you can listen to it. Here is an example of delaying a function call by 1 second without blocking the current thread: // Call performTask after a delay of 1 second DispatchQueue. let searchResult = await search() switch searchResult {. //do some other work. UIView. 3, delay: 0. Apr 20, 2015 · I have a function to get data with json and i append all the data to an array. Use await Future. if running == true then. // put here the code you would like to animate. What I want is for stepTwo to start running only AFTER stepOne is completely done. leave () at the end of the async function and then calling dispatchGroup. Wait for function to end in Swift. Is there a way that i can wait till a location is found then do the function? Notes - i have tried putting the find item function in the didupdatelocation, but that does not load the items when the user loads the app. wait () in the synchronous thread (which waits for all tasks to finish). I tried to simply run the the blocks asynchronously in the background, but then I get "attempting to use xxx while it is mutating" because I enumerate over the same arrays or Functions are self-contained chunks of code that perform a specific task. 0. All I can find online talking about await in async is teaching me how to "wait for a certain period of time", which is not what I want. of loop. whenComplete(), but when call checkUser the statement print(1) will be call and end the function without wait for getUser finish. Just lile. how to wait for the URLSession to finish before returning the result from a function in Swift Mar 7, 2024 · wait_until. Call task3. 0, delay: 0. Create a new function that returns a promise. Sep 21, 2015 · It freezes the UI until the network request is complete, which can be a very long wait if something goes wrong. task { } and . refresh() XCTAssertEqual(owner. 3. None of these function calls are marked with await because the code doesn’t suspend to wait for the function’s result. RemoteFunction local message = rem:InvokeClient(player) repeat task. Is it possible to wait until the fetch instruction has completed before executing the next code / instruction (just like how AJAX waiting works)? These functions are actually used to request the “privacy value” of a post from the Facebook Graph API. Update and before MonoBehaviour. Asynchronous Delay in swift. I dont care if the UI "sleeps". I'm trying to avoid a function to be called while it hasn't completed the last request. This function is called from a server script and if I could make it wait until the module script checked the position it Nov 16, 2021 · Swift’s new concurrency system also includes a set of continuation APIs that enable us to make other kinds of asynchronous code compatible with async/await, and while those APIs are primarily aimed at bridging the gap between our existing code and the new concurrency system, they can also be used as an alternative to XCTest’s expectations Dec 18, 2021 · ipad, playgrounds, asyncawait. The order functions resolve or reject in don't matter here since the . 2. } Jul 6, 2021 · Nowadays, we can enforce primitives for concurrency using the async and await keywords. LateUpdate. timeout: an optional number of seconds to wait before returning. The proposal is named SE-0296, and is available in the development snapshots of the Swift compiler toolchain. 1. If you don't want to change all your functions into async functions. Oct 16, 2016 · My specific problem is: I am having performance issues and want to run multiple blocks of code in parallel and wait to exit the function until all of the blocks complete. . For example, defer can be handy when cleanup actions are performed multiple times, like closing a file or locking a lock, before exiting the scope. You implement this initialization process by Nov 18, 2020 · Basically I have a function in my ModuleScript that moves the player and waits for them to get to the specified position. import PlaygroundSupport. One function is computer's turn, the other is user's turn. How to wait till other function is finished in javascript using wait / async? 1. Please give us more information and we can help you more, but options may include: Calling EndInvoke on the delegate, passing in the IAsyncResult returned by BeginInvoke. wait(aws, *, timeout=None, return_when=ALL_COMPLETED) Where: aws: an iterable of awaitable objects that you want to run concurrently. var task1 = DoWorkAsync(); var task2 = DoMoreWorkAsync(); await Task. qv zr uj yl gz ju oz bu lt fu
Swift wait until function is done. wait() function is as follows: asyncio.