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use proc_macro2::TokenStream as TokenStream2;
use quote::quote;
use rtic_syntax::{analyze::Ownership, ast::App};
use crate::{analyze::Analysis, check::Extra, codegen::util};
/// Generates `static` variables and shared resource proxies
pub fn codegen(
app: &App,
analysis: &Analysis,
extra: &Extra,
) -> (
// mod_app -- the `static` variables behind the proxies
Vec<TokenStream2>,
// mod_resources -- the `resources` module
TokenStream2,
) {
let mut mod_app = vec![];
let mut mod_resources = vec![];
for (name, res) in &app.shared_resources {
let cfgs = &res.cfgs;
let ty = &res.ty;
let mangled_name = &util::static_shared_resource_ident(&name);
// late resources in `util::link_section_uninit`
let section = util::link_section_uninit();
let attrs = &res.attrs;
// For future use
// let doc = format!(" RTIC internal: {}:{}", file!(), line!());
mod_app.push(quote!(
#[allow(non_camel_case_types)]
#[allow(non_upper_case_globals)]
// #[doc = #doc]
#[doc(hidden)]
#(#attrs)*
#(#cfgs)*
#section
static #mangled_name: rtic::RacyCell<core::mem::MaybeUninit<#ty>> = rtic::RacyCell::new(core::mem::MaybeUninit::uninit());
));
// For future use
// let doc = format!(" RTIC internal: {}:{}", file!(), line!());
if !res.properties.lock_free {
mod_resources.push(quote!(
// #[doc = #doc]
#[doc(hidden)]
#[allow(non_camel_case_types)]
#(#cfgs)*
pub struct #name<'a> {
priority: &'a Priority,
}
#(#cfgs)*
impl<'a> #name<'a> {
#[inline(always)]
pub unsafe fn new(priority: &'a Priority) -> Self {
#name { priority }
}
#[inline(always)]
pub unsafe fn priority(&self) -> &Priority {
self.priority
}
}
));
let ptr = quote!(
#(#cfgs)*
#mangled_name.get_mut_unchecked().as_mut_ptr()
);
let ceiling = match analysis.ownerships.get(name) {
Some(Ownership::Owned { priority }) => *priority,
Some(Ownership::CoOwned { priority }) => *priority,
Some(Ownership::Contended { ceiling }) => *ceiling,
None => 0,
};
// For future use
// let doc = format!(" RTIC internal ({} resource): {}:{}", doc, file!(), line!());
mod_app.push(util::impl_mutex(
extra,
cfgs,
true,
&name,
quote!(#ty),
ceiling,
ptr,
));
}
}
let mod_resources = if mod_resources.is_empty() {
quote!()
} else {
quote!(mod shared_resources {
use rtic::export::Priority;
#(#mod_resources)*
})
};
(mod_app, mod_resources)
}
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