[#BloombergLP-bdlsb-OverflowMemOutStreamBuf-sync]
= xref:BloombergLP.adoc[BloombergLP]::xref:BloombergLP/bdlsb.adoc[bdlsb]::xref:BloombergLP/bdlsb/OverflowMemOutStreamBuf.adoc[OverflowMemOutStreamBuf]::sync
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Set `d_dataLength` to the amount of data that has been written to this stream buffer, from the beginning of the stream to the current `pptr()` position and return 0. Note that if `pptr()` points into the overflow buffer, this size the initial buffer, plus the portion of the overflow buffer that has been written to.

== Synopsis

Declared in `<bdlsb_overflowmemoutstreambuf.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
virtual
int
sync() override;
----


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