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Rollup merge of #97830 - LucasDumont:add-example-alloc, r=yaahc

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Add std::alloc::set_alloc_error_hook example
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Michael Goulet 2022-06-08 13:32:19 -07:00 committed by GitHub
commit 888d72c2bf
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1 changed files with 14 additions and 0 deletions
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14
library/std/src/alloc.rs
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@ -296,6 +296,20 @@ static HOOK: AtomicPtr<()> = AtomicPtr::new(ptr::null_mut());
/// about the allocation that failed.
///
/// The allocation error hook is a global resource.
///
/// # Examples
///
/// ```
/// #![feature(alloc_error_hook)]
///
/// use std::alloc::{Layout, set_alloc_error_hook};
///
/// fn custom_alloc_error_hook(layout: Layout) {
/// panic!("memory allocation of {} bytes failed", layout.size());
/// }
///
/// set_alloc_error_hook(custom_alloc_error_hook);
/// ```
#[unstable(feature = "alloc_error_hook", issue = "51245")]
pub fn set_alloc_error_hook(hook: fn(Layout)) {
HOOK.store(hook as *mut (), Ordering::SeqCst);