[#CRYPTO_ONCE]
= CRYPTO&lowbar;ONCE
:mrdocs:

Once&hyphen;control type used with CRYPTO&lowbar;THREAD&lowbar;run&lowbar;once() on POSIX builds&period;

== Synopsis

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

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
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typedef pthread&lowbar;once&lowbar;t CRYPTO&lowbar;ONCE;
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