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docs: Revise notes for example std_global_allocator.rs
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Original file line number | Diff line number | Diff line change | ||||
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@@ -1,20 +1,21 @@ | ||||||
use talc::*; | ||||||
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// note: miri thinks this violates stacked borrows upon program termination. | ||||||
// This only occurs if #[global_allocator] is used. | ||||||
// Use the allocator API if you can't have that. Perhaps checck out `std_allocator_api.rs`? | ||||||
// note: | ||||||
// - Miri thinks this violates stacked borrows upon program termination. | ||||||
// - This only occurs with `#[global_allocator]`. | ||||||
// - Use the allocator API if you can't have that. Perhaps check out `examples/stable_allocator_api.rs`? | ||||||
// - `spin::Mutex<()>` | ||||||
// The `spin` crate provides a mutex that is a sensible choice to use. | ||||||
// - `ClaimOnOom` | ||||||
// An OOM handler with support for claiming memory on-demand is required, as allocations may | ||||||
// occur prior to the execution of `main()`. | ||||||
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static mut START_ARENA: [u8; 10000] = [0; 10000]; | ||||||
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// The mutex provided by the `spin` crate is used here as it's a sensible choice | ||||||
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// Allocations may occur prior to the execution of `main()`, thus support for | ||||||
// claiming memory on-demand is required, such as the ClaimOnOom OOM handler. | ||||||
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#[global_allocator] | ||||||
static ALLOCATOR: Talck<spin::Mutex<()>, ClaimOnOom> = Talc::new(unsafe { | ||||||
ClaimOnOom::new(Span::from_const_array(std::ptr::addr_of!(START_ARENA))) | ||||||
}).lock(); | ||||||
ClaimOnOom::new(Span::from_const_array(std::ptr::addr_of!(START_ARENA))) | ||||||
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}).lock(); | ||||||
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fn main() { | ||||||
let mut vec = Vec::with_capacity(100); | ||||||
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Alternative, although it'd be good to know what "if you can't have that" is referring to.