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use std::num::NonZeroU32;
use std::sync::atomic::{AtomicU32, Ordering};
use crate::context::ModuleId;
#[derive(Debug, PartialEq, Eq, Clone, Copy, Hash, PartialOrd, Ord)]
pub struct LocalId(NonZeroU32);
#[derive(Debug, PartialEq, Eq, Clone, Copy, Hash, PartialOrd, Ord)]
pub struct ExportId(ModuleId, LocalId);
impl ExportId {
pub fn new(module_id: ModuleId, local_id: LocalId) -> Self {
Self(module_id, local_id)
}
pub fn module_id(self) -> ModuleId {
self.0
}
pub fn local_id(self) -> LocalId {
self.1
}
}
pub struct LocalIdAlloc {
local_id_counter: AtomicU32,
}
impl LocalIdAlloc {
pub fn new() -> Self {
Self {
local_id_counter: AtomicU32::new(1),
}
}
pub fn alloc(&self) -> LocalId {
LocalId(NonZeroU32::new(self.local_id_counter.fetch_add(1, Ordering::Relaxed)).unwrap())
}
pub fn alloc_mut(&mut self) -> LocalId {
let local_id_counter = self.local_id_counter.get_mut();
let raw_id = *local_id_counter;
*local_id_counter += 1;
LocalId(NonZeroU32::new(raw_id).unwrap())
}
}