mirror of
https://github.com/denoland/deno.git
synced 2024-11-23 15:16:54 -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 {
|
|
_phantom: ::std::marker::PhantomData<()>,
|
|
}
|
|
impl<'scope> deno_core::v8::fast_api::FastFunction for op_listen_fast {
|
|
fn function(&self) -> *const ::std::ffi::c_void {
|
|
op_listen_fast_fn as *const ::std::ffi::c_void
|
|
}
|
|
fn args(&self) -> &'static [deno_core::v8::fast_api::Type] {
|
|
use deno_core::v8::fast_api::Type::*;
|
|
use deno_core::v8::fast_api::CType;
|
|
&[V8Value, CallbackOptions]
|
|
}
|
|
fn return_type(&self) -> deno_core::v8::fast_api::CType {
|
|
deno_core::v8::fast_api::CType::Uint32
|
|
}
|
|
}
|
|
fn op_listen_fast_fn<'scope>(
|
|
_: deno_core::v8::Local<deno_core::v8::Object>,
|
|
fast_api_callback_options: *mut deno_core::v8::fast_api::FastApiCallbackOptions,
|
|
) -> u32 {
|
|
use deno_core::v8;
|
|
use deno_core::_ops;
|
|
let __opts: &mut v8::fast_api::FastApiCallbackOptions = unsafe {
|
|
&mut *fast_api_callback_options
|
|
};
|
|
let __ctx = unsafe {
|
|
&*(v8::Local::<v8::External>::cast(unsafe { __opts.data.data }).value()
|
|
as *const _ops::OpCtx)
|
|
};
|
|
let state = &mut ::std::cell::RefCell::borrow_mut(&__ctx.state);
|
|
let result = op_listen::call(state);
|
|
match result {
|
|
Ok(result) => result,
|
|
Err(err) => {
|
|
state.last_fast_op_error.replace(err);
|
|
__opts.fallback = true;
|
|
Default::default()
|
|
}
|
|
}
|
|
}
|