// handles not only the simple cast, but also value type widening, etc.
public static T Convert <T>(object source)
{
// first check the common cases
if (source is T)
{
return((T)source);
}
if (source == null)
{
if (typeof(T).IsValueType && !IsNullableType(typeof(T)))
{
throw Fx.Exception.AsError(new InvalidCastException(SRCore.CannotConvertObject(source, typeof(T))));
}
return(default(T));
}
T result;
if (TryNumericConversion <T>(source, out result))
{
return(result);
}
throw Fx.Exception.AsError(new InvalidCastException(SRCore.CannotConvertObject(source, typeof(T))));
}
public static Exception AssertAndFailFast(string description)
{
Fx.Assert(description);
string failFastMessage = SRCore.FailFastMessage(description);
// The catch is here to force the finally to run, as finallys don't run until the stack walk gets to a catch.
// The catch makes sure that the finally will run before the stack-walk leaves the frame, but the code inside is impossible to reach.
try
{
try
{
Fx.Exception.TraceFailFast(failFastMessage);
}
finally
{
Environment.FailFast(failFastMessage);
}
}
catch
{
throw;
}
return(null); // we'll never get here since we've just fail-fasted
}
public static void ThrowIfNonPositiveArgument(TimeSpan timeout, string argumentName)
{
if (timeout <= TimeSpan.Zero)
{
throw Fx.Exception.ArgumentOutOfRange(argumentName, timeout,
SRCore.TimeoutMustBePositive(argumentName, timeout));
}
}
public T Dequeue(TimeSpan timeout)
{
T value;
if (!this.Dequeue(timeout, out value))
{
throw Fx.Exception.AsError(new TimeoutException(SRCore.TimeoutInputQueueDequeue(timeout)));
}
return(value);
}
protected override void Invoke()
{
this.callback(this.state,
this.TimedOut ? new TimeoutException(SRCore.TimeoutOnOperation(this.originalTimeout)) : null);
}
public ArgumentException ArgumentNullOrEmpty(string paramName)
{
return(this.Argument(paramName, SRCore.ArgumentNullOrEmpty(paramName)));
}
public AssertionFailedException(string description)
: base(SRCore.ShipAssertExceptionMessage(description))
{
}
protected virtual Exception CreateQuotaExceededException(int maxSizeQuota)
{
return(new InvalidOperationException(SRCore.BufferedOutputStreamQuotaExceeded(maxSizeQuota)));
}
static void ThrowInvalidAsyncResult(IAsyncResult result)
{
throw Fx.Exception.AsError(new InvalidOperationException(SRCore.InvalidAsyncResultImplementation(result.GetType())));
}
protected void Complete(bool didCompleteSynchronously)
{
if (this.isCompleted)
{
throw Fx.Exception.AsError(new InvalidOperationException(SRCore.AsyncResultCompletedTwice(this.GetType())));
}
#if DEBUG
this.marker.AsyncResult = null;
this.marker = null;
if (!Fx.FastDebug && completeStack == null)
{
this.completeStack = new StackTrace();
}
#endif
this.completedSynchronously = didCompleteSynchronously;
if (this.OnCompleting != null)
{
// Allow exception replacement, like a catch/throw pattern.
try
{
this.OnCompleting(this, this.exception);
}
catch (Exception e)
{
if (Fx.IsFatal(e))
{
throw;
}
this.exception = e;
}
}
if (didCompleteSynchronously)
{
// If we completedSynchronously, then there's no chance that the manualResetEvent was created so
// we don't need to worry about a race
Fx.Assert(this.manualResetEvent == null, "No ManualResetEvent should be created for a synchronous AsyncResult.");
this.isCompleted = true;
}
else
{
lock (this.ThisLock)
{
this.isCompleted = true;
if (this.manualResetEvent != null)
{
this.manualResetEvent.Set();
}
}
}
if (this.Callback != null)
{
try
{
if (this.VirtualCallback != null)
{
this.VirtualCallback(this.Callback, this);
}
else
{
this.Callback(this);
}
}
#pragma warning disable 1634
#pragma warning suppress 56500 // transferring exception to another thread
catch (Exception e)
{
if (Fx.IsFatal(e))
{
throw;
}
throw Fx.Exception.AsError(new CallbackException(SRCore.AsyncCallbackThrewException, e));
}
#pragma warning restore 1634
}
}