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use std::collections::HashMap;
use syn::{Ident, Path};
use syntax::check::{self, Idents, Idle, Init, Statics};
use syntax::{self, Result};
pub struct App {
pub device: Path,
pub idle: Idle,
pub init: Init,
pub resources: Statics,
pub tasks: Tasks,
}
pub type Tasks = HashMap<Ident, Task>;
#[allow(non_camel_case_types)]
pub enum Exception {
PENDSV,
SVCALL,
SYS_TICK,
}
impl Exception {
pub fn from(s: &str) -> Option<Self> {
Some(match s {
"PENDSV" => Exception::PENDSV,
"SVCALL" => Exception::SVCALL,
"SYS_TICK" => Exception::SYS_TICK,
_ => return None,
})
}
pub fn nr(&self) -> usize {
match *self {
Exception::PENDSV => 14,
Exception::SVCALL => 11,
Exception::SYS_TICK => 15,
}
}
}
pub enum Kind {
Exception(Exception),
Interrupt { enabled: bool },
}
pub struct Task {
pub kind: Kind,
pub path: Path,
pub priority: u8,
pub resources: Idents,
}
pub fn app(app: check::App) -> Result<App> {
let app = App {
device: app.device,
idle: app.idle,
init: app.init,
resources: app.resources,
tasks: app.tasks
.into_iter()
.map(|(k, v)| {
let v = ::check::task(&k.to_string(), v)?;
Ok((k, v))
})
.collect::<Result<_>>()?,
};
Ok(app)
}
fn task(name: &str, task: syntax::check::Task) -> Result<Task> {
let kind = match Exception::from(name) {
Some(e) => {
ensure!(
task.enabled.is_none(),
"`enabled` field is not valid for exceptions"
);
Kind::Exception(e)
}
None => Kind::Interrupt {
enabled: task.enabled.unwrap_or(true),
},
};
Ok(Task {
kind,
path: task.path,
priority: task.priority.unwrap_or(1),
resources: task.resources,
})
}
|
