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drop rtfm::Cell

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This commit is contained in:
Jorge Aparicio 2017-07-23 20:51:37 -05:00
parent 03f373fb24
commit f3b397f460
2 changed files with 40 additions and 56 deletions
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54
macros/src/trans.rs
View file

@ -11,6 +11,7 @@ pub fn app(app: &App, ownerships: &Ownerships) -> Tokens {
let mut root = vec![];
let mut main = vec![];
::trans::check(app, &mut main);
::trans::init(app, &mut main, &mut root);
::trans::idle(app, ownerships, &mut main, &mut root);
::trans::resources(app, ownerships, &mut root);
@ -26,6 +27,22 @@ pub fn app(app: &App, ownerships: &Ownerships) -> Tokens {
quote!(#(#root)*)
}
fn check(app: &App, main: &mut Vec<Tokens>) {
if !app.resources.is_empty() {
main.push(quote! {
fn is_send<T>() where T: Send {}
});
}
for resource in app.resources.values() {
let ty = &resource.ty;
main.push(quote! {
is_send::<#ty>();
});
}
}
fn idle(
app: &App,
ownerships: &Ownerships,
@ -79,7 +96,7 @@ fn idle(
rexprs.push(quote! {
#name: #krate::Static::ref_mut(
&mut *#super_::#name.get(),
&mut #super_::#name,
),
});
} else {
@ -180,7 +197,7 @@ fn init(app: &App, main: &mut Vec<Tokens>, root: &mut Vec<Tokens>) {
});
rexprs.push(quote! {
#name: ::#krate::Static::ref_mut(&mut *super::#name.get()),
#name: ::#krate::Static::ref_mut(&mut super::#name),
});
}
@ -288,14 +305,12 @@ fn resources(app: &App, ownerships: &Ownerships, root: &mut Vec<Tokens>) {
match *ownership {
Ownership::Owned { .. } => {
if let Some(resource) = app.resources.get(name) {
// For owned resources we don't need claim() or borrow(),
// just get()
// For owned resources we don't need claim() or borrow()
let expr = &resource.expr;
let ty = &resource.ty;
root.push(quote! {
static #name: #krate::Cell<#ty> =
#krate::Cell::new(#expr);
static mut #name: #ty = #expr;
});
} else {
// Peripheral
@ -308,8 +323,7 @@ fn resources(app: &App, ownerships: &Ownerships, root: &mut Vec<Tokens>) {
let ty = &resource.ty;
root.push(quote! {
static #name: #krate::Cell<#ty> =
#krate::Cell::new(#expr);
static mut #name: #ty = #expr;
});
impl_items.push(quote! {
@ -319,7 +333,7 @@ fn resources(app: &App, ownerships: &Ownerships, root: &mut Vec<Tokens>) {
&'cs self,
_cs: &'cs #krate::CriticalSection,
) -> &'cs #krate::Static<#ty> {
unsafe { #krate::Static::ref_(&*#name.get()) }
unsafe { #krate::Static::ref_(&#name) }
}
fn borrow_mut<'cs>(
@ -327,7 +341,7 @@ fn resources(app: &App, ownerships: &Ownerships, root: &mut Vec<Tokens>) {
_cs: &'cs #krate::CriticalSection,
) -> &'cs mut #krate::Static<#ty> {
unsafe {
#krate::Static::ref_mut(&mut *#name.get())
#krate::Static::ref_mut(&mut #name)
}
}
@ -343,12 +357,11 @@ fn resources(app: &App, ownerships: &Ownerships, root: &mut Vec<Tokens>) {
{
unsafe {
#krate::claim(
#name.get(),
#krate::Static::ref_(&#name),
#ceiling,
#device::NVIC_PRIO_BITS,
t,
f,
|data| #krate::Static::ref_(&*data),
)
}
}
@ -365,12 +378,11 @@ fn resources(app: &App, ownerships: &Ownerships, root: &mut Vec<Tokens>) {
{
unsafe {
#krate::claim(
#name.get(),
#krate::Static::ref_mut(&mut #name),
#ceiling,
#device::NVIC_PRIO_BITS,
t,
f,
|data| #krate::Static::ref_mut(&mut *data),
)
}
}
@ -411,12 +423,13 @@ fn resources(app: &App, ownerships: &Ownerships, root: &mut Vec<Tokens>) {
{
unsafe {
#krate::claim(
#device::#name.get(),
#krate::Static::ref_(
&*#device::#name.get(),
),
#ceiling,
#device::NVIC_PRIO_BITS,
t,
f,
|data| #krate::Static::ref_(&*data),
)
}
}
@ -433,12 +446,13 @@ fn resources(app: &App, ownerships: &Ownerships, root: &mut Vec<Tokens>) {
{
unsafe {
#krate::claim(
#device::#name.get(),
#krate::Static::ref_mut(
&mut *#device::#name.get(),
),
#ceiling,
#device::NVIC_PRIO_BITS,
t,
f,
|data| #krate::Static::ref_mut(&mut *data),
)
}
}
@ -512,9 +526,7 @@ fn tasks(app: &App, ownerships: &Ownerships, root: &mut Vec<Tokens>) {
});
exprs.push(quote! {
#name: ::#krate::Static::ref_mut(
&mut *super::#name.get(),
),
#name: ::#krate::Static::ref_mut(&mut super::#name),
});
} else {
fields.push(quote! {

42
src/lib.rs
View file

@ -63,8 +63,6 @@ extern crate cortex_m;
extern crate cortex_m_rtfm_macros;
extern crate static_ref;
use core::cell::UnsafeCell;
pub use cortex_m::asm::{bkpt, wfi};
pub use cortex_m::interrupt::CriticalSection;
pub use cortex_m::interrupt::free as atomic;
@ -137,68 +135,42 @@ impl<T> Resource for Static<T> {
}
#[doc(hidden)]
pub unsafe fn claim<T, U, R, F, G>(
data: *mut T,
pub unsafe fn claim<T, R, F>(
data: T,
ceiling: u8,
nvic_prio_bits: u8,
t: &mut Threshold,
f: F,
g: G,
) -> R
where
F: FnOnce(U, &mut Threshold) -> R,
G: FnOnce(*mut T) -> U,
F: FnOnce(T, &mut Threshold) -> R,
{
let max_priority = 1 << nvic_prio_bits;
if ceiling > t.value {
match () {
#[cfg(armv6m)]
() => {
atomic(|_| f(g(data), &mut Threshold::new(max_priority)))
atomic(|_| f(data, &mut Threshold::new(max_priority)))
}
#[cfg(not(armv6m))]
() => {
if ceiling == max_priority {
atomic(|_| f(g(data), &mut Threshold::new(max_priority)))
atomic(|_| f(data, &mut Threshold::new(max_priority)))
} else {
let old = basepri::read();
let hw = (max_priority - ceiling) << (8 - nvic_prio_bits);
basepri_max::write(hw);
let ret = f(g(data), &mut Threshold::new(ceiling));
let ret = f(data, &mut Threshold::new(ceiling));
basepri::write(old);
ret
}
}
}
} else {
f(g(data), t)
f(data, t)
}
}
#[doc(hidden)]
pub struct Cell<T> {
data: UnsafeCell<T>,
}
#[doc(hidden)]
impl<T> Cell<T> {
pub const fn new(data: T) -> Self {
Cell {
data: UnsafeCell::new(data),
}
}
pub fn get(&self) -> *mut T {
self.data.get()
}
}
unsafe impl<T> Sync for Cell<T>
where
T: Send,
{
}
/// Preemption threshold token
///
/// The preemption threshold indicates the priority a task must have to preempt