// The requirements are:
// * We must read at least one byte from the stream every time
// we get a HasBytesAvailable event.
// * SerializeToStreamAsync is executed on a separate thread,
// so reads must somehow be synchronized with that thread.
//
// Current implementation:
// * We read data in ReadStreamData (on the same thread
// we got the HasBytesAvailable event, i.e. inside the
// HasBytesAvailable event handler).
// * Data is stored in a class-level buffer.
// * SerializeToStreamAsync blocks while waiting for
// data from ReadStreamData.
// * ReadStreamData will only read more data once SerializeToStreamAsync
// has consumed any existing data. This means we'll be
// blocking in the HasBytesAvailable event handler until
// any previously read data has been processed (this prevents
// any unbound memory growth).
public CFContentStream (CFHTTPStream stream)
{
this.http_stream = stream;
data = new BufferData () {
Buffer = new byte [4096],
};
data_event = new AutoResetEvent (false);
data_read_event = new AutoResetEvent (true);
data_mutex = new Mutex ();
}
public void Close ()
{
data_read_event.WaitOne (); // make sure there's no pending data
data_mutex.WaitOne ();
data = null;
data_mutex.ReleaseMutex ();
data_event.Set ();
}