Function Java_sz_1orm_1java_SzOrmPool_poolFree 

#[unsafe(no_mangle)]
pub unsafe extern "system" fn Java_sz_1orm_1java_SzOrmPool_poolFree<'local>(
    unowned_env: EnvUnowned<'local>,
    _class: JClass<'local>,
    handle: jlong,
)

JNI 入口：释放连接池

Safety

SAFETY: handle 必须是 poolNew 返回的有效句柄。