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How to use CachedDelegate class of Microsoft.Coyote.Specifications package

Best Coyote code snippet using Microsoft.Coyote.Specifications.CachedDelegate

Monitor.cs

Source:Monitor.cs

...65        internal Dictionary<Type, EventHandlerDeclaration> EventHandlers;66        /// <summary>67        /// Map from action names to cached action delegates.68        /// </summary>69        private readonly Dictionary<string, CachedDelegate> ActionMap;70        /// <summary>71        /// Set of currently ignored event types.72        /// </summary>73        private HashSet<Type> IgnoredEvents;74        /// <summary>75        /// A counter that increases in each step of the execution, as long as the monitor76        /// remains in a hot state. If the temperature reaches the specified limit, then77        /// a potential liveness bug has been found.78        /// </summary>79        private int LivenessTemperature;80        /// <summary>81        /// Gets the name of this monitor.82        /// </summary>83        internal string Name => this.GetType().FullName;84        /// <summary>85        /// Responsible for logging.86        /// </summary>87        private LogWriter LogWriter;88        /// <summary>89        /// The logger installed to the runtime.90        /// </summary>91        /// <remarks>92        /// See <see href="/coyote/concepts/actors/logging" >Logging</see> for more information.93        /// </remarks>94        protected ILogger Logger => this.LogWriter.Logger;95        /// <summary>96        /// Gets the current state.97        /// </summary>98        protected internal Type CurrentState99        {100            get => this.ActiveState?.GetType();101        }102        /// <summary>103        /// Gets the current state name.104        /// </summary>105        internal string CurrentStateName106        {107            get => NameResolver.GetQualifiedStateName(this.CurrentState);108        }109        /// <summary>110        /// Gets the current state name with temperature.111        /// </summary>112        private string CurrentStateNameWithTemperature113        {114            get115            {116                return this.CurrentStateName +117                    (this.IsInHotState() ? "[hot]" :118                    this.IsInColdState() ? "[cold]" :119                    string.Empty);120            }121        }122        /// <summary>123        /// User-defined hashed state of the monitor. Override to improve the124        /// accuracy of stateful techniques during testing.125        /// </summary>126        protected virtual int HashedState => 0;127        /// <summary>128        /// A pending transition object that has not been returned from ExecuteAction yet.129        /// </summary>130        private Transition PendingTransition;131        /// <summary>132        /// Initializes a new instance of the <see cref="Monitor"/> class.133        /// </summary>134        protected Monitor()135            : base()136        {137            this.ActionMap = new Dictionary<string, CachedDelegate>();138            this.LivenessTemperature = 0;139        }140        /// <summary>141        /// Initializes this monitor.142        /// </summary>143        internal void Initialize(Configuration configuration, CoyoteRuntime runtime, LogWriter logWriter)144        {145            this.Configuration = configuration;146            this.Runtime = runtime;147            this.LogWriter = logWriter;148        }149        /// <summary>150        /// Raises the specified <see cref="Event"/> at the end of the current action.151        /// </summary>152        /// <remarks>153        /// This event is not handled until the action that calls this method returns control back154        /// to the Coyote runtime.  It is handled before any other events are dequeued from the inbox.155        /// Only one of the following can be called per action:156        /// <see cref="RaiseEvent"/>, <see cref="RaiseGotoStateEvent{T}"/>.157        /// An Assert is raised if you accidentally try and do two of these operations in a single action.158        /// </remarks>159        /// <param name="e">The event to raise.</param>160        protected void RaiseEvent(Event e)161        {162            this.Assert(e != null, "{0} is raising a null event.", this.Name);163            this.CheckDanglingTransition();164            this.PendingTransition = new Transition(Transition.Type.Raise, default, e);165        }166        /// <summary>167        /// Raise a special event that performs a goto state operation at the end of the current action.168        /// </summary>169        /// <remarks>170        /// Goto state pops the current <see cref="State"/> and pushes the specified <see cref="State"/> on the active state stack.171        ///172        /// This is shorthand for the following code:173        /// <code>174        /// class Event E { }175        /// [OnEventGotoState(typeof(E), typeof(S))]176        /// this.RaiseEvent(new E());177        /// </code>178        /// This event is not handled until the action that calls this method returns control back179        /// to the Coyote runtime.  It is handled before any other events are dequeued from the inbox.180        /// Only one of the following can be called per action:181        /// <see cref="RaiseEvent"/>, <see cref="RaiseGotoStateEvent{T}"/>.182        /// An Assert is raised if you accidentally try and do two of these operations in a single action.183        /// </remarks>184        /// <typeparam name="TState">Type of the state.</typeparam>185        protected void RaiseGotoStateEvent<TState>()186            where TState : State =>187            this.RaiseGotoStateEvent(typeof(TState));188        /// <summary>189        /// Raise a special event that performs a goto state operation at the end of the current action.190        /// </summary>191        /// <remarks>192        /// Goto state pops the current <see cref="State"/> and pushes the specified <see cref="State"/> on the active state stack.193        ///194        /// This is shorthand for the following code:195        /// <code>196        /// class Event E { }197        /// [OnEventGotoState(typeof(E), typeof(S))]198        /// this.RaiseEvent(new E());199        /// </code>200        /// This event is not handled until the action that calls this method returns control back201        /// to the Coyote runtime.  It is handled before any other events are dequeued from the inbox.202        /// Only one of the following can be called per action:203        /// <see cref="RaiseEvent"/>, <see cref="RaiseGotoStateEvent{T}"/>.204        /// An Assert is raised if you accidentally try and do two of these operations in a single action.205        /// </remarks>206        /// <param name="state">Type of the state.</param>207        protected void RaiseGotoStateEvent(Type state)208        {209            // If the state is not a state of the monitor, then report an error and exit.210            this.Assert(StateTypeMap[this.GetType()].Any(val => val.DeclaringType.Equals(state.DeclaringType) && val.Name.Equals(state.Name)),211                "{0} is trying to transition to non-existing state '{1}'.", this.Name, state.Name);212            this.CheckDanglingTransition();213            this.PendingTransition = new Transition(Transition.Type.Goto, state, default);214        }215        /// <summary>216        /// Checks if the assertion holds, and if not, throws an <see cref="AssertionFailureException"/> exception.217        /// </summary>218        protected void Assert(bool predicate)219        {220            if (!predicate)221            {222                this.LogMonitorError(this);223                this.Runtime.Assert(false);224            }225        }226        /// <summary>227        /// Checks if the assertion holds, and if not, throws an <see cref="AssertionFailureException"/> exception.228        /// </summary>229        protected void Assert(bool predicate, string s, object arg0)230        {231            if (!predicate)232            {233                this.LogMonitorError(this);234                this.Runtime.Assert(false, s, arg0);235            }236        }237        /// <summary>238        /// Checks if the assertion holds, and if not, throws an <see cref="AssertionFailureException"/> exception.239        /// </summary>240        protected void Assert(bool predicate, string s, object arg0, object arg1)241        {242            if (!predicate)243            {244                this.LogMonitorError(this);245                this.Runtime.Assert(false, s, arg0, arg1);246            }247        }248        /// <summary>249        /// Checks if the assertion holds, and if not, throws an <see cref="AssertionFailureException"/> exception.250        /// </summary>251        protected void Assert(bool predicate, string s, object arg0, object arg1, object arg2)252        {253            if (!predicate)254            {255                this.LogMonitorError(this);256                this.Runtime.Assert(false, s, arg0, arg1, arg2);257            }258        }259        /// <summary>260        /// Checks if the assertion holds, and if not, throws an <see cref="AssertionFailureException"/> exception.261        /// </summary>262        protected void Assert(bool predicate, string s, params object[] args)263        {264            if (!predicate)265            {266                this.LogMonitorError(this);267                this.Runtime.Assert(false, s, args);268            }269        }270        /// <summary>271        /// Notifies the monitor to handle the received event.272        /// </summary>273        internal void MonitorEvent(Event e, string senderName, string senderType, string senderState)274        {275            this.LogWriter.LogMonitorProcessEvent(this.Name, this.CurrentStateName, senderName, senderType, senderState, e);276            this.HandleEvent(e);277        }278        /// <summary>279        /// Handles the given event.280        /// </summary>281        private void HandleEvent(Event e)282        {283            // Do not process an ignored event.284            if (this.IsEventIgnoredInCurrentState(e))285            {286                return;287            }288            while (true)289            {290                if (this.ActiveState is null)291                {292                    // If the event cannot be handled, then report an error and exit.293                    this.Assert(false, "{0} received event '{1}' that cannot be handled.",294                        this.Name, e.GetType().FullName);295                }296                // If current state cannot handle the event then null the state.297                if (!this.CanHandleEvent(e.GetType()))298                {299                    this.LogExitedState(this);300                    this.ActiveState = null;301                    continue;302                }303                if (e.GetType() == typeof(GotoStateEvent))304                {305                    // Checks if the event is a goto state event.306                    Type targetState = (e as GotoStateEvent).State;307                    this.GotoState(targetState, null, e);308                }309                else if (this.EventHandlers.ContainsKey(e.GetType()))310                {311                    // Checks if the event can trigger an action.312                    var handler = this.EventHandlers[e.GetType()];313                    if (handler is ActionEventHandlerDeclaration action)314                    {315                        this.Do(action.Name, e);316                    }317                    else if (handler is GotoStateTransition transition)318                    {319                        this.GotoState(transition.TargetState, transition.Lambda, e);320                    }321                }322                else if (this.EventHandlers.ContainsKey(typeof(WildCardEvent)))323                {324                    // Checks if the event can trigger an action.325                    var handler = this.EventHandlers[typeof(WildCardEvent)];326                    if (handler is ActionEventHandlerDeclaration action)327                    {328                        this.Do(action.Name, e);329                    }330                    else if (handler is GotoStateTransition transition)331                    {332                        this.GotoState(transition.TargetState, transition.Lambda, e);333                    }334                }335                break;336            }337        }338        /// <summary>339        /// Checks if the specified event is ignored in the current monitor state.340        /// </summary>341        private bool IsEventIgnoredInCurrentState(Event e)342        {343            if (this.IgnoredEvents.Contains(e.GetType()) ||344                this.IgnoredEvents.Contains(typeof(WildCardEvent)))345            {346                return true;347            }348            return false;349        }350        /// <summary>351        /// Invokes an action.352        /// </summary>353#if !DEBUG354        [System.Diagnostics.DebuggerStepThrough]355#endif356        private void Do(string actionName, Event e)357        {358            CachedDelegate cachedAction = this.ActionMap[actionName];359            this.LogInvokedAction(this, cachedAction.MethodInfo, this.CurrentStateNameWithTemperature);360            this.ExecuteAction(cachedAction, e);361            this.ApplyEventHandlerTransition(this.PendingTransition);362        }363        /// <summary>364        /// Executes the on entry function of the current state.365        /// </summary>366#if !DEBUG367        [System.Diagnostics.DebuggerStepThrough]368#endif369        private void ExecuteCurrentStateOnEntry(Event e)370        {371            this.LogEnteredState(this);372            CachedDelegate entryAction = null;373            if (this.ActiveState.EntryAction != null)374            {375                entryAction = this.ActionMap[this.ActiveState.EntryAction];376            }377            // Invokes the entry action of the new state,378            // if there is one available.379            if (entryAction != null)380            {381                this.ExecuteAction(entryAction, e);382                this.ApplyEventHandlerTransition(this.PendingTransition);383            }384        }385        /// <summary>386        /// Executes the on exit function of the current state.387        /// </summary>388#if !DEBUG389        [System.Diagnostics.DebuggerStepThrough]390#endif391        private void ExecuteCurrentStateOnExit(string eventHandlerExitActionName, Event e)392        {393            this.LogExitedState(this);394            CachedDelegate exitAction = null;395            if (this.ActiveState.ExitAction != null)396            {397                exitAction = this.ActionMap[this.ActiveState.ExitAction];398            }399            // Invokes the exit action of the current state,400            // if there is one available.401            if (exitAction != null)402            {403                this.ExecuteAction(exitAction, e);404                Transition transition = this.PendingTransition;405                this.Assert(transition.TypeValue is Transition.Type.None,406                    "{0} has performed a '{1}' transition from an OnExit action.",407                    this.Name, transition.TypeValue);408                this.ApplyEventHandlerTransition(transition);409            }410            // Invokes the exit action of the event handler,411            // if there is one available.412            if (eventHandlerExitActionName != null)413            {414                CachedDelegate eventHandlerExitAction = this.ActionMap[eventHandlerExitActionName];415                this.ExecuteAction(eventHandlerExitAction, e);416                Transition transition = this.PendingTransition;417                this.Assert(transition.TypeValue is Transition.Type.None,418                    "{0} has performed a '{1}' transition from an OnExit action.",419                    this.Name, transition.TypeValue);420                this.ApplyEventHandlerTransition(transition);421            }422        }423        /// <summary>424        /// Executes the specified action.425        /// </summary>426#if !DEBUG427        [System.Diagnostics.DebuggerStepThrough]428#endif429        private void ExecuteAction(CachedDelegate cachedAction, Event e)430        {431            try432            {433                if (cachedAction.Handler is Action<Event> actionWithEvent)434                {435                    actionWithEvent(e);436                }437                else if (cachedAction.Handler is Action action)438                {439                    action();440                }441            }442            catch (Exception ex)443            {444                Exception innerException = ex;445                while (innerException is TargetInvocationException)446                {447                    innerException = innerException.InnerException;448                }449                if (innerException is AggregateException)450                {451                    innerException = innerException.InnerException;452                }453                if (innerException.GetBaseException() is System.Threading.ThreadInterruptedException threadEx)454                {455                    ExceptionDispatchInfo.Capture(threadEx).Throw();456                }457                else458                {459                    // Reports the unhandled exception.460                    this.ReportUnhandledException(innerException, cachedAction.MethodInfo.Name);461                }462            }463        }464        /// <summary>465        /// Applies the specified event handler transition.466        /// </summary>467        private void ApplyEventHandlerTransition(Transition transition)468        {469            if (transition.TypeValue != this.PendingTransition.TypeValue && this.PendingTransition.TypeValue != Transition.Type.None)470            {471                this.CheckDanglingTransition();472            }473            else if (transition.TypeValue is Transition.Type.Raise)474            {475                this.PendingTransition = default;476                var e = transition.Event;477                this.LogRaisedEvent(this, e);478                this.HandleEvent(e);479            }480            else if (transition.TypeValue is Transition.Type.Goto)481            {482                this.PendingTransition = default;483                var e = new GotoStateEvent(transition.State);484                this.LogRaisedEvent(this, e);485                this.HandleEvent(e);486            }487            else488            {489                this.PendingTransition = default;490            }491        }492        /// <summary>493        /// Notifies that a Transition was created but not returned to the Monitor.494        /// </summary>495        private void CheckDanglingTransition()496        {497            var transition = this.PendingTransition;498            this.PendingTransition = default;499            if (transition.TypeValue != Transition.Type.None)500            {501                string prefix = string.Format("{0} Transition created by {1} in state {2} was not processed",502                    transition.TypeValue, this.Name, this.CurrentStateName);503                string suffix = null;504                if (transition.State != null && transition.Event != null)505                {506                    suffix = string.Format(", state {0}, event {1}.", transition.State, transition.Event);507                }508                else if (transition.State != null)509                {510                    suffix = string.Format(", state {0}.", transition.State);511                }512                else if (transition.Event != null)513                {514                    suffix = string.Format(", event {0}.", transition.Event);515                }516                this.Assert(false, prefix + suffix);517            }518        }519        /// <summary>520        /// Performs a goto transition to the given state.521        /// </summary>522        private void GotoState(Type s, string onExitActionName, Event e)523        {524            // The monitor performs the on exit statements of the current state.525            this.ExecuteCurrentStateOnExit(onExitActionName, e);526            var nextState = StateMap[this.GetType()].First(val => val.GetType().Equals(s));527            this.ConfigureStateTransitions(nextState);528            // The monitor transitions to the new state.529            this.ActiveState = nextState;530            if (nextState.IsCold)531            {532                this.LivenessTemperature = 0;533            }534            // The monitor performs the on entry statements of the new state.535            this.ExecuteCurrentStateOnEntry(e);536        }537        /// <summary>538        /// Checks if the state can handle the given event type. An event539        /// can be handled if it is deferred, or leads to a transition or540        /// action binding.541        /// </summary>542        private bool CanHandleEvent(Type e)543        {544            if (this.EventHandlers.ContainsKey(e) ||545                this.EventHandlers.ContainsKey(typeof(WildCardEvent)) ||546                e == typeof(GotoStateEvent))547            {548                return true;549            }550            return false;551        }552        /// <summary>553        /// Checks the liveness temperature of the monitor and report a potential liveness bug if the554        /// the value exceeded the specified threshold.555        /// </summary>556        /// <remarks>557        /// This method only works if this is a liveness monitor.558        /// </remarks>559        internal bool IsLivenessThresholdExceeded(int threshold)560        {561            if (this.ActiveState.IsHot && threshold > 0)562            {563                this.LivenessTemperature++;564                if (this.LivenessTemperature > threshold)565                {566                    this.LogMonitorError(this);567                    return true;568                }569            }570            return false;571        }572        /// <summary>573        /// Returns true if the monitor is in a hot state.574        /// </summary>575        private bool IsInHotState() => this.ActiveState?.IsHot ?? false;576        /// <summary>577        /// Returns true if the monitor is in a hot state. Also outputs578        /// the name of the current state.579        /// </summary>580        internal bool IsInHotState(out string stateName)581        {582            stateName = this.CurrentStateName;583            return this.IsInHotState();584        }585        /// <summary>586        /// Returns true if the monitor is in a cold state.587        /// </summary>588        private bool IsInColdState() => this.ActiveState?.IsCold ?? false;589        /// <summary>590        /// Returns a nullable boolean indicating liveness temperature: true for hot, false for cold, else null.591        /// </summary>592        internal bool? GetHotState() => this.IsInHotState() ? true : this.IsInColdState() ? (bool?)false : null;593        /// <summary>594        /// Returns the hashed state of this monitor.595        /// </summary>596        internal int GetHashedState()597        {598            unchecked599            {600                var hash = 19;601                hash = (hash * 31) + this.GetType().GetHashCode();602                hash = (hash * 31) + this.CurrentState.GetHashCode();603                if (this.HashedState != 0)604                {605                    // Adds the user-defined hashed state.606                    hash = (hash * 31) + this.HashedState;607                }608                return hash;609            }610        }611        /// <summary>612        /// Returns a string that represents the current monitor.613        /// </summary>614        public override string ToString() => this.Name;615        /// <summary>616        /// Transitions to the start state, and executes the617        /// entry action, if there is any.618        /// </summary>619        internal void GotoStartState()620        {621            this.LogWriter.LogCreateMonitor(this.Name);622            if (this.Runtime.SchedulingPolicy is SchedulingPolicy.Interleaving623                && this.Configuration.IsActivityCoverageReported)624            {625                this.ReportActivityCoverage(this.Runtime.DefaultActorExecutionContext.CoverageInfo);626            }627            this.ExecuteCurrentStateOnEntry(DefaultEvent.Instance);628        }629        /// <summary>630        /// Initializes information about the states of the monitor.631        /// </summary>632        internal void InitializeStateInformation()633        {634            Type monitorType = this.GetType();635            // If this type has not already been setup in the MonitorActionMap, then we need to try and grab the ActionCacheLock636            // for this type.  First make sure we have one and only one lockable object for this type.637            object syncObject = ActionCacheLocks.GetOrAdd(monitorType, _ => new object());638            // Locking this syncObject ensures only one thread enters the initialization code to update639            // the ActionCache for this specific Actor type.640            lock (syncObject)641            {642                if (MonitorActionMap.ContainsKey(monitorType))643                {644                    // Note: even if we won the GetOrAdd, there is a tiny window of opportunity for another thread645                    // to slip in and lock the syncObject before us, so we have to check the ActionCache again646                    // here just in case.647                }648                else649                {650                    // Caches the actions declarations for this monitor type.651                    if (MonitorActionMap.TryAdd(monitorType, new Dictionary<string, MethodInfo>()))652                    {653                        // Caches the available state types for this monitor type.654                        if (StateTypeMap.TryAdd(monitorType, new HashSet<Type>()))655                        {656                            Type baseType = monitorType;657                            while (baseType != typeof(Monitor))658                            {659                                foreach (var s in baseType.GetNestedTypes(BindingFlags.Instance |660                                    BindingFlags.NonPublic | BindingFlags.Public |661                                    BindingFlags.DeclaredOnly))662                                {663                                    this.ExtractStateTypes(s);664                                }665                                baseType = baseType.BaseType;666                            }667                        }668                        // Caches the available state instances for this monitor type.669                        if (StateMap.TryAdd(monitorType, new HashSet<State>()))670                        {671                            foreach (var type in StateTypeMap[monitorType])672                            {673                                Type stateType = type;674                                if (type.IsAbstract)675                                {676                                    continue;677                                }678                                if (type.IsGenericType)679                                {680                                    // If the state type is generic (only possible if inherited by a681                                    // generic monitor declaration), then iterate through the base682                                    // monitor classes to identify the runtime generic type, and use683                                    // it to instantiate the runtime state type. This type can be684                                    // then used to create the state constructor.685                                    Type declaringType = this.GetType();686                                    while (!declaringType.IsGenericType ||687                                        !type.DeclaringType.FullName.Equals(declaringType.FullName.Substring(688                                        0, declaringType.FullName.IndexOf('['))))689                                    {690                                        declaringType = declaringType.BaseType;691                                    }692                                    if (declaringType.IsGenericType)693                                    {694                                        stateType = type.MakeGenericType(declaringType.GetGenericArguments());695                                    }696                                }697                                ConstructorInfo constructor = stateType.GetConstructor(Type.EmptyTypes);698                                var lambda = Expression.Lambda<Func<State>>(Expression.New(constructor)).Compile();699                                State state = lambda();700                                state.InitializeState();701                                this.Assert(702                                    (state.IsCold && !state.IsHot) ||703                                    (!state.IsCold && state.IsHot) ||704                                    (!state.IsCold && !state.IsHot),705                                    "State '{0}' of {1} cannot be both cold and hot.", type.FullName, this.Name);706                                StateMap[monitorType].Add(state);707                            }708                        }709                        foreach (var state in StateMap[monitorType])710                        {711                            if (state.EntryAction != null &&712                                !MonitorActionMap[monitorType].ContainsKey(state.EntryAction))713                            {714                                MonitorActionMap[monitorType].Add(715                                    state.EntryAction,716                                    this.GetActionWithName(state.EntryAction));717                            }718                            if (state.ExitAction != null &&719                                !MonitorActionMap[monitorType].ContainsKey(state.ExitAction))720                            {721                                MonitorActionMap[monitorType].Add(722                                    state.ExitAction,723                                    this.GetActionWithName(state.ExitAction));724                            }725                            foreach (var handler in state.EventHandlers.Values)726                            {727                                if (handler is ActionEventHandlerDeclaration action)728                                {729                                    if (!MonitorActionMap[monitorType].ContainsKey(action.Name))730                                    {731                                        MonitorActionMap[monitorType].Add(732                                            action.Name,733                                            this.GetActionWithName(action.Name));734                                    }735                                }736                                else if (handler is GotoStateTransition transition)737                                {738                                    if (transition.Lambda != null &&739                                        !MonitorActionMap[monitorType].ContainsKey(transition.Lambda))740                                    {741                                        MonitorActionMap[monitorType].Add(742                                            transition.Lambda,743                                            this.GetActionWithName(transition.Lambda));744                                    }745                                }746                            }747                        }748                    }749                }750            }751            // Populates the map of actions for this monitor instance.752            foreach (var kvp in MonitorActionMap[monitorType])753            {754                this.ActionMap.Add(kvp.Key, new CachedDelegate(kvp.Value, this));755            }756            var initialStates = StateMap[monitorType].Where(state => state.IsStart).ToList();757            this.Assert(initialStates.Count != 0, "{0} must declare a start state.", this.Name);758            this.Assert(initialStates.Count is 1, "{0} can not declare more than one start states.", this.Name);759            this.ConfigureStateTransitions(initialStates.Single());760            this.ActiveState = initialStates.Single();761            this.AssertStateValidity();762        }763        /// <summary>764        /// Processes a type, looking for monitor states.765        /// </summary>766        private void ExtractStateTypes(Type type)767        {768            Stack<Type> stack = new Stack<Type>();...

CachedDelegate.cs

Source:CachedDelegate.cs

...6{7    /// <summary>8    /// A monitor delegate that has been cached to optimize performance of invocations.9    /// </summary>10    internal class CachedDelegate11    {12        internal readonly MethodInfo MethodInfo;13        internal readonly Delegate Handler;14        internal CachedDelegate(MethodInfo method, object caller)15        {16            ParameterInfo[] parameters = method.GetParameters();17            if (parameters.Length is 1 && method.ReturnType == typeof(void))18            {19                this.Handler = Delegate.CreateDelegate(typeof(Action<Event>), caller, method);20            }21            else if (method.ReturnType == typeof(void))22            {23                this.Handler = Delegate.CreateDelegate(typeof(Action), caller, method);24            }25            else if (parameters.Length is 1 && method.ReturnType == typeof(Monitor.Transition))26            {27                this.Handler = Delegate.CreateDelegate(typeof(Func<Event, Monitor.Transition>), caller, method);28            }...

CachedDelegate

Using AI Code Generation

1using System;2using System.Collections.Generic;3using System.Linq;4using System.Text;5using System.Threading.Tasks;6using Microsoft.Coyote.Specifications;7using Microsoft.Coyote.Tasks;8{9    {10        public static void Main(string[] args)11        {12            CachedDelegate<int> cachedDelegate = new CachedDelegate<int>(() => 1);13            Task<int> task = new Task<int>(() => cachedDelegate.Invoke());14            task.Start();15            task.Wait();16            Console.WriteLine($"Result: {task.Result}");17        }18    }19}20using System;21using System.Collections.Generic;22using System.Linq;23using System.Text;24using System.Threading.Tasks;25using Microsoft.Coyote.Specifications;26using Microsoft.Coyote.Tasks;27{28    {29        public static void Main(string[] args)30        {31            CachedDelegate<int> cachedDelegate = new CachedDelegate<int>(() => 1);32            Task<int> task = new Task<int>(() => cachedDelegate.Invoke());33            task.Start();34            task.Wait();35            Console.WriteLine($"Result: {task.Result}");36        }37    }38}39using System;40using System.Collections.Generic;41using System.Linq;42using System.Text;43using System.Threading.Tasks;44using Microsoft.Coyote.Specifications;45using Microsoft.Coyote.Tasks;46{47    {48        public static void Main(string[] args)49        {50            CachedDelegate<int> cachedDelegate = new CachedDelegate<int>(() => 1);51            Task<int> task = new Task<int>(() => cachedDelegate.Invoke());52            task.Start();53            task.Wait();54            Console.WriteLine($"Result: {task.Result}");55        }56    }57}58using System;59using System.Collections.Generic;60using System.Linq;61using System.Text;62using System.Threading.Tasks;63using Microsoft.Coyote.Specifications;64using Microsoft.Coyote.Tasks;65{66    {67        public static void Main(string[] args)68        {

CachedDelegate

Using AI Code Generation

1using System;2using System.Threading.Tasks;3using Microsoft.Coyote;4using Microsoft.Coyote.Actors;5using Microsoft.Coyote.Specifications;6using Microsoft.Coyote.Tasks;7{8    {9        private static async Task Main(string[] args)10        {11            await Runtime.RunAsync(async () =>12            {13                var actor = Actor.CreateActorFromTask(async () =>14                {15                    while (true)16                    {17                        await Task.Delay(100);18                    }19                });20                var cachedDelegate = new CachedDelegate<bool>(actor, "IsCompletedSuccessfully");21                var result = cachedDelegate.Invoke();22                Console.WriteLine(result);23            });24        }25    }26}27using System;28using System.Threading.Tasks;29using Microsoft.Coyote;30using Microsoft.Coyote.Actors;31using Microsoft.Coyote.Tasks;32{33    {34        private static async Task Main(string[] args)35        {36            await Runtime.RunAsync(async () =>37            {38                var actor = Actor.CreateActorFromTask(async () =>39                {40                    while (true)41                    {42                        await Task.Delay(100);43                    }44                });45                var cachedDelegate = new CachedDelegate<bool>(actor, "IsCompletedSuccessfully");46                var result = cachedDelegate.Invoke();47                Console.WriteLine(result);48            });49        }50    }51}52The reason for this is that the CachedDelegate class uses the Task.GetAwaiter().GetResult() method to invoke the property. This method must be awaited, but the CachedDelegate class does not await it. This is

CachedDelegate

Using AI Code Generation

1using System;2using System.Collections.Generic;3using System.Linq;4using System.Threading.Tasks;5using Microsoft.Coyote;6using Microsoft.Coyote.Specifications;7using Microsoft.Coyote.Tasks;8{9    {10        public static async Task Main()11        {12            var cache = new CachedDelegate<object, object>(new Func<object, object>(x => x));13            var result = await cache.InvokeAsync(1);14            Console.WriteLine(result);15        }16    }17}18using System;19using System.Collections.Generic;20using System.Linq;21using System.Threading.Tasks;22using Microsoft.Coyote;23using Microsoft.Coyote.Specifications;24using Microsoft.Coyote.Tasks;25{26    {27        public static async Task Main()28        {29            var cache = new CachedDelegate<object, object>(new Func<object, object>(x => x));30            var result = await cache.InvokeAsync(1);31            Console.WriteLine(result);32        }33    }34}35using System;36using System.Collections.Generic;37using System.Linq;38using System.Threading.Tasks;39using Microsoft.Coyote;40using Microsoft.Coyote.Specifications;41using Microsoft.Coyote.Tasks;42{43    {44        public static async Task Main()45        {46            var cache = new CachedDelegate<object, object>(new Func<object, object>(x => x));47            var result = await cache.InvokeAsync(1);48            Console.WriteLine(result);49        }50    }51}52using System;53using System.Collections.Generic;54using System.Linq;55using System.Threading.Tasks;56using Microsoft.Coyote;57using Microsoft.Coyote.Specifications;58using Microsoft.Coyote.Tasks;59{60    {61        public static async Task Main()62        {63            var cache = new CachedDelegate<object, object>(new Func<object, object>(x => x));64            var result = await cache.InvokeAsync(1);65            Console.WriteLine(result);66        }67    }68}

CachedDelegate

Using AI Code Generation

1using Microsoft.Coyote.Specifications;2using System;3{4    {5        static void Main(string[] args)6        {7            var cachedDelegate = new CachedDelegate<int, int>(i => i * 2);8        }9    }10}11using Microsoft.Coyote.Specifications;12using System;13{14    {15        static void Main(string[] args)16        {17            var cachedDelegate = new CachedDelegate<int, int>(i => i * 2);18            var result = cachedDelegate.Invoke(

CachedDelegate

Using AI Code Generation

1using System;2using System.Threading.Tasks;3using Microsoft.Coyote.Specifications;4using Microsoft.Coyote.Tasks;5using Microsoft.Coyote.SystematicTesting;6using Microsoft.Coyote.Actors;7{8    {9        static void Main(string[] args)10        {11            var configuration = Configuration.Create().WithTestingIterations(10000);12            var test = new CachedDelegateTest();13            test.TestCachedDelegate(configuration);14        }15    }16    {17        public void TestCachedDelegate(Configuration configuration)18        {19            var runtime = RuntimeFactory.Create(configuration);20            runtime.RegisterMonitor(typeof(CachedDelegate));21            runtime.CreateActor(typeof(Actor1));22            runtime.Wait();23        }24    }25    {26        private CachedDelegate cachedDelegate;27        protected override Task OnInitializeAsync(Event initialEvent)28        {29            this.cachedDelegate = new CachedDelegate(this, "CachedDelegate");30            this.cachedDelegate.Start();31            return Task.CompletedTask;32        }33        protected override Task OnEventAsync(Event e)34        {35            if (e is CachedDelegateEvent)36            {37                this.cachedDelegate.Stop();38                this.cachedDelegate.Start();39            }40            return Task.CompletedTask;41        }42    }43    {44        private int count;45        [OnEntry(nameof(InitOnEntry))]46        [OnEventDoAction(typeof(CachedDelegateEvent), nameof(IncCount))]47        private class Init : MonitorState { }48        private void InitOnEntry()49        {50            this.count = 0;51        }52        private void IncCount()53        {54            this.count++;55        }56        protected override Task<bool> CheckHealthAsync(State state)57        {58            if (this.count > 1)59            {60                this.Assert(false, "CachedDelegate is not working as expected");61            }62            return Task.FromResult(true);63        }64    }65    { }66}67  at cachedDelegate.CachedDelegate.Assert(Boolean condition, String message) in 1.cs:line 8068  at cachedDelegate.CachedDelegate.CheckHealthAsync(State state) in 1.cs:line 7869  at Microsoft.Coyote.SystematicTesting.Runtime.MonitorRuntime.CheckMonitorsHealthAsync() in C:\Users\manas\Source

CachedDelegate

Using AI Code Generation

1using System;2using Microsoft.Coyote.Specifications;3{4    public static void Main()5    {6        int i = 1;7        CachedDelegate d = new CachedDelegate(() => i * 2);8        Console.WriteLine(d.Invoke());9        i = 2;10        Console.WriteLine(d.Invoke());11    }12}13using System;14using Microsoft.Coyote.Specifications;15{16    public static void Main()17    {18        CachedDelegate d = new CachedDelegate(() => GetTime());19        Console.WriteLine(d.Invoke());20        System.Threading.Thread.Sleep(1000);21        Console.WriteLine(d.Invoke());22    }23    private static DateTime GetTime()24    {25        return DateTime.UtcNow;26    }27}28using System;29using Microsoft.Coyote.Specifications;30{31    public static void Main()32    {33        CachedDelegate d = new CachedDelegate((int i) => GetTime(i));34        Console.WriteLine(d.Invoke(1));35        System.Threading.Thread.Sleep(1000);36        Console.WriteLine(d.Invoke(2));37        System.Threading.Thread.Sleep(1000);

CachedDelegate

Using AI Code Generation

1using System;2using System.Collections.Generic;3using System.Text;4using Microsoft.Coyote.Specifications;5{6    {7        public CachedDelegate(Func<int> f);8        public int Invoke();9    }10}11using System;12using System.Collections.Generic;13using System.Text;14using Microsoft.Coyote.Specifications;15{16    {17        public CachedDelegate(Func<int> f);18        public int Invoke();19    }20}21using System;22using System.Collections.Generic;23using System.Text;24using Microsoft.Coyote.Specifications;25{26    {27        public CachedDelegate(Func<int> f);28        public int Invoke();29    }30}31using System;32using System.Collections.Generic;33using System.Text;34using Microsoft.Coyote.Specifications;35{36    {37        public CachedDelegate(Func<int> f);38        public int Invoke();39    }40}41using System;42using System.Collections.Generic;43using System.Text;44using Microsoft.Coyote.Specifications;45{46    {47        public CachedDelegate(Func<int> f);48        public int Invoke();49    }50}51using System;52using System.Collections.Generic;53using System.Text;54using Microsoft.Coyote.Specifications;55{56    {57        public CachedDelegate(Func<int> f);58        public int Invoke();59    }60}61using System;62using System.Collections.Generic;63using System.Text;64using Microsoft.Coyote.Specifications;65{66    {67        public CachedDelegate(Func<int> f);68        public int Invoke();69    }70}

CachedDelegate

Using AI Code Generation

1using System;2using Microsoft.Coyote.Specifications;3using Microsoft.Coyote.Specifications.Tasks;4using System.Threading.Tasks;5{6    {7        static void Main(string[] args)8        {9            Console.WriteLine("Hello World!");10            var task = Task.Run(() => { Console.WriteLine("Hello World!"); });11            CachedDelegate d = new CachedDelegate(task);12            d.Invoke();13        }14    }15}

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