[#CRYPTO_THREAD_set_local]
= CRYPTO_THREAD_set_local
:mrdocs:

Store `val` in the thread‐local slot identified by `key.`

== Synopsis

Declared in `<openssl/crypto.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
int
CRYPTO_THREAD_set_local(
    xref:CRYPTO_THREAD_LOCAL.adoc[CRYPTO_THREAD_LOCAL]* key,
    void* val);
----

== Return Value

1 on success, or 0 on failure.

== Parameters

[cols="1,4"]
|===
| Name| Description
| *key*
| Thread‐local key previously created with CRYPTO_THREAD_init_local().
| *val*
| Pointer to store for the calling thread.
|===


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