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use proc_macro2::{Span, TokenStream as TokenStream2};
use quote::quote;
use rtic_syntax::ast::App;
use syn::Index;
use crate::{analyze::Analysis, codegen::util};
/// Generates code that runs after `#[init]` returns
pub fn codegen(app: &App, analysis: &Analysis) -> Vec<TokenStream2> {
let mut stmts = vec![];
// Initialize shared resources
for (name, res) in &app.shared_resources {
let mangled_name = util::static_shared_resource_ident(name);
// If it's live
let cfgs = res.cfgs.clone();
if analysis.shared_resources.get(name).is_some() {
stmts.push(quote!(
// We include the cfgs
#(#cfgs)*
// Resource is a RacyCell<MaybeUninit<T>>
// - `get_mut` to obtain a raw pointer to `MaybeUninit<T>`
// - `write` the defined value for the late resource T
#mangled_name.get_mut().write(core::mem::MaybeUninit::new(shared_resources.#name));
));
}
}
// Initialize local resources
for (name, res) in &app.local_resources {
let mangled_name = util::static_local_resource_ident(name);
// If it's live
let cfgs = res.cfgs.clone();
if analysis.local_resources.get(name).is_some() {
stmts.push(quote!(
// We include the cfgs
#(#cfgs)*
// Resource is a RacyCell<MaybeUninit<T>>
// - `get_mut` to obtain a raw pointer to `MaybeUninit<T>`
// - `write` the defined value for the late resource T
#mangled_name.get_mut().write(core::mem::MaybeUninit::new(local_resources.#name));
));
}
}
for (i, (monotonic, _)) in app.monotonics.iter().enumerate() {
// For future use
// let doc = format!(" RTIC internal: {}:{}", file!(), line!());
// stmts.push(quote!(#[doc = #doc]));
#[allow(clippy::cast_possible_truncation)]
let idx = Index {
index: i as u32,
span: Span::call_site(),
};
stmts.push(quote!(monotonics.#idx.reset();));
// Store the monotonic
let name = util::monotonic_ident(&monotonic.to_string());
stmts.push(quote!(#name.get_mut().write(Some(monotonics.#idx));));
}
// Enable the interrupts -- this completes the `init`-ialization phase
stmts.push(quote!(rtic::export::interrupt::enable();));
stmts
}