From 5b9620df7ac655449abd2cce5292bd4669b1f211 Mon Sep 17 00:00:00 2001
From: Divy Srivastava <dj.srivastava23@gmail.com>
Date: Fri, 11 Nov 2022 05:44:53 -0800
Subject: feat(ops): implement fast lazy async ops (#16579)

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.
---
 ops/optimizer_tests/op_state_warning.out | 40 ++++++++++++++++++++++++++++++++
 1 file changed, 40 insertions(+)
 create mode 100644 ops/optimizer_tests/op_state_warning.out

(limited to 'ops/optimizer_tests/op_state_warning.out')

diff --git a/ops/optimizer_tests/op_state_warning.out b/ops/optimizer_tests/op_state_warning.out
new file mode 100644
index 000000000..2c40b0f71
--- /dev/null
+++ b/ops/optimizer_tests/op_state_warning.out
@@ -0,0 +1,40 @@
+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()
+        }
+    }
+}
-- 
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