rtfm-syntax refactor + heterogeneous multi-core support

1 files changed, 92 insertions, 0 deletions

diff --git a/macros/src/codegen/idle.rs b/macros/src/codegen/idle.rs
new file mode 100644
index 00000000..7af01c91
--- /dev/null
+++ b/macros/src/codegen/idle.rs
@@ -0,0 +1,92 @@
+use proc_macro2::TokenStream as TokenStream2;
+use quote::quote;
+use rtfm_syntax::{ast::App, Context};
+
+use crate::{
+    analyze::Analysis,
+    check::Extra,
+    codegen::{locals, module, resources_struct, util},
+};
+
+/// Generates support code for `#[idle]` functions
+pub fn codegen(
+    core: u8,
+    app: &App,
+    analysis: &Analysis,
+    extra: &Extra,
+) -> (
+    // const_app_idle -- the `${idle}Resources` constructor
+    Option<TokenStream2>,
+    // root_idle -- items that must be placed in the root of the crate:
+    // - the `${idle}Locals` struct
+    // - the `${idle}Resources` struct
+    // - the `${idle}` module, which contains types like `${idle}::Context`
+    Vec<TokenStream2>,
+    // user_idle
+    Option<TokenStream2>,
+    // call_idle
+    TokenStream2,
+) {
+    if let Some(idle) = app.idles.get(&core) {
+        let mut needs_lt = false;
+        let mut const_app = None;
+        let mut root_idle = vec![];
+        let mut locals_pat = None;
+        let mut locals_new = None;
+
+        if !idle.args.resources.is_empty() {
+            let (item, constructor) =
+                resources_struct::codegen(Context::Idle(core), 0, &mut needs_lt, app, analysis);
+
+            root_idle.push(item);
+            const_app = Some(constructor);
+        }
+
+        let name = &idle.name;
+        if !idle.locals.is_empty() {
+            let (locals, pat) = locals::codegen(Context::Idle(core), &idle.locals, app);
+
+            locals_new = Some(quote!(#name::Locals::new()));
+            locals_pat = Some(pat);
+            root_idle.push(locals);
+        }
+
+        root_idle.push(module::codegen(Context::Idle(core), needs_lt, app, extra));
+
+        let cfg_core = util::cfg_core(core, app.args.cores);
+        let attrs = &idle.attrs;
+        let context = &idle.context;
+        let stmts = &idle.stmts;
+        let user_idle = Some(quote!(
+            #cfg_core
+            #(#attrs)*
+            #[allow(non_snake_case)]
+            fn #name(#(#locals_pat,)* #context: #name::Context) -> ! {
+                use rtfm::Mutex as _;
+
+                #(#stmts)*
+            }
+        ));
+
+        let call_idle = quote!(#name(
+            #(#locals_new,)*
+            #name::Context::new(&rtfm::export::Priority::new(0))
+        ));
+
+        (
+            const_app,
+            root_idle,
+            user_idle,
+            call_idle,
+        )
+    } else {
+        (
+            None,
+            vec![],
+            None,
+            quote!(loop {
+                rtfm::export::wfi()
+            }),
+        )
+    }
+}