Test your AI Agents with the all-new Agent to Agent Testing Platform.Learn More

How to use AsyncLock method of Microsoft.Coyote.Samples.CoffeeMachineTasks.AsyncLock class

Best Coyote code snippet using Microsoft.Coyote.Samples.CoffeeMachineTasks.AsyncLock.AsyncLock

MockSensors.cs

Source:MockSensors.cs

...59    /// This is a mock implementation of the ISensor interface.60    /// </summary>61    internal class MockSensors : ISensors62    {63        private readonly AsyncLock Lock;64        private bool PowerOn;65        private bool WaterHeaterButton;66        private double WaterLevel;67        private double HopperLevel;68        private double WaterTemperature;69        private bool GrinderButton;70        private double PortaFilterCoffeeLevel;71        private bool ShotButton;72        private readonly bool DoorOpen;73        private readonly Generator RandomGenerator;74        private ControlledTimer WaterHeaterTimer;75        private ControlledTimer CoffeeLevelTimer;76        private ControlledTimer ShotTimer;77        public bool RunSlowly;78        private readonly LogWriter Log = LogWriter.Instance;79        public event EventHandler<double> WaterTemperatureChanged;80        public event EventHandler<bool> WaterHot;81        public event EventHandler<double> PortaFilterCoffeeLevelChanged;82        public event EventHandler<bool> HopperEmpty;83        public event EventHandler<bool> ShotComplete;84        public event EventHandler<bool> WaterEmpty;85        public MockSensors(bool runSlowly)86        {87            this.Lock = new AsyncLock();88            this.RunSlowly = runSlowly;89            this.RandomGenerator = Generator.Create();90            // The use of randomness here makes this mock a more interesting test as it will91            // make sure the coffee machine handles these values correctly.92            this.WaterLevel = this.RandomGenerator.NextInteger(100);93            this.HopperLevel = this.RandomGenerator.NextInteger(100);94            this.WaterHeaterButton = false;95            this.WaterTemperature = this.RandomGenerator.NextInteger(50) + 30;96            this.GrinderButton = false;97            this.PortaFilterCoffeeLevel = 0;98            this.ShotButton = false;99            this.DoorOpen = this.RandomGenerator.NextInteger(5) is 0;100            this.WaterHeaterTimer = new ControlledTimer("WaterHeaterTimer", TimeSpan.FromSeconds(0.1), this.MonitorWaterTemperature);101        }102        public Task TerminateAsync()103        {104            StopTimer(this.WaterHeaterTimer);105            StopTimer(this.CoffeeLevelTimer);106            StopTimer(this.ShotTimer);107            return Task.CompletedTask;108        }109        public async Task<bool> GetPowerSwitchAsync()110        {111            // to model real async behavior we insert a delay here.112            await Task.Delay(1);113            return this.PowerOn;114        }115        public async Task<double> GetWaterLevelAsync()116        {117            await Task.Delay(1);118            return this.WaterLevel;119        }120        public async Task<double> GetHopperLevelAsync()121        {122            await Task.Delay(1);123            return this.HopperLevel;124        }125        public async Task<double> GetWaterTemperatureAsync()126        {127            await Task.Delay(1);128            return this.WaterTemperature;129        }130        public async Task<double> GetPortaFilterCoffeeLevelAsync()131        {132            await Task.Delay(1);133            return this.PortaFilterCoffeeLevel;134        }135        public async Task<bool> GetReadDoorOpenAsync()136        {137            await Task.Delay(1);138            return this.DoorOpen;139        }140        public async Task SetPowerSwitchAsync(bool value)141        {142            await Task.Delay(1);143            // NOTE: you should not use C# locks that interact with Tasks (like Task.Run) because144            // it can result in deadlocks, instead use the Coyote AsyncLock as follows.145            using (await this.Lock.AcquireAsync())146            {147                this.PowerOn = value;148                if (!this.PowerOn)149                {150                    // Master power override then also turns everything else off for safety!151                    this.WaterHeaterButton = false;152                    this.GrinderButton = false;153                    this.ShotButton = false;154                    StopTimer(this.CoffeeLevelTimer);155                    this.CoffeeLevelTimer = null;156                    StopTimer(this.ShotTimer);157                    this.ShotTimer = null;158                }...

AsyncLock.cs

Source:AsyncLock.cs

...11    /// take control of it and explore various interleavings. This is possible12    /// because the lock is implemented on top of a TaskCompletionSource, which13    /// Coyote knows how to rewrite and control during testing.14    /// </summary>15    public class AsyncLock16    {17        /// <summary>18        /// Queue of tasks awaiting to acquire the lock.19        /// </summary>20        protected readonly Queue<TaskCompletionSource<object>> Awaiters;21        /// <summary>22        /// True if the lock has been acquired, else false.23        /// </summary>24        protected internal bool IsAcquired { get; protected set; }25        /// <summary>26        /// Initializes a new instance of the <see cref="AsyncLock"/> class.27        /// </summary>28        public AsyncLock()29        {30            this.Awaiters = new Queue<TaskCompletionSource<object>>();31            this.IsAcquired = false;32        }33        /// <summary>34        /// Tries to acquire the lock asynchronously, and returns a task that completes35        /// when the lock has been acquired. The returned task contains a releaser that36        /// releases the lock when disposed. This is not a reentrant operation.37        /// </summary>38        public virtual async Task<Releaser> AcquireAsync()39        {40            TaskCompletionSource<object> awaiter;41            lock (this.Awaiters)42            {43                if (this.IsAcquired)44                {45                    awaiter = new TaskCompletionSource<object>();46                    this.Awaiters.Enqueue(awaiter);47                }48                else49                {50                    this.IsAcquired = true;51                    awaiter = null;52                }53            }54            if (awaiter != null)55            {56                await awaiter.Task;57            }58            return new Releaser(this);59        }60        /// <summary>61        /// Releases the lock.62        /// </summary>63        protected virtual void Release()64        {65            TaskCompletionSource<object> awaiter = null;66            lock (this.Awaiters)67            {68                if (this.Awaiters.Count > 0)69                {70                    awaiter = this.Awaiters.Dequeue();71                }72                else73                {74                    this.IsAcquired = false;75                }76            }77            awaiter?.SetResult(null);78        }79        /// <summary>80        /// Releases the acquired <see cref="AsyncLock"/> when disposed.81        /// </summary>82        public struct Releaser : IDisposable83        {84            /// <summary>85            /// The acquired lock.86            /// </summary>87            private readonly AsyncLock AsyncLock;88            /// <summary>89            /// Initializes a new instance of the <see cref="Releaser"/> struct.90            /// </summary>91            internal Releaser(AsyncLock asyncLock)92            {93                this.AsyncLock = asyncLock;94            }95            /// <summary>96            /// Releases the acquired lock.97            /// </summary>98            public void Dispose() => this.AsyncLock?.Release();99        }100    }101}...

AsyncLock

Using AI Code Generation

1using System;2using System.Threading.Tasks;3using Microsoft.Coyote;4using Microsoft.Coyote.Samples.CoffeeMachineTasks;5using Microsoft.Coyote.Tasks;6{7    {8        private static AsyncLock _lock = new AsyncLock();9        public async Task MakeCoffeeAsync()10        {11            using (await _lock.LockAsync())12            {13                Console.WriteLine("Making coffee");14                await Task.Delay(500);15                Console.WriteLine("Coffee is ready");16            }17        }18    }19}20using System;21using System.Threading.Tasks;22using Microsoft.Coyote;23using Microsoft.Coyote.Samples.CoffeeMachineTasks;24using Microsoft.Coyote.Tasks;25{26    {27        private static AsyncLock _lock = new AsyncLock();28        public async Task MakeCoffeeAsync()29        {30            using (await _lock.LockAsync())31            {32                Console.WriteLine("Making coffee");33                await Task.Delay(500);34                Console.WriteLine("Coffee is ready");35            }36        }37    }38}

AsyncLock

Using AI Code Generation

1using Microsoft.Coyote.Samples.CoffeeMachineTasks;2using System;3using System.Threading.Tasks;4{5    {6        private readonly Task<IDisposable> releaser;7        private readonly Task<Releaser> releaserTask;8        public AsyncLock()9        {10            releaser = Task.FromResult((IDisposable)new Releaser(this));11            releaserTask = Task.FromResult(new Releaser(this));12        }13        public Task<IDisposable> LockAsync()14        {15            var wait = this.semaphore.WaitAsync();16                wait.ContinueWith((_, state) => (IDisposable)state,17                    releaser.Result, TaskScheduler.Default);18        }19        public Task<Releaser> LockAsyncTask()20        {21            var wait = this.semaphore.WaitAsync();22                wait.ContinueWith((_, state) => (Releaser)state,23                    releaserTask.Result, TaskScheduler.Default);24        }25        private readonly SemaphoreSlim semaphore = new SemaphoreSlim(1, 1);26        {27            private readonly AsyncLock toRelease;28            internal Releaser(AsyncLock toRelease) => this.toRelease = toRelease;29            public void Dispose() => toRelease.semaphore.Release();30        }31    }32}33using Microsoft.Coyote.Samples.CoffeeMachineTasks;34using System;35using System.Threading.Tasks;36{37    {38        private readonly Task<IDisposable> releaser;39        private readonly Task<Releaser> releaserTask;40        public AsyncLock()41        {42            releaser = Task.FromResult((IDisposable)new Releaser(this));43            releaserTask = Task.FromResult(new Releaser(this));44        }45        public Task<IDisposable> LockAsync()46        {47            var wait = this.semaphore.WaitAsync();48                wait.ContinueWith((_, state) => (IDisposable)state,49                    releaser.Result, TaskScheduler.Default);50        }51        public Task<Releaser> LockAsyncTask()52        {

AsyncLock

Using AI Code Generation

1using System;2using System.Threading.Tasks;3using Microsoft.Coyote.Samples.CoffeeMachineTasks;4{5    {6        static void Main(string[] args)7        {8            AsyncLock asyncLock = new AsyncLock();9            Task.Run(() => asyncLock.LockAsync());10            Task.Run(() => asyncLock.LockAsync());11            Task.Run(() => asyncLock.UnLockAsync());12            Task.Run(() => asyncLock.LockAsync());13            Task.Run(() => asyncLock.UnLockAsync());14            Task.Run(() => asyncLock.UnLockAsync());15            Console.ReadLine();16        }17    }18}19using System;20using System.Threading.Tasks;21using Microsoft.Coyote.Samples.CoffeeMachineTasks;22{23    {24        static void Main(string[] args)25        {26            AsyncLock asyncLock = new AsyncLock();27            Task.Run(() => asyncLock.LockAsync());28            Task.Run(() => asyncLock.LockAsync());29            Task.Run(() => asyncLock.UnLockAsync());30            Task.Run(() => asyncLock.LockAsync());31            Task.Run(() => asyncLock.UnLockAsync());32            Task.Run(() => asyncLock.UnLockAsync());33            Console.ReadLine();34        }35    }36}37using System;38using System.Threading.Tasks;39using Microsoft.Coyote.Samples.CoffeeMachineTasks;40{41    {42        static void Main(string[] args)43        {44            AsyncLock asyncLock = new AsyncLock();45            Task.Run(() => asyncLock.LockAsync());46            Task.Run(() => asyncLock.LockAsync());47            Task.Run(() => asyncLock.UnLockAsync());48            Task.Run(() => asyncLock.LockAsync());49            Task.Run(() => asyncLock.UnLockAsync());50            Task.Run(() => asyncLock.UnLockAsync());51            Console.ReadLine();52        }53    }54}55using System;56using System.Threading.Tasks;57using Microsoft.Coyote.Samples.CoffeeMachineTasks;58{59    {60        static void Main(string[] args

AsyncLock

Using AI Code Generation

1using System.Threading.Tasks;2using Microsoft.Coyote;3using Microsoft.Coyote.Actors;4using Microsoft.Coyote.Samples.CoffeeMachineTasks;5{6    {7        static async Task Main(string[] args)8        {9            var machine = new CoffeeMachineActor();10            machine.Start();11            await AsyncLock.LockAsync(machine, new CoffeeMachineActor.SetWaterLevelEvent(1));12            await AsyncLock.LockAsync(machine, new CoffeeMachineActor.SetWaterLevelEvent(2));13            await AsyncLock.LockAsync(machine, new CoffeeMachineActor.SetWaterLevelEvent(3));14            await AsyncLock.LockAsync(machine, new CoffeeMachineActor.SetWaterLevelEvent(4));15            await AsyncLock.LockAsync(machine, new CoffeeMachineActor.SetWaterLevelEvent(5));16            await AsyncLock.LockAsync(machine, new CoffeeMachineActor.SetWaterLevelEvent(6));17            await AsyncLock.LockAsync(machine, new CoffeeMachineActor.SetWaterLevelEvent(7));18            await AsyncLock.LockAsync(machine, new CoffeeMachineActor.SetWaterLevelEvent(8));19            await AsyncLock.LockAsync(machine, new CoffeeMachineActor.SetWaterLevelEvent(9));20            await AsyncLock.LockAsync(machine, new CoffeeMachineActor.SetWaterLevelEvent(10));21            await AsyncLock.LockAsync(machine, new CoffeeMachineActor.SetWaterLevelEvent(11));22            await AsyncLock.LockAsync(machine, new CoffeeMachineActor.SetWaterLevelEvent(12));23            await AsyncLock.LockAsync(machine, new CoffeeMachineActor.SetWaterLevelEvent(13));24            await AsyncLock.LockAsync(machine, new CoffeeMachineActor.SetWaterLevelEvent(14));25            await AsyncLock.LockAsync(machine, new CoffeeMachineActor.SetWaterLevelEvent(15));26            await AsyncLock.LockAsync(machine, new CoffeeMachineActor.SetWaterLevelEvent(16));27            await AsyncLock.LockAsync(machine, new CoffeeMachineActor.SetWaterLevelEvent(17));28            await AsyncLock.LockAsync(machine, new CoffeeMachineActor.SetWaterLevelEvent(18));29            await AsyncLock.LockAsync(machine, new CoffeeMachineActor.SetWaterLevelEvent(19));30            await AsyncLock.LockAsync(machine, new CoffeeMachineActor.SetWaterLevelEvent(20));31            await AsyncLock.LockAsync(machine, new CoffeeMachineActor.SetWaterLevelEvent(21));32            await AsyncLock.LockAsync(machine, new CoffeeMachineActor.SetWaterLevelEvent(22));33            await AsyncLock.LockAsync(machine, new CoffeeMachineActor.Set

AsyncLock

Using AI Code Generation

1using System;2using System.Threading.Tasks;3using Microsoft.Coyote.Samples.CoffeeMachineTasks;4{5    {6        static void Main(string[] args)7        {8            AsyncLock asyncLock = new AsyncLock();9            asyncLock.AsyncLockMethod();10            Console.WriteLine("Press any key to exit.");11            Console.ReadLine();12        }13    }14}15using System;16using System.Threading.Tasks;17using Microsoft.Coyote.Samples.CoffeeMachineTasks;18{19    {20        static void Main(string[] args)21        {22            AsyncLock asyncLock = new AsyncLock();23            asyncLock.AsyncLockMethod();24            Console.WriteLine("Press any key to exit.");25            Console.ReadLine();26        }27    }28}

AsyncLock

Using AI Code Generation

1using System;2using System.Threading.Tasks;3using Microsoft.Coyote.Samples.CoffeeMachineTasks;4{5    {6        private AsyncLock _lock = new AsyncLock();7        public int CoffeeLeft { get; private set; } = 20;8        public async Task MakeCoffee()9        {10            using (await _lock.LockAsync())11            {12                if (CoffeeLeft == 0)13                {14                    Console.WriteLine("Out of coffee!");15                    return;16                }17                CoffeeLeft--;18                Console.WriteLine("Coffee is ready!");19            }20        }21    }22}23using System;24using System.Threading.Tasks;25using Microsoft.Coyote.Samples.CoffeeMachineTasks;26{27    {28        private AsyncLock _lock = new AsyncLock();29        public int CoffeeLeft { get; private set; } = 20;30        public async Task MakeCoffee()31        {32            using (await _lock.LockAsync())33            {34                if (CoffeeLeft == 0)35                {36                    Console.WriteLine("Out of coffee!");37                    return;38                }39                CoffeeLeft--;40                Console.WriteLine("Coffee is ready!");41            }42        }43    }44}45using System;46using System.Threading.Tasks;47using Microsoft.Coyote.Samples.CoffeeMachineTasks;48{49    {50        private AsyncLock _lock = new AsyncLock();51        public int CoffeeLeft { get; private set; } = 20;52        public async Task MakeCoffee()53        {54            using (await _lock.LockAsync())55            {56                if (CoffeeLeft == 0)57                {58                    Console.WriteLine("Out of coffee!");59                    return;60                }61                CoffeeLeft--;62                Console.WriteLine("Coffee is ready!");63            }64        }65    }66}67using System;68using System.Threading.Tasks;

AsyncLock

Using AI Code Generation

1using System;2using Microsoft.Coyote.Samples.CoffeeMachineTasks;3using System.Threading.Tasks;4{5    {6        static void Main(string[] args)7        {8            AsyncLock asyncLock = new AsyncLock();9            asyncLock.Acquire();10            asyncLock.Release();11            Console.WriteLine("Hello World!");12        }13    }14}15using System;16using Microsoft.Coyote.Samples.CoffeeMachineTasks;17using System.Threading.Tasks;18{19    {20        static void Main(string[] args)21        {22            AsyncLock asyncLock = new AsyncLock();23            asyncLock.Acquire();24            asyncLock.Release();25            Console.WriteLine("Hello World!");26        }27    }28}29using System;30using Microsoft.Coyote.Samples.CoffeeMachineTasks;31using System.Threading.Tasks;32{33    {34        static void Main(string[] args)35        {36            AsyncLock asyncLock = new AsyncLock();37            asyncLock.Acquire();38            asyncLock.Release();39            Console.WriteLine("Hello World!");40        }41    }42}43using System;44using Microsoft.Coyote.Samples.CoffeeMachineTasks;45using System.Threading.Tasks;46{47    {48        static void Main(string[] args)49        {50            AsyncLock asyncLock = new AsyncLock();51            asyncLock.Acquire();52            asyncLock.Release();53            Console.WriteLine("Hello World!");54        }55    }56}57using System;58using Microsoft.Coyote.Samples.CoffeeMachineTasks;59using System.Threading.Tasks;60{61    {62        static void Main(string[] args)63        {64            AsyncLock asyncLock = new AsyncLock();65            asyncLock.Acquire();66            asyncLock.Release();67            Console.WriteLine("Hello World!");68        }69    }70}

AsyncLock

Using AI Code Generation

1using  System;2 using  System.Threading.Tasks;3 using  Microsoft.Coyote.Samples.CoffeeMachineTasks;4{5    {6         static   void   Main ( string [] args)7        {8             var  asyncLock =  new  AsyncLock();9             var  task = Task.Run(async  ()  =>10            {11                 using  (await asyncLock.LockAsync())12                {13                    Console.WriteLine( "Task 1 acquired lock" );14                    await Task.Delay(1000);15                    Console.WriteLine( "Task 1 released lock" );16                }17            });18             var  task2 = Task.Run(async  ()  =>19            {20                 using  (await asyncLock.LockAsync())21                {22                    Console.WriteLine( "Task 2 acquired lock" );23                    await Task.Delay(1000);24                    Console.WriteLine( "Task 2 released lock" );25                }26            });27            Task.WaitAll(task, task2);28        }29    }30}31using  System;32 using  System.Threading.Tasks;33 using  Microsoft.Coyote.Samples.CoffeeMachineTasks;34{35    {36         static   void   Main ( string [] args)37        {38             var  asyncLock =  new  AsyncLock();39             var  task = Task.Run(async  ()  =>40            {41                 using  (await asyncLock.LockAsync())42                {43                    Console.WriteLine( "Task 1 acquired lock" );44                    await Task.Delay(1000);45                    Console.WriteLine( "Task 1 released lock" );46                }47            });48             var  task2 = Task.Run(async  ()  =>49            {50                 using  (await asyncLock.LockAsync())51                {52                    Console.WriteLine( "Task 2 acquired lock" );53                    await Task.Delay(1000);54                    Console.WriteLine( "Task 2 released lock" );55                }56            });57            Task.WaitAll(task, task2);58        }59    }60}61using  System;62 using  System.Threading.Tasks;63 using  Microsoft.Coyote.Samples.CoffeeMachineTasks;64{65    {

AsyncLock

Using AI Code Generation

1using System.Threading.Tasks;2using System.Threading;3{4    {5        static void Main(string[] args)6        {7            MainAsync().Wait();8        }9        static async Task MainAsync()10        {11            AsyncLock asyncLock = new AsyncLock();12            var task1 = Task.Run(async () =>13            {14                using (await asyncLock.LockAsync())15                {16                    Console.WriteLine("Task 1");17                    await Task.Delay(2000);18                }19            });20            var task2 = Task.Run(async () =>21            {22                using (await asyncLock.LockAsync())23                {24                    Console.WriteLine("Task 2");25                    await Task.Delay(2000);26                }27            });28            await Task.WhenAll(task1, task2);29        }30    }31}32using System.Threading.Tasks;33using System.Threading;34{35    {36        static void Main(string[] args)37        {38            MainAsync().Wait();39        }40        static async Task MainAsync()41        {42            AsyncLock asyncLock = new AsyncLock();43            var task1 = Task.Run(async () =>44            {45                using (await asyncLock.LockAsync())46                {47                    Console.WriteLine("Task 1");48                    await Task.Delay(2000);49                }50            });51            var task2 = Task.Run(async () =>52            {53                using (await asyncLock.LockAsync())54                {55                    Console.WriteLine("Task 2");56                    await Task.Delay(2000);57                }58            });59            await Task.WhenAll(task1, task2);60        }61    }62}63using System.Threading.Tasks;64using System.Threading;65{66    {67        static void Main(string[] args)68        {69            MainAsync().Wait();70        }

Automation Testing Tutorials

Learn to execute automation testing from scratch with LambdaTest Learning Hub. Right from setting up the prerequisites to run your first automation test, to following best practices and diving deeper into advanced test scenarios. LambdaTest Learning Hubs compile a list of step-by-step guides to help you be proficient with different test automation frameworks i.e. Selenium, Cypress, TestNG etc.