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d13e45f2b3
Part 2 of removing middleware. This is somewhat awkward because `V8CrossThreadTaskSpawner` requires tasks to be `Send`, but NAPI makes heavy use of `!Send` pointers. In addition, Rust causes a closure to be `!Send` if you pull a `!Send` value out of a struct. --------- Signed-off-by: Matt Mastracci <matthew@mastracci.com> Co-authored-by: Divy Srivastava <dj.srivastava23@gmail.com>
105 lines
2.4 KiB
Rust
105 lines
2.4 KiB
Rust
// Copyright 2018-2023 the Deno authors. All rights reserved. MIT license.
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use deno_runtime::deno_napi::*;
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use crate::check_env;
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#[repr(C)]
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pub struct AsyncWork {
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pub data: *mut c_void,
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pub execute: napi_async_execute_callback,
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pub complete: napi_async_complete_callback,
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}
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unsafe impl Send for AsyncWork {}
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unsafe impl Sync for AsyncWork {}
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#[napi_sym::napi_sym]
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fn napi_create_async_work(
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_env: *mut Env,
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_async_resource: napi_value,
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_async_resource_name: napi_value,
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execute: napi_async_execute_callback,
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complete: napi_async_complete_callback,
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data: *mut c_void,
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result: *mut napi_async_work,
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) -> napi_status {
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let mut work = AsyncWork {
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data,
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execute,
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complete,
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};
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let work_box = Box::new(work);
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*result = transmute::<*mut AsyncWork, _>(Box::into_raw(work_box));
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napi_ok
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}
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#[napi_sym::napi_sym]
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fn napi_cancel_async_work(
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_env: &mut Env,
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_async_work: napi_async_work,
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) -> napi_status {
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napi_ok
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}
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/// Frees a previously allocated work object.
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#[napi_sym::napi_sym]
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fn napi_delete_async_work(
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_env: &mut Env,
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work: napi_async_work,
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) -> napi_status {
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let work = Box::from_raw(work as *mut AsyncWork);
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drop(work);
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napi_ok
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}
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#[napi_sym::napi_sym]
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fn napi_queue_async_work(
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env_ptr: *mut Env,
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work: napi_async_work,
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) -> napi_status {
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let work: &AsyncWork = &*(work as *const AsyncWork);
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let Some(env) = env_ptr.as_mut() else {
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return napi_invalid_arg;
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};
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#[repr(transparent)]
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struct SendPtr<T>(*const T);
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unsafe impl<T> Send for SendPtr<T> {}
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unsafe impl<T> Sync for SendPtr<T> {}
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let send_env = SendPtr(env_ptr);
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#[inline(always)]
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fn do_work(ptr: SendPtr<Env>, work: &AsyncWork) {
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// SAFETY: This is a valid async work queue call and it runs on the event loop thread
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unsafe {
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(work.execute)(ptr.0 as napi_env, work.data);
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(work.complete)(ptr.0 as napi_env, napi_ok, work.data);
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}
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}
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env.add_async_work(move || do_work(send_env, work));
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napi_ok
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}
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// NOTE: we don't support "async_hooks::AsyncContext" so these APIs are noops.
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#[napi_sym::napi_sym]
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fn napi_async_init(
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env: *mut Env,
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_async_resource: napi_value,
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_async_resource_name: napi_value,
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result: *mut *mut (),
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) -> napi_status {
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check_env!(env);
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*result = ptr::null_mut();
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napi_ok
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}
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#[napi_sym::napi_sym]
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fn napi_async_destroy(env: *mut Env, async_context: *mut ()) -> napi_status {
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check_env!(env);
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assert!(async_context.is_null());
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napi_ok
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}
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