[#CRYPTO_secure_used]
= CRYPTO_secure_used
:mrdocs:

Return how many bytes are currently allocated from the secure heap.

== Synopsis

Declared in `<openssl/crypto.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
size_t
CRYPTO_secure_used();
----

== Return Value

Total secure‐heap bytes in use, or 0 if the secure heap is not initialised.


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