[#CRYPTO_free_ex_data]
= CRYPTO_free_ex_data
:mrdocs:

Free all ex_data attached to `ad` for the given class, invoking free callbacks.

== Synopsis

Declared in `<openssl/crypto.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
void
CRYPTO_free_ex_data(
    int class_index,
    void* obj,
    xref:CRYPTO_EX_DATA.adoc[CRYPTO_EX_DATA]* ad);
----

== Parameters

[cols="1,4"]
|===
| Name| Description
| *class_index*
| CRYPTO_EX_INDEX_* identifying the object class.
| *obj*
| Object that owns `ad` (passed to free callbacks).
| *ad*
| Ex‐data table to clear.
|===


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