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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, util},
};
pub fn codegen(
app: &App,
analysis: &Analysis,
extra: &Extra,
) -> (
// const_app_software_tasks -- free queues, buffers and `${task}Resources` constructors
Vec<TokenStream2>,
// root_software_tasks -- items that must be placed in the root of the crate:
// - `${task}Locals` structs
// - `${task}Resources` structs
// - `${task}` modules
Vec<TokenStream2>,
// user_software_tasks -- the `#[task]` functions written by the user
Vec<TokenStream2>,
// user_software_tasks_imports -- the imports for `#[task]` functions written by the user
Vec<TokenStream2>,
) {
let mut const_app = vec![];
let mut root = vec![];
let mut user_tasks = vec![];
let mut software_tasks_imports = vec![];
for (name, task) in &app.software_tasks {
let inputs = &task.inputs;
let (_, _, _, input_ty) = util::regroup_inputs(inputs);
let cap = task.args.capacity;
let cap_lit = util::capacity_literal(cap);
let cap_ty = util::capacity_typenum(cap, true);
// Create free queues and inputs / instants buffers
if let Some(&ceiling) = analysis.free_queues.get(name) {
let fq = util::fq_ident(name);
let (fq_ty, fq_expr, mk_uninit): (_, _, Box<dyn Fn() -> Option<_>>) = {
(
quote!(rtic::export::SCFQ<#cap_ty>),
quote!(rtic::export::Queue(unsafe {
rtic::export::iQueue::u8_sc()
})),
Box::new(|| util::link_section_uninit(true)),
)
};
const_app.push(quote!(
/// Queue version of a free-list that keeps track of empty slots in
/// the following buffers
static mut #fq: #fq_ty = #fq_expr;
));
// Generate a resource proxy if needed
if let Some(ceiling) = ceiling {
const_app.push(quote!(
struct #fq<'a> {
priority: &'a rtic::export::Priority,
}
));
const_app.push(util::impl_mutex(
extra,
&[],
false,
&fq,
fq_ty,
ceiling,
quote!(&mut #fq),
));
}
let ref elems = (0..cap)
.map(|_| quote!(core::mem::MaybeUninit::uninit()))
.collect::<Vec<_>>();
if app.uses_schedule() {
let m = extra.monotonic();
let instants = util::instants_ident(name);
let uninit = mk_uninit();
const_app.push(quote!(
#uninit
/// Buffer that holds the instants associated to the inputs of a task
static mut #instants:
[core::mem::MaybeUninit<<#m as rtic::Monotonic>::Instant>; #cap_lit] =
[#(#elems,)*];
));
}
let uninit = mk_uninit();
let inputs = util::inputs_ident(name);
const_app.push(quote!(
#uninit
/// Buffer that holds the inputs of a task
static mut #inputs: [core::mem::MaybeUninit<#input_ty>; #cap_lit] =
[#(#elems,)*];
));
}
// `${task}Resources`
let mut needs_lt = false;
if !task.args.resources.is_empty() {
let (item, constructor) = resources_struct::codegen(
Context::SoftwareTask(name),
task.args.priority,
&mut needs_lt,
app,
analysis,
);
// Add resources to imports
let name_res = format_ident!("{}Resources", name);
software_tasks_imports.push(quote!(
#[allow(non_snake_case)]
use super::#name_res;
));
root.push(item);
const_app.push(constructor);
}
// `${task}Locals`
let mut locals_pat = None;
if !task.locals.is_empty() {
let (struct_, pat) = locals::codegen(Context::SoftwareTask(name), &task.locals, app);
locals_pat = Some(pat);
root.push(struct_);
}
let context = &task.context;
let attrs = &task.attrs;
let cfgs = &task.cfgs;
let stmts = &task.stmts;
let locals_pat = locals_pat.iter();
user_tasks.push(quote!(
#(#attrs)*
#(#cfgs)*
#[allow(non_snake_case)]
pub fn #name(#(#locals_pat,)* #context: #name::Context #(,#inputs)*) {
use rtic::Mutex as _;
#(#stmts)*
}
));
software_tasks_imports.push(quote!(
#(#cfgs)*
#[allow(non_snake_case)]
use super::#name;
));
root.push(module::codegen(
Context::SoftwareTask(name),
needs_lt,
app,
extra,
));
}
(const_app, root, user_tasks, software_tasks_imports)
}
|
