diff options
Diffstat (limited to 'cuda_base/src/lib.rs')
| -rw-r--r-- | cuda_base/src/lib.rs | 631 |
1 files changed, 90 insertions, 541 deletions
diff --git a/cuda_base/src/lib.rs b/cuda_base/src/lib.rs index 79484fb..64e33ef 100644 --- a/cuda_base/src/lib.rs +++ b/cuda_base/src/lib.rs @@ -1,165 +1,24 @@ extern crate proc_macro; -use std::collections::hash_map; -use std::iter; - use proc_macro::TokenStream; -use proc_macro2::Span; -use quote::{format_ident, quote, ToTokens}; -use rustc_hash::{FxHashMap, FxHashSet}; +use quote::{quote, ToTokens}; +use rustc_hash::FxHashMap; +use std::iter; use syn::parse::{Parse, ParseStream}; use syn::punctuated::Punctuated; use syn::visit_mut::VisitMut; use syn::{ - bracketed, parse_macro_input, parse_quote, Abi, Fields, File, FnArg, ForeignItem, - ForeignItemFn, Ident, Item, ItemConst, ItemForeignMod, LitStr, PatType, Path, PathArguments, - PathSegment, ReturnType, Signature, Token, Type, TypeArray, TypePath, TypePtr, UseTree, + bracketed, parse_macro_input, File, ForeignItem, ForeignItemFn, Ident, Item, Path, Signature, + Token, }; const CUDA_RS: &'static str = include_str! {"cuda.rs"}; -// This macro copies cuda.rs as-is with some changes: -// * All function declarations are filtered out -// * CUdeviceptr_v2 is redefined from `unsigned long long` to `*void` -// * `extern "C"` gets replaced by `extern "system"` -// * CUuuid_st is redefined to use uchar instead of char -#[proc_macro] -pub fn cuda_type_declarations(_: TokenStream) -> TokenStream { - let mut cuda_module = syn::parse_str::<File>(CUDA_RS).unwrap(); - let mut curesult_constants = Vec::new(); - cuda_module.items = cuda_module - .items - .into_iter() - .filter_map(|item| match item { - Item::ForeignMod(_) => None, - Item::Struct(mut struct_) => { - let ident_string = struct_.ident.to_string(); - match &*ident_string { - "CUdeviceptr_v2" => match &mut struct_.fields { - Fields::Unnamed(ref mut fields) => { - fields.unnamed[0].ty = - absolute_path_to_mut_ptr(&["std", "os", "raw", "c_void"]) - } - _ => unreachable!(), - }, - "CUuuid_st" => match &mut struct_.fields { - Fields::Named(ref mut fields) => match fields.named[0].ty { - Type::Array(TypeArray { ref mut elem, .. }) => { - *elem = Box::new(Type::Path(TypePath { - qself: None, - path: segments_to_path(&["std", "os", "raw", "c_uchar"]), - })) - } - _ => unreachable!(), - }, - _ => panic!(), - }, - _ => {} - } - Some(Item::Struct(struct_)) - } - Item::Const(const_) => { - let name = const_.ident.to_string(); - if name.starts_with("cudaError_enum_CUDA_") { - curesult_constants.push(const_); - } - None - } - Item::Use(use_) => { - if let UseTree::Path(ref path) = use_.tree { - if let UseTree::Rename(ref rename) = &*path.tree { - if rename.rename == "CUresult" { - return None; - } - } - } - Some(Item::Use(use_)) - } - i => Some(i), - }) - .collect::<Vec<_>>(); - append_curesult(curesult_constants, &mut cuda_module.items); - syn::visit_mut::visit_file_mut(&mut FixAbi, &mut cuda_module); - cuda_module.into_token_stream().into() -} - -fn append_curesult(curesult_constants: Vec<syn::ItemConst>, items: &mut Vec<Item>) { - let curesult_constants = curesult_constants.iter().map(|const_| { - let ident = const_.ident.to_string(); - let expr = &const_.expr; - if ident.ends_with("CUDA_SUCCESS") { - quote! { - const SUCCESS: CUresult = CUresult::Ok(()); - } - } else { - let prefix = "cudaError_enum_CUDA_"; - let ident = format_ident!("{}", ident[prefix.len()..]); - quote! { - const #ident: CUresult = CUresult::Err(unsafe { ::core::num::NonZeroU32::new_unchecked(#expr) }); - } - } - }); - items.push(parse_quote! { - pub trait CUresultConsts { - #(#curesult_constants)* - } - }); - items.push(parse_quote! { - impl CUresultConsts for CUresult {} - }); - items.push(parse_quote! { - #[must_use] - pub type CUresult = ::core::result::Result<(), ::core::num::NonZeroU32>; - }); - items.push(parse_quote! { - const _: fn() = || { - let _ = std::mem::transmute::<CUresult, u32>; - }; - }); -} - -fn segments_to_path(path: &[&'static str]) -> Path { - let mut segments = Punctuated::new(); - for ident in path { - let ident = PathSegment { - ident: Ident::new(ident, Span::call_site()), - arguments: PathArguments::None, - }; - segments.push(ident); - } - Path { - leading_colon: Some(Token)), - segments, - } -} - -fn absolute_path_to_mut_ptr(path: &[&'static str]) -> Type { - Type::Ptr(TypePtr { - star_token: Token), - const_token: None, - mutability: Some(Token)), - elem: Box::new(Type::Path(TypePath { - qself: None, - path: segments_to_path(path), - })), - }) -} - -struct FixAbi; - -impl VisitMut for FixAbi { - fn visit_abi_mut(&mut self, i: &mut Abi) { - if let Some(ref mut name) = i.name { - *name = LitStr::new("system", Span::call_site()); - } - } -} - // This macro accepts following arguments: -// * `type_path`: path to the module with type definitions (in the module tree) // * `normal_macro`: ident for a normal macro -// * `override_macro`: ident for an override macro -// * `override_fns`: list of override functions +// * zero or more: +// * `override_macro`: ident for an override macro +// * `override_fns`: list of override functions // Then macro goes through every function in rust.rs, and for every fn `foo`: // * if `foo` is contained in `override_fns` then pass it into `override_macro` // * if `foo` is not contained in `override_fns` pass it to `normal_macro` @@ -172,430 +31,120 @@ impl VisitMut for FixAbi { #[proc_macro] pub fn cuda_function_declarations(tokens: TokenStream) -> TokenStream { let input = parse_macro_input!(tokens as FnDeclInput); - let cuda_module = syn::parse_str::<File>(CUDA_RS).unwrap(); - let override_fns = input - .override_fns - .iter() - .map(ToString::to_string) - .collect::<FxHashSet<_>>(); - let (normal_macro_args, override_macro_args): (Vec<_>, Vec<_>) = cuda_module - .items - .into_iter() - .filter_map(|item| match item { - Item::ForeignMod(ItemForeignMod { mut items, .. }) => match items.pop().unwrap() { - ForeignItem::Fn(ForeignItemFn { - sig: - Signature { - ident, - inputs, - output, - .. - }, - .. - }) => { - let use_normal_macro = !override_fns.contains(&ident.to_string()); - let inputs = inputs - .into_iter() - .map(|fn_arg| match fn_arg { - FnArg::Typed(mut pat_type) => { - pat_type.ty = - prepend_cuda_path_to_type(&input.type_path, pat_type.ty); - FnArg::Typed(pat_type) - } - _ => unreachable!(), - }) - .collect::<Punctuated<_, Token![,]>>(); - let output = match output { - ReturnType::Type(_, type_) => type_, - ReturnType::Default => unreachable!(), - }; - let type_path = input.type_path.clone(); - Some(( - quote! { - "system" fn #ident(#inputs) -> #type_path :: #output - }, - use_normal_macro, - )) - } - _ => unreachable!(), - }, - _ => None, - }) - .partition(|(_, use_normal_macro)| *use_normal_macro); - let mut result = proc_macro2::TokenStream::new(); - if !normal_macro_args.is_empty() { - let punctuated_normal_macro_args = to_punctuated::<Token![;]>(normal_macro_args); - let macro_ = &input.normal_macro; - result.extend(iter::once(quote! { - #macro_ ! (#punctuated_normal_macro_args); - })); - } - if !override_macro_args.is_empty() { - let punctuated_override_macro_args = to_punctuated::<Token![;]>(override_macro_args); - let macro_ = &input.override_macro; - result.extend(iter::once(quote! { - #macro_ ! (#punctuated_override_macro_args); - })); - } - result.into() -} - -fn to_punctuated<P: ToTokens + Default>( - elms: Vec<(proc_macro2::TokenStream, bool)>, -) -> proc_macro2::TokenStream { - let mut collection = Punctuated::<proc_macro2::TokenStream, P>::new(); - collection.extend(elms.into_iter().map(|(token_stream, _)| token_stream)); - collection.into_token_stream() -} - -fn prepend_cuda_path_to_type(base_path: &Path, type_: Box<Type>) -> Box<Type> { - match *type_ { - Type::Path(mut type_path) => { - type_path.path = prepend_cuda_path_to_path(base_path, type_path.path); - Box::new(Type::Path(type_path)) - } - Type::Ptr(mut type_ptr) => { - type_ptr.elem = prepend_cuda_path_to_type(base_path, type_ptr.elem); - Box::new(Type::Ptr(type_ptr)) + let mut choose_macro = ChooseMacro::new(input); + let mut cuda_module = syn::parse_str::<File>(CUDA_RS).unwrap(); + syn::visit_mut::visit_file_mut(&mut FixFnSignatures, &mut cuda_module); + let extern_ = if let Item::ForeignMod(extern_) = cuda_module.items.pop().unwrap() { + extern_ + } else { + unreachable!() + }; + let abi = extern_.abi.name; + for mut item in extern_.items { + if let ForeignItem::Fn(ForeignItemFn { + sig: Signature { ref ident, .. }, + ref mut attrs, + .. + }) = item + { + *attrs = Vec::new(); + choose_macro.add(ident, quote! { #abi #item }); + } else { + unreachable!() } - _ => unreachable!(), - } -} - -fn prepend_cuda_path_to_path(base_path: &Path, path: Path) -> Path { - if path.leading_colon.is_some() { - return path; } - if path.segments.len() == 1 { - let ident = path.segments[0].ident.to_string(); - if ident.starts_with("CU") - || ident.starts_with("cu") - || ident.starts_with("GL") - || ident.starts_with("EGL") - || ident.starts_with("Vdp") - || ident == "HGPUNV" - { - let mut base_path = base_path.clone(); - base_path.segments.extend(path.segments); - return base_path; + let mut result = proc_macro2::TokenStream::new(); + for (path, items) in + iter::once(choose_macro.default).chain(choose_macro.override_sets.into_iter()) + { + if items.is_empty() { + continue; + } + quote! { + #path ! { #(#items)* } } + .to_tokens(&mut result); } - path + result.into() } - struct FnDeclInput { - type_path: Path, normal_macro: Path, - override_macro: Path, - override_fns: Punctuated<Ident, Token![,]>, + overrides: Punctuated<OverrideMacro, Token![,]>, } impl Parse for FnDeclInput { fn parse(input: ParseStream) -> syn::Result<Self> { - let type_path = input.parse::<Path>()?; - input.parse::<Token![,]>()?; let normal_macro = input.parse::<Path>()?; - input.parse::<Token![,]>()?; - let override_macro = input.parse::<Path>()?; - input.parse::<Token![,]>()?; - let override_fns_content; - bracketed!(override_fns_content in input); - let override_fns = override_fns_content.parse_terminated(Ident::parse, Token![,])?; + let overrides = if input.is_empty() { + Punctuated::new() + } else { + input.parse::<Token![,]>()?; + input.parse_terminated(OverrideMacro::parse, Token![,])? + }; Ok(Self { - type_path, normal_macro, - override_macro, - override_fns, + overrides, }) } } - -// This trait accepts following parameters: -// * `type_path`: path to the module with type definitions (in the module tree) -// * `trait_`: name of the trait to be derived -// * `ignore_types`: bracketed list of types to ignore -// * `ignore_fns`: bracketed list of fns to ignore -#[proc_macro] -pub fn cuda_derive_display_trait(tokens: TokenStream) -> TokenStream { - let input = parse_macro_input!(tokens as DeriveDisplayInput); - let cuda_module = syn::parse_str::<File>(CUDA_RS).unwrap(); - let mut derive_state = DeriveDisplayState::new(input); - let mut main_body: proc_macro2::TokenStream = cuda_module - .items - .into_iter() - .filter_map(|i| cuda_derive_display_trait_for_item(&mut derive_state, i)) - .collect::<proc_macro2::TokenStream>(); - main_body.extend(curesult_display_trait(&derive_state)); - main_body.into() -} - -fn curesult_display_trait(derive_state: &DeriveDisplayState) -> proc_macro2::TokenStream { - let path_prefix = &derive_state.type_path; - let trait_ = &derive_state.trait_; - let errors = derive_state.result_variants.iter().filter_map(|const_| { - let prefix = "cudaError_enum_"; - let text = &const_.ident.to_string()[prefix.len()..]; - if text == "CUDA_SUCCESS" { - return None; - } - let expr = &const_.expr; - Some(quote! { - #expr => writer.write_all(#text.as_bytes()), - }) - }); - quote! { - impl #trait_ for #path_prefix :: CUresult { - fn write(&self, _fn_name: &'static str, _index: usize, writer: &mut (impl std::io::Write + ?Sized)) -> std::io::Result<()> { - match self { - Ok(()) => writer.write_all(b"CUDA_SUCCESS"), - Err(err) => { - match err.get() { - #(#errors)* - err => write!(writer, "{}", err) - } - } - } - } - } - } +struct OverrideMacro { + macro_: Path, + functions: Punctuated<Ident, Token![,]>, } -fn cuda_derive_display_trait_for_item( - state: &mut DeriveDisplayState, - item: Item, -) -> Option<proc_macro2::TokenStream> { - let path_prefix = &state.type_path; - let path_prefix_iter = iter::repeat(&path_prefix); - let trait_ = &state.trait_; - let trait_iter = iter::repeat(&state.trait_); - match item { - Item::Const(const_) => { - if const_.ty.to_token_stream().to_string() == "cudaError_enum" { - state.result_variants.push(const_); - } - None - } - Item::ForeignMod(ItemForeignMod { mut items, .. }) => match items.pop().unwrap() { - ForeignItem::Fn(ForeignItemFn { - sig: Signature { ident, inputs, .. }, - .. - }) => { - if state.ignore_fns.contains(&ident) { - return None; - } - let inputs = inputs - .into_iter() - .map(|fn_arg| match fn_arg { - FnArg::Typed(mut pat_type) => { - pat_type.ty = prepend_cuda_path_to_type(path_prefix, pat_type.ty); - FnArg::Typed(pat_type) - } - _ => unreachable!(), - }) - .collect::<Vec<_>>(); - let inputs_iter = inputs.iter(); - let mut arg_name_iter = inputs.iter().map(|fn_arg| match fn_arg { - FnArg::Typed(PatType { pat, .. }) => pat, - _ => unreachable!(), - }); - let fn_name = format_ident!("write_{}", ident); - let original_fn_name = ident.to_string(); - Some(match arg_name_iter.next() { - Some(first_arg_name) => quote! { - pub fn #fn_name(writer: &mut (impl std::io::Write + ?Sized), #(#inputs_iter,)*) -> std::io::Result<()> { - writer.write_all(concat!("(", stringify!(#first_arg_name), ": ").as_bytes())?; - let mut arg_idx = 0usize; - CudaDisplay::write(&#first_arg_name, #original_fn_name, arg_idx, writer)?; - #( - writer.write_all(b", ")?; - writer.write_all(concat!(stringify!(#arg_name_iter), ": ").as_bytes())?; - CudaDisplay::write(&#arg_name_iter, #original_fn_name, arg_idx, writer)?; - arg_idx += 1; - )* - writer.write_all(b")") - } - }, - None => quote! { - pub fn #fn_name(writer: &mut (impl std::io::Write + ?Sized)) -> std::io::Result<()> { - writer.write_all(b"()") - } - }, - }) - } - _ => unreachable!(), - }, - Item::Impl(mut item_impl) => { - let enum_ = match *(item_impl.self_ty) { - Type::Path(mut path) => path.path.segments.pop().unwrap().into_value().ident, - _ => unreachable!(), - }; - let variant_ = match item_impl.items.pop().unwrap() { - syn::ImplItem::Const(item_const) => item_const.ident, - _ => unreachable!(), - }; - state.record_enum_variant(enum_, variant_); - None - } - Item::Struct(item_struct) => { - if state.ignore_types.contains(&item_struct.ident) { - return None; - } - if state.enums.contains_key(&item_struct.ident) { - let enum_ = &item_struct.ident; - let enum_iter = iter::repeat(&item_struct.ident); - let variants = state.enums.get(&item_struct.ident).unwrap().iter(); - Some(quote! { - impl #trait_ for #path_prefix :: #enum_ { - fn write(&self, _fn_name: &'static str, _index: usize, writer: &mut (impl std::io::Write + ?Sized)) -> std::io::Result<()> { - match self { - #(& #path_prefix_iter :: #enum_iter :: #variants => writer.write_all(stringify!(#variants).as_bytes()),)* - _ => write!(writer, "{}", self.0) - } - } - } - }) - } else { - let struct_ = &item_struct.ident; - let (first_field, rest_of_fields) = match item_struct.fields { - Fields::Named(fields) => { - let mut all_idents = fields.named.into_iter().filter_map(|f| { - let f_ident = f.ident.unwrap(); - let name = f_ident.to_string(); - if name.starts_with("reserved") || name == "_unused" { - None - } else { - Some(f_ident) - } - }); - let first = match all_idents.next() { - Some(f) => f, - None => return None, - }; - (first, all_idents) - } - _ => return None, - }; - Some(quote! { - impl #trait_ for #path_prefix :: #struct_ { - fn write(&self, _fn_name: &'static str, _index: usize, writer: &mut (impl std::io::Write + ?Sized)) -> std::io::Result<()> { - writer.write_all(concat!("{ ", stringify!(#first_field), ": ").as_bytes())?; - #trait_::write(&self.#first_field, "", 0, writer)?; - #( - writer.write_all(concat!(", ", stringify!(#rest_of_fields), ": ").as_bytes())?; - #trait_iter::write(&self.#rest_of_fields, "", 0, writer)?; - )* - writer.write_all(b" }") - } - } - }) - } - } - Item::Type(item_type) => { - if state.ignore_types.contains(&item_type.ident) { - return None; - }; - match *(item_type.ty) { - Type::Ptr(_) => { - let type_ = item_type.ident; - Some(quote! { - impl #trait_ for #path_prefix :: #type_ { - fn write(&self, _fn_name: &'static str, _index: usize, writer: &mut (impl std::io::Write + ?Sized)) -> std::io::Result<()> { - write!(writer, "{:p}", *self) - } - } - }) - } - Type::Path(type_path) => { - if type_path.path.leading_colon.is_some() { - let option_seg = type_path.path.segments.last().unwrap(); - if option_seg.ident == "Option" { - match &option_seg.arguments { - PathArguments::AngleBracketed(generic) => match generic.args[0] { - syn::GenericArgument::Type(Type::BareFn(_)) => { - let type_ = &item_type.ident; - return Some(quote! { - impl #trait_ for #path_prefix :: #type_ { - fn write(&self, _fn_name: &'static str, _index: usize, writer: &mut (impl std::io::Write + ?Sized)) -> std::io::Result<()> { - write!(writer, "{:p}", unsafe { std::mem::transmute::<#path_prefix :: #type_, *mut ::std::ffi::c_void>(*self) }) - } - } - }); - } - _ => unreachable!(), - }, - _ => unreachable!(), - } - } - } - None - } - _ => unreachable!(), - } - } - Item::Union(_) => None, - Item::Use(_) => None, - _ => unreachable!(), +impl Parse for OverrideMacro { + fn parse(input: ParseStream) -> syn::Result<Self> { + let macro_ = input.parse::<Path>()?; + input.parse::<Token![<=]>()?; + let functions_content; + bracketed!(functions_content in input); + let functions = functions_content.parse_terminated(Ident::parse, Token![,])?; + Ok(Self { macro_, functions }) } } -struct DeriveDisplayState { - type_path: Path, - trait_: Path, - ignore_types: FxHashSet<Ident>, - ignore_fns: FxHashSet<Ident>, - enums: FxHashMap<Ident, Vec<Ident>>, - result_variants: Vec<ItemConst>, +struct ChooseMacro { + default: (Path, Vec<proc_macro2::TokenStream>), + override_lookup: FxHashMap<Ident, Path>, + override_sets: FxHashMap<Path, Vec<proc_macro2::TokenStream>>, } -impl DeriveDisplayState { - fn new(input: DeriveDisplayInput) -> Self { - DeriveDisplayState { - type_path: input.type_path, - trait_: input.trait_, - ignore_types: input.ignore_types.into_iter().collect(), - ignore_fns: input.ignore_fns.into_iter().collect(), - enums: Default::default(), - result_variants: Vec::new(), +impl ChooseMacro { + fn new(input: FnDeclInput) -> Self { + let mut override_lookup = FxHashMap::default(); + let mut override_sets = FxHashMap::default(); + for OverrideMacro { macro_, functions } in input.overrides { + for ident in functions { + override_lookup.insert(ident, macro_.clone()); + override_sets.insert(macro_.clone(), Vec::new()); + } + } + Self { + default: (input.normal_macro, Vec::new()), + override_lookup, + override_sets, } } - fn record_enum_variant(&mut self, enum_: Ident, variant: Ident) { - match self.enums.entry(enum_) { - hash_map::Entry::Occupied(mut entry) => { - entry.get_mut().push(variant); - } - hash_map::Entry::Vacant(entry) => { - entry.insert(vec![variant]); + fn add(&mut self, ident: &Ident, tokens: proc_macro2::TokenStream) { + match self.override_lookup.get(ident) { + Some(override_macro) => { + self.override_sets + .get_mut(override_macro) + .unwrap() + .push(tokens); } + None => self.default.1.push(tokens), } } } -struct DeriveDisplayInput { - type_path: Path, - trait_: Path, - ignore_types: Punctuated<Ident, Token![,]>, - ignore_fns: Punctuated<Ident, Token![,]>, -} +// For some reason prettyplease will append trailing comma *only* +// if there are two or more arguments +struct FixFnSignatures; -impl Parse for DeriveDisplayInput { - fn parse(input: ParseStream) -> syn::Result<Self> { - let type_path = input.parse::<Path>()?; - input.parse::<Token![,]>()?; - let trait_ = input.parse::<Path>()?; - input.parse::<Token![,]>()?; - let ignore_types_buffer; - bracketed!(ignore_types_buffer in input); - let ignore_types = ignore_types_buffer.parse_terminated(Ident::parse, Token![,])?; - input.parse::<Token![,]>()?; - let ignore_fns_buffer; - bracketed!(ignore_fns_buffer in input); - let ignore_fns = ignore_fns_buffer.parse_terminated(Ident::parse, Token![,])?; - Ok(Self { - type_path, - trait_, - ignore_types, - ignore_fns, - }) +impl VisitMut for FixFnSignatures { + fn visit_signature_mut(&mut self, s: &mut syn::Signature) { + s.inputs.pop_punct(); } } |