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https://github.com/denoland/deno.git
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11b1e901ad
Adds support for passing and returning structs as buffers to FFI. This does not implement fastapi support for structs. Needed for certain system APIs such as AppKit on macOS.
67 lines
1.9 KiB
Rust
67 lines
1.9 KiB
Rust
// Copyright 2018-2023 the Deno authors. All rights reserved. MIT license.
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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 From<NativeType> for libffi::middle::Type {
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fn from(native_type: NativeType) -> Self {
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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) => libffi::middle::Type::structure(
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fields.iter().map(|field| field.clone().into()),
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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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pub can_callback: bool,
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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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