public void Dispose()
{
if (_signal == null)
{
return;
}
BCLDebug.Assert(Thread.CurrentThread == _signal.Thread, "You called Dispose on the wrong thread, or reused your cancellation signal?");
List <CancellationSignal> signals = _signal.Thread.CancellationSignals;
bool tookLock = false;
RuntimeHelpers.PrepareConstrainedRegions();
try {
Monitor.ReliableEnter(signals, out tookLock);
CancellationSignal s = signals[signals.Count - 1];
signals.RemoveAt(signals.Count - 1);
if (!Object.ReferenceEquals(s, _signal))
{
throw new InvalidOperationException(Environment.GetResourceString("InvalidOperation_CancellationRegionLeak"));
}
_signal.Thread = null;
_signal = null;
}
finally {
if (tookLock)
{
Monitor.Exit(signals);
}
Thread.EndThreadAffinity();
}
}
public void Dispose()
{
if (_signal == null)
return;
BCLDebug.Assert(Thread.CurrentThread == _signal.Thread, "You called Dispose on the wrong thread, or reused your cancellation signal?");
List<CancellationSignal> signals = _signal.Thread.CancellationSignals;
bool tookLock = false;
RuntimeHelpers.PrepareConstrainedRegions();
try {
Monitor.ReliableEnter(signals, out tookLock);
CancellationSignal s = signals[signals.Count - 1];
signals.RemoveAt(signals.Count - 1);
if (!Object.ReferenceEquals(s, _signal))
throw new InvalidOperationException(Environment.GetResourceString("InvalidOperation_CancellationRegionLeak"));
_signal.Thread = null;
_signal = null;
}
finally {
if (tookLock)
Monitor.Exit(signals);
Thread.EndThreadAffinity();
}
}
public override async Task<FingerprintAuthenticationResult> AuthenticateNoDialogAsync(IAuthenticationFailedListener failedListener, CancellationToken cancellationToken)
{
using (var cancellationSignal = new CancellationSignal())
using (cancellationToken.Register(() => cancellationSignal.Cancel()))
{
var callback = new FingerprintAuthenticationCallback(failedListener);
GetService().Authenticate(null, cancellationSignal, FingerprintAuthenticationFlags.None, callback, null);
return await callback.GetTask();
}
}
public static CancellationRegion SetNonCancelable()
{
CancellationSignal signal = new CancellationSignal(false);
Thread t = Thread.CurrentThread;
signal.Thread = t;
List<CancellationSignal> signals = t.CancellationSignals;
CancellationRegion region = new CancellationRegion(signal);
lock(signals) {
signals.Add(signal);
// Note that all failures due to allocations will be above
// this point in this method. Also, note that it's fine to
// Add first then get thread affinity later - the Cancel
// method holds this same lock while cancelling.
// Ensure that another fiber cannot run on this thread.
Thread.BeginThreadAffinity();
}
return region;
}
public static CancellationRegion SetNonCancelable()
{
CancellationSignal signal = new CancellationSignal(false);
Thread t = Thread.CurrentThread;
signal.Thread = t;
List <CancellationSignal> signals = t.CancellationSignals;
CancellationRegion region = new CancellationRegion(signal);
lock (signals) {
signals.Add(signal);
// Note that all failures due to allocations will be above
// this point in this method. Also, note that it's fine to
// Add first then get thread affinity later - the Cancel
// method holds this same lock while cancelling.
// Ensure that another fiber cannot run on this thread.
Thread.BeginThreadAffinity();
}
return(region);
}
private CancellationRegion(CancellationSignal signal)
{
BCLDebug.Assert(signal != null, "Must have a cancelation signal instance.");
_signal = signal;
}
private CancellationRegion(CancellationSignal signal)
{
BCLDebug.Assert(signal != null, "Must have a cancelation signal instance.");
_signal = signal;
}
