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use syn::parse;
//use syn::Ident;
//use proc_macro2::{Ident, Span};
use proc_macro2::Ident;
use rtfm_syntax::{
analyze::{Analysis, Ownership},
ast::App,
};
use syn::Error;
// ast::{App, CustomArg},
type Idents<'a> = Vec<&'a Ident>;
// Assign an `extern` interrupt to each priority level
pub fn app(app: &App, _analysis: &Analysis) -> parse::Result<()> {
// collect task local resources
let task_local: Idents = app
.resources
.iter()
.filter(|(_, r)| r.properties.task_local)
.map(|(i, _)| i)
.chain(
app.late_resources
.iter()
.filter(|(_, r)| r.properties.task_local)
.map(|(i, _)| i),
)
.collect();
let lock_free: Idents = app
.resources
.iter()
.filter(|(_, r)| r.properties.lock_free)
.map(|(i, _)| i)
.chain(
app.late_resources
.iter()
.filter(|(_, r)| r.properties.lock_free)
.map(|(i, _)| i),
)
.collect();
// collect all tasks into a vector
type Task = String;
let all_tasks: Vec<(Task, Idents)> = app
.idles
.iter()
.map(|(core, ht)| {
(
format!("Idle (core {})", core),
ht.args.resources.iter().map(|(v, _)| v).collect::<Vec<_>>(),
)
})
.chain(app.software_tasks.iter().map(|(name, ht)| {
(
name.to_string(),
ht.args.resources.iter().map(|(v, _)| v).collect::<Vec<_>>(),
)
}))
.chain(app.hardware_tasks.iter().map(|(name, ht)| {
(
name.to_string(),
ht.args.resources.iter().map(|(v, _)| v).collect::<Vec<_>>(),
)
}))
.collect();
// check that task_local resources is only used once
let mut error = vec![];
for task_local_id in task_local.iter() {
let mut used = vec![];
for (task, tr) in all_tasks.iter() {
for r in tr {
if task_local_id == r {
used.push((task, r));
}
}
}
if used.len() > 1 {
error.push(Error::new(
task_local_id.span(),
format!(
"task local resource {:?} is used by multiple tasks",
task_local_id.to_string()
),
));
used.iter().for_each(|(task, resource)| {
error.push(Error::new(
resource.span(),
format!(
"task local resource {:?} is used by task {:?}",
resource.to_string(),
task
),
))
});
}
}
// filter out contended resources
let contended: Vec<(&Ident, &Ownership)> = _analysis
.ownerships
.iter()
.filter(|(_id, own)| match own {
Ownership::Contended { .. } => true,
_ => false,
})
.collect();
// filter out lock_free contended resources
let lock_free_violation: Vec<&(&Ident, &Ownership)> = contended
.iter()
.filter(|(cont_id, _)| lock_free.iter().any(|lf_id| cont_id == lf_id))
.collect();
// report contention error
lock_free_violation.iter().for_each(|(lf_err_id, _)| {
error.push(Error::new(
lf_err_id.span(),
format!(
"lock_free resource {:?} is contended by higher priority task",
lf_err_id.to_string()
),
))
});
// collect errors
if error.is_empty() {
Ok(())
} else {
let mut err = error.iter().next().unwrap().clone();
error.iter().for_each(|e| err.combine(e.clone()));
Err(err)
}
// for tl in task_local {
// println!("tl {:?}", tl);
// // let mut first_use = None;
// for i in _analysis.ownerships.iter() {
// println!("\nown: {:?}", i);
// }
// // println!("analysis {:?}", _analysis.locations);
// for i in _analysis.locations.iter() {
// println!("\nloc: {:?}", i);
// }
// ErrorMessage {
// // Span is implemented as an index into a thread-local interner to keep the
// // size small. It is not safe to access from a different thread. We want
// // errors to be Send and Sync to play nicely with the Failure crate, so pin
// // the span we're given to its original thread and assume it is
// // Span::call_site if accessed from any other thread.
// start_span: ThreadBound<Span>,
// end_span: ThreadBound<Span>,
// message: String,
// }
// (app.name, "here");
// let span = app.name.span();
// let start = span.start();
// Err(vec![ErrorMessage { start_span: app.name.}]);
// let mut task_locals = Vec::new();
// println!("-- app:late_resources");
// println!(
// "task_locals {:?}",
// app.late_resources.filter(|r| r.task_local)
// );
// println!("-- resources");
// for i in app.resources.iter() {
// println!("res: {:?}", i);
// }
}
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