How to use OperationGroup method of Microsoft.Coyote.Runtime.OperationGroup class

Best Coyote code snippet using Microsoft.Coyote.Runtime.OperationGroup.OperationGroup

PrioritizationStrategy.cs

Source:PrioritizationStrategy.cs Github

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...18 {19 /// <summary>20 /// List of prioritized operation groups.21 /// </summary>22 private readonly List<OperationGroup> PrioritizedOperationGroups;23 /// <summary>24 /// Scheduling points in the current execution where a priority change should occur.25 /// </summary>26 private readonly HashSet<int> PriorityChangePoints;27 /// <summary>28 /// Number of potential priority change points in the current iteration.29 /// </summary>30 private int NumPriorityChangePoints;31 /// <summary>32 /// Max number of potential priority change points across all iterations.33 /// </summary>34 private int MaxPriorityChangePoints;35 /// <summary>36 /// Max number of priority changes per iteration.37 /// </summary>38 private readonly int MaxPriorityChanges;39 /// <summary>40 /// Initializes a new instance of the <see cref="PrioritizationStrategy"/> class.41 /// </summary>42 internal PrioritizationStrategy(Configuration configuration, IRandomValueGenerator generator, bool isFair)43 : base(configuration, generator, isFair)44 {45 this.PrioritizedOperationGroups = new List<OperationGroup>();46 this.PriorityChangePoints = new HashSet<int>();47 this.NumPriorityChangePoints = 0;48 this.MaxPriorityChangePoints = 0;49 this.MaxPriorityChanges = configuration.StrategyBound;50 }51 /// <inheritdoc/>52 internal override bool InitializeNextIteration(uint iteration)53 {54 // The first iteration has no knowledge of the execution, so only initialize from the second55 // iteration and onwards. Note that although we could initialize the first length based on a56 // heuristic, its not worth it, as the strategy will typically explore thousands of iterations,57 // plus its also interesting to explore a schedule with no forced priority switch points.58 if (iteration > 0)59 {60 this.PrioritizedOperationGroups.Clear();61 this.PriorityChangePoints.Clear();62 this.MaxPriorityChangePoints = Math.Max(63 this.MaxPriorityChangePoints, this.NumPriorityChangePoints);64 if (this.MaxPriorityChanges > 0)65 {66 var priorityChanges = this.RandomValueGenerator.Next(this.MaxPriorityChanges) + 1;67 var range = Enumerable.Range(0, this.MaxPriorityChangePoints);68 foreach (int point in this.Shuffle(range).Take(priorityChanges))69 {70 this.PriorityChangePoints.Add(point);71 }72 }73 this.DebugPrintPriorityChangePoints();74 }75 this.NumPriorityChangePoints = 0;76 return base.InitializeNextIteration(iteration);77 }78 /// <inheritdoc/>79 internal override bool NextOperation(IEnumerable<ControlledOperation> ops, ControlledOperation current,80 bool isYielding, out ControlledOperation next)81 {82 if (this.IsFair && this.StepCount >= this.Configuration.MaxUnfairSchedulingSteps)83 {84 return base.NextOperation(ops, current, isYielding, out next);85 }86 // Set the priority of any new operation groups.87 this.SetNewOperationGroupPriorities(ops, current);88 // Check if there are at least two operation groups that can be scheduled,89 // otherwise skip the priority checking and changing logic.90 if (ops.Select(op => op.Group).Distinct().Skip(1).Any())91 {92 // Try to change the priority of the highest priority operation group.93 // If the shared-state reduction is enabled, check if there is at least94 // one 'WRITE' operation, before trying to change the priority.95 if (!this.Configuration.IsSharedStateReductionEnabled ||96 ops.Any(op => op.LastSchedulingPoint is SchedulingPointType.Write))97 {98 this.TryPrioritizeNextOperationGroup(ops);99 }100 // Get the operations that belong to the highest priority group.101 OperationGroup nextGroup = this.GetOperationGroupWithHighestPriority(ops);102 ops = ops.Where(op => nextGroup.IsMember(op));103 }104 int idx = this.RandomValueGenerator.Next(ops.Count());105 next = ops.ElementAt(idx);106 return true;107 }108 /// <summary>109 /// Returns the operation group with the highest priority.110 /// </summary>111 private OperationGroup GetOperationGroupWithHighestPriority(IEnumerable<ControlledOperation> ops)112 {113 foreach (var group in this.PrioritizedOperationGroups)114 {115 if (ops.Any(op => op.Group == group))116 {117 return group;118 }119 }120 return null;121 }122 /// <summary>123 /// Sets a random priority to any new operation groups.124 /// </summary>125 private void SetNewOperationGroupPriorities(IEnumerable<ControlledOperation> ops, ControlledOperation current)126 {127 int count = this.PrioritizedOperationGroups.Count;128 if (count is 0)129 {130 this.PrioritizedOperationGroups.Add(current.Group);131 }132 // Randomize the priority of all new operation groups.133 foreach (var group in ops.Select(op => op.Group).Where(g => !this.PrioritizedOperationGroups.Contains(g)))134 {135 // Randomly choose a priority for this group.136 int index = this.RandomValueGenerator.Next(this.PrioritizedOperationGroups.Count) + 1;137 this.PrioritizedOperationGroups.Insert(index, group);138 Debug.WriteLine("[coyote::strategy] Assigned priority '{0}' for operation group '{1}'.", index, group);139 }140 if (this.PrioritizedOperationGroups.Count > count)141 {142 this.DebugPrintOperationPriorityList();143 }144 }145 /// <summary>146 /// Reduces the priority of highest priority operation group, if there is a priority147 /// change point installed on the current execution step.148 /// </summary>149 private bool TryPrioritizeNextOperationGroup(IEnumerable<ControlledOperation> ops)150 {151 OperationGroup group = null;152 if (this.PriorityChangePoints.Contains(this.NumPriorityChangePoints))153 {154 // This scheduling step was chosen as a priority change point.155 group = this.GetOperationGroupWithHighestPriority(ops);156 Debug.WriteLine("[coyote::strategy] Reduced the priority of operation group '{0}'.", group);157 }158 this.NumPriorityChangePoints++;159 if (group != null)160 {161 // Reduce the priority of the group by putting it in the end of the list.162 this.PrioritizedOperationGroups.Remove(group);163 this.PrioritizedOperationGroups.Add(group);164 return true;165 }166 return false;167 }168 /// <inheritdoc/>169 internal override string GetDescription() =>170 $"prioritization[fair:{this.IsFair},bound:{this.MaxPriorityChanges},seed:{this.RandomValueGenerator.Seed}]";171 /// <summary>172 /// Shuffles the specified range using the Fisher-Yates algorithm.173 /// </summary>174 /// <remarks>175 /// See https://en.wikipedia.org/wiki/Fisher%E2%80%93Yates_shuffle.176 /// </remarks>177 private IList<int> Shuffle(IEnumerable<int> range)178 {179 var result = new List<int>(range);180 for (int idx = result.Count - 1; idx >= 1; idx--)181 {182 int point = this.RandomValueGenerator.Next(result.Count);183 int temp = result[idx];184 result[idx] = result[point];185 result[point] = temp;186 }187 return result;188 }189 /// <inheritdoc/>190 internal override void Reset()191 {192 this.NumPriorityChangePoints = 0;193 this.PrioritizedOperationGroups.Clear();194 this.PriorityChangePoints.Clear();195 base.Reset();196 }197 /// <summary>198 /// Print the operation group priority list, if debug is enabled.199 /// </summary>200 private void DebugPrintOperationPriorityList()201 {202 if (Debug.IsEnabled)203 {204 Debug.WriteLine("[coyote::strategy] Updated operation group priority list: ");205 for (int idx = 0; idx < this.PrioritizedOperationGroups.Count; idx++)206 {207 var group = this.PrioritizedOperationGroups[idx];208 if (group.Any(m => m.Status is OperationStatus.Enabled))209 {210 Debug.WriteLine(" |_ [{0}] operation group with id '{1}' [enabled]", idx, group);211 }212 else if (group.Any(m => m.Status != OperationStatus.Completed))213 {214 Debug.WriteLine(" |_ [{0}] operation group with id '{1}'", idx, group);215 }216 }217 }218 }219 /// <summary>220 /// Print the priority change points, if debug is enabled.221 /// </summary>...

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ControlledOperation.cs

Source:ControlledOperation.cs Github

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...30 /// <summary>31 /// The group where this operation has membership. This can be used32 /// by the scheduler to optimize exploration.33 /// </summary>34 internal readonly OperationGroup Group;35 /// <summary>36 /// Queue of continuations that this operation must execute before it completes.37 /// </summary>38 private readonly Queue<Action> Continuations;39 /// <summary>40 /// Dependency that must get resolved before this operation can resume executing.41 /// </summary>42 private Func<bool> Dependency;43 /// <summary>44 /// Synchronization mechanism for controlling the execution of this operation.45 /// </summary>46 private ManualResetEventSlim SyncEvent;47 /// <summary>48 /// The type of the last encountered scheduling point.49 /// </summary>50 internal SchedulingPointType LastSchedulingPoint;51 /// <summary>52 /// A value that represents the hashed program state when this operation last executed.53 /// </summary>54 internal int LastHashedProgramState;55 /// <summary>56 /// A value that represents the shared state being accessed when this57 /// operation last executed, if there was any such state access.58 /// </summary>59 internal string LastAccessedSharedState;60 /// <summary>61 /// True if the source of this operation is uncontrolled, else false.62 /// </summary>63 internal bool IsSourceUncontrolled;64 /// <summary>65 /// True if the dependency is uncontrolled, else false.66 /// </summary>67 internal bool IsDependencyUncontrolled;68 /// <summary>69 /// True if this is the root operation, else false.70 /// </summary>71 internal bool IsRoot => this.Id is 0;72 /// <summary>73 /// True if this operation is currently paused, else false.74 /// </summary>75 internal bool IsPaused =>76 this.Status is OperationStatus.Paused ||77 this.Status is OperationStatus.PausedOnDelay ||78 this.Status is OperationStatus.PausedOnResource ||79 this.Status is OperationStatus.PausedOnReceive;80 /// <summary>81 /// Initializes a new instance of the <see cref="ControlledOperation"/> class.82 /// </summary>83 internal ControlledOperation(ulong operationId, string name, OperationGroup group, CoyoteRuntime runtime)84 {85 this.Runtime = runtime;86 this.Id = operationId;87 this.Name = name;88 this.Status = OperationStatus.None;89 this.Group = group ?? OperationGroup.Create(this);90 this.Continuations = new Queue<Action>();91 this.SyncEvent = new ManualResetEventSlim(false);92 this.LastSchedulingPoint = SchedulingPointType.Start;93 this.LastHashedProgramState = 0;94 this.LastAccessedSharedState = string.Empty;95 this.IsSourceUncontrolled = false;96 this.IsDependencyUncontrolled = false;97 // Register this operation with the runtime.98 this.Runtime.RegisterNewOperation(this);99 }100 /// <summary>101 /// Executes all continuations of this operation in order, if there are any.102 /// </summary>103 internal void ExecuteContinuations()...

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OperationGroup.cs

Source:OperationGroup.cs Github

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...8{9 /// <summary>10 /// Represents a group of controlled operations that can be scheduled together during testing.11 /// </summary>12 internal class OperationGroup : IEnumerable<ControlledOperation>, IEquatable<OperationGroup>13 {14 /// <summary>15 /// Provides access to the operation group associated with each async local context,16 /// or null if the current async local context has no associated group.17 /// </summary>18 private protected static readonly AsyncLocal<OperationGroup> AsyncLocalGroup =19 new AsyncLocal<OperationGroup>();20 /// <summary>21 /// The operation group associated with the current execution context, if any.22 /// </summary>23 internal static OperationGroup Current => AsyncLocalGroup.Value;24 /// <summary>25 /// The unique id of this group.26 /// </summary>27 internal readonly Guid Id;28 /// <summary>29 /// The controlled operation that owns this group.30 /// </summary>31 internal readonly ControlledOperation Owner;32 /// <summary>33 /// The controlled operations that are members of this group.34 /// </summary>35 private readonly HashSet<ControlledOperation> Members;36 /// <summary>37 /// Initializes a new instance of the <see cref="OperationGroup"/> class.38 /// </summary>39 private OperationGroup(Guid? id, ControlledOperation owner)40 {41 this.Id = id ?? Guid.NewGuid();42 this.Owner = owner;43 this.Members = new HashSet<ControlledOperation>();44 }45 /// <summary>46 /// Creates a new <see cref="OperationGroup"/> instance.47 /// </summary>48 internal static OperationGroup Create(ControlledOperation owner) => Create(null, owner);49 /// <summary>50 /// Creates a new <see cref="OperationGroup"/> instance with the specified id.51 /// </summary>52 internal static OperationGroup Create(Guid? id, ControlledOperation owner) => new OperationGroup(id, owner);53 /// <summary>54 /// Registers the specified operation as a member of this group.55 /// </summary>56 internal void RegisterMember(ControlledOperation member) => this.Members.Add(member);57 /// <summary>58 /// Returns an enumerator that iterates through the members of this group.59 /// </summary>60 public IEnumerator<ControlledOperation> GetEnumerator()61 {62 foreach (ControlledOperation op in this.Members)63 {64 yield return op;65 }66 }67 /// <summary>68 /// Returns an enumerator that iterates through the members of this group.69 /// </summary>70 IEnumerator IEnumerable.GetEnumerator() => this.GetEnumerator();71 /// <summary>72 /// Returns true if the specified operation is a member of this group, else false.73 /// </summary>74 internal bool IsMember(ControlledOperation operation) => this.Members.Contains(operation);75 /// <summary>76 /// Associates the specified operation group with the currently executing thread,77 /// allowing future retrieval in the same thread, as well as across threads that78 /// share the same asynchronous control flow.79 /// </summary>80 internal static void SetCurrent(OperationGroup group)81 {82 if (group != null)83 {84 AsyncLocalGroup.Value = group;85 }86 }87 /// <summary>88 /// Determines whether the specified object is equal to the current object.89 /// </summary>90 public override bool Equals(object obj)91 {92 if (obj is OperationGroup op)93 {94 return this.Id == op.Id;95 }96 return false;97 }98 /// <summary>99 /// Returns the hash code for this instance.100 /// </summary>101 public override int GetHashCode() => this.Id.GetHashCode();102 /// <summary>103 /// Returns a string that represents the current group id.104 /// </summary>105 public override string ToString() => this.Id.ToString();106 /// <summary>107 /// Indicates whether the specified <see cref="OperationGroup"/> is equal108 /// to the current <see cref="OperationGroup"/>.109 /// </summary>110 public bool Equals(OperationGroup other) => this.Equals((object)other);111 /// <summary>112 /// Indicates whether the specified <see cref="OperationGroup"/> is equal113 /// to the current <see cref="OperationGroup"/>.114 /// </summary>115 bool IEquatable<OperationGroup>.Equals(OperationGroup other) => this.Equals(other);116 /// <summary>117 /// Removes this operation group from the local context.118 /// </summary>119 internal static void RemoveFromContext()120 {121 AsyncLocalGroup.Value = null;122 }123 }124}...

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OperationGroup

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1using System;2using System.Threading.Tasks;3using Microsoft.Coyote;4using Microsoft.Coyote.Actors;5using Microsoft.Coyote.Runtime;6{7 {8 static void Main(string[] args)9 {10 RunAsync().Wait();11 }12 static async Task RunAsync()13 {14 var group = OperationGroup.Create();15 Task task1 = Task.Run(() => DoWork(group, 1000));16 Task task2 = Task.Run(() => DoWork(group, 5000));17 await Task.WhenAll(task1, task2);18 }19 static void DoWork(OperationGroup group, int milliseconds)20 {21 group.Perform(() =>22 {23 Console.WriteLine("Starting work...");24 Task.Delay(milliseconds).Wait();25 Console.WriteLine("Finished work.");26 });27 }28 }29}30using System;31using System.Threading.Tasks;32using Microsoft.Coyote;33using Microsoft.Coyote.Actors;34using Microsoft.Coyote.Runtime;35{36 {37 static void Main(string[] args)38 {39 RunAsync().Wait();40 }41 static async Task RunAsync()42 {43 var group = OperationGroup.Create();44 Task task1 = Task.Run(() => DoWork(group, 1000));45 Task task2 = Task.Run(() => DoWork(group, 5000));46 await Task.WhenAll(task1, task2);47 }48 static void DoWork(OperationGroup group, int milliseconds)49 {50 group.Perform(() =>51 {52 Console.WriteLine("Starting work...");53 Task.Delay(milliseconds).Wait();54 Console.WriteLine("Finished work.");55 });56 }57 }58}59using System;60using System.Threading.Tasks;61using Microsoft.Coyote;62using Microsoft.Coyote.Actors;63using Microsoft.Coyote.Runtime;

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OperationGroup

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1using System;2using System.Threading.Tasks;3using Microsoft.Coyote;4using Microsoft.Coyote.Actors;5using Microsoft.Coyote.Runtime;6{7 {8 public static void Main(string[] args)9 {10 var group = new OperationGroup();11 var task1 = Task.Run(async () =>12 {13 await group.RunAsync(async () =>14 {15 await Task.Delay(1000);16 Console.WriteLine("Task 1");17 });18 });19 var task2 = Task.Run(async () =>20 {21 await group.RunAsync(async () =>22 {23 await Task.Delay(1000);24 Console.WriteLine("Task 2");25 });26 });27 var task3 = Task.Run(async () =>28 {29 await group.RunAsync(async () =>30 {31 await Task.Delay(1000);32 Console.WriteLine("Task 3");33 });34 });35 Task.WaitAll(task1, task2, task3);36 }37 }38}39using System;40using System.Threading.Tasks;41using Microsoft.Coyote;42using Microsoft.Coyote.Actors;43using Microsoft.Coyote.Runtime;44{45 {46 public static void Main(string[] args)47 {48 var group = new OperationGroup();49 var task1 = Task.Run(async () =>50 {51 await group.RunAsync(async () =>52 {53 await Task.Delay(1000);54 Console.WriteLine("Task 1");55 });56 });57 var task2 = Task.Run(async () =>58 {59 await group.RunAsync(async () =>60 {61 await Task.Delay(1000);62 Console.WriteLine("Task 2");63 });64 });

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OperationGroup

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1using System;2using System.Threading.Tasks;3using Microsoft.Coyote;4using Microsoft.Coyote.Actors;5using Microsoft.Coyote.Runtime;6{7 {8 static void Main(string[] args)9 {10 Console.WriteLine("Hello World!");11 var options = Configuration.Create();12 options.WithVerbosityEnabled(Verbosity.Verbose);13 options.WithRandomSchedulingEnabled();14 options.WithMaxSchedulingSteps(1000);15 options.WithTestingIterations(1000);16 options.WithMaxFairSchedulingSteps(1000);17 options.WithMaxStepsFromBugFinding(1000);18 options.WithMaxUnfairSchedulingSteps(1000);19 options.WithMaxStepsFromAnyBugFinding(1000);20 options.WithMaxStepsFromLivelockFinding(1000);

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OperationGroup

Using AI Code Generation

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1using System;2using System.Threading.Tasks;3using Microsoft.Coyote;4using Microsoft.Coyote.Actors;5using Microsoft.Coyote.SystematicTesting;6{7 {8 public static void Main(string[] args)9 {10 var configuration = Configuration.Create();11 configuration.MaxSchedulingSteps = 100;12 configuration.MaxFairSchedulingSteps = 100;13 configuration.TestingIterations = 10;14 configuration.Verbose = 1;15 configuration.SchedulingStrategy = SchedulingStrategy.FairPCT;16 configuration.EnableCycleDetection = true;17 configuration.EnableDataRaceDetection = true;18 configuration.EnableHotStateDetection = true;19 configuration.EnableLivelockDetection = true;20 configuration.EnableDeadlockDetection = true;21 configuration.EnableOperationStackTraces = true;22 configuration.EnableActorTaskStackTraces = true;23 configuration.EnableBuggyActorStateTracking = true;

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OperationGroup

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1using System;2using System.Threading.Tasks;3using Microsoft.Coyote;4using Microsoft.Coyote.Actors;5using Microsoft.Coyote.Runtime;6using Microsoft.Coyote.Specifications;7{8 {9 [OnEventDoAction(typeof(UnitEvent), nameof(DoWork))]10 {11 }12 private void DoWork()13 {14 OperationGroup.Start("MyGrou

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OperationGroup

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1using System;2using System.Threading.Tasks;3using Microsoft.Coyote.Actors;4using Microsoft.Coyote.Runtime;5{6 {7 private static async Task Main(string[] args)8 {9 var runtime = RuntimeFactory.Create();10 await runtime.CreateActor(typeof(Actor1));11 await runtime.CreateActor(typeof(Actor2));12 await runtime.CreateActor(typeof(Actor3));13 await runtime.CreateActor(typeof(Actor4));14 await runtime.CreateActor(typeof(Actor5));15 await runtime.CreateActor(typeof(Actor6));16 await runtime.CreateActor(typeof(Actor7));17 await runtime.CreateActor(typeof(Actor8));18 await runtime.CreateActor(typeof(Actor9));19 await runtime.CreateActor(typeof(Actor10));20 await runtime.CreateActor(typeof(Actor11));21 await runtime.CreateActor(typeof(Actor12));22 await runtime.CreateActor(typeof(Actor13));23 await runtime.CreateActor(typeof(Actor14));24 await runtime.CreateActor(typeof(Actor15));25 await runtime.CreateActor(typeof(Actor16));26 await runtime.CreateActor(typeof(Actor17));27 await runtime.CreateActor(typeof(Actor18));28 await runtime.CreateActor(typeof(Actor19));29 await runtime.CreateActor(typeof(Actor20));30 await runtime.CreateActor(typeof(Actor21));31 await runtime.CreateActor(typeof(Actor22));32 await runtime.CreateActor(typeof(Actor23));33 await runtime.CreateActor(typeof(Actor24));34 await runtime.CreateActor(typeof(Actor25));35 await runtime.CreateActor(typeof(Actor26));36 await runtime.CreateActor(typeof(Actor27));37 await runtime.CreateActor(typeof(Actor28));38 await runtime.CreateActor(typeof(Actor29));39 await runtime.CreateActor(typeof(Actor30));40 await runtime.CreateActor(typeof(Actor31));41 await runtime.CreateActor(typeof(Actor32));42 await runtime.CreateActor(typeof(Actor33));43 await runtime.CreateActor(typeof(Actor34));44 await runtime.CreateActor(typeof(Actor35));45 await runtime.CreateActor(typeof(Actor36));46 await runtime.CreateActor(typeof(Actor37));47 await runtime.CreateActor(typeof(Actor38));48 await runtime.CreateActor(typeof(Actor39));49 await runtime.CreateActor(typeof(Actor40));50 await runtime.CreateActor(typeof(Actor41));51 await runtime.CreateActor(typeof(Actor42));52 await runtime.CreateActor(typeof(Actor43));53 await runtime.CreateActor(typeof(

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OperationGroup

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1using Microsoft.Coyote.Runtime;2{3 {4 static void Main(string[] args)5 {6 OperationGroup group = new OperationGroup();7 group.Start();8 group.Stop();9 }10 }11}12using Microsoft.Coyote.Runtime;13{14 {15 static void Main(string[] args)16 {17 OperationGroup group = new OperationGroup();18 group.Start();19 group.AddOperation(1);20 group.AddOperation(2);21 group.AddOperation(3);22 group.AddOperation(4);23 group.AddOperation(5);24 group.Stop();25 }26 }27}

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