#[macro_export]
macro_rules! LazyStatic {
($t: ty, $b: block) => {{
static mut S: Option<$t> = None;
unsafe {
if S.is_some() {
} else {
S = Some($b);
}
S.as_mut().unwrap_unchecked()
}
}};
($t: ty) => {
LazyStatic!($t, { <$t>::default() })
};
}
#[macro_export]
macro_rules! LocalStatic {
($t: ty, $b: block) => {{
use std::{cell::OnceCell, cell::UnsafeCell, mem::ManuallyDrop};
thread_local!(static S: OnceCell<ManuallyDrop<UnsafeCell<$t>>> = Default::default());
let r = S.with(|f| f.get_or_init(|| ManuallyDrop::new(UnsafeCell::new($b))).get());
unsafe { &mut *r }
}};
($t: ty) => {
LocalStatic!($t, { <$t>::default() })
};
}
#[derive(Debug)]
pub struct TPtr<T: Send + Sync> {
ptr: usize,
t: Dummy<T>,
}
impl<T: Send + Sync> TPtr<T> {
pub unsafe fn new(t: &mut T) -> Self {
let ptr = t as *const T as usize;
Self { ptr, t: Dummy }
}
pub fn get(&self) -> &'static T {
unsafe { &*(self.ptr as *const T) }
}
pub fn get_mut(&mut self) -> &'static mut T {
unsafe { &mut *(self.ptr as *mut T) }
}
}
impl<T: Send + Sync> Copy for TPtr<T> {}
impl<T: Send + Sync> Clone for TPtr<T> {
fn clone(&self) -> Self {
*self
}
}
use std::marker::PhantomData as Dummy;
#[macro_export]
macro_rules! typed_ptr {
($n: expr) => {{
unsafe { TPtr::new($n) }
}};
($($n: expr),+) => {{
unsafe { ($(TPtr::new($n),)+) }
}};
}