[#CRYPTO_THREAD_write_lock]
= CRYPTO_THREAD_write_lock
:mrdocs:

Acquire a CRYPTO_RWLOCK for exclusive (write) access.

== Synopsis

Declared in `<openssl/crypto.h>`

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

== Return Value

1 on success, or 0 on error.

== Parameters

[cols="1,4"]
|===
| Name| Description
| *lock*
| Lock to acquire.
|===


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