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authorGravatar Emil Fresk <emil.fresk@gmail.com> 2021-07-05 21:40:01 +0200
committerGravatar Emil Fresk <emil.fresk@gmail.com> 2021-07-05 21:40:01 +0200
commit3f85cb5caf1ae930e6551e139978ceec859a2348 (patch)
tree8c29ac6fa1095f33cf984d2565e2e7bea9504566 /macros/src/codegen/local_resources.rs
parent13dc3992e616d817e38c167c4b47db816855f18b (diff)
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Started work
Diffstat (limited to 'macros/src/codegen/local_resources.rs')
-rw-r--r--macros/src/codegen/local_resources.rs146
1 files changed, 146 insertions, 0 deletions
diff --git a/macros/src/codegen/local_resources.rs b/macros/src/codegen/local_resources.rs
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+++ b/macros/src/codegen/local_resources.rs
@@ -0,0 +1,146 @@
+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 `local` variables and local 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.local_resources {
+ // let expr = &res.expr; // TODO: Extract from tasks???...
+ let cfgs = &res.cfgs;
+ let ty = &res.ty;
+ let mangled_name = util::mark_internal_ident(&name);
+
+ {
+ // late resources in `util::link_section_uninit`
+ let section = if expr.is_none() {
+ util::link_section_uninit(true)
+ } else {
+ None
+ };
+
+ // resource type and assigned value
+ let (ty, expr) = if let Some(expr) = expr {
+ // early resource
+ (
+ quote!(rtic::RacyCell<#ty>),
+ quote!(rtic::RacyCell::new(#expr)),
+ )
+ } else {
+ // late resource
+ (
+ quote!(rtic::RacyCell<core::mem::MaybeUninit<#ty>>),
+ quote!(rtic::RacyCell::new(core::mem::MaybeUninit::uninit())),
+ )
+ };
+
+ let attrs = &res.attrs;
+
+ // For future use
+ // let doc = format!(" RTIC internal: {}:{}", file!(), line!());
+ mod_app.push(quote!(
+ #[allow(non_upper_case_globals)]
+ // #[doc = #doc]
+ #[doc(hidden)]
+ #(#attrs)*
+ #(#cfgs)*
+ #section
+ static #mangled_name: #ty = #expr;
+ ));
+ }
+
+ let r_prop = &res.properties;
+ // For future use
+ // let doc = format!(" RTIC internal: {}:{}", file!(), line!());
+
+ if !r_prop.task_local && !r_prop.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, _doc) = if expr.is_none() {
+ // late resource
+ (
+ quote!(
+ #(#cfgs)*
+ #mangled_name.get_mut_unchecked().as_mut_ptr()
+ ),
+ "late",
+ )
+ } else {
+ // early resource
+ (
+ quote!(
+ #(#cfgs)*
+ #mangled_name.get_mut_unchecked()
+ ),
+ "early",
+ )
+ };
+
+ 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 resources {
+ use rtic::export::Priority;
+
+ #(#mod_resources)*
+ })
+ };
+
+ (mod_app, mod_resources)
+}