mirror of
https://github.com/denoland/deno.git
synced 2024-11-30 16:40:57 -05:00
5b9620df7a
Implements fast scheduling of deferred op futures.
```rs
#[op(fast)]
async fn op_read(
state: Rc<RefCell<OpState>>,
rid: ResourceId,
buf: &mut [u8],
) -> Result<u32, Error> {
// ...
}
```
The future is scheduled via a fast API call and polled by the event loop
after being woken up by its waker.
40 lines
1.3 KiB
Text
40 lines
1.3 KiB
Text
struct op_listen_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_listen_fast {
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fn function(&self) -> *const ::std::ffi::c_void {
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op_listen_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::Uint32
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}
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}
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fn op_listen_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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) -> u32 {
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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 __ctx = unsafe {
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&*(v8::Local::<v8::External>::cast(unsafe { __opts.data.data }).value()
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as *const _ops::OpCtx)
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};
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let state = &mut ::std::cell::RefCell::borrow_mut(&__ctx.state);
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let result = op_listen::call(state);
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match result {
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Ok(result) => result,
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Err(err) => {
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state.last_fast_op_error.replace(err);
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__opts.fallback = true;
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Default::default()
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}
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}
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}
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