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Get multi.c working in the Wasm C API

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This commit is contained in:
Mark McCaskey
2020-12-17 14:35:55 -08:00
parent 8e343633df
commit 62663ab5e1
11 changed files with 146 additions and 22 deletions
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96
lib/c-api/src/wasm_c_api/macros.rs
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@@ -27,6 +27,33 @@ macro_rules! wasm_declare_vec {
pub data: *mut [<wasm_ $name _t>],
}
impl Clone for [<wasm_ $name _vec_t>] {
fn clone(&self) -> Self {
if self.data.is_null() {
return Self {
size: self.size,
data: ::std::ptr::null_mut(),
};
}
let data =
unsafe {
let vec = Vec::from_raw_parts(self.data, self.size, self.size);
let mut vec_copy = vec.clone().into_boxed_slice();
let new_ptr = vec_copy.as_mut_ptr();
::std::mem::forget(vec);
::std::mem::forget(vec_copy);
new_ptr
};
Self {
size: self.size,
data,
}
}
}
impl<'a> From<Vec<[<wasm_ $name _t>]>> for [<wasm_ $name _vec_t>] {
fn from(mut vec: Vec<[<wasm_ $name _t>]>) -> Self {
vec.shrink_to_fit();
@@ -108,6 +135,15 @@ macro_rules! wasm_declare_vec {
::std::mem::forget(bytes);
}
#[doc = "Performs a deep copy of a vector of [`wasm_" $name "_t`]."]
#[no_mangle]
pub unsafe extern "C" fn [<wasm_ $name _vec_copy>](
out_ptr: &mut [<wasm_ $name _vec_t>],
in_ptr: & [<wasm _$name _vec_t>])
{
*out_ptr = in_ptr.clone();
}
#[doc = "Deletes a vector of [`wasm_" $name "_t`]."]
#[no_mangle]
pub unsafe extern "C" fn [<wasm_ $name _vec_delete>](ptr: Option<&mut [<wasm_ $name _vec_t>]>) {
@@ -138,6 +174,34 @@ macro_rules! wasm_declare_boxed_vec {
pub data: *mut *mut [<wasm_ $name _t>],
}
impl Clone for [<wasm_ $name _vec_t>] {
fn clone(&self) -> Self {
if self.data.is_null() {
return Self {
size: self.size,
data: ::std::ptr::null_mut(),
};
}
let data =
unsafe {
let data: *mut Option<Box<[<wasm_ $name _t>]>> = self.data as _;
let vec = Vec::from_raw_parts(data, self.size, self.size);
let mut vec_copy = vec.clone().into_boxed_slice();
let new_ptr = vec_copy.as_mut_ptr() as *mut *mut [<wasm_ $name _t>];
::std::mem::forget(vec);
::std::mem::forget(vec_copy);
new_ptr
};
Self {
size: self.size,
data,
}
}
}
impl<'a> From<Vec<Box<[<wasm_ $name _t>]>>> for [<wasm_ $name _vec_t>] {
fn from(other: Vec<Box<[<wasm_ $name _t>]>>) -> Self {
let boxed_slice: Box<[Box<[<wasm_ $name _t>]>]> = other.into_boxed_slice();
@@ -174,11 +238,11 @@ macro_rules! wasm_declare_boxed_vec {
for i in 0..length {
bytes.push(*init.add(i));
}
let pointer = bytes.as_mut_ptr();
debug_assert!(bytes.len() == bytes.capacity());
let mut boxed_vec = bytes.into_boxed_slice();
let pointer = boxed_vec.as_mut_ptr();
(*out).data = pointer;
(*out).size = length;
::std::mem::forget(bytes);
::std::mem::forget(boxed_vec);
}
#[doc = "Creates a new uninitialized vector of [`wasm_" $name "_t`]."]
@@ -191,15 +255,27 @@ macro_rules! wasm_declare_boxed_vec {
::std::mem::forget(bytes);
}
#[doc = "Performs a deep copy of a vector of [`wasm_" $name "_t`]."]
#[no_mangle]
pub unsafe extern "C" fn [<wasm_ $name _vec_copy>](
out_ptr: &mut [<wasm_ $name _vec_t>],
in_ptr: & [<wasm _$name _vec_t>])
{
*out_ptr = in_ptr.clone();
}
#[doc = "Deletes a vector of [`wasm_" $name "_t`]."]
#[no_mangle]
pub unsafe extern "C" fn [<wasm_ $name _vec_delete>](ptr: *mut [<wasm_ $name _vec_t>]) {
let vec = &mut *ptr;
if !vec.data.is_null() {
let data: Vec<*mut [<wasm_ $name _t>]> = Vec::from_raw_parts(vec.data, vec.size, vec.size);
let _data: Vec<Box<[<wasm_ $name _t>]>> = ::std::mem::transmute(data);
vec.data = ::std::ptr::null_mut();
vec.size = 0;
pub unsafe extern "C" fn [<wasm_ $name _vec_delete>](ptr: Option<&mut[<wasm_ $name _vec_t>]>) {
if let Some(vec) = ptr {
if !vec.data.is_null() {
let ptr: *mut Option<Box<[<wasm_ $name _t>]>> = vec.data as _;
let data: Vec<Option<Box<[<wasm_ $name _t>]>>> = Vec::from_raw_parts(ptr, vec.size, vec.size);
vec.data = ::std::ptr::null_mut();
vec.size = 0;
}
}
}
}