[#OSSL_DECODER_do_all_provided]
= OSSL_DECODER_do_all_provided
:mrdocs:

Invoke a callback for every decoder provided by activated providers.

== Synopsis

Declared in `<openssl/decoder.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
void
OSSL_DECODER_do_all_provided(
    xref:OSSL_LIB_CTX.adoc[OSSL_LIB_CTX]* libctx,
    void(* fn)(xref:OSSL_DECODER.adoc[OSSL_DECODER]*, void*),
    void* arg);
----

== Parameters

[cols="1,4"]
|===
| Name| Description
| *libctx*
| Library context, or NULL for the default.
| *fn*
| Callback invoked once per decoder.
| *arg*
| Opaque argument passed to `fn.`
|===


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