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Remove unsafe and Rc

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This commit is contained in:
Celina G. Val 2023-10-23 14:21:24 -07:00
parent f613b26cfb
commit 421631a3a1
3 changed files with 15 additions and 22 deletions
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22
compiler/rustc_smir/src/rustc_internal/mod.rs
View File

@ -18,15 +18,14 @@ use std::cell::RefCell;
use std::fmt::Debug;
use std::hash::Hash;
use std::ops::Index;
use std::rc::Rc;
mod internal;
pub unsafe fn stable<'tcx, S: Stable<'tcx>>(item: &S) -> S::T {
pub fn stable<'tcx, S: Stable<'tcx>>(item: &S) -> S::T {
with_tables(|tables| item.stable(tables))
}
pub unsafe fn internal<'tcx, S: RustcInternal<'tcx>>(item: &S) -> S::T {
pub fn internal<'tcx, S: RustcInternal<'tcx>>(item: &S) -> S::T {
with_tables(|tables| item.internal(tables))
}
@ -141,15 +140,12 @@ pub fn crate_num(item: &stable_mir::Crate) -> CrateNum {
// datastructures and stable MIR datastructures
scoped_thread_local! (static TLV: Cell<*const ()>);
pub(crate) fn init<'tcx>(tables: TablesWrapper<'tcx>, f: impl FnOnce()) {
pub(crate) fn init<'tcx>(tables: &TablesWrapper<'tcx>, f: impl FnOnce()) {
assert!(!TLV.is_set());
fn g<'a, 'tcx>(context: &'a TablesWrapper<'tcx>, f: impl FnOnce()) {
let ptr: *const () = &context as *const &_ as _;
TLV.set(&Cell::new(ptr), || {
f();
});
}
g(&tables, f);
let ptr: *const () = &tables as *const &_ as _;
TLV.set(&Cell::new(ptr), || {
f();
});
}
/// Loads the current context and calls a function with it.
@ -166,7 +162,7 @@ pub(crate) fn with_tables<'tcx, R>(f: impl FnOnce(&mut Tables<'tcx>) -> R) -> R
}
pub fn run(tcx: TyCtxt<'_>, f: impl FnOnce()) {
let tables = Rc::new(RefCell::new(Tables {
let tables = TablesWrapper(RefCell::new(Tables {
tcx,
def_ids: IndexMap::default(),
alloc_ids: IndexMap::default(),
@ -174,7 +170,7 @@ pub fn run(tcx: TyCtxt<'_>, f: impl FnOnce()) {
types: vec![],
instances: IndexMap::default(),
}));
stable_mir::run(TablesWrapper(Rc::clone(&tables)), || init(TablesWrapper(tables), f));
stable_mir::run(&tables, || init(&tables, f));
}
#[macro_export]

2
compiler/rustc_smir/src/rustc_smir/mod.rs
View File

@ -279,7 +279,7 @@ impl<S, R: PartialEq> PartialEq<R> for MaybeStable<S, R> {
}
}
pub(crate) struct TablesWrapper<'tcx>(pub(crate) std::rc::Rc<RefCell<Tables<'tcx>>>);
pub(crate) struct TablesWrapper<'tcx>(pub(crate) RefCell<Tables<'tcx>>);
pub struct Tables<'tcx> {
pub(crate) tcx: TyCtxt<'tcx>,

13
compiler/stable_mir/src/lib.rs
View File

@ -243,15 +243,12 @@ pub trait Context {
// datastructures and stable MIR datastructures
scoped_thread_local! (static TLV: Cell<*const ()>);
pub fn run(context: impl Context, f: impl FnOnce()) {
pub fn run(context: &dyn Context, f: impl FnOnce()) {
assert!(!TLV.is_set());
fn g<'a>(context: &(dyn Context + 'a), f: impl FnOnce()) {
let ptr: *const () = &context as *const &_ as _;
TLV.set(&Cell::new(ptr), || {
f();
});
}
g(&context, f);
let ptr: *const () = &context as *const &_ as _;
TLV.set(&Cell::new(ptr), || {
f();
});
}
/// Loads the current context and calls a function with it.