[#CRYPTO_EX_free]
= CRYPTO_EX_free
:mrdocs:

Callback invoked when an ex_data slot is freed or the owning object is destroyed.

== Synopsis

Declared in `<openssl/crypto.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
typedef void CRYPTO_EX_free(void*, void*, xref:CRYPTO_EX_DATA.adoc[CRYPTO_EX_DATA]*, int, long, void*);
----

== Parameters

[cols="1,4"]
|===
| Name| Description
| *parent*
| Object that owns the CRYPTO_EX_DATA.
| *ptr*
| Pointer value previously stored in the slot.
| *ad*
| Ex‐data bag for `parent.`
| *idx*
| Ex‐data index being cleared.
| *argl*
| Long argument registered with CRYPTO_get_ex_new_index().
| *argp*
| Pointer argument registered with CRYPTO_get_ex_new_index().
|===


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