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refactor(executor): cleanup uv_async_t alloc logic

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This commit is contained in:
LongYinan 2020-05-11 21:28:53 +08:00
parent a5a1d76ad3
commit f7a0f70830
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GPG key ID: A3FFE134A3E20881
1 changed files with 8 additions and 7 deletions
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15
napi/src/executor.rs
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@ -1,6 +1,6 @@
use futures::task::Poll;
use std::alloc::{alloc, Layout};
use std::future::Future;
use std::mem;
use std::os::raw::c_void;
use std::pin::Pin;
use std::sync::Arc;
@ -36,15 +36,14 @@ struct Task<'a> {
context: Context<'a>,
}
#[inline]
pub fn execute<F: 'static + Future<Output = ()>>(
event_loop: *mut sys::uv_loop_s,
future: F,
) -> Result<()> {
let uninit = mem::MaybeUninit::<sys::uv_async_t>::uninit();
let uv_async_t: Box<sys::uv_async_t> = unsafe { Box::new(uninit.assume_init()) };
let uv_async_t_ref = Box::leak(uv_async_t);
let uv_async_t = unsafe { alloc(Layout::new::<sys::uv_async_t>()) as *mut sys::uv_async_t };
unsafe {
let status = sys::uv_async_init(event_loop, uv_async_t_ref, Some(poll_future));
let status = sys::uv_async_init(event_loop, uv_async_t, Some(poll_future));
if status != 0 {
return Err(Error {
status: Status::Unknown,
@ -54,7 +53,7 @@ pub fn execute<F: 'static + Future<Output = ()>>(
};
unsafe {
let waker = Waker::from_raw(RawWaker::new(
uv_async_t_ref as *mut _ as *const (),
uv_async_t as *const _ as *const (),
&UV_ASYNC_V_TABLE,
));
let context = Context::from_waker(&waker);
@ -65,9 +64,11 @@ pub fn execute<F: 'static + Future<Output = ()>>(
if !task.poll_future() {
let arc_task = Arc::new(task);
sys::uv_handle_set_data(
uv_async_t_ref as *mut _ as *mut sys::uv_handle_t,
uv_async_t as *mut _ as *mut sys::uv_handle_t,
Arc::into_raw(arc_task) as *mut c_void,
);
} else {
sys::uv_close(uv_async_t as *mut _ as *mut sys::uv_handle_t, None);
};
Ok(())
}