| public BeginRead ( byte buffer, int offset, int count, AsyncCallback callback, object state ) : IAsyncResult | ||
| buffer | byte | |
| offset | int | |
| count | int | |
| callback | AsyncCallback | |
| state | object | |
| Résultat | IAsyncResult | |
public override IAsyncResult BeginRead(byte[] buffer, int offset, int count, AsyncCallback callback, object state)
{
if (_isAsync)
return TaskToApm.Begin(ReadAsync(buffer, offset, count, CancellationToken.None), callback, state);
else
return base.BeginRead(buffer, offset, count, callback, state);
}
| PipeStream::BeginRead ( byte buffer, int offset, int count, System callback, object state ) : System.IAsyncResult |
public static int Read(PipeStream stream, byte[] buffer, int offset, int count, bool isAsync, TimeoutHelper timeoutHelper)
{
// 异步时，使用异步方式读取数据
if (isAsync)
{
IAsyncResult asyncResult = stream.BeginRead(buffer, offset, count, null, null);
// 等待 timeoutHelper 计算后的剩余时间，如果在这段时间内没有读到数据，那么将直接返回，这时，由于没有读到数据，返回的数据长度为 0
asyncResult.AsyncWaitHandle.WaitOne(timeoutHelper == null ? 60000 : (int)timeoutHelper.RemainingTime().TotalMilliseconds);
if (asyncResult.GetType() == pipeStreamAsyncResultType)
{
pipeStreamAsyncResult_waitHandle.SetValue(asyncResult, null);
}
return stream.EndRead(asyncResult);
}
// 使用系统内置的方式进行同步阻塞式读取，该方法直到读取到数据才返回
return stream.Read(buffer, offset, count);
}
