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use proc_macro2::TokenStream as TokenStream2;
use quote::quote;
use rtic_syntax::{ast::App, Context};
use crate::{
analyze::Analysis,
check::Extra,
codegen::{locals, module, resources_struct},
};
/// Generate support code for hardware tasks (`#[exception]`s and `#[interrupt]`s)
pub fn codegen(
app: &App,
analysis: &Analysis,
extra: &Extra,
) -> (
// mod_app_hardware_tasks -- interrupt handlers and `${task}Resources` constructors
Vec<TokenStream2>,
// root_hardware_tasks -- items that must be placed in the root of the crate:
// - `${task}Locals` structs
// - `${task}Resources` structs
// - `${task}` modules
Vec<TokenStream2>,
// user_hardware_tasks -- the `#[task]` functions written by the user
Vec<TokenStream2>,
) {
let mut mod_app = vec![];
let mut root = vec![];
let mut user_tasks = vec![];
for (name, task) in &app.hardware_tasks {
let locals_new = if task.locals.is_empty() {
quote!()
} else {
quote!(#name::Locals::new(),)
};
let symbol = task.args.binds.clone();
let priority = task.args.priority;
let app_name = &app.name;
let app_path = quote! {crate::#app_name};
mod_app.push(quote!(
#[allow(non_snake_case)]
#[no_mangle]
unsafe fn #symbol() {
const PRIORITY: u8 = #priority;
rtic::export::run(PRIORITY, || {
#app_path::#name(
#locals_new
#name::Context::new(&rtic::export::Priority::new(PRIORITY))
)
});
}
));
let mut needs_lt = false;
// `${task}Resources`
if !task.args.resources.is_empty() {
let (item, constructor) =
resources_struct::codegen(Context::HardwareTask(name), &mut needs_lt, app);
root.push(item);
mod_app.push(constructor);
}
root.push(module::codegen(
Context::HardwareTask(name),
needs_lt,
app,
analysis,
extra,
));
// `${task}Locals`
let mut locals_pat = None;
if !task.locals.is_empty() {
let (struct_, pat) = locals::codegen(Context::HardwareTask(name), &task.locals, app);
root.push(struct_);
locals_pat = Some(pat);
}
if !&task.is_extern {
let attrs = &task.attrs;
let context = &task.context;
let stmts = &task.stmts;
let locals_pat = locals_pat.iter();
user_tasks.push(quote!(
#(#attrs)*
#[allow(non_snake_case)]
fn #name(#(#locals_pat,)* #context: #name::Context) {
use rtic::Mutex as _;
use rtic::mutex_prelude::*;
#(#stmts)*
}
));
}
}
(mod_app, root, user_tasks)
}
|
