1 files changed, 169 insertions, 0 deletions
diff --git a/macros/src/codegen/software_tasks.rs b/macros/src/codegen/software_tasks.rs
new file mode 100644
index 00000000..4ae37e4e
--- /dev/null
+++ b/macros/src/codegen/software_tasks.rs
@@ -0,0 +1,169 @@
+use proc_macro2::TokenStream as TokenStream2;
+use quote::{format_ident, 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,
+) -> (
+    // mod_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 mod_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)),
+                )
+            };
+            mod_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 {
+                mod_app.push(quote!(
+                    struct #fq<'a> {
+                        priority: &'a rtic::export::Priority,
+                    }
+                ));
+
+                mod_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();
+                mod_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);
+            mod_app.push(quote!(
+                #uninit
+                /// Buffer that holds the inputs of a task
+                static mut #inputs: [core::mem::MaybeUninit<#input_ty>; #cap_lit] =
+                    [#(#elems,)*];
+            ));
+        }
+
+        // `${task}Resources`
+        let mut needs_lt = false;
+        if !task.args.resources.is_empty() {
+            let (item, constructor) = resources_struct::codegen(
+                Context::SoftwareTask(name),
+                task.args.priority,
+                &mut needs_lt,
+                app,
+                analysis,
+            );
+
+            // Add resources to imports
+            let name_res = format_ident!("{}Resources", name);
+            software_tasks_imports.push(quote!(
+                #[allow(non_snake_case)]
+                use super::#name_res;
+            ));
+
+            root.push(item);
+
+            mod_app.push(constructor);
+        }
+
+        // `${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,
+        ));
+    }
+
+    (mod_app, root, user_tasks, software_tasks_imports)
+}