void CRYPTO_set_id_callback(unsigned long (*id_function)(void));
+ int CRYPTO_num_locks(void);
+
=head1 DESCRIPTION
OpenSSL can safely be used in multi-threaded applications provided
needed to perform locking on shared data stuctures. Multi-threaded
applications will crash at random if it is not set.
-locking_function() must be able to handle up to B<CRYPTO_NUM_LOCKS>
+locking_function() must be able to handle up to CRYPTO_num_locks()
different mutex locks. It sets the B<n>th lock if B<mode> &
B<CRYPTO_LOCK>, and releases it otherwise.
needed on Windows nor on platforms where getpid() returns a different
ID for each thread.
+=RETURN VALUES
+
+CRYPTO_num_locks() returns the required number of locks.
+The other functions return no values.
+
=NOTE
You can find out if OpenSSL was configured with thread support:
CRYPTO_set_locking_callback() and CRYPTO_set_id_callback() are
available in all versions of SSLeay and OpenSSL.
+CRYPTO_num_locks() was added in OpenSSL 0.9.4.
=head1 SEE ALSO