DirectFB Reference Manual
IDirectFBDataBuffer   WaitForDataWithTimeout

Wait for data to be available within an amount of time. Thread is idle in the meantime.

WaitForDataWithTimeout (
  IDirectFBDataBuffer *thiz
  unsigned int length
  unsigned int seconds
  unsigned int milli_seconds
);

This method blocks until at least the specified number of bytes is available or the timeout is reached.

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