int mongoc_stream_flush (mongoc_stream_t *stream);
- stream: A mongoc_stream_t.
This function shall flush any buffered bytes in the underlying stream to the physical transport. It mimics the API and semantics of fflush(), forcing a write of user space buffered data.
Not all stream implementations may implement this feature.
0 is returned on success, otherwise -1 and errno is set.
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