rtic/expand_lock.rs

#![feature(prelude_import)]
//! examples/lock.rs
#![deny(unsafe_code)]
#![deny(warnings)]
#![no_main]
#![no_std]
#[prelude_import]
use core::prelude::v1::*;
#[macro_use]
extern crate core;
#[macro_use]
extern crate compiler_builtins;
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);
}
#[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
pub mod init {
    /// Execution context
    pub struct Context {
        /// Core (Cortex-M) peripherals
        pub core: rtic::export::Peripherals,
    }
    impl Context {
        #[inline(always)]
        pub unsafe fn new(core: rtic::export::Peripherals) -> Self {
            Context { core }
        }
    }
}
mod resources {
    use core::cell::Cell;
    use rtic::export::Priority;
    #[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,
                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)]
///Resources `gpioa` has access to
pub struct gpioaResources<'a> {
    pub shared: resources::shared<'a>,
}
#[allow(non_snake_case)]
///Hardware task
pub mod gpioa {
    #[doc(inline)]
    pub use super::gpioaResources as Resources;
    /// Execution context
    pub struct Context<'a> {
        /// Resources this task has access to
        pub resources: Resources<'a>,
    }
    impl<'a> Context<'a> {
        #[inline(always)]
        pub unsafe fn new(priority: &'a rtic::export::Priority) -> Self {
            Context {
                resources: Resources::new(priority),
            }
        }
    }
}
#[allow(non_snake_case)]
///Resources `gpiob` has access to
pub struct gpiobResources<'a> {
    pub shared: &'a mut u32,
}
#[allow(non_snake_case)]
///Hardware task
pub mod gpiob {
    #[doc(inline)]
    pub use super::gpiobResources as Resources;
    /// Execution context
    pub struct Context<'a> {
        /// Resources this task has access to
        pub resources: Resources<'a>,
    }
    impl<'a> Context<'a> {
        #[inline(always)]
        pub unsafe fn new(priority: &'a rtic::export::Priority) -> Self {
            Context {
                resources: Resources::new(priority),
            }
        }
    }
}
#[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>(&self, f: impl FnOnce(&mut u32) -> R) -> R {
            #[doc = r" Priority ceiling"]
            const CEILING: u8 = 2u8;
            if unsafe { self.get_locked() } {
                ::core::panicking::panic("Resource locked in sequential context");
            };
            unsafe {
                self.set_locked(true);
            }
            let r = unsafe {
                rtic::export::lock(
                    &mut shared,
                    self.priority(),
                    CEILING,
                    lm3s6965::NVIC_PRIO_BITS,
                    f,
                )
            };
            unsafe {
                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()
        }
    }
};