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use std::collections::HashSet;
use syn::parse;
use crate::syntax::ast::App;
pub fn app(app: &App) -> parse::Result<()> {
// Check that all referenced resources have been declared
// Check that resources are NOT `Exclusive`-ly shared
let mut owners = HashSet::new();
for (_, name, access) in app.shared_resource_accesses() {
if app.shared_resources.get(name).is_none() {
return Err(parse::Error::new(
name.span(),
"this shared resource has NOT been declared",
));
}
if access.is_exclusive() {
owners.insert(name);
}
}
for name in app.local_resource_accesses() {
if app.local_resources.get(name).is_none() {
return Err(parse::Error::new(
name.span(),
"this local resource has NOT been declared",
));
}
}
// Check that no resource has both types of access (`Exclusive` & `Shared`)
let exclusive_accesses = app
.shared_resource_accesses()
.filter_map(|(priority, name, access)| {
if priority.is_some() && access.is_exclusive() {
Some(name)
} else {
None
}
})
.collect::<HashSet<_>>();
for (_, name, access) in app.shared_resource_accesses() {
if access.is_shared() && exclusive_accesses.contains(name) {
return Err(parse::Error::new(
name.span(),
"this implementation doesn't support shared (`&-`) - exclusive (`&mut-`) locks; use `x` instead of `&x`",
));
}
}
// check that dispatchers are not used as hardware tasks
for task in app.hardware_tasks.values() {
let binds = &task.args.binds;
if app.args.dispatchers.contains_key(binds) {
return Err(parse::Error::new(
binds.span(),
"dispatcher interrupts can't be used as hardware tasks",
));
}
}
Ok(())
}
|
