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Add functions with multiple arguments to import macro, add test cases

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This commit is contained in:
Isaac Clayton 2022-06-13 10:24:33 +02:00
parent 28f071e50d
commit f110945fd6
3 changed files with 100 additions and 69 deletions
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121
crates/plugin_macros/src/lib.rs
View File

@ -2,7 +2,9 @@ use core::panic;
use proc_macro::TokenStream;
use quote::{format_ident, quote};
use syn::{parse_macro_input, FnArg, ForeignItemFn, ItemFn, Type, Visibility};
use syn::{
parse_macro_input, Block, FnArg, ForeignItemFn, Ident, ItemFn, Pat, PatIdent, Type, Visibility,
};
#[proc_macro_attribute]
pub fn export(args: TokenStream, function: TokenStream) -> TokenStream {
@ -32,7 +34,7 @@ pub fn export(args: TokenStream, function: TokenStream) -> TokenStream {
.iter()
.map(|x| match x {
FnArg::Receiver(_) => {
panic!("all arguments must have specified types, no `self` allowed")
panic!("All arguments must have specified types, no `self` allowed")
}
FnArg::Typed(item) => *item.ty.clone(),
})
@ -91,70 +93,69 @@ pub fn import(args: TokenStream, function: TokenStream) -> TokenStream {
panic!("Exported functions can not take generic parameters");
}
dbg!(&fn_declare.sig);
// let inner_fn_name = format_ident!("{}", fn_declare.sig.ident);
let extern_fn_name = format_ident!("__{}", fn_declare.sig.ident);
// let inner_fn = ItemFn {
// attrs: fn_declare.attrs,
// vis: fn_declare.vis,
// sig: fn_declare.sig,
// block: todo!(),
// };
let (args, tys): (Vec<Ident>, Vec<Type>) = fn_declare
.sig
.inputs
.clone()
.into_iter()
.map(|x| match x {
FnArg::Receiver(_) => {
panic!("All arguments must have specified types, no `self` allowed")
}
FnArg::Typed(t) => {
if let Pat::Ident(i) = *t.pat {
(i.ident, *t.ty)
} else {
panic!("All function arguments must be identifiers");
}
}
})
.unzip();
let outer_fn_name = format_ident!("{}", fn_declare.sig.ident);
let inner_fn_name = format_ident!("__{}", outer_fn_name);
dbg!("hello");
// let variadic = inner_fn.sig.inputs.len();
// let i = (0..variadic).map(syn::Index::from);
// let t: Vec<Type> = inner_fn
// .sig
// .inputs
// .iter()
// .map(|x| match x {
// FnArg::Receiver(_) => {
// panic!("all arguments must have specified types, no `self` allowed")
// }
// FnArg::Typed(item) => *item.ty.clone(),
// })
// .collect();
let body = TokenStream::from(quote! {
{
// dbg!("executing imported function");
// setup
let data: (#( #tys ),*) = (#( #args ),*);
let data = ::plugin::bincode::serialize(&data).unwrap();
let buffer = unsafe { ::plugin::__Buffer::from_vec(data) };
// // this is cursed...
// let (args, ty) = if variadic != 1 {
// (
// quote! {
// #( data.#i ),*
// },
// quote! {
// ( #( #t ),* )
// },
// )
// } else {
// let ty = &t[0];
// (quote! { data }, quote! { #ty })
// };
// operation
let new_buffer = unsafe { #extern_fn_name(buffer.into_u64()) };
let new_data = unsafe { ::plugin::__Buffer::from_u64(new_buffer).to_vec() };
// TokenStream::from(quote! {
// extern "C" {
// fn #inner_fn_name(buffer: u64) -> u64;
// }
// teardown
match ::plugin::bincode::deserialize(&new_data) {
Ok(d) => d,
Err(e) => panic!("Data returned from function not deserializable."),
}
}
});
// #[no_mangle]
// fn #outer_fn_name #args /* (string: &str) */ -> #return_type /* Option<Vec<u8>> */ {
// dbg!("executing command: {}", string);
// // setup
// let data = #args_collect;
// let data = ::plugin::bincode::serialize(&data).unwrap();
// let buffer = unsafe { ::plugin::__Buffer::from_vec(data) };
dbg!("hello2");
// // operation
// let new_buffer = unsafe { #inner_fn_name(buffer.into_u64()) };
// let new_data = unsafe { ::plugin::__Buffer::from_u64(new_buffer).to_vec() };
let block = parse_macro_input!(body as Block);
// // teardown
// match ::plugin::bincode::deserialize(&new_data) {
// Ok(d) => d,
// Err(e) => panic!("Data returned from function not deserializable."),
// }
// }
// })
todo!()
dbg!("hello {:?}", &block);
let inner_fn = ItemFn {
attrs: fn_declare.attrs,
vis: fn_declare.vis,
sig: fn_declare.sig,
block: Box::new(block),
};
TokenStream::from(quote! {
extern "C" {
fn #extern_fn_name(buffer: u64) -> u64;
}
#[no_mangle]
#inner_fn
})
}

17
crates/plugin_runtime/src/lib.rs
View File

@ -16,7 +16,8 @@ mod tests {
swap: WasiFn<(u32, u32), (u32, u32)>,
sort: WasiFn<Vec<u32>, Vec<u32>>,
print: WasiFn<String, ()>,
// and_back: WasiFn<u32, u32>,
and_back: WasiFn<u32, u32>,
imports: WasiFn<u32, u32>,
}
async {
@ -24,6 +25,12 @@ mod tests {
.unwrap()
.host_function("mystery_number", |input: u32| input + 7)
.unwrap()
.host_function("import_noop", |_: ()| ())
.unwrap()
.host_function("import_identity", |input: u32| input)
.unwrap()
.host_function("import_swap", |(a, b): (u32, u32)| (b, a))
.unwrap()
.init(include_bytes!("../../../plugins/bin/test_plugin.wasm"))
.await
.unwrap();
@ -36,7 +43,8 @@ mod tests {
swap: runtime.function("swap").unwrap(),
sort: runtime.function("sort").unwrap(),
print: runtime.function("print").unwrap(),
// and_back: runtime.function("and_back").unwrap(),
and_back: runtime.function("and_back").unwrap(),
imports: runtime.function("imports").unwrap(),
};
let unsorted = vec![1, 3, 4, 2, 5];
@ -49,7 +57,10 @@ mod tests {
assert_eq!(runtime.call(&plugin.swap, (1, 2)).await.unwrap(), (2, 1));
assert_eq!(runtime.call(&plugin.sort, unsorted).await.unwrap(), sorted);
assert_eq!(runtime.call(&plugin.print, "Hi!".into()).await.unwrap(), ());
// assert_eq!(runtime.call(&plugin.and_back, 1).await.unwrap(), 8);
assert_eq!(runtime.call(&plugin.and_back, 1).await.unwrap(), 8);
assert_eq!(runtime.call(&plugin.imports, 1).await.unwrap(), 8);
// dbg!("{}", runtime.call(&plugin.and_back, 1).await.unwrap());
}
.block_on()
}

31
plugins/test_plugin/src/lib.rs
View File

@ -35,10 +35,29 @@ pub fn print(string: String) {
eprintln!("to stderr: {}", string);
}
// #[import]
// fn mystery_number(input: u32) -> u32;
#[import]
fn mystery_number(input: u32) -> u32;
// #[export]
// pub fn and_back(secret: u32) -> u32 {
// mystery_number(secret)
// }
#[export]
pub fn and_back(secret: u32) -> u32 {
mystery_number(secret)
}
#[import]
fn import_noop() -> ();
#[import]
fn import_identity(i: u32) -> u32;
#[import]
fn import_swap(a: u32, b: u32) -> (u32, u32);
#[export]
pub fn imports(x: u32) -> u32 {
let a = import_identity(7);
import_noop();
let (b, c) = import_swap(a, x);
assert_eq!(a, c);
assert_eq!(x, b);
a + b // should be 7 + x
}