95 lines
2.5 KiB
Rust
95 lines
2.5 KiB
Rust
#[macro_export]
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macro_rules! peripherals {
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($($(#[$cfg:meta])? $name:ident),*$(,)?) => {
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pub mod peripherals {
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$(
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$(#[$cfg])?
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#[allow(non_camel_case_types)]
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pub struct $name { _private: () }
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$(#[$cfg])?
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impl $name {
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/// Unsafely create an instance of this peripheral out of thin air.
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///
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/// # Safety
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///
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/// You must ensure that you're only using one instance of this type at a time.
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#[inline]
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pub unsafe fn steal() -> Self {
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Self{ _private: ()}
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}
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}
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$(#[$cfg])?
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$crate::impl_unborrow!($name);
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)*
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}
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#[allow(non_snake_case)]
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pub struct Peripherals {
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$(
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$(#[$cfg])?
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pub $name: peripherals::$name,
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)*
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}
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impl Peripherals {
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///Returns all the peripherals *once*
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#[inline]
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pub(crate) fn take() -> Self {
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#[no_mangle]
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static mut _EMBASSY_DEVICE_PERIPHERALS: bool = false;
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critical_section::with(|_| unsafe {
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if _EMBASSY_DEVICE_PERIPHERALS {
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panic!("init called more than once!")
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}
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_EMBASSY_DEVICE_PERIPHERALS = true;
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Self::steal()
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})
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}
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}
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impl Peripherals {
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/// Unsafely create an instance of this peripheral out of thin air.
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///
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/// # Safety
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///
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/// You must ensure that you're only using one instance of this type at a time.
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#[inline]
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pub unsafe fn steal() -> Self {
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Self {
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$(
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$(#[$cfg])?
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$name: peripherals::$name::steal(),
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)*
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}
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}
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}
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};
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}
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#[macro_export]
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macro_rules! unborrow {
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($($name:ident),*) => {
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$(
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let mut $name = $name.unborrow();
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)*
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}
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}
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#[macro_export]
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macro_rules! impl_unborrow {
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($type:ident) => {
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impl $crate::Unborrow for $type {
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type Target = $type;
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#[inline]
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unsafe fn unborrow_unchecked(&mut self) -> Self::Target {
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$type { ..*self }
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}
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}
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};
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}
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