bjoernager/rust
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Change Backtrace::enabled atomic from SeqCst to Relaxed

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This commit is contained in:
David Tolnay 2021-12-20 12:34:10 -08:00
parent 23f69235ad
commit 984b10da16
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GPG key ID: F9BA143B95FF6D82
1 changed files with 3 additions and 3 deletions
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6
library/std/src/backtrace.rs
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@ -99,7 +99,7 @@ use crate::cell::UnsafeCell;
use crate::env;
use crate::ffi::c_void;
use crate::fmt;
use crate::sync::atomic::{AtomicUsize, Ordering::SeqCst};
use crate::sync::atomic::{AtomicUsize, Ordering::Relaxed};
use crate::sync::Once;
use crate::sys_common::backtrace::{lock, output_filename};
use crate::vec::Vec;
@ -256,7 +256,7 @@ impl Backtrace {
// backtrace captures speedy, because otherwise reading environment
// variables every time can be somewhat slow.
static ENABLED: AtomicUsize = AtomicUsize::new(0);
match ENABLED.load(SeqCst) {
match ENABLED.load(Relaxed) {
0 => {}
1 => return false,
_ => return true,
@ -268,7 +268,7 @@ impl Backtrace {
Err(_) => false,
},
};
ENABLED.store(enabled as usize + 1, SeqCst);
ENABLED.store(enabled as usize + 1, Relaxed);
enabled
}