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80 lines
2.3 KiB
Rust
80 lines
2.3 KiB
Rust
// Copyright 2018-2025 the Deno authors. MIT license.
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use deno_error::JsErrorBox;
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/// Defines the accepted types that can be used as
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/// parameters and return values in FFI.
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#[derive(Clone, Debug, serde::Deserialize, Eq, PartialEq)]
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#[serde(rename_all = "lowercase")]
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pub enum NativeType {
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Void,
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Bool,
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U8,
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I8,
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U16,
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I16,
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U32,
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I32,
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U64,
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I64,
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USize,
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ISize,
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F32,
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F64,
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Pointer,
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Buffer,
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Function,
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Struct(Box<[NativeType]>),
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}
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impl TryFrom<NativeType> for libffi::middle::Type {
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type Error = JsErrorBox;
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fn try_from(native_type: NativeType) -> Result<Self, Self::Error> {
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Ok(match native_type {
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NativeType::Void => libffi::middle::Type::void(),
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NativeType::U8 | NativeType::Bool => libffi::middle::Type::u8(),
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NativeType::I8 => libffi::middle::Type::i8(),
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NativeType::U16 => libffi::middle::Type::u16(),
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NativeType::I16 => libffi::middle::Type::i16(),
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NativeType::U32 => libffi::middle::Type::u32(),
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NativeType::I32 => libffi::middle::Type::i32(),
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NativeType::U64 => libffi::middle::Type::u64(),
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NativeType::I64 => libffi::middle::Type::i64(),
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NativeType::USize => libffi::middle::Type::usize(),
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NativeType::ISize => libffi::middle::Type::isize(),
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NativeType::F32 => libffi::middle::Type::f32(),
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NativeType::F64 => libffi::middle::Type::f64(),
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NativeType::Pointer | NativeType::Buffer | NativeType::Function => {
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libffi::middle::Type::pointer()
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}
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NativeType::Struct(fields) => {
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libffi::middle::Type::structure(match fields.len() > 0 {
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true => fields
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.iter()
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.map(|field| field.clone().try_into())
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.collect::<Result<Vec<_>, _>>()?,
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false => {
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return Err(JsErrorBox::type_error(
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"Struct must have at least one field",
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))
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}
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})
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}
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})
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}
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}
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#[derive(Clone)]
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pub struct Symbol {
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pub cif: libffi::middle::Cif,
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pub ptr: libffi::middle::CodePtr,
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pub parameter_types: Vec<NativeType>,
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pub result_type: NativeType,
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}
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#[allow(clippy::non_send_fields_in_send_ty)]
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// SAFETY: unsafe trait must have unsafe implementation
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unsafe impl Send for Symbol {}
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// SAFETY: unsafe trait must have unsafe implementation
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unsafe impl Sync for Symbol {}
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