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Extend the task macro to allow cfging arguments away

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This commit is contained in:
Scott Mabin 2023-12-31 14:14:32 +00:00
parent 430696802e
commit 93b64b90ce
1 changed files with 15 additions and 4 deletions
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19
embassy-executor-macros/src/macros/task.rs
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@ -49,7 +49,7 @@ pub fn run(args: &[NestedMeta], f: syn::ItemFn) -> Result<TokenStream, TokenStre
}, },
} }
let mut arg_names = Vec::new(); let mut args = Vec::new();
let mut fargs = f.sig.inputs.clone(); let mut fargs = f.sig.inputs.clone();
for arg in fargs.iter_mut() { for arg in fargs.iter_mut() {
@ -59,8 +59,8 @@ pub fn run(args: &[NestedMeta], f: syn::ItemFn) -> Result<TokenStream, TokenStre
} }
syn::FnArg::Typed(t) => match t.pat.as_mut() { syn::FnArg::Typed(t) => match t.pat.as_mut() {
syn::Pat::Ident(id) => { syn::Pat::Ident(id) => {
arg_names.push(id.ident.clone());
id.mutability = None; id.mutability = None;
args.push((id.clone(), t.attrs.clone()));
} }
_ => { _ => {
ctxt.error_spanned_by(arg, "pattern matching in task arguments is not yet supported"); ctxt.error_spanned_by(arg, "pattern matching in task arguments is not yet supported");
@ -79,13 +79,24 @@ pub fn run(args: &[NestedMeta], f: syn::ItemFn) -> Result<TokenStream, TokenStre
task_inner.vis = syn::Visibility::Inherited; task_inner.vis = syn::Visibility::Inherited;
task_inner.sig.ident = task_inner_ident.clone(); task_inner.sig.ident = task_inner_ident.clone();
// assemble the original input arguments,
// including any attributes that may have
// been applied previously
let mut full_args = Vec::new();
for (arg, cfgs) in args {
full_args.push(quote!(
#(#cfgs)*
#arg
));
}
#[cfg(feature = "nightly")] #[cfg(feature = "nightly")]
let mut task_outer: ItemFn = parse_quote! { let mut task_outer: ItemFn = parse_quote! {
#visibility fn #task_ident(#fargs) -> ::embassy_executor::SpawnToken<impl Sized> { #visibility fn #task_ident(#fargs) -> ::embassy_executor::SpawnToken<impl Sized> {
type Fut = impl ::core::future::Future + 'static; type Fut = impl ::core::future::Future + 'static;
const POOL_SIZE: usize = #pool_size; const POOL_SIZE: usize = #pool_size;
static POOL: ::embassy_executor::raw::TaskPool<Fut, POOL_SIZE> = ::embassy_executor::raw::TaskPool::new(); static POOL: ::embassy_executor::raw::TaskPool<Fut, POOL_SIZE> = ::embassy_executor::raw::TaskPool::new();
unsafe { POOL._spawn_async_fn(move || #task_inner_ident(#(#arg_names,)*)) } unsafe { POOL._spawn_async_fn(move || #task_inner_ident(#(#full_args,)*)) }
} }
}; };
#[cfg(not(feature = "nightly"))] #[cfg(not(feature = "nightly"))]
@ -93,7 +104,7 @@ pub fn run(args: &[NestedMeta], f: syn::ItemFn) -> Result<TokenStream, TokenStre
#visibility fn #task_ident(#fargs) -> ::embassy_executor::SpawnToken<impl Sized> { #visibility fn #task_ident(#fargs) -> ::embassy_executor::SpawnToken<impl Sized> {
const POOL_SIZE: usize = #pool_size; const POOL_SIZE: usize = #pool_size;
static POOL: ::embassy_executor::_export::TaskPoolRef = ::embassy_executor::_export::TaskPoolRef::new(); static POOL: ::embassy_executor::_export::TaskPoolRef = ::embassy_executor::_export::TaskPoolRef::new();
unsafe { POOL.get::<_, POOL_SIZE>()._spawn_async_fn(move || #task_inner_ident(#(#arg_names,)*)) } unsafe { POOL.get::<_, POOL_SIZE>()._spawn_async_fn(move || #task_inner_ident(#(#full_args,)*)) }
} }
}; };