[#CRYPTO_THREAD_read_lock]
= CRYPTO_THREAD_read_lock
:mrdocs:

Acquire a shared (read) lock on a CRYPTO_RWLOCK.

== Synopsis

Declared in `<openssl/crypto.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
int
CRYPTO_THREAD_read_lock(xref:CRYPTO_RWLOCK.adoc[CRYPTO_RWLOCK]* lock);
----

== Return Value

1 on success, or 0 on failure.

== Parameters

[cols="1,4"]
|===
| Name| Description
| *lock*
| Lock allocated by CRYPTO_THREAD_lock_new().
|===


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