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author | 2021-07-05 21:40:01 +0200 | |
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committer | 2021-07-05 21:40:01 +0200 | |
commit | 3f85cb5caf1ae930e6551e139978ceec859a2348 (patch) | |
tree | 8c29ac6fa1095f33cf984d2565e2e7bea9504566 /macros/src/codegen/local_resources.rs | |
parent | 13dc3992e616d817e38c167c4b47db816855f18b (diff) | |
download | rtic-3f85cb5caf1ae930e6551e139978ceec859a2348.tar.gz rtic-3f85cb5caf1ae930e6551e139978ceec859a2348.tar.zst rtic-3f85cb5caf1ae930e6551e139978ceec859a2348.zip |
Started work
Diffstat (limited to 'macros/src/codegen/local_resources.rs')
-rw-r--r-- | macros/src/codegen/local_resources.rs | 146 |
1 files changed, 146 insertions, 0 deletions
diff --git a/macros/src/codegen/local_resources.rs b/macros/src/codegen/local_resources.rs new file mode 100644 index 00000000..dd3cbb44 --- /dev/null +++ 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) +} |