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|
use super::*;
pub fn gen(gen: &Gen, def: TypeDef) -> TokenStream {
if gen
.reader
.type_def_flags(def)
.contains(TypeAttributes::WINRT)
{
gen_delegate(gen, def)
} else {
gen_callback(gen, def)
}
}
fn gen_callback(gen: &Gen, def: TypeDef) -> TokenStream {
let name = to_ident(gen.reader.type_def_name(def));
let method = gen.reader.type_def_invoke_method(def);
let signature = gen.reader.method_def_signature(method, &[]);
let return_type = gen.return_sig(&signature);
let cfg = gen.reader.type_def_cfg(def, &[]);
let doc = gen.cfg_doc(&cfg);
let features = gen.cfg_features(&cfg);
let params = signature.params.iter().map(|p| {
let name = gen.param_name(p.def);
let tokens = gen.type_default_name(&p.ty);
quote! { #name: #tokens }
});
quote! {
#doc
#features
pub type #name = ::core::option::Option<unsafe extern "system" fn(#(#params),*) #return_type>;
}
}
fn gen_delegate(gen: &Gen, def: TypeDef) -> TokenStream {
if gen.sys {
let name = to_ident(gen.reader.type_def_name(def));
quote! {
pub type #name = *mut ::core::ffi::c_void;
}
} else {
gen_win_delegate(gen, def)
}
}
fn gen_win_delegate(gen: &Gen, def: TypeDef) -> TokenStream {
let name = to_ident(gen.reader.type_def_name(def));
let vtbl = name.join("_Vtbl");
let boxed = name.join("Box");
let generics: &Vec<Type> = &gen.reader.type_def_generics(def).collect();
let phantoms = gen.generic_phantoms(generics);
let named_phantoms = gen.generic_named_phantoms(generics);
let constraints = gen.generic_constraints(generics);
let generic_names = gen.generic_names(generics);
let ident = gen.type_def_name(def, generics);
let method = gen.reader.type_def_invoke_method(def);
let signature = gen.reader.method_def_signature(method, generics);
let fn_constraint = gen_fn_constraint(gen, def, &signature);
let cfg = gen.reader.type_def_cfg(def, generics);
let doc = gen.cfg_doc(&cfg);
let features = gen.cfg_features(&cfg);
let vtbl_signature = gen.vtbl_signature(def, generics, &signature);
let invoke = winrt_methods::gen(
gen,
def,
generics,
InterfaceKind::Default,
method,
&mut MethodNames::new(),
&mut MethodNames::new(),
);
let invoke_upcall = winrt_methods::gen_upcall(gen, &signature, quote! { ((*this).invoke) });
let mut tokens = quote! {
#doc
#features
#[repr(transparent)]
pub struct #ident(pub ::windows::core::IUnknown, #phantoms) where #constraints;
#features
impl<#constraints> #ident {
pub fn new<#fn_constraint>(invoke: F) -> Self {
let com = #boxed::<#generic_names F> {
vtable: &#boxed::<#generic_names F>::VTABLE,
count: ::windows::imp::RefCount::new(1),
invoke,
};
unsafe {
::core::mem::transmute(::std::boxed::Box::new(com))
}
}
#invoke
}
#features
#[repr(C)]
struct #boxed<#generic_names #fn_constraint> where #constraints {
vtable: *const #vtbl<#generic_names>,
invoke: F,
count: ::windows::imp::RefCount,
}
#features
impl<#constraints #fn_constraint> #boxed<#generic_names F> {
const VTABLE: #vtbl<#generic_names> = #vtbl::<#generic_names>{
base__: ::windows::core::IUnknown_Vtbl{QueryInterface: Self::QueryInterface, AddRef: Self::AddRef, Release: Self::Release},
Invoke: Self::Invoke,
#(#named_phantoms)*
};
unsafe extern "system" fn QueryInterface(this: *mut ::core::ffi::c_void, iid: &::windows::core::GUID, interface: *mut *const ::core::ffi::c_void) -> ::windows::core::HRESULT {
let this = this as *mut *mut ::core::ffi::c_void as *mut Self;
*interface = if iid == &<#ident as ::windows::core::ComInterface>::IID ||
iid == &<::windows::core::IUnknown as ::windows::core::ComInterface>::IID ||
iid == &<::windows::imp::IAgileObject as ::windows::core::ComInterface>::IID {
&mut (*this).vtable as *mut _ as _
} else {
::core::ptr::null_mut()
};
// TODO: implement IMarshal
if (*interface).is_null() {
::windows::core::HRESULT(-2147467262) // E_NOINTERFACE
} else {
(*this).count.add_ref();
::windows::core::HRESULT(0)
}
}
unsafe extern "system" fn AddRef(this: *mut ::core::ffi::c_void) -> u32 {
let this = this as *mut *mut ::core::ffi::c_void as *mut Self;
(*this).count.add_ref()
}
unsafe extern "system" fn Release(this: *mut ::core::ffi::c_void) -> u32 {
let this = this as *mut *mut ::core::ffi::c_void as *mut Self;
let remaining = (*this).count.release();
if remaining == 0 {
let _ = ::std::boxed::Box::from_raw(this);
}
remaining
}
unsafe extern "system" fn Invoke #vtbl_signature {
let this = this as *mut *mut ::core::ffi::c_void as *mut Self;
#invoke_upcall
}
}
};
tokens.combine(&gen.interface_core_traits(
def,
generics,
&ident,
&constraints,
&phantoms,
&features,
));
tokens.combine(&gen.interface_trait(def, generics, &ident, &constraints, &features, true));
tokens.combine(&gen.interface_winrt_trait(
def,
generics,
&ident,
&constraints,
&phantoms,
&features,
));
tokens.combine(&gen.interface_vtbl(def, generics, &ident, &constraints, &features));
tokens
}
fn gen_fn_constraint(gen: &Gen, def: TypeDef, signature: &Signature) -> TokenStream {
let signature = gen.impl_signature(def, signature);
quote! { F: FnMut #signature + ::core::marker::Send + 'static }
}
|
