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|
use crate::{analyze::Analysis, check::Extra, codegen::util};
use proc_macro2::TokenStream as TokenStream2;
use quote::quote;
use rtic_syntax::{analyze::Ownership, ast::App};
use std::collections::HashMap;
/// 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);
let attrs = &res.attrs;
// late resources in `util::link_section_uninit`
// unless user specifies custom link section
let section = if attrs.iter().any(|attr| attr.path.is_ident("link_section")) {
None
}
else {
Some(util::link_section_uninit())
};
// 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!());
let shared_name = util::need_to_lock_ident(name);
if !res.properties.lock_free {
mod_resources.push(quote!(
// #[doc = #doc]
#[doc(hidden)]
#[allow(non_camel_case_types)]
#(#cfgs)*
pub struct #shared_name<'a> {
priority: &'a Priority,
}
#(#cfgs)*
impl<'a> #shared_name<'a> {
#[inline(always)]
pub unsafe fn new(priority: &'a Priority) -> Self {
#shared_name { priority }
}
#[inline(always)]
pub unsafe fn priority(&self) -> &Priority {
self.priority
}
}
));
let ptr = quote!(
#(#cfgs)*
#mangled_name.get_mut() as *mut _
);
let ceiling = match analysis.ownerships.get(name) {
Some(Ownership::Owned { priority } | 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,
&shared_name,
"e!(#ty),
ceiling,
&ptr,
));
}
}
let mod_resources = if mod_resources.is_empty() {
quote!()
} else {
quote!(mod shared_resources {
use rtic::export::Priority;
#(#mod_resources)*
})
};
// Computing mapping of used interrupts to masks
let interrupt_ids = analysis.interrupts.iter().map(|(p, (id, _))| (p, id));
let mut prio_to_masks = HashMap::new();
let device = &extra.device;
let mut uses_exceptions_with_resources = false;
for (&priority, name) in interrupt_ids.chain(app.hardware_tasks.values().flat_map(|task| {
if !util::is_exception(&task.args.binds) {
Some((&task.args.priority, &task.args.binds))
} else {
// If any resource to the exception uses non-lock-free or non-local resources this is
// not allwed on thumbv6.
uses_exceptions_with_resources = uses_exceptions_with_resources
|| task
.args
.shared_resources
.iter()
.map(|(ident, access)| {
if access.is_exclusive() {
if let Some(r) = app.shared_resources.get(ident) {
!r.properties.lock_free
} else {
false
}
} else {
false
}
})
.any(|v| v);
None
}
})) {
let v = prio_to_masks.entry(priority - 1).or_insert(Vec::new());
v.push(quote!(#device::Interrupt::#name as u32));
}
// Call rtic::export::create_mask([u32; N]), where the array is the list of shifts
let mut mask_arr = Vec::new();
// NOTE: 0..3 assumes max 4 priority levels according to M0 spec
for i in 0..3 {
let v = if let Some(v) = prio_to_masks.get(&i) {
v.clone()
} else {
Vec::new()
};
mask_arr.push(quote!(
rtic::export::create_mask([#(#v),*])
));
}
let masks_name = util::priority_masks_ident();
mod_app.push(quote!(
#[doc(hidden)]
#[allow(non_upper_case_globals)]
const #masks_name: [u32; 3] = [#(#mask_arr),*];
));
if uses_exceptions_with_resources {
mod_app.push(quote!(
#[doc(hidden)]
#[allow(non_upper_case_globals)]
const __rtic_internal_V6_ERROR: () = rtic::export::v6_panic();
));
}
(mod_app, mod_resources)
}
|
