mirror of
https://github.com/denoland/deno.git
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ca66978a5a
This PR introduces Wasm ops. These calls are optimized for entry from
Wasm land.
The `#[op(wasm)]` attribute is opt-in.
Last parameter `Option<&mut [u8]>` is the memory slice of the Wasm
module *when entered from a Fast API call*. Otherwise, the user is
expected to implement logic to obtain the memory if `None`
```rust
#[op(wasm)]
pub fn op_args_get(
offset: i32,
buffer_offset: i32,
memory: Option<&mut [u8]>,
) {
// ...
}
```
81 lines
2.6 KiB
Text
81 lines
2.6 KiB
Text
#[allow(non_camel_case_types)]
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///Auto-generated by `deno_ops`, i.e: `#[op]`
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///
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///Use `op_wasm::decl()` to get an op-declaration
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///you can include in a `deno_core::Extension`.
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pub struct op_wasm;
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#[doc(hidden)]
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impl op_wasm {
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pub fn name() -> &'static str {
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stringify!(op_wasm)
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}
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pub fn v8_fn_ptr<'scope>() -> deno_core::v8::FunctionCallback {
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use deno_core::v8::MapFnTo;
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Self::v8_func.map_fn_to()
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}
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pub fn decl<'scope>() -> deno_core::OpDecl {
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deno_core::OpDecl {
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name: Self::name(),
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v8_fn_ptr: Self::v8_fn_ptr(),
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enabled: true,
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fast_fn: Some(
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Box::new(op_wasm_fast {
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_phantom: ::std::marker::PhantomData,
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}),
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),
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is_async: false,
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is_unstable: false,
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is_v8: false,
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argc: 1usize,
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}
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}
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#[inline]
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#[allow(clippy::too_many_arguments)]
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fn call(memory: Option<&mut [u8]>) {}
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pub fn v8_func<'scope>(
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scope: &mut deno_core::v8::HandleScope<'scope>,
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args: deno_core::v8::FunctionCallbackArguments,
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mut rv: deno_core::v8::ReturnValue,
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) {
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let ctx = unsafe {
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&*(deno_core::v8::Local::<deno_core::v8::External>::cast(args.data()).value()
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as *const deno_core::_ops::OpCtx)
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};
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let arg_0 = None;
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let result = Self::call(arg_0);
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let op_state = ::std::cell::RefCell::borrow(&*ctx.state);
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op_state.tracker.track_sync(ctx.id);
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}
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}
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struct op_wasm_fast {
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_phantom: ::std::marker::PhantomData<()>,
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}
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impl<'scope> deno_core::v8::fast_api::FastFunction for op_wasm_fast {
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fn function(&self) -> *const ::std::ffi::c_void {
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op_wasm_fast_fn as *const ::std::ffi::c_void
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}
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fn args(&self) -> &'static [deno_core::v8::fast_api::Type] {
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use deno_core::v8::fast_api::Type::*;
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use deno_core::v8::fast_api::CType;
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&[V8Value, CallbackOptions]
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}
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fn return_type(&self) -> deno_core::v8::fast_api::CType {
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deno_core::v8::fast_api::CType::Void
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}
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}
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fn op_wasm_fast_fn<'scope>(
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_: deno_core::v8::Local<deno_core::v8::Object>,
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fast_api_callback_options: *mut deno_core::v8::fast_api::FastApiCallbackOptions,
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) -> () {
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use deno_core::v8;
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use deno_core::_ops;
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let __opts: &mut v8::fast_api::FastApiCallbackOptions = unsafe {
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&mut *fast_api_callback_options
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};
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let memory = unsafe {
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&*(__opts.wasm_memory as *const deno_core::v8::fast_api::FastApiTypedArray<u8>)
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}
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.get_storage_if_aligned();
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let result = op_wasm::call(memory);
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result
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}
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