public Int32 EndRead(IAsyncResult asyncResult)
#endif
{
if (asyncResult == null)
{
throw new ArgumentNullException(nameof(asyncResult));
}
Contract.EndContractBlock();
EnsureNotDisposed();
EnsureCanRead();
StreamOperationAsyncResult streamAsyncResult = asyncResult as StreamOperationAsyncResult;
if (streamAsyncResult == null)
{
throw new ArgumentException(SR.Argument_UnexpectedAsyncResult, nameof(asyncResult));
}
streamAsyncResult.Wait();
try
{
// If the async result did NOT process the async IO operation in its completion handler (i.e. check for errors,
// cache results etc), then we need to do that processing now. This is to allow blocking-over-async IO operations.
// See the big comment in BeginRead for details.
if (!streamAsyncResult.ProcessCompletedOperationInCallback)
{
streamAsyncResult.ProcessCompletedOperation();
}
// Rethrow errors caught in the completion callback, if any:
if (streamAsyncResult.HasError)
{
streamAsyncResult.CloseStreamOperation();
streamAsyncResult.ThrowCachedError();
}
// Done:
Int64 bytesCompleted = streamAsyncResult.BytesCompleted;
Debug.Assert(bytesCompleted <= unchecked ((Int64)Int32.MaxValue));
return((Int32)bytesCompleted);
}
finally
{
// Closing multiple times is Ok.
streamAsyncResult.CloseStreamOperation();
}
}
public void EndWrite(IAsyncResult asyncResult)
#endif
{
if (asyncResult == null)
{
throw new ArgumentNullException("asyncResult");
}
Contract.EndContractBlock();
EnsureNotDisposed();
EnsureCanWrite();
StreamOperationAsyncResult streamAsyncResult = asyncResult as StreamOperationAsyncResult;
if (streamAsyncResult == null)
{
throw new ArgumentException(SR.Argument_UnexpectedAsyncResult, "asyncResult");
}
streamAsyncResult.Wait();
try
{
// If the async result did NOT process the async IO operation in its completion handler (i.e. check for errors,
// cache results etc), then we need to do that processing now. This is to allow blocking-over-async IO operations.
// See the big comment in BeginWrite for details.
if (!streamAsyncResult.ProcessCompletedOperationInCallback)
{
streamAsyncResult.ProcessCompletedOperation();
}
// Rethrow errors caught in the completion callback, if any:
if (streamAsyncResult.HasError)
{
streamAsyncResult.CloseStreamOperation();
streamAsyncResult.ThrowCachedError();
}
}
finally
{
// Closing multiple times is Ok.
streamAsyncResult.CloseStreamOperation();
}
}