ossl_drbg_enable_locking
if (!ossl_drbg_enable_locking(drbg))
{ OSSL_FUNC_RAND_ENABLE_LOCKING, (void (*)(void))ossl_drbg_enable_locking },
{ OSSL_FUNC_RAND_ENABLE_LOCKING, (void (*)(void))ossl_drbg_enable_locking },
{ OSSL_FUNC_RAND_ENABLE_LOCKING, (void (*)(void))ossl_drbg_enable_locking },
OSSL_FUNC_rand_enable_locking_fn ossl_drbg_enable_locking;