public static void RunSpinLockTest0_Enter(int threadsCount, bool enableThreadIDs)
{
// threads array
Task[] threads = new Task[threadsCount];
//spinlock object
SpinLock slock = new SpinLock(enableThreadIDs);
// succeeded threads counter
int succeeded = 0;
// Semaphore used to make sure that there is no other threads in the critical section
SemaphoreSlim semaphore = new SemaphoreSlim(1, 1);
for (int i = 0; i < threadsCount; i++)
{
threads[i] = Task.Run(delegate ()
{
bool lockTaken = false;
try
{
slock.Enter(ref lockTaken);
//use semaphore to make sure that no other thread inside the critical section
if (!semaphore.Wait(0))
{
// This mean that there is another thread in the critical section
return;
}
succeeded++;
if (slock.IsThreadOwnerTrackingEnabled && !slock.IsHeldByCurrentThread)
{
// lock is obtained successfully
succeeded--;
}
}
catch
{
// decrement the count in case of exception
succeeded--;
}
finally
{
semaphore.Release();
if (lockTaken)
{
slock.Exit();
}
}
});
}
// wait all threads
for (int i = 0; i < threadsCount; i++)
{
threads[i].Wait();
}
// count must be equal to the threads count
Assert.Equal(threadsCount, succeeded);
}
public static void EnterExit()
{
var sl = new SpinLock();
Assert.True(sl.IsThreadOwnerTrackingEnabled);
for (int i = 0; i < 4; i++)
{
Assert.False(sl.IsHeld);
Assert.False(sl.IsHeldByCurrentThread);
bool lockTaken = false;
if (i % 2 == 0)
sl.Enter(ref lockTaken);
else
sl.TryEnter(ref lockTaken);
Assert.True(lockTaken);
Assert.True(sl.IsHeld);
Assert.True(sl.IsHeldByCurrentThread);
Task.Factory.StartNew(() =>
{
Assert.True(sl.IsHeld);
Assert.False(sl.IsHeldByCurrentThread);
}, CancellationToken.None, TaskCreationOptions.LongRunning, TaskScheduler.Default).GetAwaiter().GetResult();
sl.Exit();
}
}
private int _lockReleased; //0 : true | 1 : false
public SpinLockBlock(SpinLock lockTarget)
{
_lockTarget = lockTarget;
var lockTaken = false;
_lockTarget.Enter(ref lockTaken);
if (lockTaken)
{
_lockReleased = FALSE; // false
}
}
public static void RunSpinLockTestExceptions()
{
SpinLock slock = new SpinLock();
bool isTaken = true;
Assert.Throws <ArgumentException>(() => slock.Enter(ref isTaken));
// Failure Case: Enter didn't throw AE when isTaken is true
slock = new SpinLock(false);
Assert.Throws <InvalidOperationException>(() => { bool iHeld = slock.IsHeldByCurrentThread; });
// Failure Case: IsHeldByCurrentThread didn't throw IOE when the thread tracking is disabled
}
public DisposableSpinLock(SpinLock thelock, bool tryLock)
{
this.mylock = thelock;
if (tryLock)
{
mylock.TryEnter(ref isLocked);
}
else
{
mylock.Enter(ref isLocked);
}
}
static void Main()
{
#pragma warning disable 219
int x = 0;
#pragma warning restore 219
const int iterations = 10000000; // 10 миллионов
// Note: Сколько времени займет инкремент x 10 миллионов раз?
Stopwatch stopwatch = Stopwatch.StartNew();
for (int i = 0; i < iterations; i++)
{
x++;
}
Console.WriteLine("Incrementing x: {0:N0}", stopwatch.ElapsedMilliseconds);
// Note: Сколько времени займет инкремент x 10 миллионов раз, если
// добавить вызов ничего не делающего метода?
stopwatch.Restart();
for (int i = 0; i < iterations; i++)
{
Dummy();
x++;
Dummy();
}
Console.WriteLine("Incrementing x in Dummy: {0:N0}", stopwatch.ElapsedMilliseconds);
// Note: Сколько времени займет инкремент x 10 миллионов раз, если
// добавить вызов неконкурирующего объекта SpinLock
var spinLock = new SpinLock();
stopwatch.Restart();
for (int i = 0; i < iterations; i++)
{
bool lockTaken = false;
spinLock.Enter(ref lockTaken);
x++;
spinLock.Exit();
}
Console.WriteLine("Incrementing x in SpinLock: {0:N0}", stopwatch.ElapsedMilliseconds);
// Note: Сколько времени займет инкремент x 10 миллионов раз, если
// добавить вызов неконкурирующего объекта SimpleWaitLock?
using (var waitLock = new SimpleWaitLock())
{
stopwatch.Restart();
for (int i = 0; i < iterations; i++)
{
waitLock.Enter();
x++;
waitLock.Leave();
}
Console.WriteLine("Incrementing x in SimpleWaitLock: {0:N0}", stopwatch.ElapsedMilliseconds);
}
}
public AsyncEntryBlockUC TryEnter()
{
using (SpinLock.Enter())
{
if (LockStatus == Status.Locked)
{
return(AsyncEntryBlockUC.RefusedEntry);
}
LockStatus = Status.Locked;
return(new AsyncEntryBlockUC(ExclusiveEntry));
}
}
/// <summary>
/// Reads the scan code from the device
/// </summary>
protected void ReadScanCode()
{
spinLock.Enter();
byte v = commandPort.Read8();
AddToFIFO(v);
HAL.DebugWrite(" scancode: " + v.ToString() + " ");
spinLock.Exit();
}
public bool TryGetInstance(bool throttle, float totalTime, out WrappedSoundEffectInstance result)
{
result = null;
if (!(totalTime - lastPlayed > definition.MinimumTimeBetween) && throttle)
{
return(false);
}
bool lockTaken = false;
spinLock.Enter(ref lockTaken);
try
{
if (instanceCount < definition.InstanceLimit || !throttle)
{
instanceCount++;
}
else
{
return(false);
}
lastPlayed = totalTime;
}
finally
{
spinLock.Exit();
}
var pooledObject = instancePool.GetFree();
result = pooledObject.Value;
result.PoolObject = pooledObject;
result.Instance.Volume = MathHelper.Clamp(RandomExt.GetRandomFloat(definition.MinVolume, definition.MaxVolume), 0, 1);
result.Instance.Pitch = MathHelper.Clamp(RandomExt.GetRandomFloat(definition.MinPitchShift, definition.MaxPitchShift), 0, 1);
return(true);
}
private BindingInfo?GetBindingForType(Type type, string?exchange, string?topic, Func <string, string, BindingInfo> createBindingFunc)
{
BindingInfo info;
bool lockTaken = false;
try
{
_spinLock.Enter(ref lockTaken);
if (!_exchages.TryGetValue(type, out info))
{
var attr = type.GetCustomAttribute <ExchangeRouteAttribute>();
if (exchange == null)
{
exchange = attr?.Exchange ?? _globalExchange;
if (exchange == null)
{
return(null);
}
}
if (topic == null)
{
topic = attr?.Topic ?? type.Name;
}
info = createBindingFunc(exchange, topic);
_exchages.Add(type, info);
}
return(info);
}
finally
{
if (lockTaken)
{
_spinLock.Exit(true);
}
}
}
/// <summary>Takes an array from the bucket. If the bucket is empty, returns null.</summary>
internal T[] Rent()
{
T[][] buffers = _buffers;
T[] buffer = null;
// While holding the lock, grab whatever is at the next available index and
// update the index. We do as little work as possible while holding the spin
// lock to minimize contention with other threads. The try/finally is
// necessary to properly handle thread aborts on platforms which have them.
bool lockTaken = false, allocateBuffer = false;
try
{
_lock.Enter(ref lockTaken);
if (_index < buffers.Length)
{
buffer = buffers[_index];
buffers[_index++] = null;
allocateBuffer = buffer == null;
}
}
finally
{
if (lockTaken)
{
_lock.Exit(false);
}
}
// While we were holding the lock, we grabbed whatever was at the next available index, if
// there was one. If we tried and if we got back null, that means we hadn't yet allocated
// for that slot, in which case we should do so now.
if (allocateBuffer)
{
buffer = new T[_bufferLength];
}
return(buffer);
}
public ActorReference ActorOf <T> (string name, object initializationData, Mailbox mailbox) where T : Actor, new ()
{
var reference = CreateActorReference(name, mailbox);
Actor actor = new T();
actor.Self = reference;
reference.State = ActorStates.Initializing;
actor.Initialize(initializationData);
var lockTaken = false;
try
{
Spin.Enter(ref lockTaken);
reference.State = ActorStates.Idle;
mailbox.EnqueueActor(actor);
}
finally
{
if (lockTaken)
{
Spin.Exit(false);
}
}
return(reference);
}
static void Main(string[] args)
{
// Create the bank account instance
BankAccount account = new BankAccount();
// Create the spinlock
SpinLock spinlock = new SpinLock();
// Create an array of tasks
Task[] tasks = new Task[10];
for (int i = 0; i < tasks.Length; i++)
{
// Create the new task
tasks[i] = new Task(() =>
{
// Enter a loop for 1000 balance updates
for (int j = 0; j < 1000; j++)
{
bool lockAcquired = false;
try
{
spinlock.Enter(ref lockAcquired);
// Update the balance
account.Balance++;
}
finally
{
if (lockAcquired)
{
spinlock.Exit();
}
}
}
});
// Start the new task
tasks[i].Start();
}
// Wait for all of the tasks to complete
Task.WaitAll(tasks);
// Write out the counter value
Console.WriteLine("Expected value {0}", 10000);
Console.WriteLine("Balance: {0}", account.Balance);
// Wait for input before exiting
Console.WriteLine("Press enter to finish");
Console.ReadLine();
}
public void Execute(ITashaHousehold household, int iteration)
{
var householdFitness = (float)EvaluateHousehold(household);
bool taken = false;
FitnessUpdateLock.Enter(ref taken);
Thread.MemoryBarrier();
Fitness += householdFitness;
if (taken)
{
FitnessUpdateLock.Exit(true);
}
}
protected override void InternalEnqueue(Action action)
{
bool lockTaken = false;
try
{
_spinLock.Enter(ref lockTaken);
_queue.Add(action);
if (!_flushPending)
{
_taskFactory.StartNew(Flush);
_flushPending = true;
}
}
finally
{
if (lockTaken)
{
_spinLock.Exit();
}
}
}
public Memory Get()
{
var locked = false;
try
{
queueLock.Enter(ref locked);
if ((queue ?? throw new ObjectDisposedException(GetType().FullName)).Count > 0)
{
return(queue.Dequeue());
}
}
finally
{
if (locked)
{
queueLock.Exit(false);
}
}
return(new Memory(this));
}
internal void Add(ITashaHousehold household)
{
var expansionFactor = household.ExpansionFactor;
bool taken = false;
Lock.Enter(ref taken);
TotalExpansionFactor += expansionFactor;
Households.Add(new ExpandedHousehold(household));
if (taken)
{
Lock.Exit(true);
}
}
internal unsafe byte[]? Receive(TKey key,
byte *src,
int chunkLength,
int chunkOffset,
int length)
{
if (!_bigDataBuffers.TryGetValue(key, out Buffer bdb))
{
bool lockTaken = false;
try
{
_bigDataBufferLock.Enter(ref lockTaken);
if (!_bigDataBuffers.TryGetValue(key, out bdb))
{
_bigDataBuffers.Add(key, bdb = Create(key, length));
}
}
finally
{
if (lockTaken)
{
_bigDataBufferLock.Exit(false);
}
}
}
fixed(byte *dst = bdb._data)
{
Mem.Cpy(dst + chunkOffset, src, chunkLength);
}
if (bdb.AddBytes(chunkLength) == 0)
{
Remove(key);
return(bdb._data);
}
return(null);
}
public static void MSSpinLock()
{
var ss2 = new SpinLock();
var number = 0;
Parallel.For(0, 100000, (i) =>
{
bool lockTaken = false;
ss2.Enter(ref lockTaken);
number++;
ss2.Exit();
});
}
/// <summary>
/// Returns whether a new item can be accepted, and increments a counter if it can.
/// </summary>
bool TryAdd()
{
bool lockTaken = false;
try {
batchCountLock.Enter(ref lockTaken);
if (options.MaxNumberOfGroups != -1 &&
numberOfGroups + batchCount / BatchSize >= options.MaxNumberOfGroups)
{
return(false);
}
batchCount++;
return(true);
} finally {
if (lockTaken)
{
batchCountLock.Exit();
}
}
}
public void Enqueue(Action continuation) {
bool lockTaken = false;
try {
gate.Enter(ref lockTaken);
if (dequing) {
// Ensure Capacity
if (waitingList.Length == waitingListCount) {
var newLength = waitingListCount * 2;
if ((uint)newLength > MaxArrayLength) newLength = MaxArrayLength;
var newArray = new Action[newLength];
Array.Copy(waitingList, newArray, waitingListCount);
waitingList = newArray;
}
waitingList[waitingListCount] = continuation;
waitingListCount++;
} else {
// Ensure Capacity
if (actionList.Length == actionListCount) {
var newLength = actionListCount * 2;
if ((uint)newLength > MaxArrayLength) newLength = MaxArrayLength;
var newArray = new Action[newLength];
Array.Copy(actionList, newArray, actionListCount);
actionList = newArray;
}
actionList[actionListCount] = continuation;
actionListCount++;
}
} finally {
if (lockTaken) gate.Exit(false);
}
}
public void SetParamValue(string variableName, string paramValue, object value)
{
if (_syncVariables.Contains(variableName))
{
_syncVarLock.EnterWriteLock();
this._variables[variableName] = SetParamValue(paramValue, _variables[variableName], value);
_syncVarLock.ExitWriteLock();
}
else
{
this._variables[variableName] = SetParamValue(paramValue, _variables[variableName], value);
}
// 监视变量值如果被更新，则添加到值更新列表中，在状态上报时上传该值
if (_context.TraceVariables.Contains(variableName))
{
bool getlock = false;
_keyVarLock.Enter(ref getlock);
_keyVariables.Add(variableName);
_keyVarLock.Exit();
}
}
public void Enqueue(T item)
{
var lockTaken = false;
try
{
_sync.Enter(ref lockTaken);
if (_consumer.TryDequeue(out var tcs))
{
Debug.Assert(_producer.Count == 0);
tcs.TrySetResult(item);
}
else
{
_producer.Enqueue(item);
}
}
finally
{
_sync.Exit(false);
}
}
//TODO: SPEED UP THESE ENQUEUES!
/// <summary>
/// Enqueues an element to the tail of the queue with locking.
/// </summary>
/// <param name="item">Dequeued element, if any.</param>
/// <returns>True if an element could be dequeued, false otherwise.</returns>
public void Enqueue(T item)
{
//bool taken = false;
//locker.Enter(ref taken);
locker.Enter();
try
{
//Enqueues go to the tail only; it's like a queue.
//head ----> tail
if (count == array.Length)
{
//Resize
//TODO: Better shift-resize
T[] oldArray = array;
array = new T[Math.Max(4, oldArray.Length * 2)];
//Copy the old first-end to the first part of the new array.
Array.Copy(oldArray, firstIndex, array, 0, oldArray.Length - firstIndex);
//Copy the old begin-first to the second part of the new array.
Array.Copy(oldArray, 0, array, oldArray.Length - firstIndex, firstIndex);
firstIndex = 0;
lastIndex = count - 1;
}
lastIndex++;
if (lastIndex == array.Length)
{
lastIndex = 0;
}
array[lastIndex] = item;
count++;
}
finally
{
//Console.WriteLine("file: ConcurrentDeque, line: {0}", 80);
locker.Exit();
}
}
/// <summary>
/// AutoRegister method could be very complicated if it should call generic Register method...
/// No sanity checks, called from inside.
/// </summary>
private void InternalRegister(Type interfaceType, Func <object> getInstanceFunc, List <Type> otherTypesWeAreDependingOn)
{
RegisteredTypeContainer c = new RegisteredTypeContainer(this, interfaceType, getInstanceFunc, otherTypesWeAreDependingOn);
bool gotLock = false;
try
{
syncRoot.Enter(ref gotLock);
registeredTypes[interfaceType] = c;
}
finally
{
if (gotLock)
{
syncRoot.Exit();
}
}
System.Diagnostics.Debug.WriteLine("{0} registered for {1} with dependencies: {2}", getInstanceFunc.Method.ToString(), interfaceType.ToString(), (otherTypesWeAreDependingOn != null) ? String.Join(", ", otherTypesWeAreDependingOn.ToList().Select(t => t.ToString()).ToArray()) : "-"); //LOCSTR
}
// 异步flush的代码
private void FlushCallBack(object obj)
{
bool getLock = false;
try
{
WriteLock.Enter(ref getLock);
if (NoDataInStream == _hasDataInStream)
{
return;
}
LogStream.Flush();
Thread.VolatileWrite(ref _hasDataInStream, NoDataInStream);
}
finally
{
if (getLock)
{
WriteLock.Exit();
}
}
}
/// <summary>
///
/// </summary>
public void UpdateSlice(T dataT)
{
if (m_MultiThreadedCall == false && dataT.InLockProcessSlice() == false)
{
return;
}
m_LockSliceQueue.Enter();
{
m_SliceQueue.Enqueue(dataT);
}
m_LockSliceQueue.Exit();
}
private void TryComplete()
{
var lockTaken = false;
_lock.Enter(ref lockTaken);
if (_isFileWriterProcessorFinished && _isTreeWriterInfoTaskProcessorFinished)
{
Completed();
}
_lock.Exit();
}
public virtual Type CreateType(Type interfaceType, Type dynamicProxyBaseType)
{
Type ret;
if (interfaceType == null)
{
throw new ArgumentNullException("interfaceType");
}
if (dynamicProxyBaseType == null)
{
throw new ArgumentNullException("dynamicProxyBaseType");
}
if (!TypeHelper.IsSubclassOf(dynamicProxyBaseType, typeof(DynamicProxy)))
{
throw new ArgumentException("dynamicProxyType must be a child of DynamicProxy"); //LOCSTR
}
string typeName = string.Concat(ownClassName, "+", interfaceType.FullName);
bool gotLock = false;
try
{
dynamicTypeEmitSyncRoot.Enter(ref gotLock);
dynamicTypes.TryGetValue(typeName, out ret);
if (ret == null)
{
TypeBuilder tb = moduleBuilder.DefineType(typeName, TypeAttributes.Public);
tb.SetParent(dynamicProxyBaseType);
tb.AddInterfaceImplementation(interfaceType);
CreateConstructorBaseCalls(dynamicProxyBaseType, tb);
DynamicImplementInterface(new List <Type> {
interfaceType
}, new List <string>(), interfaceType, tb);
ret = tb.CreateType();
dynamicTypes.Add(typeName, ret);
}
}
finally
{
if (gotLock)
{
dynamicTypeEmitSyncRoot.Exit();
}
}
return(ret);
}
public void RunBenchmark()
{
int x = 0;
const int iteration = 10000000;
Stopwatch sw = Stopwatch.StartNew();
for (int i = 0; i < iteration; ++i)
{
++x;
}
Console.WriteLine("{0:N0}", sw.ElapsedMilliseconds);
sw.Restart();
for (int i = 0; i < iteration; ++i)
{
DoNothing();
x++;
DoNothing();
}
Console.WriteLine(sw.ElapsedMilliseconds);
SpinLock sl = new SpinLock(false);
sw.Restart();
for (int i = 0; i < iteration; ++i)
{
bool taken = false;
sl.Enter(ref taken);
x++;
sl.Exit();
}
Console.WriteLine(sw.ElapsedMilliseconds);
using (SimpleWaitLock simpleWaitLock = new SimpleWaitLock())
{
sw.Restart();
for (int i = 0; i < iteration; ++i)
{
simpleWaitLock.Enter();
x++;
simpleWaitLock.Leave();
}
Console.WriteLine(sw.ElapsedMilliseconds);
}
}
public static void TestMethod2()
{
/*
* 在实际的编程中需要注意的是：不要将SpinLock声明为只读字段，
* 如果声明为只读字段，会导致每次调用都会返回一个SpinLock新副本，
* 在多线程下，每个方法都会成功获得锁，而受到保护的临界区不会按照预期进行串行化。
*
*/
SpinLock sl = new SpinLock();
CookTasks = new Task[Particpants];
Thread.Sleep(4000);
Stopwatch swTask1 = new Stopwatch();
swTask1.Start();
for (var taskIndex = 0; taskIndex < Particpants; taskIndex++)
{
CookTasks[taskIndex] = Task.Factory.StartNew((num) =>
{
Parallel.For(1, 200000, (i) =>
{
var str = "append message " + i;
bool lockTaken = false;
try
{
sl.Enter(ref lockTaken);
AppendStrMonitorLock.Append(str);
}
finally
{
if (lockTaken)
{
sl.Exit();
}
}
});
}, taskIndex);
}
/*ContinueWhenAll 提供一组任务完成后 延续方法*/
var finalTask = Task.Factory.ContinueWhenAll(CookTasks, (tasks) =>
{
/*等待任务完成*/
Task.WaitAll(CookTasks);
swTask1.Stop();
Console.WriteLine($"采用SpinLock操作,字符串长度：{AppendStrMonitorLock.Length}，耗时：{swTask1.ElapsedMilliseconds}");
/*释放资源*/
});
Console.ReadLine();
}
public void QueueWorkItem([NotNull][Pooled] Action workItem)
{
bool lockTaken = false;
bool startNewTask = false;
PooledDelegateHelper.AddReference(workItem);
try
{
spinLock.Enter(ref lockTaken);
workItems.Enqueue(workItem);
workAvailable.Set();
// We're only locking when potentially increasing aliveCount as we
// don't want to go above our maximum amount of threads.
int curBusyCount = Interlocked.CompareExchange(ref busyCount, 0, 0);
int curAliveCount = Interlocked.CompareExchange(ref aliveCount, 0, 0);
if (curBusyCount + 1 >= curAliveCount && curAliveCount < maxThreadCount)
{
// Start threads as busy otherwise only one thread will be created
// when calling this function multiple times in a row
Interlocked.Increment(ref busyCount);
Interlocked.Increment(ref aliveCount);
startNewTask = true;
}
}
finally
{
if (lockTaken)
{
spinLock.Exit(true);
}
}
// No point in wasting spins on the lock while creating the task
if (startNewTask)
{
new Task(cachedTaskLoop, null, TaskCreationOptions.LongRunning).Start();
}
}
/// <summary>
/// Test TryEnter invalid cases
/// </summary>
/// <returns>True if succeeded, false otherwise</returns>
private static void RunSpinLockTest3_TryEnter(bool enableThreadIDs)
{
Exception exception = null;
SpinLock slock = new SpinLock(enableThreadIDs);
bool lockTaken = false;
#region Recursive lock
if (enableThreadIDs) // only valid if thread IDs are on
{
// Test recursive locks
slock.Enter(ref lockTaken);
try
{
if (lockTaken)
{
bool dummy = false;
// reacquire the lock
slock.Enter(ref dummy);
}
}
catch (Exception ex)
{
// LockRecursionException must be thrown
exception = ex;
}
if (lockTaken)
{
slock.Exit();
if (exception == null || exception.GetType() != typeof(LockRecursionException))
{
Assert.True(false, string.Format("SpinLock.TryEnter() failed, recursive locks without exception"));
}
if (slock.IsHeldByCurrentThread)
{
Assert.True(false, string.Format("SpinLock.TryEnter() failed, IsHeld is true after calling Exit"));
}
}
else
{
Assert.True(false, string.Format("LockRecursionException was not thrown?"));
}
}
#endregion
#region timeout > int.max
// Test invalid argument handling, too long timeout
exception = null;
try
{
lockTaken = false;
slock.TryEnter(TimeSpan.MaxValue, ref lockTaken);
}
catch (Exception ex)
{
exception = ex;
}
if (exception == null || exception.GetType() != typeof(ArgumentOutOfRangeException))
{
Assert.True(false, string.Format(@"SpinLock.TryEnter() failed, timeout.Totalmilliseconds > int.maxValue
without throwing ArgumentOutOfRangeException " + exception));
}
#endregion
#region Timeout > int.max
// Test invalid argument handling, timeout < -1
exception = null;
try
{
lockTaken = false;
slock.TryEnter(-2, ref lockTaken);
}
catch (Exception ex)
{
exception = ex;
}
if (exception == null || exception.GetType() != typeof(ArgumentOutOfRangeException))
{
Assert.True(false, string.Format(@"SpinLock.TryEnter() failed, timeout < -1
without throwing ArgumentOutOfRangeException"));
}
#endregion
}
public static void RunSpinLockTestExceptions()
{
SpinLock slock = new SpinLock();
bool isTaken = true;
Assert.Throws<ArgumentException>(() => slock.Enter(ref isTaken));
// Failure Case: Enter didn't throw AE when isTaken is true
slock = new SpinLock(false);
Assert.Throws<InvalidOperationException>(() => { bool iHeld = slock.IsHeldByCurrentThread; });
// Failure Case: IsHeldByCurrentThread didn't throw IOE when the thread tracking is disabled
}
/// <summary>
/// Test Exit
/// </summary>
/// <returns>True if succeeded, false otherwise</returns>
private static void RunSpinLockTest4_Exit(bool enableThreadIDs)
{
SpinLock slock = new SpinLock(enableThreadIDs);
bool lockTaken = false;
slock.Enter(ref lockTaken);
slock.Exit();
if (enableThreadIDs)
{
Assert.False(slock.IsHeldByCurrentThread);
Assert.Throws<SynchronizationLockException>(() => slock.Exit(true));
Assert.Throws<SynchronizationLockException>(() => slock.Exit(false));
}
else
{
Assert.False(slock.IsHeld);
}
}
/// <summary>
/// Test TryEnter invalid cases
/// </summary>
/// <returns>True if succeeded, false otherwise</returns>
private static void RunSpinLockTest3_TryEnter(bool enableThreadIDs)
{
SpinLock slock = new SpinLock(enableThreadIDs);
bool lockTaken = false;
#region Recursive lock
if (enableThreadIDs) // only valid if thread IDs are on
{
// Test recursive locks
slock.Enter(ref lockTaken);
Assert.True(lockTaken);
Assert.Throws<LockRecursionException>(() => { bool dummy = false; slock.Enter(ref dummy); });
slock.Exit();
Assert.False(slock.IsHeldByCurrentThread);
}
#endregion
#region timeout > int.max
// Test invalid argument handling, too long timeout
Assert.Throws<ArgumentOutOfRangeException>(() => { bool lt = false; slock.TryEnter(TimeSpan.MaxValue, ref lt); });
#endregion timeout > int.max
#region Timeout > int.max
// Test invalid argument handling, timeout < -1
Assert.Throws<ArgumentOutOfRangeException>(() => { bool lt = false; slock.TryEnter(-2, ref lt); });
#endregion Timeout > int.max
}
/// <summary>
/// Test Exit
/// </summary>
/// <returns>True if succeeded, false otherwise</returns>
private static void RunSpinLockTest4_Exit(bool enableThreadIDs)
{
Exception exception = null;
SpinLock slock = new SpinLock(enableThreadIDs);
bool lockTaken = false;
slock.Enter(ref lockTaken);
slock.Exit();
if (enableThreadIDs)
{
if (slock.IsHeldByCurrentThread)
{
Assert.True(false, string.Format("SpinLock.Exit() failed, IsHeld is true after calling Exit"));
}
}
else
{
if (slock.IsHeld)
{
Assert.True(false, string.Format("SpinLock.Exit() failed, IsHeld is true after calling Exit"));
}
}
for (int i = 0; i < 2; i++)
{
bool useBarrier = i == 0;
// Calling Exit without owning the lock
try
{
slock.Exit(useBarrier);
}
catch (Exception ex)
{
// SynchronizationLockException must be thrown
exception = ex;
}
}
if (enableThreadIDs)
{
if (exception == null || exception.GetType() != typeof(SynchronizationLockException))
{
Assert.True(false, string.Format(@"SpinLock.Exit() failed, calling Exit without owning the lock"));
}
}
}
