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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        }

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