静态变量

可变静态变量

pub static mut EVENT_COUNTER: u32 = 0;
// 必须在 unsafe 中修改
unsafe {
   EVENT_COUNTER = 2；
}
// 必须在 unsafe 中使用
if unsafe { NET_PACKAGE_EVENT_SWITCH } == 2 {}

不可变静态常量

pub const NET_PACKAGE_EVENT: &'static str = "NET_PACKAGE_EVENT";

lazy_static 依赖

/// global event pool
lazy_static! {
    pub static ref EVENT_POOL: Mutex<HashMap<String, Event>> = {
        let mut map = HashMap::new();
        Mutex::new(map)
    };
}