} // Dispose
#if !NETFX_CORE
public override IAsyncResult BeginWrite(byte[] array, int offset, int count, AsyncCallback asyncCallback, object asyncState) {
EnsureCompressionMode();
// We use this checking order for compat to earlier versions:
if (asyncOperations != 0 )
throw new InvalidOperationException(SR.GetString(SR.InvalidBeginCall));
ValidateParameters(array, offset, count);
EnsureNotDisposed();
Interlocked.Increment(ref asyncOperations);
try {
DeflateStreamAsyncResult userResult = new DeflateStreamAsyncResult(
this, asyncState, asyncCallback, array, offset, count);
userResult.isWrite = true;
m_AsyncWriterDelegate.BeginInvoke(array, offset, count, true, m_CallBack, userResult);
userResult.m_CompletedSynchronously &= userResult.IsCompleted;
return userResult;
} catch {
Interlocked.Decrement(ref asyncOperations);
throw;
}
}
private void AwaitAsyncResultCompletion(DeflateStreamAsyncResult asyncResult) {
try {
if (!asyncResult.IsCompleted)
asyncResult.AsyncWaitHandle.WaitOne();
} finally {
Interlocked.Decrement(ref asyncOperations);
asyncResult.Close(); // this will just close the wait handle
}
}
public override IAsyncResult BeginRead(byte[] array, int offset, int count, AsyncCallback asyncCallback, object asyncState) {
EnsureDecompressionMode();
// We use this checking order for compat to earlier versions:
if (asyncOperations != 0)
throw new InvalidOperationException(SR.GetString(SR.InvalidBeginCall));
ValidateParameters(array, offset, count);
EnsureNotDisposed();
Interlocked.Increment(ref asyncOperations);
try {
DeflateStreamAsyncResult userResult = new DeflateStreamAsyncResult(
this, asyncState, asyncCallback, array, offset, count);
userResult.isWrite = false;
// Try to read decompressed data in output buffer
int bytesRead = inflater.Inflate(array, offset, count);
if( bytesRead != 0) {
// If decompression output buffer is not empty, return immediately.
// 'true' means we complete synchronously.
userResult.InvokeCallback(true, (object) bytesRead);
return userResult;
}
if (inflater.Finished() ) {
// end of compression stream
userResult.InvokeCallback(true, (object) 0);
return userResult;
}
// If there is no data on the output buffer and we are not at
// the end of the stream, we need to get more data from the base stream
_stream.BeginRead(buffer, 0, buffer.Length, m_CallBack, userResult);
userResult.m_CompletedSynchronously &= userResult.IsCompleted;
return userResult;
} catch {
Interlocked.Decrement( ref asyncOperations);
throw;
}
}
