[#CRYPTO_secure_actual_size]
= CRYPTO_secure_actual_size
:mrdocs:

Return the actual secure‐heap block size reserved for `ptr.`

== Synopsis

Declared in `<openssl/crypto.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
size_t
CRYPTO_secure_actual_size(void* ptr);
----

== Return Value

Usable size of the secure block, or 0 if `ptr` is not secure‐allocated.

== Parameters

[cols="1,4"]
|===
| Name| Description
| *ptr*
| Secure allocation from CRYPTO_secure_malloc().
|===


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