32 lines
1.2 KiB
Rust
32 lines
1.2 KiB
Rust
//! Helper macros to use with the QADAPT allocator system
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//!
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//! This crate is unusable on its own, but because `proc_macro` crates
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//! can't export non-proc-macro symbols, we have to go through an extra step
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//! to move these up.
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//!
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//! Ultimately, this does actually work because we don't need to actually use
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//! references to the underlying functionality here, we just need to know
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//! where they will ultimately end up at.
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// TODO: This causes issues, but I can't track down why
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// #![deny(missing_docs)]
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extern crate proc_macro;
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use proc_macro::TokenTree;
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use proc_macro::TokenStream;
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/// Set up the QADAPT allocator to trigger a panic if any allocations happen during
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/// this function. Race conditions between threads are not checked, this macro will
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/// only work as intended in a single-threaded or otherwise synchronized environment.
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#[proc_macro_attribute]
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pub fn allocate_panic(_attr: TokenStream, item: TokenStream) -> TokenStream {
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let ret = item.clone();
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let mut token_iter = item.into_iter();
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match token_iter.next() {
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Some(TokenTree::Ident(ref i)) if i.to_string() == "fn" => (),
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_ => panic!("#[allocate_panic] macro can only be applied to functions")
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}
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ret
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}
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