[#OPENSSL_atexit]
= OPENSSL&lowbar;atexit
:mrdocs:

Register a handler to run during OPENSSL&lowbar;cleanup()&period;

== Synopsis

Declared in `&lt;openssl&sol;crypto&period;h&gt;`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
int
OPENSSL&lowbar;atexit(void(* handler)());
----

== Return Value

1 on success, or 0 on failure&period;

== Parameters

[cols="1,4"]
|===
| Name| Description
| *handler*
| Function invoked once when OpenSSL is deinitialized&period;
|===


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