cxx/symbols/
rust_vec.rs

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1#![cfg(feature = "alloc")]
2
3use crate::c_char::c_char;
4use crate::rust_string::RustString;
5use crate::rust_vec::RustVec;
6use alloc::vec::Vec;
7use core::mem;
8use core::ptr;
9
10macro_rules! rust_vec_shims {
11    ($segment:expr, $ty:ty) => {
12        const_assert_eq!(mem::size_of::<[usize; 3]>(), mem::size_of::<RustVec<$ty>>());
13        const_assert_eq!(mem::size_of::<Vec<$ty>>(), mem::size_of::<RustVec<$ty>>());
14        const_assert_eq!(mem::align_of::<Vec<$ty>>(), mem::align_of::<RustVec<$ty>>());
15
16        const _: () = {
17            #[export_name = concat!("cxxbridge1$rust_vec$", $segment, "$new")]
18            unsafe extern "C" fn __new(this: *mut RustVec<$ty>) {
19                unsafe { ptr::write(this, RustVec::new()) }
20            }
21            #[export_name = concat!("cxxbridge1$rust_vec$", $segment, "$drop")]
22            unsafe extern "C" fn __drop(this: *mut RustVec<$ty>) {
23                unsafe { ptr::drop_in_place(this) }
24            }
25            #[export_name = concat!("cxxbridge1$rust_vec$", $segment, "$len")]
26            unsafe extern "C" fn __len(this: *const RustVec<$ty>) -> usize {
27                unsafe { &*this }.len()
28            }
29            #[export_name = concat!("cxxbridge1$rust_vec$", $segment, "$capacity")]
30            unsafe extern "C" fn __capacity(this: *const RustVec<$ty>) -> usize {
31                unsafe { &*this }.capacity()
32            }
33            #[export_name = concat!("cxxbridge1$rust_vec$", $segment, "$data")]
34            unsafe extern "C" fn __data(this: *const RustVec<$ty>) -> *const $ty {
35                unsafe { &*this }.as_ptr()
36            }
37            #[export_name = concat!("cxxbridge1$rust_vec$", $segment, "$reserve_total")]
38            unsafe extern "C" fn __reserve_total(this: *mut RustVec<$ty>, new_cap: usize) {
39                unsafe { &mut *this }.reserve_total(new_cap);
40            }
41            #[export_name = concat!("cxxbridge1$rust_vec$", $segment, "$set_len")]
42            unsafe extern "C" fn __set_len(this: *mut RustVec<$ty>, len: usize) {
43                unsafe { (*this).set_len(len) }
44            }
45            #[export_name = concat!("cxxbridge1$rust_vec$", $segment, "$truncate")]
46            unsafe extern "C" fn __truncate(this: *mut RustVec<$ty>, len: usize) {
47                unsafe { (*this).truncate(len) }
48            }
49        };
50    };
51}
52
53macro_rules! rust_vec_shims_for_primitive {
54    ($ty:ident) => {
55        rust_vec_shims!(stringify!($ty), $ty);
56    };
57}
58
59rust_vec_shims_for_primitive!(bool);
60rust_vec_shims_for_primitive!(u8);
61rust_vec_shims_for_primitive!(u16);
62rust_vec_shims_for_primitive!(u32);
63rust_vec_shims_for_primitive!(u64);
64rust_vec_shims_for_primitive!(usize);
65rust_vec_shims_for_primitive!(i8);
66rust_vec_shims_for_primitive!(i16);
67rust_vec_shims_for_primitive!(i32);
68rust_vec_shims_for_primitive!(i64);
69rust_vec_shims_for_primitive!(isize);
70rust_vec_shims_for_primitive!(f32);
71rust_vec_shims_for_primitive!(f64);
72
73rust_vec_shims!("char", c_char);
74rust_vec_shims!("string", RustString);
75rust_vec_shims!("str", &str);
cxx/symbols/rust_vec.rs

cxx/symbols/
rust_vec.rs
