public static CancellationTokenSource CreateLinkedTokenSource(CancellationToken token1, CancellationToken token2)
{
CancellationTokenSource state = new CancellationTokenSource();
if (token1.CanBeCanceled)
{
state.m_linkingRegistrations = new List <CancellationTokenRegistration>();
state.m_linkingRegistrations.Add(token1.InternalRegisterWithoutEC(s_LinkedTokenCancelDelegate, state));
}
if (token2.CanBeCanceled)
{
if (state.m_linkingRegistrations == null)
{
state.m_linkingRegistrations = new List <CancellationTokenRegistration>();
}
state.m_linkingRegistrations.Add(token2.InternalRegisterWithoutEC(s_LinkedTokenCancelDelegate, state));
}
return(state);
}
public static CancellationTokenSource CreateLinkedTokenSource(CancellationToken token1, CancellationToken token2)
{
CancellationTokenSource cancellationTokenSource = new CancellationTokenSource();
bool canBeCanceled = token2.CanBeCanceled;
if (token1.CanBeCanceled)
{
cancellationTokenSource.m_linkingRegistrations = new CancellationTokenRegistration[canBeCanceled ? 2 : 1];
cancellationTokenSource.m_linkingRegistrations[0] = token1.InternalRegisterWithoutEC(CancellationTokenSource.s_LinkedTokenCancelDelegate, (object)cancellationTokenSource);
}
if (canBeCanceled)
{
int index = 1;
if (cancellationTokenSource.m_linkingRegistrations == null)
{
cancellationTokenSource.m_linkingRegistrations = new CancellationTokenRegistration[1];
index = 0;
}
cancellationTokenSource.m_linkingRegistrations[index] = token2.InternalRegisterWithoutEC(CancellationTokenSource.s_LinkedTokenCancelDelegate, (object)cancellationTokenSource);
}
return(cancellationTokenSource);
}
/// <summary>
/// Blocks the current thread until the current <see cref="ManualResetEventSlim"/> is set, using a
/// 32-bit signed integer to measure the time interval, while observing a <see
/// cref="T:System.Threading.CancellationToken"/>.
/// </summary>
/// <param name="millisecondsTimeout">The number of milliseconds to wait, or <see
/// cref="Timeout.Infinite"/>(-1) to wait indefinitely.</param>
/// <param name="cancellationToken">The <see cref="T:System.Threading.CancellationToken"/> to
/// observe.</param>
/// <returns>true if the <see cref="System.Threading.ManualResetEventSlim"/> was set; otherwise,
/// false.</returns>
/// <exception cref="T:System.ArgumentOutOfRangeException"><paramref name="millisecondsTimeout"/> is a
/// negative number other than -1, which represents an infinite time-out.</exception>
/// <exception cref="T:System.InvalidOperationException">
/// The maximum number of waiters has been exceeded.
/// </exception>
/// <exception cref="T:System.Threading.OperationCanceledException"><paramref
/// name="cancellationToken"/> was canceled.</exception>
public bool Wait(int millisecondsTimeout, CancellationToken cancellationToken)
{
ThrowIfDisposed();
cancellationToken.ThrowIfCancellationRequested(); // an early convenience check
if (millisecondsTimeout < -1)
{
throw new ArgumentOutOfRangeException(nameof(millisecondsTimeout));
}
if (!IsSet)
{
if (millisecondsTimeout == 0)
{
// For 0-timeouts, we just return immediately.
return(false);
}
// We spin briefly before falling back to allocating and/or waiting on a true event.
uint startTime = 0;
bool bNeedTimeoutAdjustment = false;
int realMillisecondsTimeout = millisecondsTimeout; //this will be adjusted if necessary.
if (millisecondsTimeout != Timeout.Infinite)
{
// We will account for time spent spinning, so that we can decrement it from our
// timeout. In most cases the time spent in this section will be negligible. But
// we can't discount the possibility of our thread being switched out for a lengthy
// period of time. The timeout adjustments only take effect when and if we actually
// decide to block in the kernel below.
startTime = TimeoutHelper.GetTime();
bNeedTimeoutAdjustment = true;
}
// Spin
int spinCount = SpinCount;
var spinner = new SpinWait();
while (spinner.Count < spinCount)
{
spinner.SpinOnce(SpinWait.Sleep1ThresholdForSpinBeforeWait);
if (IsSet)
{
return(true);
}
if (spinner.Count >= 100 && spinner.Count % 10 == 0) // check the cancellation token if the user passed a very large spin count
{
cancellationToken.ThrowIfCancellationRequested();
}
}
// Now enter the lock and wait.
EnsureLockObjectCreated();
// We must register and deregister the token outside of the lock, to avoid deadlocks.
using (cancellationToken.InternalRegisterWithoutEC(s_cancellationTokenCallback, this))
{
lock (m_lock)
{
// Loop to cope with spurious wakeups from other waits being canceled
while (!IsSet)
{
// If our token was canceled, we must throw and exit.
cancellationToken.ThrowIfCancellationRequested();
//update timeout (delays in wait commencement are due to spinning and/or spurious wakeups from other waits being canceled)
if (bNeedTimeoutAdjustment)
{
realMillisecondsTimeout = TimeoutHelper.UpdateTimeOut(startTime, millisecondsTimeout);
if (realMillisecondsTimeout <= 0)
{
return(false);
}
}
// There is a race condition that Set will fail to see that there are waiters as Set does not take the lock,
// so after updating waiters, we must check IsSet again.
// Also, we must ensure there cannot be any reordering of the assignment to Waiters and the
// read from IsSet. This is guaranteed as Waiters{set;} involves an Interlocked.CompareExchange
// operation which provides a full memory barrier.
// If we see IsSet=false, then we are guaranteed that Set() will see that we are
// waiting and will pulse the monitor correctly.
Waiters = Waiters + 1;
if (IsSet) //This check must occur after updating Waiters.
{
Waiters--; //revert the increment.
return(true);
}
// Now finally perform the wait.
try
{
// ** the actual wait **
if (!Monitor.Wait(m_lock, realMillisecondsTimeout))
{
return(false); //return immediately if the timeout has expired.
}
}
finally
{
// Clean up: we're done waiting.
Waiters = Waiters - 1;
}
// Now just loop back around, and the right thing will happen. Either:
// 1. We had a spurious wake-up due to some other wait being canceled via a different cancellationToken (rewait)
// or 2. the wait was successful. (the loop will break)
}
}
}
} // automatically disposes (and deregisters) the callback
return(true); //done. The wait was satisfied.
}
public bool Wait(int millisecondsTimeout, CancellationToken cancellationToken)
{
this.ThrowIfDisposed();
cancellationToken.ThrowIfCancellationRequested();
if (millisecondsTimeout < -1)
{
throw new ArgumentOutOfRangeException("millisecondsTimeout");
}
if (!this.IsSet)
{
if (millisecondsTimeout == 0)
{
return(false);
}
uint startTime = 0;
bool flag = false;
int millisecondsTimeout1 = millisecondsTimeout;
if (millisecondsTimeout != -1)
{
startTime = TimeoutHelper.GetTime();
flag = true;
}
int num1 = 10;
int num2 = 5;
int num3 = 20;
int spinCount = this.SpinCount;
for (int index = 0; index < spinCount; ++index)
{
if (this.IsSet)
{
return(true);
}
if (index < num1)
{
if (index == num1 / 2)
{
Thread.Yield();
}
else
{
Thread.SpinWait(PlatformHelper.ProcessorCount * (4 << index));
}
}
else if (index % num3 == 0)
{
Thread.Sleep(1);
}
else if (index % num2 == 0)
{
Thread.Sleep(0);
}
else
{
Thread.Yield();
}
if (index >= 100 && index % 10 == 0)
{
cancellationToken.ThrowIfCancellationRequested();
}
}
this.EnsureLockObjectCreated();
using (cancellationToken.InternalRegisterWithoutEC(ManualResetEventSlim.s_cancellationTokenCallback, (object)this))
{
lock (this.m_lock)
{
while (!this.IsSet)
{
cancellationToken.ThrowIfCancellationRequested();
if (flag)
{
millisecondsTimeout1 = TimeoutHelper.UpdateTimeOut(startTime, millisecondsTimeout);
if (millisecondsTimeout1 <= 0)
{
return(false);
}
}
this.Waiters = this.Waiters + 1;
if (this.IsSet)
{
this.Waiters = this.Waiters - 1;
return(true);
}
try
{
if (!Monitor.Wait(this.m_lock, millisecondsTimeout1))
{
return(false);
}
}
finally
{
this.Waiters = this.Waiters - 1;
}
}
}
}
}
return(true);
}
/// <summary>
/// Blocks the current thread until the current <see cref="ManualResetEventSlim"/> is set, using a
/// 32-bit signed integer to measure the time interval, while observing a <see
/// cref="T:System.Threading.CancellationToken"/>.
/// </summary>
/// <param name="millisecondsTimeout">The number of milliseconds to wait, or <see
/// cref="Timeout.Infinite"/>(-1) to wait indefinitely.</param>
/// <param name="cancellationToken">The <see cref="T:System.Threading.CancellationToken"/> to
/// observe.</param>
/// <returns>true if the <see cref="System.Threading.ManualResetEventSlim"/> was set; otherwise,
/// false.</returns>
/// <exception cref="T:System.ArgumentOutOfRangeException"><paramref name="millisecondsTimeout"/> is a
/// negative number other than -1, which represents an infinite time-out.</exception>
/// <exception cref="T:System.InvalidOperationException">
/// The maximum number of waiters has been exceeded.
/// </exception>
/// <exception cref="T:System.Threading.OperationCanceledException"><paramref
/// name="cancellationToken"/> was canceled.</exception>
public bool Wait(int millisecondsTimeout, CancellationToken cancellationToken)
{
ThrowIfDisposed();
cancellationToken.ThrowIfCancellationRequested(); // an early convenience check
if (millisecondsTimeout < -1)
{
throw new ArgumentOutOfRangeException("millisecondsTimeout");
}
if (!IsSet)
{
if (millisecondsTimeout == 0)
{
// For 0-timeouts, we just return immediately.
return false;
}
// We spin briefly before falling back to allocating and/or waiting on a true event.
uint startTime = 0;
bool bNeedTimeoutAdjustment = false;
int realMillisecondsTimeout = millisecondsTimeout; //this will be adjusted if necessary.
if (millisecondsTimeout != Timeout.Infinite)
{
// We will account for time spent spinning, so that we can decrement it from our
// timeout. In most cases the time spent in this section will be negligible. But
// we can't discount the possibility of our thread being switched out for a lengthy
// period of time. The timeout adjustments only take effect when and if we actually
// decide to block in the kernel below.
startTime = TimeoutHelper.GetTime();
bNeedTimeoutAdjustment = true;
}
//spin
int HOW_MANY_SPIN_BEFORE_YIELD = 10;
int HOW_MANY_YIELD_EVERY_SLEEP_0 = 5;
int HOW_MANY_YIELD_EVERY_SLEEP_1 = 20;
int spinCount = SpinCount;
for (int i = 0; i < spinCount; i++)
{
if (IsSet)
{
return true;
}
else if (i < HOW_MANY_SPIN_BEFORE_YIELD)
{
if (i == HOW_MANY_SPIN_BEFORE_YIELD / 2)
{
SpinWait.Yield();
}
else
{
SpinWait.Spin(PlatformHelper.ProcessorCount * (4 << i));
}
}
else if (i % HOW_MANY_YIELD_EVERY_SLEEP_1 == 0)
{
Helpers.Sleep(1);
}
else if (i % HOW_MANY_YIELD_EVERY_SLEEP_0 == 0)
{
Helpers.Sleep(0);
}
else
{
SpinWait.Yield();
}
if (i >= 100 && i % 10 == 0) // check the cancellation token if the user passed a very large spin count
cancellationToken.ThrowIfCancellationRequested();
}
// Now enter the lock and wait.
EnsureLockObjectCreated();
// We must register and deregister the token outside of the lock, to avoid deadlocks.
using (cancellationToken.InternalRegisterWithoutEC(s_cancellationTokenCallback, this))
{
lock (m_lock)
{
// Loop to cope with spurious wakeups from other waits being canceled
while (!IsSet)
{
// If our token was canceled, we must throw and exit.
cancellationToken.ThrowIfCancellationRequested();
//update timeout (delays in wait commencement are due to spinning and/or spurious wakeups from other waits being canceled)
if (bNeedTimeoutAdjustment)
{
realMillisecondsTimeout = TimeoutHelper.UpdateTimeOut(startTime, millisecondsTimeout);
if (realMillisecondsTimeout <= 0)
return false;
}
// There is a race that Set will fail to see that there are waiters as Set does not take the lock,
// so after updating waiters, we must check IsSet again.
// Also, we must ensure there cannot be any reordering of the assignment to Waiters and the
// read from IsSet. This is guaranteed as Waiters{set;} involves an Interlocked.CompareExchange
// operation which provides a full memory barrier.
// If we see IsSet=false, then we are guaranteed that Set() will see that we are
// waiting and will pulse the monitor correctly.
Waiters = Waiters + 1;
if (IsSet) //This check must occur after updating Waiters.
{
Waiters--; //revert the increment.
return true;
}
// Now finally perform the wait.
try
{
// ** the actual wait **
if (!m_condition.Wait(realMillisecondsTimeout))
return false; //return immediately if the timeout has expired.
}
finally
{
// Clean up: we're done waiting.
Waiters = Waiters - 1;
}
// Now just loop back around, and the right thing will happen. Either:
// 1. We had a spurious wake-up due to some other wait being canceled via a different cancellationToken (rewait)
// or 2. the wait was successful. (the loop will break)
}
}
}
} // automatically disposes (and deregisters) the callback
return true; //done. The wait was satisfied.
}
/// <summary>
/// Blocks the current thread until it can enter the <see cref="SemaphoreSlim"/>,
/// using a 32-bit signed integer to measure the time interval,
/// while observing a <see cref="T:System.Threading.CancellationToken"/>.
/// </summary>
/// <param name="millisecondsTimeout">The number of milliseconds to wait, or <see cref="Timeout.Infinite"/>(-1) to
/// wait indefinitely.</param>
/// <param name="cancellationToken">The <see cref="T:System.Threading.CancellationToken"/> to observe.</param>
/// <returns>true if the current thread successfully entered the <see cref="SemaphoreSlim"/>; otherwise, false.</returns>
/// <exception cref="ArgumentOutOfRangeException"><paramref name="millisecondsTimeout"/> is a negative number other than -1,
/// which represents an infinite time-out.</exception>
/// <exception cref="System.OperationCanceledException"><paramref name="cancellationToken"/> was canceled.</exception>
public bool Wait(int millisecondsTimeout, CancellationToken cancellationToken)
{
CheckDispose();
// Validate input
if (millisecondsTimeout < -1)
{
throw new ArgumentOutOfRangeException(
"totalMilliSeconds", millisecondsTimeout, SR.SemaphoreSlim_Wait_TimeoutWrong);
}
cancellationToken.ThrowIfCancellationRequested();
uint startTime = 0;
if (millisecondsTimeout != Timeout.Infinite && millisecondsTimeout > 0)
{
startTime = TimeoutHelper.GetTime();
}
bool waitSuccessful = false;
Task <bool> asyncWaitTask = null;
bool lockTaken = false;
//Register for cancellation outside of the main lock.
//NOTE: Register/deregister inside the lock can deadlock as different lock acquisition orders could
// occur for (1)this.m_lockObj and (2)cts.internalLock
CancellationTokenRegistration cancellationTokenRegistration = cancellationToken.InternalRegisterWithoutEC(s_cancellationTokenCanceledEventHandler, this);
try
{
// Perf: first spin wait for the count to be positive, but only up to the first planned yield.
// This additional amount of spinwaiting in addition
// to Monitor.Enter()’s spinwaiting has shown measurable perf gains in test scenarios.
//
SpinWait spin = new SpinWait();
while (m_currentCount == 0 && !spin.NextSpinWillYield)
{
spin.SpinOnce();
}
// entering the lock and incrementing waiters must not suffer a thread-abort, else we cannot
// clean up m_waitCount correctly, which may lead to deadlock due to non-woken waiters.
try { }
finally
{
m_lock.Acquire();
lockTaken = true;
if (lockTaken)
{
m_waitCount++;
}
}
// If there are any async waiters, for fairness we'll get in line behind
// then by translating our synchronous wait into an asynchronous one that we
// then block on (once we've released the lock).
if (m_asyncHead != null)
{
Debug.Assert(m_asyncTail != null, "tail should not be null if head isn't");
asyncWaitTask = WaitAsync(millisecondsTimeout, cancellationToken);
}
// There are no async waiters, so we can proceed with normal synchronous waiting.
else
{
// If the count > 0 we are good to move on.
// If not, then wait if we were given allowed some wait duration
OperationCanceledException oce = null;
if (m_currentCount == 0)
{
if (millisecondsTimeout == 0)
{
return(false);
}
// Prepare for the main wait...
// wait until the count become greater than zero or the timeout is expired
try
{
waitSuccessful = WaitUntilCountOrTimeout(millisecondsTimeout, startTime, cancellationToken);
}
catch (OperationCanceledException e) { oce = e; }
}
// Now try to acquire. We prioritize acquisition over cancellation/timeout so that we don't
// lose any counts when there are asynchronous waiters in the mix. Asynchronous waiters
// defer to synchronous waiters in priority, which means that if it's possible an asynchronous
// waiter didn't get released because a synchronous waiter was present, we need to ensure
// that synchronous waiter succeeds so that they have a chance to release.
Debug.Assert(!waitSuccessful || m_currentCount > 0,
"If the wait was successful, there should be count available.");
if (m_currentCount > 0)
{
waitSuccessful = true;
m_currentCount--;
}
else if (oce != null)
{
throw oce;
}
// Exposing wait handle which is lazily initialized if needed
if (m_waitHandle != null && m_currentCount == 0)
{
m_waitHandle.Reset();
}
}
}
finally
{
// Release the lock
if (lockTaken)
{
m_waitCount--;
m_lock.Release();
}
// Unregister the cancellation callback.
cancellationTokenRegistration.Dispose();
}
// If we had to fall back to asynchronous waiting, block on it
// here now that we've released the lock, and return its
// result when available. Otherwise, this was a synchronous
// wait, and whether we successfully acquired the semaphore is
// stored in waitSuccessful.
return((asyncWaitTask != null) ? asyncWaitTask.GetAwaiter().GetResult() : waitSuccessful);
}
public static CancellationTokenSource CreateLinkedTokenSource(CancellationToken token1, CancellationToken token2)
{
CancellationTokenSource state = new CancellationTokenSource();
if (token1.CanBeCanceled)
{
state.m_linkingRegistrations = new List<CancellationTokenRegistration>();
state.m_linkingRegistrations.Add(token1.InternalRegisterWithoutEC(s_LinkedTokenCancelDelegate, state));
}
if (token2.CanBeCanceled)
{
if (state.m_linkingRegistrations == null)
{
state.m_linkingRegistrations = new List<CancellationTokenRegistration>();
}
state.m_linkingRegistrations.Add(token2.InternalRegisterWithoutEC(s_LinkedTokenCancelDelegate, state));
}
return state;
}
public bool Wait(int millisecondsTimeout, CancellationToken cancellationToken)
{
this.CheckDispose();
if (millisecondsTimeout < -1)
{
throw new ArgumentOutOfRangeException("totalMilliSeconds", millisecondsTimeout, SemaphoreSlim.GetResourceString("SemaphoreSlim_Wait_TimeoutWrong"));
}
cancellationToken.ThrowIfCancellationRequested();
uint startTime = 0U;
if (millisecondsTimeout != -1 && millisecondsTimeout > 0)
{
startTime = TimeoutHelper.GetTime();
}
bool result = false;
Task <bool> task = null;
bool flag = false;
CancellationTokenRegistration cancellationTokenRegistration = cancellationToken.InternalRegisterWithoutEC(SemaphoreSlim.s_cancellationTokenCanceledEventHandler, this);
try
{
SpinWait spinWait = default(SpinWait);
while (this.m_currentCount == 0 && !spinWait.NextSpinWillYield)
{
spinWait.SpinOnce();
}
try
{
}
finally
{
Monitor.Enter(this.m_lockObj, ref flag);
if (flag)
{
this.m_waitCount++;
}
}
if (this.m_asyncHead != null)
{
task = this.WaitAsync(millisecondsTimeout, cancellationToken);
}
else
{
OperationCanceledException ex = null;
if (this.m_currentCount == 0)
{
if (millisecondsTimeout == 0)
{
return(false);
}
try
{
result = this.WaitUntilCountOrTimeout(millisecondsTimeout, startTime, cancellationToken);
}
catch (OperationCanceledException ex2)
{
ex = ex2;
}
}
if (this.m_currentCount > 0)
{
result = true;
this.m_currentCount--;
}
else if (ex != null)
{
throw ex;
}
if (this.m_waitHandle != null && this.m_currentCount == 0)
{
this.m_waitHandle.Reset();
}
}
}
finally
{
if (flag)
{
this.m_waitCount--;
Monitor.Exit(this.m_lockObj);
}
cancellationTokenRegistration.Dispose();
}
if (task == null)
{
return(result);
}
return(task.GetAwaiter().GetResult());
}
public bool Wait(int millisecondsTimeout, CancellationToken cancellationToken)
{
this.ThrowIfDisposed();
cancellationToken.ThrowIfCancellationRequested();
if (millisecondsTimeout < -1)
{
throw new ArgumentOutOfRangeException("millisecondsTimeout");
}
if (!this.IsSet)
{
if (millisecondsTimeout == 0)
{
return(false);
}
uint startTime = 0U;
bool flag = false;
int num = millisecondsTimeout;
if (millisecondsTimeout != -1)
{
startTime = TimeoutHelper.GetTime();
flag = true;
}
int num2 = 10;
int num3 = 5;
int num4 = 20;
int spinCount = this.SpinCount;
for (int i = 0; i < spinCount; i++)
{
if (this.IsSet)
{
return(true);
}
if (i < num2)
{
if (i == num2 / 2)
{
Thread.Yield();
}
else
{
Thread.SpinWait(4 << i);
}
}
else if (i % num4 == 0)
{
Thread.Sleep(1);
}
else if (i % num3 == 0)
{
Thread.Sleep(0);
}
else
{
Thread.Yield();
}
if (i >= 100 && i % 10 == 0)
{
cancellationToken.ThrowIfCancellationRequested();
}
}
this.EnsureLockObjectCreated();
using (cancellationToken.InternalRegisterWithoutEC(ManualResetEventSlim.s_cancellationTokenCallback, this))
{
object @lock = this.m_lock;
lock (@lock)
{
while (!this.IsSet)
{
cancellationToken.ThrowIfCancellationRequested();
if (flag)
{
num = TimeoutHelper.UpdateTimeOut(startTime, millisecondsTimeout);
if (num <= 0)
{
return(false);
}
}
this.Waiters++;
if (this.IsSet)
{
int waiters = this.Waiters;
this.Waiters = waiters - 1;
return(true);
}
try
{
if (!Monitor.Wait(this.m_lock, num))
{
return(false);
}
}
finally
{
this.Waiters--;
}
}
}
}
return(true);
}
return(true);
}
public bool Wait(int millisecondsTimeout, CancellationToken cancellationToken)
{
this.ThrowIfDisposed();
cancellationToken.ThrowIfCancellationRequested();
if (millisecondsTimeout < -1)
{
throw new ArgumentOutOfRangeException("millisecondsTimeout");
}
if (!this.IsSet)
{
if (millisecondsTimeout == 0)
{
return false;
}
uint startTime = 0u;
bool flag = false;
int num = millisecondsTimeout;
if (millisecondsTimeout != -1)
{
startTime = TimeoutHelper.GetTime();
flag = true;
}
int num2 = 10;
int num3 = 5;
int num4 = 20;
int spinCount = this.SpinCount;
for (int i = 0; i < spinCount; i++)
{
if (this.IsSet)
{
return true;
}
if (i < num2)
{
if (i == num2 / 2)
{
Thread.Sleep(0);
}
else
{
Thread.SpinWait(PlatformHelper.ProcessorCount * (4 << i));
}
}
else
{
if (i % num4 == 0)
{
Thread.Sleep(1);
}
else
{
Thread.Sleep(0);
//if (i % num3 == 0)
//{
// Thread.Sleep(0);
//}
//else
//{
// Thread.Sleep(0);
//}
}
}
if (i >= 100 && i % 10 == 0)
{
cancellationToken.ThrowIfCancellationRequested();
}
}
this.EnsureLockObjectCreated();
using (cancellationToken.InternalRegisterWithoutEC(ManualResetEventSlim.s_cancellationTokenCallback, this))
{
lock (this.m_lock)
{
while (!this.IsSet)
{
cancellationToken.ThrowIfCancellationRequested();
if (flag)
{
num = TimeoutHelper.UpdateTimeOut(startTime, millisecondsTimeout);
if (num <= 0)
{
bool result = false;
return result;
}
}
this.Waiters++;
if (this.IsSet)
{
this.Waiters--;
bool result = true;
return result;
}
try
{
if (!Monitor.Wait(this.m_lock, num))
{
bool result = false;
return result;
}
}
finally
{
this.Waiters--;
}
}
}
}
return true;
}
return true;
}
public static CancellationTokenSource CreateLinkedTokenSource(CancellationToken token1, CancellationToken token2)
{
CancellationTokenSource cancellationTokenSource = new CancellationTokenSource();
bool canBeCanceled = token2.CanBeCanceled;
if (token1.CanBeCanceled)
{
cancellationTokenSource.m_linkingRegistrations = new CancellationTokenRegistration[canBeCanceled ? 2 : 1];
cancellationTokenSource.m_linkingRegistrations[0] = token1.InternalRegisterWithoutEC(CancellationTokenSource.s_LinkedTokenCancelDelegate, cancellationTokenSource);
}
if (canBeCanceled)
{
int num = 1;
if (cancellationTokenSource.m_linkingRegistrations == null)
{
cancellationTokenSource.m_linkingRegistrations = new CancellationTokenRegistration[1];
num = 0;
}
cancellationTokenSource.m_linkingRegistrations[num] = token2.InternalRegisterWithoutEC(CancellationTokenSource.s_LinkedTokenCancelDelegate, cancellationTokenSource);
}
return cancellationTokenSource;
}
/// <summary>
/// Creates the linked token source.
/// </summary>
/// <param name="token1">The token1.</param>
/// <param name="token2">The token2.</param>
/// <returns></returns>
public static CancellationTokenSource CreateLinkedTokenSource(CancellationToken token1, CancellationToken token2)
{
var state = new CancellationTokenSource();
var canBeCanceled = token2.CanBeCanceled;
if (token1.CanBeCanceled)
{
state._linkingRegistrations = new CancellationTokenRegistration[canBeCanceled ? 2 : 1];
state._linkingRegistrations[0] = token1.InternalRegisterWithoutEC(_LinkedTokenCancelDelegate, state);
}
if (canBeCanceled)
{
var index = 1;
if (state._linkingRegistrations == null)
{
state._linkingRegistrations = new CancellationTokenRegistration[1];
index = 0;
}
state._linkingRegistrations[index] = token2.InternalRegisterWithoutEC(_LinkedTokenCancelDelegate, state);
}
return state;
}
