/
delegates.rs
162 lines (143 loc) · 5.97 KB
/
delegates.rs
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
use super::*;
pub fn gen(def: &TypeDef, gen: &Gen) -> TokenStream {
let name = gen_type_ident(def, gen);
if gen.sys {
quote! {
pub type #name = *mut ::core::ffi::c_void;
}
} else {
gen_win_delegate(def, gen)
}
}
fn gen_win_delegate(def: &TypeDef, gen: &Gen) -> TokenStream {
let name = gen_type_ident2(def);
let vtbl = name.join("Vtbl");
let boxed = name.join("Box");
let phantoms = gen_phantoms(def, gen);
let constraints = gen_type_constraints(def, gen);
let generics = gen_type_generics(def, gen);
let method = def.invoke_method();
let signature = method.signature(&def.generics);
let fn_constraint = gen_fn_constraint(&signature, gen);
let cfg = gen.type_cfg(def);
let doc = cfg.gen_doc(gen);
let features = cfg.gen(gen);
let vtbl_signature = gen_vtbl_signature(def, &method, gen);
let invoke = gen_winrt_method(def, InterfaceKind::Default, &method, 3, &mut BTreeMap::new(), gen);
let invoke_upcall = gen_winrt_upcall(&signature, quote! { ((*this).invoke) }, gen);
let mut tokens = quote! {
#doc
#features
#[repr(transparent)]
pub struct #name<#(#generics)*>(pub ::windows::core::IUnknown, #(#phantoms)*) where #(#constraints)*;
#features
impl<#(#constraints)*> #name<#(#generics)*> {
pub fn new<#fn_constraint>(invoke: F) -> Self {
let com = #boxed::<#(#generics)* F> {
vtable: &#boxed::<#(#generics)* F>::VTABLE,
count: ::windows::core::RefCount::new(1),
invoke,
};
unsafe {
::core::mem::transmute(::windows::core::alloc::boxed::Box::new(com))
}
}
#invoke
}
#features
#[repr(C)]
struct #boxed<#(#generics)* #fn_constraint> where #(#constraints)* {
vtable: *const #vtbl<#(#generics)*>,
invoke: F,
count: ::windows::core::RefCount,
}
#features
impl<#(#constraints)* #fn_constraint> #boxed<#(#generics)* F> {
const VTABLE: #vtbl<#(#generics)*> = #vtbl::<#(#generics)*>(
Self::QueryInterface,
Self::AddRef,
Self::Release,
Self::Invoke,
#(#phantoms)*
);
unsafe extern "system" fn QueryInterface(this: ::windows::core::RawPtr, iid: &::windows::core::GUID, interface: *mut ::windows::core::RawPtr) -> ::windows::core::HRESULT {
let this = this as *mut ::windows::core::RawPtr as *mut Self;
*interface = if iid == &<#name<#(#generics)*> as ::windows::core::Interface>::IID ||
iid == &<::windows::core::IUnknown as ::windows::core::Interface>::IID ||
iid == &<::windows::core::IAgileObject as ::windows::core::Interface>::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: ::windows::core::RawPtr) -> u32 {
let this = this as *mut ::windows::core::RawPtr as *mut Self;
(*this).count.add_ref()
}
unsafe extern "system" fn Release(this: ::windows::core::RawPtr) -> u32 {
let this = this as *mut ::windows::core::RawPtr as *mut Self;
let remaining = (*this).count.release();
if remaining == 0 {
::windows::core::alloc::boxed::Box::from_raw(this);
}
remaining
}
unsafe extern "system" fn Invoke #vtbl_signature {
let this = this as *mut ::windows::core::RawPtr as *mut Self;
#invoke_upcall
}
}
};
tokens.combine(&gen_std_traits(def, &cfg, gen));
tokens.combine(&gen_interface_trait(def, &cfg, gen));
tokens.combine(&gen_runtime_trait(def, &cfg, gen));
tokens.combine(&gen_vtbl(def, &cfg, gen));
tokens
}
fn gen_fn_constraint(sig: &MethodSignature, gen: &Gen) -> TokenStream {
let params = sig.params.iter().map(|p| gen_produce_type(p, gen));
let return_sig = if let Some(return_sig) = &sig.return_sig {
let tokens = gen_element_name(&return_sig.kind, gen);
if return_sig.is_array {
quote! { ::windows::core::Array<#tokens> }
} else {
tokens
}
} else {
quote! { () }
};
quote! { F: FnMut(#(#params),*) -> ::windows::core::Result<#return_sig> + 'static }
}
fn gen_produce_type(param: &MethodParam, gen: &Gen) -> TokenStream {
let tokens = gen_element_name(¶m.signature.kind, gen);
if param.signature.is_array {
if param.param.is_input() {
quote! { &[<#tokens as ::windows::core::DefaultType>::DefaultType] }
} else if param.signature.by_ref {
quote! { &mut ::windows::core::Array<#tokens> }
} else {
quote! { &mut [<#tokens as ::windows::core::DefaultType>::DefaultType] }
}
} else if param.param.is_input() {
if let ElementType::GenericParam(_) = param.signature.kind {
quote! { &<#tokens as ::windows::core::DefaultType>::DefaultType }
} else if param.signature.kind.is_primitive() {
quote! { #tokens }
} else if param.signature.kind.is_nullable() {
quote! { &::core::option::Option<#tokens> }
} else {
quote! { &#tokens }
}
} else if param.signature.kind.is_nullable() {
quote! { &mut ::core::option::Option<#tokens> }
} else {
quote! { &mut #tokens }
}
}