NaxdyOrg/embassy
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macros: remove embassy_prefix attr.

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This was used in the past for reexporting the macros from drogue-device,
which is no longer using it.

Also, it is a pain to support, so we don't want it.
This commit is contained in:
Dario Nieuwenhuis 2022-08-17 15:03:12 +02:00
parent ef9e373ec4
commit bd0aaec624
4 changed files with 26 additions and 83 deletions
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57
embassy-macros/src/macros/main.rs
View file

@ -3,28 +3,16 @@ use proc_macro2::TokenStream;
use quote::quote;
use crate::util::ctxt::Ctxt;
use crate::util::path::ModulePrefix;
#[cfg(feature = "stm32")]
const HAL: Option<&str> = Some("embassy_stm32");
#[cfg(feature = "nrf")]
const HAL: Option<&str> = Some("embassy_nrf");
#[cfg(feature = "rp")]
const HAL: Option<&str> = Some("embassy_rp");
#[cfg(not(any(feature = "stm32", feature = "nrf", feature = "rp")))]
const HAL: Option<&str> = None;
#[derive(Debug, FromMeta)]
struct Args {
#[darling(default)]
embassy_prefix: ModulePrefix,
#[allow(unused)]
#[darling(default)]
config: Option<syn::LitStr>,
}
pub fn run(args: syn::AttributeArgs, f: syn::ItemFn) -> Result<TokenStream, TokenStream> {
#[allow(unused_variables)]
let args = Args::from_list(&args).map_err(|e| e.write_errors())?;
let fargs = f.sig.inputs.clone();
@ -38,26 +26,32 @@ pub fn run(args: syn::AttributeArgs, f: syn::ItemFn) -> Result<TokenStream, Toke
ctxt.error_spanned_by(&f.sig, "task functions must not be generic");
}
if HAL.is_some() && fargs.len() != 2 {
#[cfg(feature = "stm32")]
let hal = Some(quote!(::embassy_stm32));
#[cfg(feature = "nrf")]
let hal = Some(quote!(::embassy_nrf));
#[cfg(feature = "rp")]
let hal = Some(quote!(::embassy_rp));
#[cfg(not(any(feature = "stm32", feature = "nrf", feature = "rp")))]
let hal: Option<TokenStream> = None;
if hal.is_some() && fargs.len() != 2 {
ctxt.error_spanned_by(&f.sig, "main function must have 2 arguments");
}
if HAL.is_none() && fargs.len() != 1 {
if hal.is_none() && fargs.len() != 1 {
ctxt.error_spanned_by(&f.sig, "main function must have 1 argument");
}
ctxt.check()?;
let embassy_prefix = args.embassy_prefix;
let embassy_prefix_lit = embassy_prefix.literal();
let embassy_path = embassy_prefix.append("embassy_executor").path();
let f_body = f.block;
#[cfg(feature = "wasm")]
let main = quote! {
#[wasm_bindgen::prelude::wasm_bindgen(start)]
pub fn main() -> Result<(), wasm_bindgen::JsValue> {
static EXECUTOR: ::embassy_util::Forever<#embassy_path::executor::Executor> = ::embassy_util::Forever::new();
let executor = EXECUTOR.put(#embassy_path::executor::Executor::new());
static EXECUTOR: ::embassy_util::Forever<::embassy_executor::executor::Executor> = ::embassy_util::Forever::new();
let executor = EXECUTOR.put(::embassy_executor::executor::Executor::new());
executor.start(|spawner| {
spawner.spawn(__embassy_main(spawner)).unwrap();
@ -70,7 +64,7 @@ pub fn run(args: syn::AttributeArgs, f: syn::ItemFn) -> Result<TokenStream, Toke
#[cfg(all(feature = "std", not(feature = "wasm")))]
let main = quote! {
fn main() -> ! {
let mut executor = #embassy_path::executor::Executor::new();
let mut executor = ::embassy_executor::executor::Executor::new();
let executor = unsafe { __make_static(&mut executor) };
executor.run(|spawner| {
@ -87,16 +81,13 @@ pub fn run(args: syn::AttributeArgs, f: syn::ItemFn) -> Result<TokenStream, Toke
})
});
let (hal_setup, peris_arg) = match HAL {
Some(hal) => {
let embassy_hal_path = embassy_prefix.append(hal).path();
(
quote!(
let p = #embassy_hal_path::init(#config);
),
quote!(p),
)
}
let (hal_setup, peris_arg) = match hal {
Some(hal) => (
quote!(
let p = #hal::init(#config);
),
quote!(p),
),
None => (quote!(), quote!()),
};
@ -105,7 +96,7 @@ pub fn run(args: syn::AttributeArgs, f: syn::ItemFn) -> Result<TokenStream, Toke
fn main() -> ! {
#hal_setup
let mut executor = #embassy_path::executor::Executor::new();
let mut executor = ::embassy_executor::executor::Executor::new();
let executor = unsafe { __make_static(&mut executor) };
executor.run(|spawner| {
@ -116,7 +107,7 @@ pub fn run(args: syn::AttributeArgs, f: syn::ItemFn) -> Result<TokenStream, Toke
};
let result = quote! {
#[#embassy_path::task(embassy_prefix = #embassy_prefix_lit)]
#[::embassy_executor::task()]
async fn __embassy_main(#fargs) {
#f_body
}

10
embassy-macros/src/macros/task.rs
View file

@ -3,22 +3,16 @@ use proc_macro2::TokenStream;
use quote::{format_ident, quote};
use crate::util::ctxt::Ctxt;
use crate::util::path::ModulePrefix;
#[derive(Debug, FromMeta)]
struct Args {
#[darling(default)]
pool_size: Option<usize>,
#[darling(default)]
embassy_prefix: ModulePrefix,
}
pub fn run(args: syn::AttributeArgs, f: syn::ItemFn) -> Result<TokenStream, TokenStream> {
let args = Args::from_list(&args).map_err(|e| e.write_errors())?;
let embassy_prefix = args.embassy_prefix.append("embassy_executor");
let embassy_path = embassy_prefix.path();
let pool_size: usize = args.pool_size.unwrap_or(1);
let ctxt = Ctxt::new();
@ -70,9 +64,9 @@ pub fn run(args: syn::AttributeArgs, f: syn::ItemFn) -> Result<TokenStream, Toke
// in the user's code.
#task_inner
#visibility fn #task_ident(#fargs) -> #embassy_path::executor::SpawnToken<impl Sized> {
#visibility fn #task_ident(#fargs) -> ::embassy_executor::executor::SpawnToken<impl Sized> {
type Fut = impl ::core::future::Future + 'static;
static POOL: #embassy_path::executor::raw::TaskPool<Fut, #pool_size> = #embassy_path::executor::raw::TaskPool::new();
static POOL: ::embassy_executor::executor::raw::TaskPool<Fut, #pool_size> = ::embassy_executor::executor::raw::TaskPool::new();
unsafe { POOL._spawn_async_fn(move || #task_inner_ident(#(#arg_names,)*)) }
}
};

1
embassy-macros/src/util/mod.rs
View file

@ -1,2 +1 @@
pub mod ctxt;
pub mod path;

41
embassy-macros/src/util/path.rs
View file

@ -1,41 +0,0 @@
use darling::{FromMeta, Result};
use proc_macro2::Span;
use syn::{LitStr, Path};
#[derive(Debug)]
pub struct ModulePrefix {
literal: LitStr,
}
impl ModulePrefix {
pub fn new(path: &str) -> Self {
let literal = LitStr::new(path, Span::call_site());
Self { literal }
}
pub fn append(&self, component: &str) -> ModulePrefix {
let mut lit = self.literal().value();
lit.push_str(component);
Self::new(lit.as_str())
}
pub fn path(&self) -> Path {
self.literal.parse().unwrap()
}
pub fn literal(&self) -> &LitStr {
&self.literal
}
}
impl FromMeta for ModulePrefix {
fn from_string(value: &str) -> Result<Self> {
Ok(ModulePrefix::new(value))
}
}
impl Default for ModulePrefix {
fn default() -> ModulePrefix {
ModulePrefix::new("::")
}
}