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fix(c-api) Cherry-pick manually from https://github.com/wasmerio/wasmer/pull/1657.

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This commit is contained in:
Ivan Enderlin
2020-10-01 21:16:29 +02:00
parent bcb88120f7
commit ecb79e2af0
5 changed files with 138 additions and 45 deletions
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31
lib/c-api/src/wasm_c_api/macros.rs
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@@ -36,6 +36,37 @@ macro_rules! wasm_declare_vec {
pub data: *mut [<wasm_ $name _t>],
}
impl<'a> From<Vec<[<wasm_ $name _t>]>> for [<wasm_ $name _vec_t>] {
fn from(other: Vec<[<wasm_ $name _t>]>) -> Self {
let mut boxed_slice = other.into_boxed_slice();
let size = boxed_slice.len();
let data = boxed_slice.as_mut_ptr();
::std::mem::forget(boxed_slice);
Self {
size,
data,
}
}
}
impl<'a, T: Into<[<wasm_ $name _t>]> + Clone> From<&'a [T]> for [<wasm_ $name _vec_t>] {
fn from(other: &'a [T]) -> Self {
let size = other.len();
let mut copied_data = other
.iter()
.cloned()
.map(Into::into)
.collect::<Vec<[<wasm_ $name _t>]>>()
.into_boxed_slice();
let data = copied_data.as_mut_ptr();
::std::mem::forget(copied_data);
Self {
size,
data,
}
}
}
impl [<wasm_ $name _vec_t>] {
pub unsafe fn into_slice(&self) -> Option<&[[<wasm_ $name _t>]]>{
if self.data.is_null() {