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How to use EnterMyLock method of System.Threading.ReaderWriterLock class

Best JustMockLite code snippet using System.Threading.ReaderWriterLock.EnterMyLock

ReaderWriterLock.cs

Source:ReaderWriterLock.cs

...41        }4243        public void AcquireReaderLock(int millisecondsTimeout)44        {45            EnterMyLock();46            for (; ; )47            {48                // We can enter a read lock if there are only read-locks have been given out49                // and a writer is not trying to get in.  50                if (owners >= 0 && numWriteWaiters == 0)51                {52                    // Good case, there is no contention, we are basically done53                    owners++;       // Indicate we have another reader54                    break;55                }5657                // Drat, we need to wait.  Mark that we have waiters and wait.  58                if (readEvent == null)      // Create the needed event 59                {60                    LazyCreateEvent(ref readEvent, false);61                    continue;   // since we left the lock, start over. 62                }6364                WaitOnEvent(readEvent, ref numReadWaiters, millisecondsTimeout);65            }66            ExitMyLock();67        }6869        public void EnterWriteLock()70        {71            AcquireWriterLock(int.MaxValue);72        }7374        public void AcquireWriterLock(int millisecondsTimeout)75        {76            EnterMyLock();77            for (; ; )78            {79                if (owners == 0)80                {81                    // Good case, there is no contention, we are basically done82                    owners = -1;    // indicate we have a writer.83                    break;84                }8586                // Drat, we need to wait.  Mark that we have waiters and wait.87                if (writeEvent == null)     // create the needed event.88                {89                    LazyCreateEvent(ref writeEvent, true);90                    continue;   // since we left the lock, start over. 91                }9293                WaitOnEvent(writeEvent, ref numWriteWaiters, millisecondsTimeout);94            }95            ExitMyLock();96        }9798        public void UpgradeToWriterLock(int millisecondsTimeout)99        {100            EnterMyLock();101            for (; ; )102            {103                Debug.Assert(owners > 0, "Upgrading when no reader lock held");104                if (owners == 1)105                {106                    // Good case, there is no contention, we are basically done107                    owners = -1;    // inidicate we have a writer. 108                    break;109                }110111                // Drat, we need to wait.  Mark that we have waiters and wait. 112                if (upgradeEvent == null)   // Create the needed event113                {114                    LazyCreateEvent(ref upgradeEvent, false);115                    continue;   // since we left the lock, start over. 116                }117118                if (numUpgradeWaiters > 0)119                {120                    ExitMyLock();121                    throw new Exception("UpgradeToWriterLock already in process.  Deadlock!");122                }123124                WaitOnEvent(upgradeEvent, ref numUpgradeWaiters, millisecondsTimeout);125            }126            ExitMyLock();127        }128129        public void ExitReadLock()130        {131            ReleaseReaderLock();132        }133134        public void ReleaseReaderLock()135        {136            EnterMyLock();137            Debug.Assert(owners > 0, "ReleasingReaderLock: releasing lock and no read lock taken");138            --owners;139            ExitAndWakeUpAppropriateWaiters();140        }141142        public void ExitWriteLock()143        {144            ReleaseWriterLock();145        }146147        public void ReleaseWriterLock()148        {149            EnterMyLock();150            Debug.Assert(owners == -1, "Calling ReleaseWriterLock when no write lock is held");151            Debug.Assert(numUpgradeWaiters == 0);152            owners++;153            ExitAndWakeUpAppropriateWaiters();154        }155156        public void DowngradeToReaderLock()157        {158            EnterMyLock();159            Debug.Assert(owners == -1, "Downgrading when no writer lock held");160            owners = 1;161            ExitAndWakeUpAppropriateWaiters();162        }163164        /// <summary>165        /// A routine for lazily creating a event outside the lock (so if errors166        /// happen they are outside the lock and that we don't do much work167        /// while holding a spin lock).  If all goes well, reenter the lock and168        /// set 'waitEvent' 169        /// </summary>170        private void LazyCreateEvent(ref EventWaitHandle waitEvent, bool makeAutoResetEvent)171        {172            Debug.Assert(MyLockHeld);173            Debug.Assert(waitEvent == null);174175            ExitMyLock();176            EventWaitHandle newEvent;177            if (makeAutoResetEvent)178                newEvent = new AutoResetEvent(false);179            else180                newEvent = new ManualResetEvent(false);181            EnterMyLock();182            if (waitEvent == null)          // maybe someone snuck in. 183                waitEvent = newEvent;184        }185186        /// <summary>187        /// Waits on 'waitEvent' with a timeout of 'millisceondsTimeout.  188        /// Before the wait 'numWaiters' is incremented and is restored before leaving this routine.189        /// </summary>190        private void WaitOnEvent(EventWaitHandle waitEvent, ref uint numWaiters, int millisecondsTimeout)191        {192            Debug.Assert(MyLockHeld);193194            waitEvent.Reset();195            numWaiters++;196197            bool waitSuccessful = false;198            ExitMyLock();      // Do the wait outside of any lock 199            try200            {201                if (!waitEvent.WaitOne(millisecondsTimeout))202                    throw new Exception("ReaderWriterLock timeout expired");203                waitSuccessful = true;204            }205            finally206            {207                EnterMyLock();208                --numWaiters;209                if (!waitSuccessful)        // We are going to throw for some reason.  Exit myLock. 210                    ExitMyLock();211            }212        }213214        /// <summary>215        /// Determines the appropriate events to set, leaves the locks, and sets the events. 216        /// </summary>217        private void ExitAndWakeUpAppropriateWaiters()218        {219            Debug.Assert(MyLockHeld);220221            if (owners == 0 && numWriteWaiters > 0)222            {223                ExitMyLock();      // Exit before signaling to improve efficiency (wakee will need the lock)224                writeEvent.Set();   // release one writer. 225            }226            else if (owners == 1 && numUpgradeWaiters != 0)227            {228                ExitMyLock();          // Exit before signaling to improve efficiency (wakee will need the lock)229                upgradeEvent.Set();     // release all upgraders (however there can be at most one). 230                // two threads upgrading is a guarenteed deadlock, so we throw in that case. 231            }232            else if (owners >= 0 && numReadWaiters != 0)233            {234                ExitMyLock();    // Exit before signaling to improve efficiency (wakee will need the lock)235                readEvent.Set();  // release all readers. 236            }237            else238                ExitMyLock();239        }240241        private void EnterMyLock()242        {243            if (Interlocked.CompareExchange(ref myLock, 1, 0) != 0)244                EnterMyLockSpin();245        }246        247        private void EnterMyLockSpin()248        {249            for (int i = 0; ; i++)250            {251                if (i < 3 && Environment.ProcessorCount > 1)252#if NETFX_CORE253                    SpinWait.SpinUntil(() => false, 20);254#else255                Thread.SpinWait(20);    // Wait a few dozen instructions to let another processor release lock. 256#endif257                else258#if NETFX_CORE259                    SpinWait.SpinUntil(() => false, 0);260#else261                    Thread.Sleep(0);        // Give up my quantum.  
...

SilverLightReaderWriterLock.cs

Source:SilverLightReaderWriterLock.cs

...61        }6263        public void AcquireReaderLock(int timeoutMilliseconds)64        {65            EnterMyLock();66            for (; _writerOwner.Value == 0; )67            {68                // We can enter a read lock if there are only read-locks have been given out69                // and a writer is not trying to get in.  70                if (owners >= 0 && numWriteWaiters == 0)71                {72                    // Good case, there is no contention, we are basically done73                    owners++;       // Indicate we have another reader74                    break;75                }7677                // Drat, we need to wait.  Mark that we have waiters and wait.  78                if (readEvent == null)      // Create the needed event 79                {80                    LazyCreateEvent(ref readEvent, false);81                    continue;   // since we left the lock, start over. 82                }8384                WaitOnEvent(readEvent, ref numReadWaiters, timeoutMilliseconds);85            }86            ExitMyLock();87        }8889        public void AcquireWriterLock(int timeoutMilliseconds)90        {91            EnterMyLock();92            for (; _writerOwner.Value == 0; )93            {94                if (owners == 0)95                {96                    // Good case, there is no contention, we are basically done97                    owners = -1;    // indicate we have a writer.98                    break;99                }100101                // Drat, we need to wait.  Mark that we have waiters and wait.102                if (writeEvent == null)     // create the needed event.103                {104                    LazyCreateEvent(ref writeEvent, true);105                    continue;   // since we left the lock, start over. 106                }107108                WaitOnEvent(writeEvent, ref numWriteWaiters, timeoutMilliseconds);109            }110            ExitMyLock();111112            _writerOwner.Value++;113        }114115        public object UpgradeToWriterLock(int timeoutMilliseconds)116        {117            EnterMyLock();118            for (; _writerOwner.Value == 0; )119            {120                Debug.Assert(owners > 0, "Upgrading when no reader lock held");121                if (owners == 1)122                {123                    // Good case, there is no contention, we are basically done124                    owners = -1;    // inidicate we have a writer. 125                    break;126                }127128                // Drat, we need to wait.  Mark that we have waiters and wait. 129                if (upgradeEvent == null)   // Create the needed event130                {131                    LazyCreateEvent(ref upgradeEvent, false);132                    continue;   // since we left the lock, start over. 133                }134135                if (numUpgradeWaiters > 0)136                {137                    ExitMyLock();138                    throw new Exception("UpgradeToWriterLock already in process.  Deadlock!");139                }140141                WaitOnEvent(upgradeEvent, ref numUpgradeWaiters, timeoutMilliseconds);142            }143            ExitMyLock();144145            _writerOwner.Value++;146147            return null;148        }149150        public void ReleaseReaderLock()151        {152            EnterMyLock();153            Debug.Assert(owners > 0 && _writerOwner.Value == 0 || _writerOwner.Value != 0, "ReleasingReaderLock: releasing lock and no read lock taken");154            if (_writerOwner.Value == 0)155            {156                --owners;157            }158            ExitAndWakeUpAppropriateWaiters();159        }160161        public void ReleaseWriterLock()162        {163            EnterMyLock();164            Debug.Assert(owners == -1, "Calling ReleaseWriterLock when no write lock is held");165            // Debug.Assert(numUpgradeWaiters > 0);166            owners++;167            _writerOwner.Value--;168            ExitAndWakeUpAppropriateWaiters();169        }170171        public void DowngradeFromWriterLock(ref object cookie)172        {173            EnterMyLock();174            Debug.Assert(owners == -1 || _writerOwner.Value != 0, "Downgrading when no writer lock held");175            owners = 1;176            _writerOwner.Value--;177            ExitAndWakeUpAppropriateWaiters();178        }179180        /// <summary>181        /// A routine for lazily creating a event outside the lock (so if errors182        /// happen they are outside the lock and that we don't do much work183        /// while holding a spin lock).  If all goes well, reenter the lock and184        /// set 'waitEvent' 185        /// </summary>186        private void LazyCreateEvent(ref EventWaitHandle waitEvent, bool makeAutoResetEvent)187        {188            Debug.Assert(MyLockHeld);189            Debug.Assert(waitEvent == null);190191            ExitMyLock();192            EventWaitHandle newEvent;193            if (makeAutoResetEvent)194                newEvent = new AutoResetEvent(false);195            else196                newEvent = new ManualResetEvent(false);197            EnterMyLock();198            if (waitEvent == null)          // maybe someone snuck in. 199                waitEvent = newEvent;200        }201202        /// <summary>203        /// Waits on 'waitEvent' with a timeout of 'millisceondsTimeout.  204        /// Before the wait 'numWaiters' is incremented and is restored before leaving this routine.205        /// </summary>206        private void WaitOnEvent(EventWaitHandle waitEvent, ref uint numWaiters, int millisecondsTimeout)207        {208            Debug.Assert(MyLockHeld);209210            waitEvent.Reset();211            numWaiters++;212213            bool waitSuccessful = false;214            ExitMyLock();      // Do the wait outside of any lock 215            try216            {217                if (!waitEvent.WaitOne(TimeSpan.FromMilliseconds(millisecondsTimeout), false))218                    throw new Exception("ReaderWriterLock timeout expired");219                waitSuccessful = true;220            }221            finally222            {223                EnterMyLock();224                --numWaiters;225                if (!waitSuccessful)        // We are going to throw for some reason.  Exit myLock. 226                    ExitMyLock();227            }228        }229230        /// <summary>231        /// Determines the appropriate events to set, leaves the locks, and sets the events. 232        /// </summary>233        private void ExitAndWakeUpAppropriateWaiters()234        {235            Debug.Assert(MyLockHeld);236237            if (owners == 0 && numWriteWaiters > 0)238            {239                ExitMyLock();      // Exit before signaling to improve efficiency (wakee will need the lock)240                writeEvent.Set();   // release one writer. 241            }242            else if (owners == 1 && numUpgradeWaiters != 0)243            {244                ExitMyLock();          // Exit before signaling to improve efficiency (wakee will need the lock)245                upgradeEvent.Set();     // release all upgraders (however there can be at most one). 246                // two threads upgrading is a guarenteed deadlock, so we throw in that case. 247            }248            else if (owners >= 0 && numReadWaiters != 0)249            {250                ExitMyLock();    // Exit before signaling to improve efficiency (wakee will need the lock)251                readEvent.Set();  // release all readers. 252            }253            else254                ExitMyLock();255        }256257        private void EnterMyLock()258        {259            if (Interlocked.CompareExchange(ref myLock, 1, 0) != 0)260                EnterMyLockSpin();261        }262263        private void EnterMyLockSpin()264        {265            for (int i = 0; ; i++)266            {267                if (i < 3 && Environment.ProcessorCount > 1)268                    Thread.SpinWait(20);    // Wait a few dozen instructions to let another processor release lock. 269                else270                    Thread.Sleep(0);        // Give up my quantum.  271272                if (Interlocked.CompareExchange(ref myLock, 1, 0) == 0)273                    return;274            }275        }276        private void ExitMyLock()277        {
...

EnterMyLock

Using AI Code Generation

1{2    {3        static void Main(string[] args)4        {5            ReaderWriterLock rwl = new ReaderWriterLock();6            rwl.EnterMyLock();7            rwl.ExitMyLock();8        }9    }10}11{12    {13        static void Main(string[] args)14        {15            ReaderWriterLockSlim rwls = new ReaderWriterLockSlim();16            rwls.EnterMyLock();17            rwls.ExitMyLock();18        }19    }20}21protected override void OnStop()22{23    m_readerWriterLockSlim.Dispose();24}25m_readerWriterLockSlim = new ReaderWriterLockSlim(LockRecursionPolicy.SupportsRecursion);26m_readerWriterLockSlim.EnterReadLock();27m_readerWriterLockSlim.ExitReadLock();

EnterMyLock

Using AI Code Generation

1using System;2using System.Threading;3{4   {5      static ReaderWriterLock rwl = new ReaderWriterLock();6      public static void Main()7      {8         rwl.EnterMyLock();9         Console.WriteLine("Inside the lock");10         rwl.ExitMyLock();11      }12   }13}14using System;15using System.Threading;16{17   {18      static ReaderWriterLock rwl = new ReaderWriterLock();19      public static void Main()20      {21         if(rwl.TryEnterMyLock(1000)) 22         {23            Console.WriteLine("Inside the lock");24            rwl.ExitMyLock();25         }26         {27            Console.WriteLine("Could not enter the lock");28         }29      }30   }31}32using System;33using System.Threading;34{35   {36      static ReaderWriterLock rwl = new ReaderWriterLock();37      public static void Main()38      {39         rwl.EnterReadLock();40         Console.WriteLine("Inside the lock");41         rwl.ExitReadLock();42      }43   }44}45using System;46using System.Threading;47{48   {49      static ReaderWriterLock rwl = new ReaderWriterLock();50      public static void Main()51      {52         if(rwl.TryEnterReadLock(1000)) 53         {54            Console.WriteLine("Inside the lock");55            rwl.ExitReadLock();56         }57         {58            Console.WriteLine("Could not enter the lock");59         }60      }61   }62}63using System;64using System.Threading;65{66   {67      static ReaderWriterLock rwl = new ReaderWriterLock();68      public static void Main()69      {

EnterMyLock

Using AI Code Generation

1using System;2using System.Threading;3{4    {5        public static void Main()6        {7            ReaderWriterLock rwl = new ReaderWriterLock();8            rwl.AcquireReaderLock(Timeout.Infinite);9            rwl.ReleaseReaderLock();10            rwl.AcquireWriterLock(Timeout.Infinite);11            rwl.ReleaseWriterLock();12        }13    }14}15using System;16using System.Threading;17{18    {19        public static void Main()20        {21            ReaderWriterLock rwl = new ReaderWriterLock();22            rwl.EnterMyLock();23            rwl.ExitMyLock();24            rwl.EnterWriteLock();25            rwl.ExitWriteLock();26        }27    }28}

EnterMyLock

Using AI Code Generation

1using System;2using System.Threading;3{4    public static void Main()5    {6        ReaderWriterLock rwLock = new ReaderWriterLock();7        rwLock.EnterMyLock();8        Console.WriteLine("Inside the lock");9        rwLock.ExitMyLock();10    }11}

EnterMyLock

Using AI Code Generation

1using System;2using System.Threading;3{4    static void Main()5    {6        ReaderWriterLock rwl = new ReaderWriterLock();7        rwl.EnterMyLock();8        Console.WriteLine("In the lock");9        rwl.ExitMyLock();10    }11}12using System;13using System.Threading;14{15    static void Main()16    {17        ReaderWriterLock rwl = new ReaderWriterLock();18        rwl.EnterWriteLock();19        rwl.EnterMyLock();20        Console.WriteLine("In the lock");21        rwl.ExitMyLock();22    }23}24using System;25using System.Threading;26{27    static void Main()28    {29        ReaderWriterLock rwl = new ReaderWriterLock();30        rwl.EnterReadLock();31        rwl.EnterMyLock();32        Console.WriteLine("In the lock");33        rwl.ExitMyLock();34    }35}36using System;37using System.Threading;38{39    static void Main()40    {41        ReaderWriterLock rwl = new ReaderWriterLock();42        rwl.EnterUpgradeableReadLock();43        rwl.EnterMyLock();

EnterMyLock

Using AI Code Generation

1using System;2using System.Threading;3{4    static void Main()5    {6        ReaderWriterLock rwl = new ReaderWriterLock();7        rwl.EnterMyLock();8        Console.WriteLine("Lock has been acquired");9        rwl.ExitMyLock();10        Console.WriteLine("Lock has been released");11        Console.ReadLine();12    }13}14using System;15using System.Threading;16{17    static void Main()18    {19        ReaderWriterLock rwl = new ReaderWriterLock();20        rwl.EnterReadLock();21        Console.WriteLine("Read lock has been acquired");22        rwl.ExitReadLock();23        Console.WriteLine("Read lock has been released");24        Console.ReadLine();25    }26}27using System;28using System.Threading;29{30    static void Main()31    {32        ReaderWriterLock rwl = new ReaderWriterLock();33        rwl.EnterUpgradeableReadLock();34        Console.WriteLine("UpgradeableRead lock has been acquired");35        rwl.ExitUpgradeableReadLock();36        Console.WriteLine("UpgradeableRead lock has been released");37        Console.ReadLine();38    }39}40using System;41using System.Threading;42{43    static void Main()44    {45        ReaderWriterLock rwl = new ReaderWriterLock();46        rwl.EnterWriteLock();47        Console.WriteLine("Write lock has been acquired");48        rwl.ExitWriteLock();49        Console.WriteLine("Write lock has been released");50        Console.ReadLine();51    }52}53using System;54using System.Threading;55{56    static void Main()57    {58        ReaderWriterLock rwl = new ReaderWriterLock();59        rwl.EnterReadLock();60        Console.WriteLine("Read lock has been acquired");61        Console.WriteLine("IsReaderLockHeld: " + rwl.IsReaderLockHeld);62        rwl.ExitReadLock();63        Console.WriteLine("Read lock has been released");64        Console.ReadLine();65    }66}

EnterMyLock

Using AI Code Generation

1using System;2using System.Threading;3{4   public static void Main()5   {6      ReaderWriterLock rwlock = new ReaderWriterLock();7      rwlock.EnterMyLock();8      Console.WriteLine("Lock acquired");9   }10}11using System;12using System.Threading;13{14   public static void Main()15   {16      ReaderWriterLockSlim rwlock = new ReaderWriterLockSlim();17      rwlock.EnterMyLock();18      Console.WriteLine("Lock acquired");19   }20}21using System;22using System.Threading;23{24   public static void Main()25   {26      ReaderWriterLock rwlock = new ReaderWriterLock();27      rwlock.EnterReadLock();28      Console.WriteLine("Lock acquired");29   }30}31using System;32using System.Threading;33{34   public static void Main()35   {36      ReaderWriterLockSlim rwlock = new ReaderWriterLockSlim();37      rwlock.EnterReadLock();38      Console.WriteLine("Lock acquired");39   }40}41using System;42using System.Threading;43{44   public static void Main()45   {46      ReaderWriterLock rwlock = new ReaderWriterLock();47      rwlock.EnterWriteLock();48      Console.WriteLine("Lock acquired");49   }50}51using System;52using System.Threading;53{54   public static void Main()55   {56      ReaderWriterLockSlim rwlock = new ReaderWriterLockSlim();57      rwlock.EnterWriteLock();58      Console.WriteLine("Lock acquired");59   }60}61using System;62using System.Threading;63{64   public static void Main()65   {66      ReaderWriterLock rwlock = new ReaderWriterLock();67      rwlock.EnterUpgradeableReadLock();68      Console.WriteLine("Lock acquired");69   }70}

EnterMyLock

Using AI Code Generation

1using System;2using System.Threading;3{4   public static ReaderWriterLock rwl = new ReaderWriterLock();5   public static void Main()6   {7      Thread t1 = new Thread( new ThreadStart( MyThread.ThreadProc ) );8      t1.Start();9      Thread.Sleep(1000);10      rwl.EnterMyLock();11      Console.WriteLine("Thread {0} entered the lock",Thread.CurrentThread.Name);12      Thread.Sleep(2000);13      rwl.ExitMyLock();14      Console.WriteLine("Thread {0} exited the lock",Thread.CurrentThread.Name);15      Thread.Sleep(2000);16   }17   public static void ThreadProc()18   {19      Thread.CurrentThread.Name = "ThreadProc";20      rwl.EnterMyLock();21      Console.WriteLine("Thread {0} entered the lock",Thread.CurrentThread.Name);22      Thread.Sleep(2000);23      rwl.ExitMyLock();24      Console.WriteLine("Thread {0} exited the lock",Thread.CurrentThread.Name);25      Thread.Sleep(2000);26   }27}28using System;29using System.Threading;30{31   public static ReaderWriterLock rwl = new ReaderWriterLock();32   public static void Main()33   {34      Thread t1 = new Thread( new ThreadStart( MyThread.ThreadProc ) );35      t1.Start();36      Thread.Sleep(1000);37      rwl.EnterWriteLock();38      Console.WriteLine("Thread {0} entered the lock",Thread.CurrentThread.Name);39      Thread.Sleep(2000);40      rwl.ExitWriteLock();41      Console.WriteLine("Thread {0} exited the lock",Thread.CurrentThread.Name);42      Thread.Sleep(2000);43   }44   public static void ThreadProc()45   {46      Thread.CurrentThread.Name = "ThreadProc";

EnterMyLock

Using AI Code Generation

1using System;2using System.Threading;3{4   {5      static ReaderWriterLock rwl = new ReaderWriterLock();6      static int count = 0;7      static void Main()8      {9         for(int i=0; i<10; i++)10         {11            new Thread(EnterMyLock).Start();12         }13      }14      static void EnterMyLock()15      {16         rwl.EnterMyLock();17         int temp = count;18         Thread.Sleep(1);19         count = temp + 1;20         Console.WriteLine(count);21         rwl.ExitMyLock();22      }23   }24}25using System;26using System.Threading;27{28   {29      static ReaderWriterLock rwl = new ReaderWriterLock();30      static int count = 0;31      static void Main()32      {33         for(int i=0; i<10; i++)34         {35            new Thread(EnterReadLock).Start();36         }37      }38      static void EnterReadLock()39      {40         rwl.EnterReadLock();41         int temp = count;42         Thread.Sleep(1);43         count = temp + 1;44         Console.WriteLine(count);45         rwl.ExitReadLock();46      }47   }48}49using System;50using System.Threading;51{52   {53      static ReaderWriterLock rwl = new ReaderWriterLock();54      static int count = 0;55      static void Main()56      {57         for(int i=0; i<10; i++)58         {59            new Thread(EnterWriteLock).Start();60         }61      }62      static void EnterWriteLock()63      {64         rwl.EnterWriteLock();65         int temp = count;66         Thread.Sleep(1);67         count = temp + 1;68         Console.WriteLine(count);69         rwl.ExitWriteLock();70      }71   }72}73using System;74using System.Threading;75{76   {77      static ReaderWriterLock rwl = new ReaderWriterLock();

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