ossl_rand_pool_detach
*pout = ossl_rand_pool_detach(pool);
*pout = ossl_rand_pool_detach(pool);
unsigned char *ossl_rand_pool_detach(RAND_POOL *pool);
*pout = ossl_rand_pool_detach(pool);
*pout = ossl_rand_pool_detach(pool);