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DetectBlockingSynchronizationContext.cs
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DetectBlockingSynchronizationContext.cs
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using System;
using System.Threading;
namespace Ben.Diagnostics
{
// Tips of the Toub
internal sealed class DetectBlockingSynchronizationContext : SynchronizationContext
{
private readonly BlockingMonitor _monitor;
private readonly SynchronizationContext _syncCtx;
public DetectBlockingSynchronizationContext(BlockingMonitor monitor)
{
_monitor = monitor;
SetWaitNotificationRequired();
}
public DetectBlockingSynchronizationContext(BlockingMonitor monitor, SynchronizationContext syncCtx) : this(monitor)
{
_syncCtx = syncCtx;
}
public override int Wait(IntPtr[] waitHandles, bool waitAll, int millisecondsTimeout)
{
if (millisecondsTimeout == 0)
{
return WaitInternal(waitHandles, waitAll, millisecondsTimeout);
}
else
{
_monitor.BlockingStart(DectectionSource.SynchronizationContext);
try
{
return WaitInternal(waitHandles, waitAll, millisecondsTimeout);
}
finally
{
_monitor.BlockingEnd();
}
}
}
private int WaitInternal(IntPtr[] waitHandles, bool waitAll, int millisecondsTimeout)
{
if (_syncCtx != null)
{
return _syncCtx.Wait(waitHandles, waitAll, millisecondsTimeout);
}
else
{
return base.Wait(waitHandles, waitAll, millisecondsTimeout);
}
}
}
}