[#BIO_new_bio_pair]
= BIO_new_bio_pair
:mrdocs:

Create two connected memory BIOs that form a reliable in‐memory byte pipe.

== Synopsis

Declared in `<openssl/bio.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
int
BIO_new_bio_pair(
    xref:BIO.adoc[BIO]** bio1,
    size_t writebuf1,
    xref:BIO.adoc[BIO]** bio2,
    size_t writebuf2);
----

== Return Value

1 on success, or 0 on error.

== Parameters

[cols="1,4"]
|===
| Name| Description
| *bio1*
| Receives the first endpoint BIO.
| *writebuf1*
| Write buffer size for `*bio1` (0 for default).
| *bio2*
| Receives the second endpoint BIO.
| *writebuf2*
| Write buffer size for `*bio2` (0 for default).
|===


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