T0b1/wasmtime
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Revert changes and require Clone if Copy

Browse Source 
This commit aligns `wiggle` a little bit closer with Rust proper in
the sense that now `GuestTypeCopy` implies `GuestTypeClone` which
in turn implies that any type implementing `GuestTypeCopy` will have
to provide `read_from_guest` and `write_to_guest` methods. As a result,
we can safely revert changes introduced in the previous commit.
This commit is contained in:
Jakub Konka
2020-02-24 21:38:12 +01:00
committed by Jakub Konka
parent 694cf117bb
commit a02bce6eaf
4 changed files with 36 additions and 41 deletions
Download Patch File Download Diff File Expand all files Collapse all files

46
crates/generate/src/types.rs
View File

@@ -125,7 +125,7 @@ fn define_int(names: &Names, name: &witx::Id, i: &witx::IntDatatype) -> TokenStr
}
}
impl wiggle_runtime::GuestTypeCopy for #ident {}
impl<'a> wiggle_runtime::GuestTypeCopy<'a> for #ident {}
impl<'a> wiggle_runtime::GuestTypeClone<'a> for #ident {
fn read_from_guest(location: &wiggle_runtime::GuestPtr<#ident>) -> Result<#ident, wiggle_runtime::GuestError> {
Ok(*location.as_ref()?)
@@ -278,7 +278,7 @@ fn define_flags(names: &Names, name: &witx::Id, f: &witx::FlagsDatatype) -> Toke
}
}
impl wiggle_runtime::GuestTypeCopy for #ident {}
impl<'a> wiggle_runtime::GuestTypeCopy<'a> for #ident {}
impl<'a> wiggle_runtime::GuestTypeClone<'a> for #ident {
fn read_from_guest(location: &wiggle_runtime::GuestPtr<#ident>) -> Result<#ident, wiggle_runtime::GuestError> {
Ok(*location.as_ref()?)
@@ -381,7 +381,7 @@ fn define_enum(names: &Names, name: &witx::Id, e: &witx::EnumDatatype) -> TokenS
}
}
impl wiggle_runtime::GuestTypeCopy for #ident {}
impl<'a> wiggle_runtime::GuestTypeCopy<'a> for #ident {}
impl<'a> wiggle_runtime::GuestTypeClone<'a> for #ident {
fn read_from_guest(location: &wiggle_runtime::GuestPtr<#ident>) -> Result<#ident, wiggle_runtime::GuestError> {
use ::std::convert::TryFrom;
@@ -496,7 +496,15 @@ fn define_copy_struct(names: &Names, name: &witx::Id, s: &witx::StructDatatype)
Ok(())
}
}
impl wiggle_runtime::GuestTypeCopy for #ident {}
impl<'a> wiggle_runtime::GuestTypeClone<'a> for #ident {
fn read_from_guest(location: &wiggle_runtime::GuestPtr<'a, #ident>) -> Result<#ident, wiggle_runtime::GuestError> {
Ok(*location.as_ref()?)
}
fn write_to_guest(&self, location: &wiggle_runtime::GuestPtrMut<'a, Self>) {
unsafe { (location.as_raw() as *mut #ident).write(*self) };
}
}
impl<'a> wiggle_runtime::GuestTypeCopy<'a> for #ident {}
}
}
@@ -567,14 +575,14 @@ fn define_ptr_struct(names: &Names, name: &witx::Id, s: &witx::StructDatatype) -
witx::TypeRef::Name(nt) => {
let type_ = names.type_(&nt.name);
quote! {
let #name: #type_ = *location.cast(#offset)?.as_ref()?;
let #name = #type_::read_from_guest(&location.cast(#offset)?)?;
}
}
witx::TypeRef::Value(ty) => match &**ty {
witx::Type::Builtin(builtin) => {
let type_ = names.builtin_type(*builtin, anon_lifetime());
quote! {
let #name: #type_ = *location.cast(#offset)?.as_ref()?;
let #name = #type_::read_from_guest(&location.cast(#offset)?)?;
}
}
witx::Type::Pointer(pointee) => {
@@ -597,30 +605,8 @@ fn define_ptr_struct(names: &Names, name: &witx::Id, s: &witx::StructDatatype) -
let member_writes = s.member_layout().into_iter().map(|ml| {
let name = names.struct_member(&ml.member.name);
let offset = ml.offset as u32;
match &ml.member.tref {
witx::TypeRef::Name(_) => {
quote! {
*location.cast(#offset).expect("cast to inner member").as_ref_mut().expect("inner member as ref mut") = self.#name;
}
}
witx::TypeRef::Value(ty) => match &**ty {
witx::Type::Builtin(_) => {
quote! {
*location.cast(#offset).expect("cast to inner member").as_ref_mut().expect("inner member as ref mut") = self.#name;
}
}
witx::Type::Pointer(_) => {
quote! {
self.#name.write_to_guest(&location.cast(#offset).expect("cast to inner member"));
}
}
witx::Type::ConstPointer(_) => {
quote! {
self.#name.write_to_guest(&location.cast(#offset).expect("cast to inner member"));
}
}
_ => unimplemented!("other anonymous struct members"),
},
quote! {
self.#name.write_to_guest(&location.cast(#offset).expect("cast to inner member"));
}
});