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fix debug scopes

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This commit is contained in:
Aleksey Kladov 2019-06-04 14:46:22 +03:00
parent fcf30d8fa5
commit d2b23599b6
1 changed files with 4 additions and 4 deletions
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8
crates/ra_prof/src/lib.rs
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@ -236,13 +236,13 @@ thread_local!(static IN_SCOPE: RefCell<bool> = RefCell::new(false));
/// Allows to check if the current code is withing some dynamic scope, can be
/// useful during debugging to figure out why a function is called.
pub struct Scope {
_hidden: (),
prev: bool,
}
impl Scope {
pub fn enter() -> Scope {
IN_SCOPE.with(|slot| *slot.borrow_mut() = true);
Scope { _hidden: () }
let prev = IN_SCOPE.with(|slot| std::mem::replace(&mut *slot.borrow_mut(), true));
Scope { prev }
}
pub fn is_active() -> bool {
IN_SCOPE.with(|slot| *slot.borrow())
@ -251,7 +251,7 @@ impl Scope {
impl Drop for Scope {
fn drop(&mut self) {
IN_SCOPE.with(|slot| *slot.borrow_mut() = false);
IN_SCOPE.with(|slot| *slot.borrow_mut() = self.prev);
}
}