public AsyncRequestStateFileCopy(AsyncFileCopyBean bean)
{ // constructor
int i = bean.ThreadId;
BUFFER_SIZE = bean.BUFFER_SIZE;
BUFFERS = bean.BUFFERS;
bufferOffset = i * BUFFER_SIZE; // offset in file where buffer reads/writes
ReadLaunched = new AutoResetEvent(false); // semaphore says reading (not writing)
Buffer = new byte[BUFFER_SIZE]; // allocates the buffer
}
public void WriteCompleteCallback(IAsyncResult ar)
{
lock (WriteCountMutex)
{ // protect the shared variables
AsyncFileCopyBean bean = ar.AsyncState as AsyncFileCopyBean; // get request index
int i = bean.ThreadId;
bean.Target.EndWrite(ar); // mark the write complete
bean.BytesWritten += BUFFER_SIZE; // advance bytes written
this.bufferOffset += BUFFERS * BUFFER_SIZE; // stride to next slot
if (this.bufferOffset < bean.TotalBytes)
{ // if not all read, issue next read
bean.Source.Position = this.bufferOffset; // issue read at that offset
this.ReadAsyncResult = bean.Source.BeginRead(this.Buffer, 0, BUFFER_SIZE, null, i);
this.ReadLaunched.Set();
}
}
}
