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How to use Monitor class of Microsoft.Coyote.Rewriting.Types.Threading package

Best Coyote code snippet using Microsoft.Coyote.Rewriting.Types.Threading.Monitor

Monitor.cs

Source:Monitor.cs

...15    /// Provides methods for monitors that can be controlled during testing.16    /// </summary>17    /// <remarks>This type is intended for compiler use rather than use directly in code.</remarks>18    [System.ComponentModel.EditorBrowsable(System.ComponentModel.EditorBrowsableState.Never)]19    public static class Monitor20    {21        /// <summary>22        /// Acquires an exclusive lock on the specified object.23        /// </summary>24        public static void Enter(object obj)25        {26            var runtime = CoyoteRuntime.Current;27            if (runtime.SchedulingPolicy is SchedulingPolicy.Interleaving)28            {29                SynchronizedBlock.Lock(obj);30            }31            else32            {33                if (runtime.SchedulingPolicy is SchedulingPolicy.Fuzzing &&34                    runtime.TryGetExecutingOperation(out ControlledOperation current))35                {36                    runtime.DelayOperation(current);37                }38                SystemThreading.Monitor.Enter(obj);39            }40        }41        /// <summary>42        /// Acquires an exclusive lock on the specified object.43        /// </summary>44        public static void Enter(object obj, ref bool lockTaken)45        {46            var runtime = CoyoteRuntime.Current;47            if (runtime.SchedulingPolicy is SchedulingPolicy.Interleaving)48            {49                lockTaken = SynchronizedBlock.Lock(obj).IsLockTaken;50            }51            else52            {53                if (runtime.SchedulingPolicy is SchedulingPolicy.Fuzzing &&54                    runtime.TryGetExecutingOperation(out ControlledOperation current))55                {56                    runtime.DelayOperation(current);57                }58                SystemThreading.Monitor.Enter(obj, ref lockTaken);59            }60        }61        /// <summary>62        /// Releases an exclusive lock on the specified object.63        /// </summary>64        public static void Exit(object obj)65        {66            var runtime = CoyoteRuntime.Current;67            if (runtime.SchedulingPolicy is SchedulingPolicy.Interleaving)68            {69                var block = SynchronizedBlock.Find(obj) ??70                    throw new SystemThreading.SynchronizationLockException();71                block.Exit();72            }73            else74            {75                SystemThreading.Monitor.Exit(obj);76            }77        }78        /// <summary>79        /// Determines whether the current thread holds the lock on the specified object.80        /// </summary>81        public static bool IsEntered(object obj)82        {83            var runtime = CoyoteRuntime.Current;84            if (runtime.SchedulingPolicy is SchedulingPolicy.Interleaving)85            {86                var block = SynchronizedBlock.Find(obj) ??87                    throw new SystemThreading.SynchronizationLockException();88                return block.IsEntered();89            }90            return SystemThreading.Monitor.IsEntered(obj);91        }92        /// <summary>93        /// Notifies a thread in the waiting queue of a change in the locked object's state.94        /// </summary>95        public static void Pulse(object obj)96        {97            var runtime = CoyoteRuntime.Current;98            if (runtime.SchedulingPolicy is SchedulingPolicy.Interleaving)99            {100                var block = SynchronizedBlock.Find(obj) ??101                    throw new SystemThreading.SynchronizationLockException();102                block.Pulse();103            }104            else105            {106                SystemThreading.Monitor.Pulse(obj);107            }108        }109        /// <summary>110        /// Notifies all waiting threads of a change in the object's state.111        /// </summary>112        public static void PulseAll(object obj)113        {114            var runtime = CoyoteRuntime.Current;115            if (runtime.SchedulingPolicy is SchedulingPolicy.Interleaving)116            {117                var block = SynchronizedBlock.Find(obj) ??118                    throw new SystemThreading.SynchronizationLockException();119                block.PulseAll();120            }121            else122            {123                SystemThreading.Monitor.PulseAll(obj);124            }125        }126        /// <summary>127        /// Attempts, for the specified amount of time, to acquire an exclusive lock on the specified object,128        /// and atomically sets a value that indicates whether the lock was taken.129        /// </summary>130        public static void TryEnter(object obj, TimeSpan timeout, ref bool lockTaken)131        {132            var runtime = CoyoteRuntime.Current;133            if (runtime.SchedulingPolicy is SchedulingPolicy.Interleaving)134            {135                // TODO: how to implement this timeout?136                lockTaken = SynchronizedBlock.Lock(obj).IsLockTaken;137            }138            else139            {140                if (runtime.SchedulingPolicy is SchedulingPolicy.Fuzzing &&141                    runtime.TryGetExecutingOperation(out ControlledOperation current))142                {143                    runtime.DelayOperation(current);144                }145                SystemThreading.Monitor.TryEnter(obj, timeout, ref lockTaken);146            }147        }148        /// <summary>149        /// Attempts, for the specified amount of time, to acquire an exclusive lock on the specified object,150        /// and atomically sets a value that indicates whether the lock was taken.151        /// </summary>152        public static bool TryEnter(object obj, TimeSpan timeout)153        {154            var runtime = CoyoteRuntime.Current;155            if (runtime.SchedulingPolicy is SchedulingPolicy.Interleaving)156            {157                // TODO: how to implement this timeout?158                return SynchronizedBlock.Lock(obj).IsLockTaken;159            }160            else if (runtime.SchedulingPolicy is SchedulingPolicy.Fuzzing &&161                runtime.TryGetExecutingOperation(out ControlledOperation current))162            {163                runtime.DelayOperation(current);164            }165            return SystemThreading.Monitor.TryEnter(obj, timeout);166        }167        /// <summary>168        /// Attempts, for the specified number of milliseconds, to acquire an exclusive lock on the specified object,169        /// and atomically sets a value that indicates whether the lock was taken.170        /// </summary>171        public static void TryEnter(object obj, int millisecondsTimeout, ref bool lockTaken)172        {173            var runtime = CoyoteRuntime.Current;174            if (runtime.SchedulingPolicy is SchedulingPolicy.Interleaving)175            {176                // TODO: how to implement this timeout?177                lockTaken = SynchronizedBlock.Lock(obj).IsLockTaken;178            }179            else180            {181                if (runtime.SchedulingPolicy is SchedulingPolicy.Fuzzing &&182                    runtime.TryGetExecutingOperation(out ControlledOperation current))183                {184                    runtime.DelayOperation(current);185                }186                SystemThreading.Monitor.TryEnter(obj, millisecondsTimeout, ref lockTaken);187            }188        }189        /// <summary>190        /// Attempts to acquire an exclusive lock on the specified object, and atomically191        /// sets a value that indicates whether the lock was taken.192        /// </summary>193        public static void TryEnter(object obj, ref bool lockTaken)194        {195            var runtime = CoyoteRuntime.Current;196            if (runtime.SchedulingPolicy is SchedulingPolicy.Interleaving)197            {198                // TODO: how to implement this timeout?199                lockTaken = SynchronizedBlock.Lock(obj).IsLockTaken;200            }201            else202            {203                if (runtime.SchedulingPolicy is SchedulingPolicy.Fuzzing &&204                    runtime.TryGetExecutingOperation(out ControlledOperation current))205                {206                    runtime.DelayOperation(current);207                }208                SystemThreading.Monitor.TryEnter(obj, ref lockTaken);209            }210        }211        /// <summary>212        /// Attempts to acquire an exclusive lock on the specified object.213        /// </summary>214        public static bool TryEnter(object obj)215        {216            var runtime = CoyoteRuntime.Current;217            if (runtime.SchedulingPolicy is SchedulingPolicy.Interleaving)218            {219                return SynchronizedBlock.Lock(obj).IsLockTaken;220            }221            else if (runtime.SchedulingPolicy is SchedulingPolicy.Fuzzing &&222                runtime.TryGetExecutingOperation(out ControlledOperation current))223            {224                runtime.DelayOperation(current);225            }226            return SystemThreading.Monitor.TryEnter(obj);227        }228        /// <summary>229        /// Releases the lock on an object and blocks the current thread until it reacquires the lock.230        /// </summary>231        public static bool Wait(object obj)232        {233            var runtime = CoyoteRuntime.Current;234            if (runtime.SchedulingPolicy is SchedulingPolicy.Interleaving)235            {236                var block = SynchronizedBlock.Find(obj) ??237                    throw new SystemThreading.SynchronizationLockException();238                return block.Wait();239            }240            return SystemThreading.Monitor.Wait(obj);241        }242        /// <summary>243        /// Releases the lock on an object and blocks the current thread until it reacquires the lock.244        /// If the specified time-out interval elapses, the thread enters the ready queue.245        /// </summary>246        public static bool Wait(object obj, int millisecondsTimeout)247        {248            var runtime = CoyoteRuntime.Current;249            if (runtime.SchedulingPolicy is SchedulingPolicy.Interleaving)250            {251                var block = SynchronizedBlock.Find(obj) ??252                    throw new SystemThreading.SynchronizationLockException();253                return block.Wait(millisecondsTimeout);254            }255            return SystemThreading.Monitor.Wait(obj, millisecondsTimeout);256        }257        /// <summary>258        /// Releases the lock on an object and blocks the current thread until it reacquires the lock. If the259        /// specified time-out interval elapses, the thread enters the ready queue. This method also specifies260        /// whether the synchronization domain for the context (if in a synchronized context) is exited before261        /// the wait and reacquired afterward.262        /// </summary>263        public static bool Wait(object obj, int millisecondsTimeout, bool exitContext)264        {265            var runtime = CoyoteRuntime.Current;266            if (runtime.SchedulingPolicy is SchedulingPolicy.Interleaving)267            {268                var block = SynchronizedBlock.Find(obj) ??269                    throw new SystemThreading.SynchronizationLockException();270                // TODO: implement exitContext.271                return block.Wait(millisecondsTimeout);272            }273            return SystemThreading.Monitor.Wait(obj, millisecondsTimeout, exitContext);274        }275        /// <summary>276        /// Releases the lock on an object and blocks the current thread until it reacquires the lock.277        /// If the specified time-out interval elapses, the thread enters the ready queue.278        /// </summary>279        public static bool Wait(object obj, TimeSpan timeout)280        {281            var runtime = CoyoteRuntime.Current;282            if (runtime.SchedulingPolicy is SchedulingPolicy.Interleaving)283            {284                var block = SynchronizedBlock.Find(obj) ??285                    throw new SystemThreading.SynchronizationLockException();286                return block.Wait(timeout);287            }288            return SystemThreading.Monitor.Wait(obj, timeout);289        }290        /// <summary>291        /// Releases the lock on an object and blocks the current thread until it reacquires the lock.292        /// If the specified time-out interval elapses, the thread enters the ready queue. Optionally293        /// exits the synchronization domain for the synchronized context before the wait and reacquires294        /// the domain afterward.295        /// </summary>296        public static bool Wait(object obj, TimeSpan timeout, bool exitContext)297        {298            var runtime = CoyoteRuntime.Current;299            if (runtime.SchedulingPolicy is SchedulingPolicy.Interleaving)300            {301                var block = SynchronizedBlock.Find(obj) ??302                    throw new SystemThreading.SynchronizationLockException();303                // TODO: implement exitContext.304                return block.Wait(timeout);305            }306            return SystemThreading.Monitor.Wait(obj, timeout, exitContext);307        }308        /// <summary>309        /// Provides a mechanism that synchronizes access to objects.310        /// </summary>311        internal class SynchronizedBlock : IDisposable312        {313            /// <summary>314            /// Cache from synchronized objects to synchronized block instances.315            /// </summary>316            private static readonly ConcurrentDictionary<object, Lazy<SynchronizedBlock>> Cache =317                new ConcurrentDictionary<object, Lazy<SynchronizedBlock>>();318            /// <summary>319            /// The object used for synchronization.320            /// </summary>321            protected readonly object SyncObject;322            /// <summary>323            /// True if the lock was taken, else false.324            /// </summary>325            internal bool IsLockTaken;326            /// <summary>327            /// The resource associated with this synchronization object.328            /// </summary>329            private readonly Resource Resource;330            /// <summary>331            /// The current owner of this synchronization object.332            /// </summary>333            private ControlledOperation Owner;334            /// <summary>335            /// Wait queue of asynchronous operations.336            /// </summary>337            private readonly List<ControlledOperation> WaitQueue;338            /// <summary>339            /// Ready queue of asynchronous operations.340            /// </summary>341            private readonly List<ControlledOperation> ReadyQueue;342            /// <summary>343            /// Queue of nondeterministically buffered pulse operations to be performed after releasing344            /// the lock. This allows modeling delayed pulse operations by the operation system.345            /// </summary>346            private readonly Queue<PulseOperation> PulseQueue;347            /// <summary>348            /// The number of times that the lock has been acquired per owner. The lock can only349            /// be acquired more than one times by the same owner. A count > 1 indicates that the350            /// invocation by the current owner is reentrant.351            /// </summary>352            private readonly Dictionary<ControlledOperation, int> LockCountMap;353            /// <summary>354            /// Used to reference count accesses to this synchronized block355            /// so that it can be removed from the cache.356            /// </summary>357            private int UseCount;358            /// <summary>359            /// Initializes a new instance of the <see cref="SynchronizedBlock"/> class.360            /// </summary>361            private SynchronizedBlock(object syncObject)362            {363                if (syncObject is null)364                {365                    throw new ArgumentNullException(nameof(syncObject));366                }367                this.SyncObject = syncObject;368                this.Resource = new Resource();369                this.WaitQueue = new List<ControlledOperation>();370                this.ReadyQueue = new List<ControlledOperation>();371                this.PulseQueue = new Queue<PulseOperation>();372                this.LockCountMap = new Dictionary<ControlledOperation, int>();373                this.UseCount = 0;374            }375            /// <summary>376            /// Creates a new <see cref="SynchronizedBlock"/> for synchronizing access377            /// to the specified object and enters the lock.378            /// </summary>379            internal static SynchronizedBlock Lock(object syncObject) =>380                Cache.GetOrAdd(syncObject, key => new Lazy<SynchronizedBlock>(381                    () => new SynchronizedBlock(key))).Value.EnterLock();382            /// <summary>383            /// Finds the synchronized block associated with the specified synchronization object.384            /// </summary>385            internal static SynchronizedBlock Find(object syncObject) =>386                Cache.TryGetValue(syncObject, out Lazy<SynchronizedBlock> lazyMock) ? lazyMock.Value : null;387            /// <summary>388            /// Determines whether the current thread holds the lock on the sync object.389            /// </summary>390            internal bool IsEntered()391            {392                if (this.Owner != null)393                {394                    var op = this.Resource.Runtime.GetExecutingOperation();395                    return this.Owner == op;396                }397                return false;398            }399            private SynchronizedBlock EnterLock()400            {401                this.IsLockTaken = true;402                SystemInterlocked.Increment(ref this.UseCount);403                if (this.Owner is null)404                {405                    // If this operation is trying to acquire this lock while it is free, then inject a scheduling406                    // point to give another enabled operation the chance to race and acquire this lock.407                    this.Resource.Runtime.ScheduleNextOperation(default, SchedulingPointType.Acquire);408                }409                if (this.Owner != null)410                {411                    var op = this.Resource.Runtime.GetExecutingOperation();412                    if (this.Owner == op)413                    {414                        // The owner is re-entering the lock.415                        this.LockCountMap[op]++;416                        return this;417                    }418                    else419                    {420                        // Another op has the lock right now, so add the executing op421                        // to the ready queue and block it.422                        this.WaitQueue.Remove(op);423                        if (!this.ReadyQueue.Contains(op))424                        {425                            this.ReadyQueue.Add(op);426                        }427                        this.Resource.Wait();428                        this.LockCountMap.Add(op, 1);429                        return this;430                    }431                }432                // The executing op acquired the lock and can proceed.433                this.Owner = this.Resource.Runtime.GetExecutingOperation();434                this.LockCountMap.Add(this.Owner, 1);435                return this;436            }437            /// <summary>438            /// Notifies a thread in the waiting queue of a change in the locked object's state.439            /// </summary>440            internal void Pulse() => this.SchedulePulse(PulseOperation.Next);441            /// <summary>442            /// Notifies all waiting threads of a change in the object's state.443            /// </summary>444            internal void PulseAll() => this.SchedulePulse(PulseOperation.All);445            /// <summary>446            /// Schedules a pulse operation that will either execute immediately or be scheduled447            /// to execute after the current owner releases the lock. This nondeterministic action448            /// is controlled by the runtime to simulate scenarios where the pulse is delayed by449            /// the operation system.450            /// </summary>451            private void SchedulePulse(PulseOperation pulseOperation)452            {453                var op = this.Resource.Runtime.GetExecutingOperation();454                if (this.Owner != op)455                {456                    throw new SystemSynchronizationLockException();457                }458                // Pulse has a delay in the operating system, we can simulate that here459                // by scheduling the pulse operation to be executed nondeterministically.460                this.PulseQueue.Enqueue(pulseOperation);461                if (this.PulseQueue.Count is 1)462                {463                    // Create a task for draining the queue. To optimize the testing performance,464                    // we create and maintain a single task to perform this role.465                    Task.Run(this.DrainPulseQueue);466                }467            }468            /// <summary>469            /// Drains the pulse queue, if it contains one or more buffered pulse operations.470            /// </summary>471            private void DrainPulseQueue()472            {473                while (this.PulseQueue.Count > 0)474                {475                    // Pulses can happen nondeterministically while other operations execute,476                    // which models delays by the OS.477                    this.Resource.Runtime.ScheduleNextOperation(default, SchedulingPointType.Default);478                    var pulseOperation = this.PulseQueue.Dequeue();479                    this.Pulse(pulseOperation);480                    if (this.Owner is null)481                    {482                        this.UnlockNextReady();483                    }484                }485            }486            /// <summary>487            /// Invokes the pulse operation.488            /// </summary>489            private void Pulse(PulseOperation pulseOperation)490            {491                if (pulseOperation is PulseOperation.Next)492                {493                    if (this.WaitQueue.Count > 0)494                    {495                        // System.Threading.Monitor has FIFO semantics.496                        var waitingOp = this.WaitQueue[0];497                        this.WaitQueue.RemoveAt(0);498                        this.ReadyQueue.Add(waitingOp);499                        IO.Debug.WriteLine("[coyote::debug] Operation '{0}' is pulsed by task '{1}'.",500                            waitingOp.Id, SystemTask.CurrentId);501                    }502                }503                else504                {505                    foreach (var waitingOp in this.WaitQueue)506                    {507                        this.ReadyQueue.Add(waitingOp);508                        IO.Debug.WriteLine("[coyote::debug] Operation '{0}' is pulsed by task '{1}'.",509                            waitingOp.Id, SystemTask.CurrentId);...

TypeRewritingPass.cs

Source:TypeRewritingPass.cs

...69            this.KnownTypes[NameCache.TaskFactory] = typeof(Types.Threading.Tasks.TaskFactory);70            this.KnownTypes[NameCache.GenericTaskFactory] = typeof(Types.Threading.Tasks.TaskFactory<>);71            this.KnownTypes[NameCache.TaskParallel] = typeof(Types.Threading.Tasks.Parallel);72            // Populate the map with the known synchronization types.73            this.KnownTypes[NameCache.Monitor] = typeof(Types.Threading.Monitor);74            this.KnownTypes[NameCache.SemaphoreSlim] = typeof(Types.Threading.SemaphoreSlim);75#if NET || NETCOREAPP3_176            // Populate the map with the known HTTP and web-related types.77            this.KnownTypes[NameCache.HttpClient] = typeof(Types.Net.Http.HttpClient);78            this.KnownTypes[NameCache.HttpRequestMessage] = typeof(Types.Net.Http.HttpRequestMessage);79#endif80            if (options.IsRewritingConcurrentCollections)81            {82                this.KnownTypes[NameCache.ConcurrentBag] = typeof(Types.Collections.Concurrent.ConcurrentBag<>);83                this.KnownTypes[NameCache.ConcurrentDictionary] = typeof(Types.Collections.Concurrent.ConcurrentDictionary<,>);84                this.KnownTypes[NameCache.ConcurrentQueue] = typeof(Types.Collections.Concurrent.ConcurrentQueue<>);85                this.KnownTypes[NameCache.ConcurrentStack] = typeof(Types.Collections.Concurrent.ConcurrentStack<>);86            }87            if (options.IsDataRaceCheckingEnabled)...

MonitorTests.cs

Source:MonitorTests.cs

...7using System.Threading.Tasks;8using Microsoft.Coyote.Specifications;9using Xunit;10using Xunit.Abstractions;11using Monitor = System.Threading.Monitor;12using SynchronizedBlock = Microsoft.Coyote.Rewriting.Types.Threading.Monitor.SynchronizedBlock;13namespace Microsoft.Coyote.BugFinding.Tests14{15    public class MonitorTests : BaseBugFindingTest16    {17        public MonitorTests(ITestOutputHelper output)18            : base(output)19        {20        }21        [Fact(Timeout = 5000)]22        public void TestSimpleMonitor()23        {24            this.Test(async () =>25            {26                SignalData signal = new SignalData();27                var t1 = Task.Run(signal.Wait);28                var t2 = Task.Run(signal.Signal);29                await Task.WhenAll(t1, t2);30            },31            this.GetConfiguration().WithTestingIterations(100));32        }33        [Fact(Timeout = 5000)]34        public void TestMonitorWithReentrancy1()35        {36            this.Test(() =>37            {38                SignalData signal = new SignalData();39                signal.ReentrantLock();40            },41            this.GetConfiguration().WithTestingIterations(100));42        }43        [Fact(Timeout = 5000)]44        public void TestMonitorWithReentrancy2()45        {46            this.Test(async () =>47            {48                SignalData signal = new SignalData();49                Task t1 = Task.Run(signal.ReentrantLock);50                Task t2 = Task.Run(signal.DoLock);51                await Task.WhenAll(t1, t2);52            },53            this.GetConfiguration().WithTestingIterations(100));54        }55        [Fact(Timeout = 5000)]56        public void TestMonitorWithReentrancy3()57        {58            this.Test(async () =>59            {60                SignalData signal = new SignalData();61                Task t1 = Task.Run(signal.ReentrantWait);62                Task t2 = Task.Run(signal.Signal);63                await Task.WhenAll(t1, t2);64            },65            this.GetConfiguration().WithTestingIterations(100));66        }67        [Fact(Timeout = 5000)]68        public void TestMonitorWithInvalidSyncObject()69        {70            this.TestWithException<ArgumentNullException>(() =>71            {72                using var monitor = SynchronizedBlock.Lock(null);73            },74            replay: true);75        }76        [Fact(Timeout = 5000)]77        public void TestMonitorWithInvalidWaitState()78        {79            this.TestWithException<SynchronizationLockException>(() =>80            {81                SynchronizedBlock monitor;82                using (monitor = SynchronizedBlock.Lock(new object()))83                {84                }85                monitor.Wait();86            },87            replay: true);88        }89        [Fact(Timeout = 5000)]90        public void TestMonitorWithInvalidPulseState()91        {92            this.TestWithException<SynchronizationLockException>(() =>93            {94                SynchronizedBlock monitor;95                using (monitor = SynchronizedBlock.Lock(new object()))96                {97                }98                monitor.Pulse();99            },100            replay: true);101        }102        [Fact(Timeout = 5000)]103        public void TestMonitorWithInvalidPulseAllState()104        {105            this.TestWithException<SynchronizationLockException>(() =>106            {107                SynchronizedBlock monitor;108                using (monitor = SynchronizedBlock.Lock(new object()))109                {110                }111                monitor.PulseAll();112            },113            replay: true);114        }115        [Fact(Timeout = 5000)]116        public void TestMonitorWithInvalidUsage()117        {118            this.TestWithError(async () =>119            {120                try121                {122                    var monitor = SynchronizedBlock.Lock(new object());123                    // We yield to make sure the execution is asynchronous.124                    await Task.Yield();125                    monitor.Pulse();126                    // We do not dispose inside a using statement, because the `SynchronizationLockException`127                    // will trigger the disposal, which will fail because an await statement is not allowed128                    // inside a synchronized block. The C# compiler normally prevents it when using the lock129                    // statement, but we cannot prevent it when directly using the mock.130                    monitor.Dispose();131                }132                catch (SynchronizationLockException)133                {134                    Specification.Assert(false, "Expected exception thrown.");135                }136            },137            expectedError: "Expected exception thrown.",138            replay: true);139        }140        [Fact(Timeout = 5000)]141        public void TestComplexMonitor()142        {143            this.Test(async () =>144            {145                object syncObject = new object();146                bool waiting = false;147                List<string> log = new List<string>();148                Task t1 = Task.Run(() =>149                {150                    Monitor.Enter(syncObject);151                    log.Add("waiting");152                    waiting = true;153                    Monitor.Wait(syncObject);154                    log.Add("received pulse");155                    Monitor.Exit(syncObject);156                });157                Task t2 = Task.Run(async () =>158                {159                    while (!waiting)160                    {161                        await Task.Delay(1);162                    }163                    Monitor.Enter(syncObject);164                    Monitor.Pulse(syncObject);165                    log.Add("pulsed");166                    Monitor.Exit(syncObject);167                });168                await Task.WhenAll(t1, t2);169                string expected = "waiting, pulsed, received pulse";170                string actual = string.Join(", ", log);171                Specification.Assert(expected == actual, "ControlledMonitor out of order, '{0}' instead of '{1}'", actual, expected);172            },173            this.GetConfiguration());174        }175        private class SignalData176        {177            private readonly object SyncObject;178            internal bool Signalled;179            internal SignalData()180            {181                this.SyncObject = new object();182                this.Signalled = false;183            }184            internal void Signal()185            {...

Monitor

Using AI Code Generation

1using Microsoft.Coyote.Rewriting.Types.Threading;2{3    static void Main(string[] args)4    {5        var obj = new object();6        lock (obj)7        {8            Monitor.Enter(obj);9            Monitor.Exit(obj);10        }11    }12}13using System.Threading;14{15    static void Main(string[] args)16    {17        var obj = new object();18        lock (obj)19        {20            Monitor.Enter(obj);21            Monitor.Exit(obj);22        }23    }24}

Monitor

Using AI Code Generation

1using Microsoft.Coyote.Rewriting.Types.Threading;2using System.Threading;3{4    static void Main(string[] args)5    {6        var monitor = new Monitor();7        var thread = new Thread(() => monitor.Enter());8        thread.Start();9        thread.Join();10    }11}12using System.Threading;13{14    static void Main(string[] args)15    {16        var monitor = new Monitor();17        var thread = new Thread(() => monitor.Enter());18        thread.Start();19        thread.Join();20    }21}22using Microsoft.Coyote.Rewriting.Types.Threading;23using System.Threading;24{25    static void Main(string[] args)26    {27        var monitor = new Monitor();28        var thread = new Thread(() => monitor.Enter());29        thread.Start();30        thread.Join();31    }32}33using Microsoft.Coyote.Rewriting.Types.Threading;34using System.Threading;35{36    static void Main(string[] args)37    {38        var monitor = new Monitor();39        var thread = new Thread(() => monitor.Enter());40        thread.Start();41        thread.Join();42    }43}

Monitor

Using AI Code Generation

1using Microsoft.Coyote.Rewriting.Types.Threading;2using System;3using System.Threading.Tasks;4{5    {6        static void Main(string[] args)7        {8            var monitor = new Monitor();9            var thread = new Thread(() => {10                monitor.Enter();11                Console.WriteLine("Hello World!");12                monitor.Exit();13            });14            thread.Start();15            thread.Join();16        }17    }18}19using System;20using System.Threading.Tasks;21{22    {23        static void Main(string[] args)24        {25            var thread = new Thread(() => {26                Console.WriteLine("Hello World!");27            });28            thread.Start();29            thread.Join();30        }31    }32}

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