public override IAsyncResult BeginWrite(
byte[] array,
int offset,
int count,
AsyncCallback asyncCallback,
object asyncState)
{
this.EnsureCompressionMode();
if ((uint)this.asyncOperations > 0U)
{
throw new InvalidOperationException(SR.GetString("Invalid begin call"));
}
this.ValidateParameters(array, offset, count);
this.EnsureNotDisposed();
Interlocked.Increment(ref this.asyncOperations);
try
{
DeflateStreamAsyncResult streamAsyncResult = new DeflateStreamAsyncResult((object)this, asyncState, asyncCallback, array, offset, count);
streamAsyncResult.isWrite = true;
this.m_AsyncWriterDelegate.BeginInvoke(array, offset, count, true, this.m_CallBack, (object)streamAsyncResult);
streamAsyncResult.m_CompletedSynchronously &= streamAsyncResult.IsCompleted;
return((IAsyncResult)streamAsyncResult);
}
catch
{
Interlocked.Decrement(ref this.asyncOperations);
throw;
}
}
private void ReadCallback(IAsyncResult baseStreamResult)
{
DeflateStreamAsyncResult asyncState = (DeflateStreamAsyncResult)baseStreamResult.AsyncState;
asyncState.m_CompletedSynchronously &= baseStreamResult.CompletedSynchronously;
try
{
this.EnsureNotDisposed();
int length = this._stream.EndRead(baseStreamResult);
if (length <= 0)
{
asyncState.InvokeCallback((object)0);
}
else
{
this.inflater.SetInput(this.buffer, 0, length);
int num = this.inflater.Inflate(asyncState.buffer, asyncState.offset, asyncState.count);
if (num == 0 && !this.inflater.Finished())
{
this._stream.BeginRead(this.buffer, 0, this.buffer.Length, this.m_CallBack, (object)asyncState);
}
else
{
asyncState.InvokeCallback((object)num);
}
}
}
catch (Exception ex)
{
asyncState.InvokeCallback((object)ex);
}
}
public override void EndWrite(IAsyncResult asyncResult)
{
this.EnsureCompressionMode();
this.CheckEndXxxxLegalStateAndParams(asyncResult);
DeflateStreamAsyncResult asyncResult1 = (DeflateStreamAsyncResult)asyncResult;
this.AwaitAsyncResultCompletion(asyncResult1);
Exception result = asyncResult1.Result as Exception;
if (result != null)
{
throw result;
}
}
public override int EndRead(IAsyncResult asyncResult)
{
this.EnsureDecompressionMode();
this.CheckEndXxxxLegalStateAndParams(asyncResult);
DeflateStreamAsyncResult asyncResult1 = (DeflateStreamAsyncResult)asyncResult;
this.AwaitAsyncResultCompletion(asyncResult1);
Exception result = asyncResult1.Result as Exception;
if (result != null)
{
throw result;
}
return((int)asyncResult1.Result);
}
private void AwaitAsyncResultCompletion(DeflateStreamAsyncResult asyncResult)
{
try
{
if (asyncResult.IsCompleted)
{
return;
}
asyncResult.AsyncWaitHandle.WaitOne();
}
finally
{
Interlocked.Decrement(ref this.asyncOperations);
asyncResult.Close();
}
}
private void WriteCallback(IAsyncResult asyncResult)
{
DeflateStreamAsyncResult asyncState = (DeflateStreamAsyncResult)asyncResult.AsyncState;
asyncState.m_CompletedSynchronously &= asyncResult.CompletedSynchronously;
try
{
this.m_AsyncWriterDelegate.EndInvoke(asyncResult);
}
catch (Exception ex)
{
asyncState.InvokeCallback((object)ex);
return;
}
asyncState.InvokeCallback((object)null);
}
public override IAsyncResult BeginRead(
byte[] array,
int offset,
int count,
AsyncCallback asyncCallback,
object asyncState)
{
this.EnsureDecompressionMode();
if ((uint)this.asyncOperations > 0U)
{
throw new InvalidOperationException(SR.GetString("Invalid begin call"));
}
this.ValidateParameters(array, offset, count);
this.EnsureNotDisposed();
Interlocked.Increment(ref this.asyncOperations);
try
{
DeflateStreamAsyncResult streamAsyncResult = new DeflateStreamAsyncResult((object)this, asyncState, asyncCallback, array, offset, count);
streamAsyncResult.isWrite = false;
int num = this.inflater.Inflate(array, offset, count);
if ((uint)num > 0U)
{
streamAsyncResult.InvokeCallback(true, (object)num);
return((IAsyncResult)streamAsyncResult);
}
if (this.inflater.Finished())
{
streamAsyncResult.InvokeCallback(true, (object)0);
return((IAsyncResult)streamAsyncResult);
}
this._stream.BeginRead(this.buffer, 0, this.buffer.Length, this.m_CallBack, (object)streamAsyncResult);
streamAsyncResult.m_CompletedSynchronously &= streamAsyncResult.IsCompleted;
return((IAsyncResult)streamAsyncResult);
}
catch
{
Interlocked.Decrement(ref this.asyncOperations);
throw;
}
}
