cca558cd20
This commit removes `HostRef<T>` from the C API which only served the purpose now of converting each type to a `wasm_ref_t*`. Our implementation, however, does not guarantee that you'll get the same `wasm_ref_t*` for each actual underlying item (e.g. if you put a func in a table and then get the func as an export and from the table then `same` will report `false`). Additionally the fate of `wasm_ref_t*` seems somewhat unclear at this point. The change here is to make the `same` and cast functions all abort saying they're unimplemented. (similar to the host info functions). If and when we get around to reimplementing these functions we can ensure they're implemented uniformly and work well for all intended use cases.
93 lines
2.4 KiB
Rust
93 lines
2.4 KiB
Rust
use crate::{handle_result, wasmtime_error_t};
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use crate::{wasm_extern_t, wasm_globaltype_t, wasm_store_t, wasm_val_t};
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use std::ptr;
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use wasmtime::{Extern, Global};
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#[derive(Clone)]
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#[repr(transparent)]
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pub struct wasm_global_t {
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ext: wasm_extern_t,
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}
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wasmtime_c_api_macros::declare_ref!(wasm_global_t);
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impl wasm_global_t {
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pub(crate) fn try_from(e: &wasm_extern_t) -> Option<&wasm_global_t> {
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match &e.which {
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Extern::Global(_) => Some(unsafe { &*(e as *const _ as *const _) }),
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_ => None,
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}
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}
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fn global(&self) -> &Global {
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match &self.ext.which {
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Extern::Global(g) => g,
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_ => unsafe { std::hint::unreachable_unchecked() },
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}
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}
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}
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#[no_mangle]
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pub extern "C" fn wasm_global_new(
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store: &wasm_store_t,
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gt: &wasm_globaltype_t,
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val: &wasm_val_t,
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) -> Option<Box<wasm_global_t>> {
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let mut global = ptr::null_mut();
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match wasmtime_global_new(store, gt, val, &mut global) {
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Some(_err) => None,
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None => {
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assert!(!global.is_null());
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Some(unsafe { Box::from_raw(global) })
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}
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}
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}
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#[no_mangle]
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pub extern "C" fn wasmtime_global_new(
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store: &wasm_store_t,
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gt: &wasm_globaltype_t,
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val: &wasm_val_t,
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ret: &mut *mut wasm_global_t,
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) -> Option<Box<wasmtime_error_t>> {
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let global = Global::new(&store.store, gt.ty().ty.clone(), val.val());
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handle_result(global, |global| {
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*ret = Box::into_raw(Box::new(wasm_global_t {
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ext: wasm_extern_t {
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which: global.into(),
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},
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}));
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})
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}
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#[no_mangle]
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pub extern "C" fn wasm_global_as_extern(g: &wasm_global_t) -> &wasm_extern_t {
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&g.ext
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}
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#[no_mangle]
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pub extern "C" fn wasm_global_type(g: &wasm_global_t) -> Box<wasm_globaltype_t> {
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let globaltype = g.global().ty();
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Box::new(wasm_globaltype_t::new(globaltype))
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}
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#[no_mangle]
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pub extern "C" fn wasm_global_get(g: &wasm_global_t, out: &mut wasm_val_t) {
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out.set(g.global().get());
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}
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#[no_mangle]
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pub extern "C" fn wasm_global_set(g: &wasm_global_t, val: &wasm_val_t) {
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let result = g.global().set(val.val());
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// FIXME(WebAssembly/wasm-c-api#131) should communicate the error here
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drop(result);
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}
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#[no_mangle]
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pub extern "C" fn wasmtime_global_set(
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g: &wasm_global_t,
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val: &wasm_val_t,
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) -> Option<Box<wasmtime_error_t>> {
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handle_result(g.global().set(val.val()), |()| {})
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}
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