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
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
|
// Copyright 2018-2023 the Deno authors. All rights reserved. MIT license.
use super::generator_state::GeneratorState;
use super::signature::Arg;
use super::signature::NumericArg;
use super::signature::ParsedSignature;
use super::signature::RetVal;
use super::V8MappingError;
use proc_macro2::TokenStream;
use quote::format_ident;
use quote::quote;
#[allow(unused)]
#[derive(Debug, Default, PartialEq, Clone)]
pub(crate) enum FastValue {
#[default]
Void,
Bool,
U32,
I32,
U64,
I64,
F32,
F64,
Pointer,
V8Value,
Uint8Array,
Uint32Array,
Float64Array,
SeqOneByteString,
}
impl FastValue {
/// Quote fast value type.
fn quote_rust_type(&self) -> TokenStream {
match self {
FastValue::Void => quote!(()),
FastValue::Bool => quote!(bool),
FastValue::U32 => quote!(u32),
FastValue::I32 => quote!(i32),
FastValue::U64 => quote!(u64),
FastValue::I64 => quote!(i64),
FastValue::F32 => quote!(f32),
FastValue::F64 => quote!(f64),
FastValue::Pointer => quote!(*mut ::std::ffi::c_void),
FastValue::V8Value => unimplemented!("v8::Local<v8::Value>"),
FastValue::Uint8Array
| FastValue::Uint32Array
| FastValue::Float64Array
| FastValue::SeqOneByteString => unreachable!(),
}
}
/// Quote fast value type's variant.
fn quote_ctype(&self) -> TokenStream {
match &self {
FastValue::Void => quote!(CType::Void),
FastValue::Bool => quote!(CType::Bool),
FastValue::U32 => quote!(CType::Uint32),
FastValue::I32 => quote!(CType::Int32),
FastValue::U64 => quote!(CType::Uint64),
FastValue::I64 => quote!(CType::Int64),
FastValue::F32 => quote!(CType::Float32),
FastValue::F64 => quote!(CType::Float64),
FastValue::Pointer => quote!(CType::Pointer),
FastValue::V8Value => quote!(CType::V8Value),
FastValue::Uint8Array => unreachable!(),
FastValue::Uint32Array => unreachable!(),
FastValue::Float64Array => unreachable!(),
FastValue::SeqOneByteString => quote!(CType::SeqOneByteString),
}
}
/// Quote fast value type's variant.
fn quote_type(&self) -> TokenStream {
match &self {
FastValue::Void => quote!(Type::Void),
FastValue::Bool => quote!(Type::Bool),
FastValue::U32 => quote!(Type::Uint32),
FastValue::I32 => quote!(Type::Int32),
FastValue::U64 => quote!(Type::Uint64),
FastValue::I64 => quote!(Type::Int64),
FastValue::F32 => quote!(Type::Float32),
FastValue::F64 => quote!(Type::Float64),
FastValue::Pointer => quote!(Type::Pointer),
FastValue::V8Value => quote!(Type::V8Value),
FastValue::Uint8Array => quote!(Type::TypedArray(CType::Uint8)),
FastValue::Uint32Array => quote!(Type::TypedArray(CType::Uint32)),
FastValue::Float64Array => quote!(Type::TypedArray(CType::Float64)),
FastValue::SeqOneByteString => quote!(Type::SeqOneByteString),
}
}
}
pub fn generate_dispatch_fast(
generator_state: &mut GeneratorState,
signature: &ParsedSignature,
) -> Result<Option<(TokenStream, TokenStream)>, V8MappingError> {
// Result not fast-call compatible (yet)
if matches!(signature.ret_val, RetVal::Result(..)) {
return Ok(None);
}
let mut inputs = vec![];
for arg in &signature.args {
let fv = match arg {
Arg::OptionNumeric(_) | Arg::SerdeV8(_) => return Ok(None),
Arg::Numeric(NumericArg::bool) => FastValue::Bool,
Arg::Numeric(NumericArg::u32)
| Arg::Numeric(NumericArg::u16)
| Arg::Numeric(NumericArg::u8) => FastValue::U32,
Arg::Numeric(NumericArg::i32)
| Arg::Numeric(NumericArg::i16)
| Arg::Numeric(NumericArg::i8)
| Arg::Numeric(NumericArg::__SMI__) => FastValue::I32,
Arg::Numeric(NumericArg::u64) | Arg::Numeric(NumericArg::usize) => {
FastValue::U64
}
Arg::Numeric(NumericArg::i64) | Arg::Numeric(NumericArg::isize) => {
FastValue::I64
}
_ => {
return Err(V8MappingError::NoMapping("a fast argument", arg.clone()))
}
};
inputs.push(fv);
}
let ret_val = match &signature.ret_val {
RetVal::Infallible(arg) => arg,
RetVal::Result(arg) => arg,
};
let output = match ret_val {
Arg::OptionNumeric(_) | Arg::SerdeV8(_) => return Ok(None),
Arg::Void => FastValue::Void,
Arg::Numeric(NumericArg::bool) => FastValue::Bool,
Arg::Numeric(NumericArg::u32)
| Arg::Numeric(NumericArg::u16)
| Arg::Numeric(NumericArg::u8) => FastValue::U32,
Arg::Numeric(NumericArg::i32)
| Arg::Numeric(NumericArg::i16)
| Arg::Numeric(NumericArg::i8) => FastValue::I32,
Arg::Numeric(NumericArg::u64) | Arg::Numeric(NumericArg::usize) => {
FastValue::U64
}
Arg::Numeric(NumericArg::i64) | Arg::Numeric(NumericArg::isize) => {
FastValue::I64
}
Arg::Special(_) => return Ok(None),
_ => {
return Err(V8MappingError::NoMapping(
"a fast return value",
ret_val.clone(),
))
}
};
let GeneratorState {
fast_function,
deno_core,
..
} = &generator_state;
let input_types = inputs.iter().map(|fv| fv.quote_type());
let output_type = output.quote_ctype();
let fast_definition = quote! {
use #deno_core::v8::fast_api::Type;
use #deno_core::v8::fast_api::CType;
#deno_core::v8::fast_api::FastFunction::new(
&[ #( #input_types ),* ],
#output_type,
Self::#fast_function as *const ::std::ffi::c_void
)
};
let output_type = output.quote_rust_type();
let names = &inputs
.iter()
.enumerate()
.map(|(i, _)| format_ident!("arg{i}"))
.collect::<Vec<_>>();
let types = inputs.iter().map(|rv| rv.quote_rust_type());
let fast_fn = quote!(
fn #fast_function(
_: #deno_core::v8::Local<#deno_core::v8::Object>,
#( #names: #types, )*
) -> #output_type {
#(
let #names = #names as _;
)*
Self::call(#(#names),*)
}
);
Ok(Some((fast_definition, fast_fn)))
}
|
