Trait napi::bindgen_prelude::Task
source · pub trait Task: Send + Sized {
type Output: Send + Sized + 'static;
type JsValue: ToNapiValue + TypeName;
fn compute(&mut self) -> Result<Self::Output>;
fn resolve(&mut self, env: Env, output: Self::Output) -> Result<Self::JsValue>;
fn reject(&mut self, _env: Env, err: Error) -> Result<Self::JsValue> { ... }
fn finally(&mut self, _env: Env) -> Result<()> { ... }
}
Required Associated Types§
Required Methods§
Provided Methods§
sourcefn reject(&mut self, _env: Env, err: Error) -> Result<Self::JsValue>
fn reject(&mut self, _env: Env, err: Error) -> Result<Self::JsValue>
Into this method if compute
return Err
Examples found in repository?
src/async_work.rs (line 126)
110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153
unsafe extern "C" fn complete<T: Task>(
env: sys::napi_env,
status: sys::napi_status,
data: *mut c_void,
) {
let mut work = unsafe { Box::from_raw(data as *mut AsyncWork<T>) };
let value_ptr = mem::replace(&mut work.value, Ok(mem::MaybeUninit::zeroed()));
let deferred = mem::replace(&mut work.deferred, ptr::null_mut());
let napi_async_work = mem::replace(&mut work.napi_async_work, ptr::null_mut());
let value = match value_ptr {
Ok(v) => {
let output = unsafe { v.assume_init() };
work
.inner_task
.resolve(unsafe { Env::from_raw(env) }, output)
}
Err(e) => work.inner_task.reject(unsafe { Env::from_raw(env) }, e),
};
if status != sys::Status::napi_cancelled && work.status.load(Ordering::Relaxed) != 2 {
match check_status!(status)
.and_then(move |_| value)
.and_then(|v| unsafe { ToNapiValue::to_napi_value(env, v) })
{
Ok(v) => {
let status = unsafe { sys::napi_resolve_deferred(env, deferred, v) };
debug_assert!(status == sys::Status::napi_ok, "Resolve promise failed");
}
Err(e) => {
let status =
unsafe { sys::napi_reject_deferred(env, deferred, JsError::from(e).into_value(env)) };
debug_assert!(status == sys::Status::napi_ok, "Reject promise failed");
}
};
}
if let Err(e) = work.inner_task.finally(unsafe { Env::from_raw(env) }) {
debug_assert!(false, "Panic in Task finally fn: {:?}", e);
}
let delete_status = unsafe { sys::napi_delete_async_work(env, napi_async_work) };
debug_assert!(
delete_status == sys::Status::napi_ok,
"Delete async work failed"
);
work.status.store(1, Ordering::Relaxed);
}
sourcefn finally(&mut self, _env: Env) -> Result<()>
fn finally(&mut self, _env: Env) -> Result<()>
Examples found in repository?
src/async_work.rs (line 144)
110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153
unsafe extern "C" fn complete<T: Task>(
env: sys::napi_env,
status: sys::napi_status,
data: *mut c_void,
) {
let mut work = unsafe { Box::from_raw(data as *mut AsyncWork<T>) };
let value_ptr = mem::replace(&mut work.value, Ok(mem::MaybeUninit::zeroed()));
let deferred = mem::replace(&mut work.deferred, ptr::null_mut());
let napi_async_work = mem::replace(&mut work.napi_async_work, ptr::null_mut());
let value = match value_ptr {
Ok(v) => {
let output = unsafe { v.assume_init() };
work
.inner_task
.resolve(unsafe { Env::from_raw(env) }, output)
}
Err(e) => work.inner_task.reject(unsafe { Env::from_raw(env) }, e),
};
if status != sys::Status::napi_cancelled && work.status.load(Ordering::Relaxed) != 2 {
match check_status!(status)
.and_then(move |_| value)
.and_then(|v| unsafe { ToNapiValue::to_napi_value(env, v) })
{
Ok(v) => {
let status = unsafe { sys::napi_resolve_deferred(env, deferred, v) };
debug_assert!(status == sys::Status::napi_ok, "Resolve promise failed");
}
Err(e) => {
let status =
unsafe { sys::napi_reject_deferred(env, deferred, JsError::from(e).into_value(env)) };
debug_assert!(status == sys::Status::napi_ok, "Reject promise failed");
}
};
}
if let Err(e) = work.inner_task.finally(unsafe { Env::from_raw(env) }) {
debug_assert!(false, "Panic in Task finally fn: {:?}", e);
}
let delete_status = unsafe { sys::napi_delete_async_work(env, napi_async_work) };
debug_assert!(
delete_status == sys::Status::napi_ok,
"Delete async work failed"
);
work.status.store(1, Ordering::Relaxed);
}