What about to add the connection pool in the c driver?

Sample codes:

mongo_conn_pool *pool = mongo_conn_pool_alloc();
mongo_conn_pool_init(pool, options);
mongo *conn = mongo_conn_pool_acquire(pool);
/* ..... */
mongo_conn_pool_release(pool);
mongo_conn_pool_destroy(pool);
mongo_conn_pool_dealloc(pool);

Does anyone think this make sense?