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Merge #192

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192: removes the maybe_uninit feature gate r=japaric a=japaric

and stop newtyping `core::mem::MaybeUninit`

this also fixes CI on nightly

Co-authored-by: Jorge Aparicio <jorge@japaric.io>
This commit is contained in:
bors[bot] 2019-05-21 12:32:21 +00:00
commit eb528ef921
3 changed files with 21 additions and 51 deletions
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41
macros/src/codegen.rs
View file

@ -229,8 +229,8 @@ fn resources(
const_app.push(quote!(
#(#attrs)*
#(#cfgs)*
static mut #name: rtfm::export::MaybeUninit<#ty> =
rtfm::export::MaybeUninit::uninit();
static mut #name: core::mem::MaybeUninit<#ty> =
core::mem::MaybeUninit::uninit();
));
}
@ -580,21 +580,21 @@ fn tasks(
let task_fq = mk_fq_ident(name);
let elems = (0..cap)
.map(|_| quote!(rtfm::export::MaybeUninit::uninit()))
.map(|_| quote!(core::mem::MaybeUninit::uninit()))
.collect::<Vec<_>>();
if cfg!(feature = "timer-queue") {
let elems = elems.clone();
const_app.push(quote!(
/// Buffer that holds the instants associated to the inputs of a task
static mut #task_instants: [rtfm::export::MaybeUninit<rtfm::Instant>; #cap_lit] =
static mut #task_instants: [core::mem::MaybeUninit<rtfm::Instant>; #cap_lit] =
[#(#elems,)*];
));
}
const_app.push(quote!(
/// Buffer that holds the inputs of a task
static mut #task_inputs: [rtfm::export::MaybeUninit<#ty>; #cap_lit] =
static mut #task_inputs: [core::mem::MaybeUninit<#ty>; #cap_lit] =
[#(#elems,)*];
));
@ -612,8 +612,8 @@ fn tasks(
} else {
const_app.push(quote!(
#[doc = #doc]
static mut #task_fq: rtfm::export::MaybeUninit<#fq_ty> =
rtfm::export::MaybeUninit::uninit();
static mut #task_fq: core::mem::MaybeUninit<#fq_ty> =
core::mem::MaybeUninit::uninit();
));
quote!(#task_fq.as_mut_ptr())
@ -717,8 +717,8 @@ fn dispatchers(app: &App, analysis: &Analysis) -> Vec<proc_macro2::TokenStream>
} else {
items.push(quote!(
#[doc = #doc]
static mut #rq: rtfm::export::MaybeUninit<#rq_ty> =
rtfm::export::MaybeUninit::uninit();
static mut #rq: core::mem::MaybeUninit<#rq_ty> =
core::mem::MaybeUninit::uninit();
));
quote!(#rq.as_mut_ptr())
@ -771,7 +771,7 @@ fn dispatchers(app: &App, analysis: &Analysis) -> Vec<proc_macro2::TokenStream>
let inputs = mk_inputs_ident(name);
let fq = mk_fq_ident(name);
let input = quote!(#inputs.get_unchecked(usize::from(index)).read());
let input = quote!(#inputs.get_unchecked(usize::from(index)).as_ptr().read());
let fq = if cfg!(feature = "nightly") {
quote!(#fq)
} else {
@ -780,7 +780,8 @@ fn dispatchers(app: &App, analysis: &Analysis) -> Vec<proc_macro2::TokenStream>
let (let_instant, _instant) = if cfg!(feature = "timer-queue") {
let instants = mk_instants_ident(name);
let instant = quote!(#instants.get_unchecked(usize::from(index)).read());
let instant =
quote!(#instants.get_unchecked(usize::from(index)).as_ptr().read());
(
Some(quote!(let instant = #instant;)),
@ -992,7 +993,7 @@ fn timer_queue(app: &App, analysis: &Analysis) -> Vec<proc_macro2::TokenStream>
let ty = quote!(rtfm::export::TimerQueue<T, #cap>);
items.push(quote!(
/// The timer queue
static mut TQ: rtfm::export::MaybeUninit<#ty> = rtfm::export::MaybeUninit::uninit();
static mut TQ: core::mem::MaybeUninit<#ty> = core::mem::MaybeUninit::uninit();
));
items.push(quote!(
@ -1178,7 +1179,7 @@ fn pre_init(app: &App, analysis: &Analysis) -> Vec<proc_macro2::TokenStream> {
// initialize `MaybeUninit` `ReadyQueue`s
for level in analysis.dispatchers.keys() {
let rq = mk_rq_ident(*level);
stmts.push(quote!(#rq.write(rtfm::export::ReadyQueue::u8_sc());))
stmts.push(quote!(#rq.as_mut_ptr().write(rtfm::export::ReadyQueue::u8_sc());))
}
// initialize `MaybeUninit` `FreeQueue`s
@ -1186,7 +1187,7 @@ fn pre_init(app: &App, analysis: &Analysis) -> Vec<proc_macro2::TokenStream> {
let fq = mk_fq_ident(name);
stmts.push(quote!(
let fq = #fq.write(rtfm::export::FreeQueue::u8_sc());
let fq = #fq.as_mut_ptr().write(rtfm::export::FreeQueue::u8_sc());
));
// populate the `FreeQueue`s
@ -1217,7 +1218,7 @@ fn pre_init(app: &App, analysis: &Analysis) -> Vec<proc_macro2::TokenStream> {
// Initialize the timer queue
if !analysis.timer_queue.tasks.is_empty() {
stmts.push(quote!(TQ.write(rtfm::export::TimerQueue::new(core.SYST));));
stmts.push(quote!(TQ.as_mut_ptr().write(rtfm::export::TimerQueue::new(core.SYST));));
}
// set interrupts priorities
@ -1431,7 +1432,7 @@ fn post_init(app: &App, analysis: &Analysis) -> Vec<proc_macro2::TokenStream> {
continue;
}
stmts.push(quote!(#name.write(late.#name);));
stmts.push(quote!(#name.as_mut_ptr().write(late.#name);));
}
// set exception priorities
@ -2252,7 +2253,7 @@ fn mk_spawn_body<'a>(
let instants = mk_instants_ident(name);
Some(quote!(
#instants.get_unchecked_mut(usize::from(index)).write(instant);
#instants.get_unchecked_mut(usize::from(index)).as_mut_ptr().write(instant);
))
} else {
None
@ -2287,7 +2288,7 @@ fn mk_spawn_body<'a>(
let input = #tupled;
if let Some(index) = #dequeue {
#inputs.get_unchecked_mut(usize::from(index)).write(input);
#inputs.get_unchecked_mut(usize::from(index)).as_mut_ptr().write(input);
#write_instant
@ -2338,9 +2339,9 @@ fn mk_schedule_body<'a>(scheduler: &Ident, name: &Ident, app: &'a App) -> proc_m
let input = #tupled;
if let Some(index) = #dequeue {
#instants.get_unchecked_mut(usize::from(index)).write(instant);
#instants.get_unchecked_mut(usize::from(index)).as_mut_ptr().write(instant);
#inputs.get_unchecked_mut(usize::from(index)).write(input);
#inputs.get_unchecked_mut(usize::from(index)).as_mut_ptr().write(input);
let nr = rtfm::export::NotReady {
instant,

30
src/export.rs
View file

@ -68,36 +68,6 @@ impl Priority {
}
}
// We newtype `core::mem::MaybeUninit` so the end-user doesn't need `#![feature(maybe_uninit)]` in
// their code
pub struct MaybeUninit<T> {
inner: core::mem::MaybeUninit<T>,
}
impl<T> MaybeUninit<T> {
pub const fn uninit() -> Self {
MaybeUninit {
inner: core::mem::MaybeUninit::uninit(),
}
}
pub fn as_ptr(&self) -> *const T {
self.inner.as_ptr()
}
pub fn as_mut_ptr(&mut self) -> *mut T {
self.inner.as_mut_ptr()
}
pub unsafe fn read(&self) -> T {
self.inner.read()
}
pub fn write(&mut self, value: T) -> &mut T {
self.inner.write(value)
}
}
#[inline(always)]
pub fn assert_send<T>()
where

1
src/lib.rs
View file

@ -43,7 +43,6 @@
//! language feature to reduce static memory usage, runtime overhead and initialization overhead.
//! This feature requires a nightly compiler and may stop working at any time!
#![feature(maybe_uninit)]
#![deny(missing_docs)]
#![deny(warnings)]
#![no_std]