mirror/rtic
1
0
Fork 0
mirror of https://github.com/rtic-rs/rtic.git synced 2024-11-23 12:12:50 +01:00
Code Issues Projects Releases Packages Wiki Activity

wip2

Browse source
This commit is contained in:
Per Lindgren 2020-06-13 00:19:01 +02:00
parent 3c208003f5
commit c360ffaad8
7 changed files with 270 additions and 41 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

1
examples/lock2.rs
View file

@ -7,6 +7,7 @@
use cortex_m_semihosting::debug;
use lm3s6965::Interrupt;
use panic_semihosting as _;
#[rtic::app(device = lm3s6965)]
const APP: () = {

62
examples/lock3.rs Normal file
View file

@ -0,0 +1,62 @@
//! examples/lock.rs
#![deny(unsafe_code)]
#![deny(warnings)]
#![no_main]
#![no_std]
use cortex_m_semihosting::{debug, hprintln};
use lm3s6965::Interrupt;
use panic_semihosting as _;
#[rtic::app(device = lm3s6965)]
const APP: () = {
struct Resources {
#[init(0)]
shared: u32,
}
#[init]
fn init(_: init::Context) {
rtic::pend(Interrupt::GPIOA);
}
// when omitted priority is assumed to be `1`
#[task(binds = GPIOA, resources = [shared])]
fn gpioa(c: gpioa::Context) {
hprintln!("A").unwrap();
// the lower priority task requires a critical section to access the data
c.resources.shared.lock(|shared| {
// data can only be modified within this critical section (closure)
*shared += 1;
// GPIOB will *not* run right now due to the critical section
rtic::pend(Interrupt::GPIOB);
hprintln!("B - shared = {}", *shared).unwrap();
// GPIOC does not contend for `shared` so it's allowed to run now
rtic::pend(Interrupt::GPIOC);
});
// critical section is over: GPIOB can now start
hprintln!("E").unwrap();
debug::exit(debug::EXIT_SUCCESS);
}
#[task(binds = GPIOB, priority = 2, resources = [shared])]
fn gpiob(c: gpiob::Context) {
// the higher priority task does *not* need a critical section
*c.resources.shared += 1;
hprintln!("D - shared = {}", *c.resources.shared).unwrap();
}
#[task(binds = GPIOC, priority = 3)]
fn gpioc(_: gpioc::Context) {
hprintln!("C").unwrap();
}
};

61
expand_lock.rs
View file

@ -1,5 +1,5 @@
#![feature(prelude_import)]
//! examples/lock2.rs
//! examples/lock.rs
#![deny(unsafe_code)]
#![deny(warnings)]
#![no_main]
@ -10,8 +10,9 @@ use core::prelude::v1::*;
extern crate core;
#[macro_use]
extern crate compiler_builtins;
use cortex_m_semihosting::debug;
use cortex_m_semihosting::{debug, hprintln};
use lm3s6965::Interrupt;
use panic_semihosting as _;
#[allow(non_snake_case)]
fn init(_: init::Context) {
rtic::pend(Interrupt::GPIOA);
@ -19,16 +20,44 @@ fn init(_: init::Context) {
#[allow(non_snake_case)]
fn gpioa(mut c: gpioa::Context) {
use rtic::Mutex as _;
::cortex_m_semihosting::export::hstdout_str("A\n").unwrap();
c.resources.shared.lock(|shared| {
*shared += 1;
rtic::pend(Interrupt::GPIOB);
::cortex_m_semihosting::export::hstdout_fmt(::core::fmt::Arguments::new_v1(
&["B - shared = ", "\n"],
&match (&*shared,) {
(arg0,) => [::core::fmt::ArgumentV1::new(
arg0,
::core::fmt::Display::fmt,
)],
},
))
.unwrap();
rtic::pend(Interrupt::GPIOC);
});
::cortex_m_semihosting::export::hstdout_str("E\n").unwrap();
debug::exit(debug::EXIT_SUCCESS);
}
#[allow(non_snake_case)]
fn gpiob(c: gpiob::Context) {
use rtic::Mutex as _;
*c.resources.shared += 1;
::cortex_m_semihosting::export::hstdout_fmt(::core::fmt::Arguments::new_v1(
&["D - shared = ", "\n"],
&match (&*c.resources.shared,) {
(arg0,) => [::core::fmt::ArgumentV1::new(
arg0,
::core::fmt::Display::fmt,
)],
},
))
.unwrap();
}
#[allow(non_snake_case)]
fn gpioc(_: gpioc::Context) {
use rtic::Mutex as _;
::cortex_m_semihosting::export::hstdout_str("C\n").unwrap();
}
#[allow(non_snake_case)]
///Initialization function
@ -47,19 +76,31 @@ pub mod init {
}
mod resources {
use rtic::export::Priority;
use core::cell::Cell;
#[allow(non_camel_case_types)]
pub struct shared<'a> {
priority: &'a Priority,
locked: Cell<bool>,
}
impl<'a> shared<'a> {
#[inline(always)]
pub unsafe fn new(priority: &'a Priority) -> Self {
shared { priority }
shared {
priority,
locked: Cell::new(false),
}
}
#[inline(always)]
pub unsafe fn priority(&self) -> &Priority {
self.priority
}
#[inline(always)]
pub unsafe fn get_locked(&self) -> bool {
self.locked.get()
}
pub unsafe fn set_locked(&self, b: bool) {
self.locked.set(b);
}
}
}
#[allow(non_snake_case)]
@ -110,5 +151,17 @@ pub mod gpiob {
}
}
}
#[allow(non_snake_case)]
///Hardware task
pub mod gpioc {
/// Execution context
pub struct Context {}
impl Context {
#[inline(always)]
pub unsafe fn new(priority: &rtic::export::Priority) -> Self {
Context {}
}
}
}
/// Implementation details
const APP: () = { # [ doc = r" Always include the device crate which contains the vector table" ] use lm3s6965 as _ ; # [ allow ( non_upper_case_globals ) ] static mut shared : u32 = 0 ; impl < 'a > rtic :: Mutex for resources :: shared < 'a > { type T = u32 ; # [ inline ( always ) ] fn lock < R > ( & mut self , f : impl FnOnce ( & mut u32 ) -> R ) -> R { # [ doc = r" Priority ceiling" ] const CEILING : u8 = 2u8 ; unsafe { rtic :: export :: lock ( & mut shared , self . priority ( ) , CEILING , lm3s6965 :: NVIC_PRIO_BITS , f ) } } } # [ allow ( non_snake_case ) ] # [ no_mangle ] unsafe fn GPIOA ( ) { const PRIORITY : u8 = 1u8 ; rtic :: export :: run ( PRIORITY , | | { crate :: gpioa ( gpioa :: Context :: new ( & rtic :: export :: Priority :: new ( PRIORITY ) ) ) } ) ; } impl < 'a > gpioaResources < 'a > { # [ inline ( always ) ] unsafe fn new ( priority : & 'a rtic :: export :: Priority ) -> Self { gpioaResources { shared : resources :: shared :: new ( priority ) , } } } # [ allow ( non_snake_case ) ] # [ no_mangle ] unsafe fn GPIOB ( ) { const PRIORITY : u8 = 2u8 ; rtic :: export :: run ( PRIORITY , | | { crate :: gpiob ( gpiob :: Context :: new ( & rtic :: export :: Priority :: new ( PRIORITY ) ) ) } ) ; } impl < 'a > gpiobResources < 'a > { # [ inline ( always ) ] unsafe fn new ( priority : & 'a rtic :: export :: Priority ) -> Self { gpiobResources { shared : & mut shared , } } } # [ no_mangle ] unsafe extern "C" fn main ( ) -> ! { let _TODO : ( ) = ( ) ; rtic :: export :: interrupt :: disable ( ) ; let mut core : rtic :: export :: Peripherals = core :: mem :: transmute ( ( ) ) ; let _ = [ ( ) ; ( ( 1 << lm3s6965 :: NVIC_PRIO_BITS ) - 1u8 as usize ) ] ; core . NVIC . set_priority ( lm3s6965 :: Interrupt :: GPIOA , rtic :: export :: logical2hw ( 1u8 , lm3s6965 :: NVIC_PRIO_BITS ) ) ; rtic :: export :: NVIC :: unmask ( lm3s6965 :: Interrupt :: GPIOA ) ; let _ = [ ( ) ; ( ( 1 << lm3s6965 :: NVIC_PRIO_BITS ) - 2u8 as usize ) ] ; core . NVIC . set_priority ( lm3s6965 :: Interrupt :: GPIOB , rtic :: export :: logical2hw ( 2u8 , lm3s6965 :: NVIC_PRIO_BITS ) ) ; rtic :: export :: NVIC :: unmask ( lm3s6965 :: Interrupt :: GPIOB ) ; core . SCB . scr . modify ( | r | r | 1 << 1 ) ; let late = crate :: init ( init :: Context :: new ( core . into ( ) ) ) ; rtic :: export :: interrupt :: enable ( ) ; loop { rtic :: export :: wfi ( ) } } };
const APP: () = { # [ doc = r" Always include the device crate which contains the vector table" ] use lm3s6965 as _ ; # [ allow ( non_upper_case_globals ) ] static mut shared : u32 = 0 ; impl < 'a > rtic :: Mutex for resources :: shared < 'a > { type T = u32 ; # [ inline ( always ) ] fn lock < R > ( & mut self , f : impl FnOnce ( & mut u32 ) -> R ) -> R { # [ doc = r" Priority ceiling" ] const CEILING : u8 = 2u8 ; if self . get_locked ( ) { :: core :: panicking :: panic ( "Resource locked in sequential context" ) ; } ; self . set_locked ( true ) ; let r = unsafe { rtic :: export :: lock ( & mut shared , self . priority ( ) , CEILING , lm3s6965 :: NVIC_PRIO_BITS , f ) } ; self . set_locked ( false ) ; r } } # [ allow ( non_snake_case ) ] # [ no_mangle ] unsafe fn GPIOA ( ) { const PRIORITY : u8 = 1u8 ; rtic :: export :: run ( PRIORITY , | | { crate :: gpioa ( gpioa :: Context :: new ( & rtic :: export :: Priority :: new ( PRIORITY ) ) ) } ) ; } impl < 'a > gpioaResources < 'a > { # [ inline ( always ) ] unsafe fn new ( priority : & 'a rtic :: export :: Priority ) -> Self { gpioaResources { shared : resources :: shared :: new ( priority ) , } } } # [ allow ( non_snake_case ) ] # [ no_mangle ] unsafe fn GPIOB ( ) { const PRIORITY : u8 = 2u8 ; rtic :: export :: run ( PRIORITY , | | { crate :: gpiob ( gpiob :: Context :: new ( & rtic :: export :: Priority :: new ( PRIORITY ) ) ) } ) ; } impl < 'a > gpiobResources < 'a > { # [ inline ( always ) ] unsafe fn new ( priority : & 'a rtic :: export :: Priority ) -> Self { gpiobResources { shared : & mut shared , } } } # [ allow ( non_snake_case ) ] # [ no_mangle ] unsafe fn GPIOC ( ) { const PRIORITY : u8 = 3u8 ; rtic :: export :: run ( PRIORITY , | | { crate :: gpioc ( gpioc :: Context :: new ( & rtic :: export :: Priority :: new ( PRIORITY ) ) ) } ) ; } # [ no_mangle ] unsafe extern "C" fn main ( ) -> ! { let _TODO : ( ) = ( ) ; rtic :: export :: interrupt :: disable ( ) ; let mut core : rtic :: export :: Peripherals = core :: mem :: transmute ( ( ) ) ; let _ = [ ( ) ; ( ( 1 << lm3s6965 :: NVIC_PRIO_BITS ) - 1u8 as usize ) ] ; core . NVIC . set_priority ( lm3s6965 :: Interrupt :: GPIOA , rtic :: export :: logical2hw ( 1u8 , lm3s6965 :: NVIC_PRIO_BITS ) ) ; rtic :: export :: NVIC :: unmask ( lm3s6965 :: Interrupt :: GPIOA ) ; let _ = [ ( ) ; ( ( 1 << lm3s6965 :: NVIC_PRIO_BITS ) - 2u8 as usize ) ] ; core . NVIC . set_priority ( lm3s6965 :: Interrupt :: GPIOB , rtic :: export :: logical2hw ( 2u8 , lm3s6965 :: NVIC_PRIO_BITS ) ) ; rtic :: export :: NVIC :: unmask ( lm3s6965 :: Interrupt :: GPIOB ) ; let _ = [ ( ) ; ( ( 1 << lm3s6965 :: NVIC_PRIO_BITS ) - 3u8 as usize ) ] ; core . NVIC . set_priority ( lm3s6965 :: Interrupt :: GPIOC , rtic :: export :: logical2hw ( 3u8 , lm3s6965 :: NVIC_PRIO_BITS ) ) ; rtic :: export :: NVIC :: unmask ( lm3s6965 :: Interrupt :: GPIOC ) ; core . SCB . scr . modify ( | r | r | 1 << 1 ) ; let late = crate :: init ( init :: Context :: new ( core . into ( ) ) ) ; rtic :: export :: interrupt :: enable ( ) ; loop { rtic :: export :: wfi ( ) } } };

168
expand_lock2.rs
View file

@ -1,5 +1,5 @@
#![feature(prelude_import)]
//! examples/lock2.rs
//! examples/lock.rs
#![deny(unsafe_code)]
#![deny(warnings)]
#![no_main]
@ -10,8 +10,9 @@ use core::prelude::v1::*;
extern crate core;
#[macro_use]
extern crate compiler_builtins;
use cortex_m_semihosting::debug;
use cortex_m_semihosting::{debug, hprintln};
use lm3s6965::Interrupt;
use panic_semihosting as _;
#[allow(non_snake_case)]
fn init(_: init::Context) {
rtic::pend(Interrupt::GPIOA);
@ -19,16 +20,44 @@ fn init(_: init::Context) {
#[allow(non_snake_case)]
fn gpioa(mut c: gpioa::Context) {
use rtic::Mutex as _;
::cortex_m_semihosting::export::hstdout_str("A\n").unwrap();
c.resources.shared.lock(|shared| {
*shared += 1;
rtic::pend(Interrupt::GPIOB);
::cortex_m_semihosting::export::hstdout_fmt(::core::fmt::Arguments::new_v1(
&["B - shared = ", "\n"],
&match (&*shared,) {
(arg0,) => [::core::fmt::ArgumentV1::new(
arg0,
::core::fmt::Display::fmt,
)],
},
))
.unwrap();
rtic::pend(Interrupt::GPIOC);
});
::cortex_m_semihosting::export::hstdout_str("E\n").unwrap();
debug::exit(debug::EXIT_SUCCESS);
}
#[allow(non_snake_case)]
fn gpiob(c: gpiob::Context) {
use rtic::Mutex as _;
*c.resources.shared += 1;
::cortex_m_semihosting::export::hstdout_fmt(::core::fmt::Arguments::new_v1(
&["D - shared = ", "\n"],
&match (&*c.resources.shared,) {
(arg0,) => [::core::fmt::ArgumentV1::new(
arg0,
::core::fmt::Display::fmt,
)],
},
))
.unwrap();
}
#[allow(non_snake_case)]
fn gpioc(_: gpioc::Context) {
use rtic::Mutex as _;
::cortex_m_semihosting::export::hstdout_str("C\n").unwrap();
}
#[allow(non_snake_case)]
///Initialization function
@ -46,8 +75,8 @@ pub mod init {
}
}
mod resources {
use rtic::export::Priority;
use core::cell::Cell;
use rtic::export::Priority;
#[allow(non_camel_case_types)]
pub struct shared<'a> {
priority: &'a Priority,
@ -73,37 +102,11 @@ mod resources {
self.locked.set(true);
}
}
#[allow(non_camel_case_types)]
pub struct shared2<'a> {
priority: &'a Priority,
locked: Cell<bool>,
}
impl<'a> shared2<'a> {
#[inline(always)]
pub unsafe fn new(priority: &'a Priority) -> Self {
shared2 {
priority,
locked: Cell::new(false),
}
}
#[inline(always)]
pub unsafe fn priority(&self) -> &Priority {
self.priority
}
#[inline(always)]
pub unsafe fn is_locked(&self) -> bool {
self.locked.get()
}
pub unsafe fn lock(&self) {
self.locked.set(true);
}
}
}
#[allow(non_snake_case)]
///Resources `gpioa` has access to
pub struct gpioaResources<'a> {
pub shared: resources::shared<'a>,
pub shared2: resources::shared2<'a>,
}
#[allow(non_snake_case)]
///Hardware task
@ -128,7 +131,6 @@ pub mod gpioa {
///Resources `gpiob` has access to
pub struct gpiobResources<'a> {
pub shared: &'a mut u32,
pub shared2: &'a mut u32,
}
#[allow(non_snake_case)]
///Hardware task
@ -149,5 +151,109 @@ pub mod gpiob {
}
}
}
#[allow(non_snake_case)]
///Hardware task
pub mod gpioc {
/// Execution context
pub struct Context {}
impl Context {
#[inline(always)]
pub unsafe fn new(priority: &rtic::export::Priority) -> Self {
Context {}
}
}
}
/// Implementation details
const APP: () = { # [ doc = r" Always include the device crate which contains the vector table" ] use lm3s6965 as _ ; # [ allow ( non_upper_case_globals ) ] static mut shared : u32 = 0 ; impl < 'a > rtic :: Mutex for resources :: shared < 'a > { type T = u32 ; # [ inline ( always ) ] fn lock < R > ( & mut self , f : impl FnOnce ( & mut u32 ) -> R ) -> R { # [ doc = r" Priority ceiling" ] const CEILING : u8 = 2u8 ; unsafe { rtic :: export :: lock ( & mut shared , self . priority ( ) , CEILING , lm3s6965 :: NVIC_PRIO_BITS , f ) } } } # [ allow ( non_upper_case_globals ) ] static mut shared2 : u32 = 0 ; impl < 'a > rtic :: Mutex for resources :: shared2 < 'a > { type T = u32 ; # [ inline ( always ) ] fn lock < R > ( & mut self , f : impl FnOnce ( & mut u32 ) -> R ) -> R { # [ doc = r" Priority ceiling" ] const CEILING : u8 = 2u8 ; unsafe { rtic :: export :: lock ( & mut shared2 , self . priority ( ) , CEILING , lm3s6965 :: NVIC_PRIO_BITS , f ) } } } # [ allow ( non_snake_case ) ] # [ no_mangle ] unsafe fn GPIOA ( ) { const PRIORITY : u8 = 1u8 ; rtic :: export :: run ( PRIORITY , | | { crate :: gpioa ( gpioa :: Context :: new ( & rtic :: export :: Priority :: new ( PRIORITY ) ) ) } ) ; } impl < 'a > gpioaResources < 'a > { # [ inline ( always ) ] unsafe fn new ( priority : & 'a rtic :: export :: Priority ) -> Self { gpioaResources { shared : resources :: shared :: new ( priority ) , shared2 : resources :: shared2 :: new ( priority ) , } } } # [ allow ( non_snake_case ) ] # [ no_mangle ] unsafe fn GPIOB ( ) { const PRIORITY : u8 = 2u8 ; rtic :: export :: run ( PRIORITY , | | { crate :: gpiob ( gpiob :: Context :: new ( & rtic :: export :: Priority :: new ( PRIORITY ) ) ) } ) ; } impl < 'a > gpiobResources < 'a > { # [ inline ( always ) ] unsafe fn new ( priority : & 'a rtic :: export :: Priority ) -> Self { gpiobResources { shared : & mut shared , shared2 : & mut shared2 , } } } # [ no_mangle ] unsafe extern "C" fn main ( ) -> ! { let _TODO : ( ) = ( ) ; rtic :: export :: interrupt :: disable ( ) ; let mut core : rtic :: export :: Peripherals = core :: mem :: transmute ( ( ) ) ; let _ = [ ( ) ; ( ( 1 << lm3s6965 :: NVIC_PRIO_BITS ) - 1u8 as usize ) ] ; core . NVIC . set_priority ( lm3s6965 :: Interrupt :: GPIOA , rtic :: export :: logical2hw ( 1u8 , lm3s6965 :: NVIC_PRIO_BITS ) ) ; rtic :: export :: NVIC :: unmask ( lm3s6965 :: Interrupt :: GPIOA ) ; let _ = [ ( ) ; ( ( 1 << lm3s6965 :: NVIC_PRIO_BITS ) - 2u8 as usize ) ] ; core . NVIC . set_priority ( lm3s6965 :: Interrupt :: GPIOB , rtic :: export :: logical2hw ( 2u8 , lm3s6965 :: NVIC_PRIO_BITS ) ) ; rtic :: export :: NVIC :: unmask ( lm3s6965 :: Interrupt :: GPIOB ) ; core . SCB . scr . modify ( | r | r | 1 << 1 ) ; let late = crate :: init ( init :: Context :: new ( core . into ( ) ) ) ; rtic :: export :: interrupt :: enable ( ) ; loop { rtic :: export :: wfi ( ) } } };
const APP: () = {
#[doc = r" Always include the device crate which contains the vector table"]
use lm3s6965 as _;
#[allow(non_upper_case_globals)]
static mut shared: u32 = 0;
impl<'a> rtic::Mutex for resources::shared<'a> {
type T = u32;
#[inline(always)]
fn lock<R>(&mut self, f: impl FnOnce(&mut u32) -> R) -> R {
#[doc = r" Priority ceiling"]
const CEILING: u8 = 2u8;
unsafe {
rtic::export::lock(
&mut shared,
self.priority(),
CEILING,
lm3s6965::NVIC_PRIO_BITS,
f,
)
}
}
}
#[allow(non_snake_case)]
#[no_mangle]
unsafe fn GPIOA() {
const PRIORITY: u8 = 1u8;
rtic::export::run(PRIORITY, || {
crate::gpioa(gpioa::Context::new(&rtic::export::Priority::new(PRIORITY)))
});
}
impl<'a> gpioaResources<'a> {
#[inline(always)]
unsafe fn new(priority: &'a rtic::export::Priority) -> Self {
gpioaResources {
shared: resources::shared::new(priority),
}
}
}
#[allow(non_snake_case)]
#[no_mangle]
unsafe fn GPIOB() {
const PRIORITY: u8 = 2u8;
rtic::export::run(PRIORITY, || {
crate::gpiob(gpiob::Context::new(&rtic::export::Priority::new(PRIORITY)))
});
}
impl<'a> gpiobResources<'a> {
#[inline(always)]
unsafe fn new(priority: &'a rtic::export::Priority) -> Self {
gpiobResources {
shared: &mut shared,
}
}
}
#[allow(non_snake_case)]
#[no_mangle]
unsafe fn GPIOC() {
const PRIORITY: u8 = 3u8;
rtic::export::run(PRIORITY, || {
crate::gpioc(gpioc::Context::new(&rtic::export::Priority::new(PRIORITY)))
});
}
#[no_mangle]
unsafe extern "C" fn main() -> ! {
let _TODO: () = ();
rtic::export::interrupt::disable();
let mut core: rtic::export::Peripherals = core::mem::transmute(());
let _ = [(); ((1 << lm3s6965::NVIC_PRIO_BITS) - 1u8 as usize)];
core.NVIC.set_priority(
lm3s6965::Interrupt::GPIOA,
rtic::export::logical2hw(1u8, lm3s6965::NVIC_PRIO_BITS),
);
rtic::export::NVIC::unmask(lm3s6965::Interrupt::GPIOA);
let _ = [(); ((1 << lm3s6965::NVIC_PRIO_BITS) - 2u8 as usize)];
core.NVIC.set_priority(
lm3s6965::Interrupt::GPIOB,
rtic::export::logical2hw(2u8, lm3s6965::NVIC_PRIO_BITS),
);
rtic::export::NVIC::unmask(lm3s6965::Interrupt::GPIOB);
let _ = [(); ((1 << lm3s6965::NVIC_PRIO_BITS) - 3u8 as usize)];
core.NVIC.set_priority(
lm3s6965::Interrupt::GPIOC,
rtic::export::logical2hw(3u8, lm3s6965::NVIC_PRIO_BITS),
);
rtic::export::NVIC::unmask(lm3s6965::Interrupt::GPIOC);
core.SCB.scr.modify(|r| r | 1 << 1);
let late = crate::init(init::Context::new(core.into()));
rtic::export::interrupt::enable();
loop {
rtic::export::wfi()
}
}
};

6
macros/src/codegen/resources.rs
View file

@ -103,12 +103,12 @@ pub fn codegen(
}
#[inline(always)]
pub unsafe fn is_locked(&self) -> bool {
pub unsafe fn get_locked(&self) -> bool {
self.locked.get()
}
pub unsafe fn lock(&self) {
self.locked.set(true);
pub unsafe fn set_locked(&self, b: bool) {
self.locked.set(b);
}
}
));

12
macros/src/codegen/util.rs
View file

@ -71,13 +71,17 @@ pub fn impl_mutex(
#cfg_core
impl<'a> rtic::Mutex for #path<'a> {
type T = #ty;
#[inline(always)]
fn lock<R>(&mut self, f: impl FnOnce(&mut #ty) -> R) -> R {
/// Priority ceiling
const CEILING: u8 = #ceiling;
unsafe {
if unsafe { self.get_locked() } {
panic!("Resource locked in sequential context");
};
unsafe { self.set_locked(true); }
let r = unsafe {
rtic::export::lock(
#ptr,
#priority,
@ -85,7 +89,9 @@ pub fn impl_mutex(
#device::NVIC_PRIO_BITS,
f,
)
}
};
unsafe { self.set_locked(false); }
r
}
}
)

1
src/export.rs
View file

@ -124,6 +124,7 @@ pub unsafe fn lock<T, R>(
nvic_prio_bits: u8,
f: impl FnOnce(&mut T) -> R,
) -> R {
let current = priority.get();
if current < ceiling {