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feat(napi): property getter and setter with closure ()

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* getter with closure with segment fault

* fix getter closure pointer

* add setter

* Cleanup API

* Add test for `create_function_from_closure`

* Fix compile error

* Fix flaky test title

---------

Co-authored-by: LongYinan <lynweklm@gmail.com>
This commit is contained in:
Victor Teo 2023-03-21 11:22:07 +08:00 • committed by GitHub
parent 550ef7c3cc
commit aee742f185
No known key found for this signature in database
GPG key ID: 4AEE18F83AFDEB23
10 changed files with 348 additions and 102 deletions
crates/napi/src
env.rs
js_values
mod.rsobject_property.rs

267
crates/napi/src/env.rs
View file

@ -569,9 +569,7 @@ impl Env {
F: 'static + Fn(crate::CallContext<'_>) -> Result<R>,
R: ToNapiValue,
{
use crate::CallContext;
let boxed_callback = Box::new(callback);
let closure_data_ptr: *mut F = Box::into_raw(boxed_callback);
let closure_data_ptr = Box::into_raw(Box::new(callback));
let mut raw_result = ptr::null_mut();
let len = name.len();
@ -581,85 +579,7 @@ impl Env {
self.0,
name.as_ptr(),
len,
Some({
unsafe extern "C" fn trampoline<R: ToNapiValue, F: Fn(CallContext<'_>) -> Result<R>>(
raw_env: sys::napi_env,
cb_info: sys::napi_callback_info,
) -> sys::napi_value {
use ::std::panic::{self, AssertUnwindSafe};
panic::catch_unwind(AssertUnwindSafe(|| {
let (raw_this, ref raw_args, closure_data_ptr) = {
let argc = {
let mut argc = 0;
let status = unsafe {
sys::napi_get_cb_info(
raw_env,
cb_info,
&mut argc,
ptr::null_mut(),
ptr::null_mut(),
ptr::null_mut(),
)
};
debug_assert!(
Status::from(status) == Status::Ok,
"napi_get_cb_info failed"
);
argc
};
let mut raw_args = vec![ptr::null_mut(); argc];
let mut raw_this = ptr::null_mut();
let mut closure_data_ptr = ptr::null_mut();
let status = unsafe {
sys::napi_get_cb_info(
raw_env,
cb_info,
&mut { argc },
raw_args.as_mut_ptr(),
&mut raw_this,
&mut closure_data_ptr,
)
};
debug_assert!(
Status::from(status) == Status::Ok,
"napi_get_cb_info failed"
);
(raw_this, raw_args, closure_data_ptr)
};
let closure: &F = unsafe {
closure_data_ptr
.cast::<F>()
.as_ref()
.expect("`napi_get_cb_info` should have yielded non-`NULL` assoc data")
};
let env = &mut unsafe { Env::from_raw(raw_env) };
let ctx = CallContext::new(env, cb_info, raw_this, raw_args, raw_args.len());
closure(ctx)
.and_then(|ret: R| unsafe { <R as ToNapiValue>::to_napi_value(env.0, ret) })
}))
.map_err(|e| {
Error::from_reason(format!(
"panic from Rust code: {}",
if let Some(s) = e.downcast_ref::<String>() {
s
} else if let Some(s) = e.downcast_ref::<&str>() {
s
} else {
"<no error message>"
},
))
})
.and_then(|v| v)
.unwrap_or_else(|e| {
unsafe { JsError::from(e).throw_into(raw_env) };
ptr::null_mut()
})
}
trampoline::<R, F>
}),
Some(trampoline::<R, F>),
closure_data_ptr.cast(), // We let it borrow the data here
&mut raw_result,
)
@ -678,17 +598,7 @@ impl Env {
self.0,
raw_result,
closure_data_ptr.cast(),
Some({
unsafe extern "C" fn finalize_box_trampoline<F>(
_raw_env: sys::napi_env,
closure_data_ptr: *mut c_void,
_finalize_hint: *mut c_void,
) {
drop(unsafe { Box::<F>::from_raw(closure_data_ptr.cast()) })
}
finalize_box_trampoline::<F>
}),
Some(finalize_box_trampoline::<F>),
ptr::null_mut(),
ptr::null_mut(),
)
@ -1506,3 +1416,174 @@ unsafe extern "C" fn async_finalize<Arg, F>(
);
}
}
#[cfg(feature = "napi5")]
pub(crate) unsafe extern "C" fn trampoline<
R: ToNapiValue,
F: Fn(crate::CallContext) -> Result<R>,
>(
raw_env: sys::napi_env,
cb_info: sys::napi_callback_info,
) -> sys::napi_value {
use crate::CallContext;
let (raw_this, raw_args, closure_data_ptr, argc) = {
// Fast path for 4 arguments or less.
let mut argc = 4;
let mut raw_args = Vec::with_capacity(4);
let mut raw_this = ptr::null_mut();
let mut closure_data_ptr = ptr::null_mut();
let status = unsafe {
sys::napi_get_cb_info(
raw_env,
cb_info,
&mut argc,
raw_args.as_mut_ptr(),
&mut raw_this,
&mut closure_data_ptr,
)
};
debug_assert!(
Status::from(status) == Status::Ok,
"napi_get_cb_info failed"
);
// Arguments length greater than 4, resize the vector.
if argc > 4 {
raw_args = vec![ptr::null_mut(); argc];
let status = unsafe {
sys::napi_get_cb_info(
raw_env,
cb_info,
&mut argc,
raw_args.as_mut_ptr(),
&mut raw_this,
&mut closure_data_ptr,
)
};
debug_assert!(
Status::from(status) == Status::Ok,
"napi_get_cb_info failed"
);
} else {
unsafe { raw_args.set_len(argc) };
}
(raw_this, raw_args, closure_data_ptr, argc)
};
let closure: &F = Box::leak(unsafe { Box::from_raw(closure_data_ptr.cast()) });
let mut env = unsafe { Env::from_raw(raw_env) };
let call_context = CallContext::new(&mut env, cb_info, raw_this, raw_args.as_slice(), argc);
closure(call_context)
.and_then(|ret: R| unsafe { <R as ToNapiValue>::to_napi_value(env.0, ret) })
.unwrap_or_else(|e| {
unsafe { JsError::from(e).throw_into(raw_env) };
ptr::null_mut()
})
}
#[cfg(feature = "napi5")]
pub(crate) unsafe extern "C" fn trampoline_setter<
V: FromNapiValue,
F: Fn(Env, crate::bindgen_runtime::Object, V) -> Result<()>,
>(
raw_env: sys::napi_env,
cb_info: sys::napi_callback_info,
) -> sys::napi_value {
use crate::bindgen_runtime::Object;
let (raw_args, raw_this, closure_data_ptr) = {
let mut argc = 1;
let mut raw_args = vec![ptr::null_mut(); 1];
let mut raw_this = ptr::null_mut();
let mut closure_data_ptr = ptr::null_mut();
let status = unsafe {
sys::napi_get_cb_info(
raw_env,
cb_info,
&mut argc,
raw_args.as_mut_ptr(),
&mut raw_this,
&mut closure_data_ptr,
)
};
unsafe { raw_args.set_len(argc) };
debug_assert!(
Status::from(status) == Status::Ok,
"napi_get_cb_info failed"
);
(raw_args, raw_this, closure_data_ptr)
};
let closure: &F = Box::leak(unsafe { Box::from_raw(closure_data_ptr.cast()) });
let env = unsafe { Env::from_raw(raw_env) };
raw_args
.get(0)
.ok_or_else(|| Error::new(Status::InvalidArg, "Missing argument in property setter"))
.and_then(|value| unsafe { V::from_napi_value(raw_env, *value) })
.and_then(|value| {
closure(
env,
unsafe { Object::from_raw_unchecked(raw_env, raw_this) },
value,
)
})
.map(|_| std::ptr::null_mut())
.unwrap_or_else(|e| {
unsafe { JsError::from(e).throw_into(raw_env) };
ptr::null_mut()
})
}
#[cfg(feature = "napi5")]
pub(crate) unsafe extern "C" fn trampoline_getter<
R: ToNapiValue,
F: Fn(Env, crate::bindgen_runtime::This) -> Result<R>,
>(
raw_env: sys::napi_env,
cb_info: sys::napi_callback_info,
) -> sys::napi_value {
let (raw_this, closure_data_ptr) = {
let mut raw_this = ptr::null_mut();
let mut closure_data_ptr = ptr::null_mut();
let status = unsafe {
sys::napi_get_cb_info(
raw_env,
cb_info,
&mut 0,
ptr::null_mut(),
&mut raw_this,
&mut closure_data_ptr,
)
};
debug_assert!(
Status::from(status) == Status::Ok,
"napi_get_cb_info failed"
);
(raw_this, closure_data_ptr)
};
let closure: &F = Box::leak(unsafe { Box::from_raw(closure_data_ptr.cast()) });
let env = unsafe { Env::from_raw(raw_env) };
closure(env, unsafe {
crate::bindgen_runtime::Object::from_raw_unchecked(raw_env, raw_this)
})
.and_then(|ret: R| unsafe { <R as ToNapiValue>::to_napi_value(env.0, ret) })
.unwrap_or_else(|e| {
unsafe { JsError::from(e).throw_into(raw_env) };
ptr::null_mut()
})
}
#[cfg(feature = "napi5")]
pub(crate) unsafe extern "C" fn finalize_box_trampoline<F>(
_raw_env: sys::napi_env,
closure_data_ptr: *mut c_void,
_finalize_hint: *mut c_void,
) {
drop(unsafe { Box::<F>::from_raw(closure_data_ptr.cast()) })
}

50
crates/napi/src/js_values/mod.rs
View file

@ -1,9 +1,11 @@
use std::convert::TryFrom;
#[cfg(feature = "napi5")]
use std::ffi::c_void;
use std::ffi::CString;
use std::ptr;
use crate::{
bindgen_runtime::{FromNapiValue, TypeName, ValidateNapiValue},
bindgen_runtime::{FromNapiValue, ToNapiValue, TypeName, ValidateNapiValue},
check_status, sys, type_of, Callback, Error, Result, Status, ValueType,
};
@ -308,11 +310,16 @@ macro_rules! impl_object_methods {
pub fn set_named_property<T>(&mut self, name: &str, value: T) -> Result<()>
where
T: NapiRaw,
T: ToNapiValue,
{
let key = CString::new(name)?;
check_status!(unsafe {
sys::napi_set_named_property(self.0.env, self.0.value, key.as_ptr(), value.raw())
sys::napi_set_named_property(
self.0.env,
self.0.value,
key.as_ptr(),
T::to_napi_value(self.0.env, value)?,
)
})
}
@ -347,7 +354,7 @@ macro_rules! impl_object_methods {
unsafe { <T as FromNapiValue>::from_napi_value(self.0.env, raw_value) }
}
pub fn get_named_property_unchecked<T>(&self, name: &str) -> Result<T>
pub fn get_named_property_unchecked<T: FromNapiValue>(&self, name: &str) -> Result<T>
where
T: FromNapiValue,
{
@ -539,14 +546,33 @@ macro_rules! impl_object_methods {
/// This method allows the efficient definition of multiple properties on a given object.
pub fn define_properties(&mut self, properties: &[Property]) -> Result<()> {
let properties_iter = properties.iter().map(|property| property.raw());
#[cfg(feature = "napi5")]
{
let mut closures = properties_iter
.clone()
.map(|p| p.data)
.filter(|data| !data.is_null())
.collect::<Vec<*mut std::ffi::c_void>>();
let len = Box::into_raw(Box::new(closures.len()));
check_status!(unsafe {
sys::napi_add_finalizer(
self.0.env,
self.0.value,
closures.as_mut_ptr().cast(),
Some(finalize_closures),
len.cast(),
ptr::null_mut(),
)
})?;
std::mem::forget(closures);
}
check_status!(unsafe {
sys::napi_define_properties(
self.0.env,
self.0.value,
properties.len(),
properties
.iter()
.map(|property| property.raw())
properties_iter
.collect::<Vec<sys::napi_property_descriptor>>()
.as_ptr(),
)
@ -697,3 +723,13 @@ impl JsUnknown {
unsafe { V::from_raw_unchecked(self.0.env, self.0.value) }
}
}
#[cfg(feature = "napi5")]
unsafe extern "C" fn finalize_closures(_env: sys::napi_env, data: *mut c_void, len: *mut c_void) {
let length: usize = *unsafe { Box::from_raw(len.cast()) };
let closures: Vec<*mut PropertyClosures> =
unsafe { Vec::from_raw_parts(data.cast(), length, length) };
for closure in closures.into_iter() {
drop(unsafe { Box::from_raw(closure) });
}
}

63
crates/napi/src/js_values/object_property.rs
View file

@ -1,11 +1,35 @@
use std::convert::From;
#[cfg(feature = "napi5")]
use std::ffi::c_void;
use std::ffi::CString;
use std::ptr;
use bitflags::bitflags;
#[cfg(feature = "napi5")]
use crate::{
bindgen_runtime::{FromNapiValue, This, ToNapiValue},
Env,
};
use crate::{sys, Callback, NapiRaw, Result};
#[cfg(feature = "napi5")]
#[derive(Copy, Clone)]
pub struct PropertyClosures {
setter_closure: *mut c_void,
getter_closure: *mut c_void,
}
#[cfg(feature = "napi5")]
impl Default for PropertyClosures {
fn default() -> Self {
Self {
setter_closure: ptr::null_mut(),
getter_closure: ptr::null_mut(),
}
}
}
#[derive(Clone)]
pub struct Property {
pub name: CString,
@ -15,6 +39,8 @@ pub struct Property {
attrs: PropertyAttributes,
value: sys::napi_value,
pub(crate) is_ctor: bool,
#[cfg(feature = "napi5")]
pub(crate) closures: PropertyClosures,
}
impl Default for Property {
@ -27,6 +53,8 @@ impl Default for Property {
attrs: Default::default(),
value: ptr::null_mut(),
is_ctor: Default::default(),
#[cfg(feature = "napi5")]
closures: PropertyClosures::default(),
}
}
}
@ -77,11 +105,41 @@ impl Property {
self
}
#[cfg(feature = "napi5")]
pub fn with_getter_closure<R, F>(mut self, callback: F) -> Self
where
F: 'static + Fn(Env, This) -> Result<R>,
R: ToNapiValue,
{
let boxed_callback = Box::new(callback);
let closure_data_ptr: *mut F = Box::into_raw(boxed_callback);
self.closures.getter_closure = closure_data_ptr.cast();
let fun = crate::trampoline_getter::<R, F>;
self.getter = Some(fun);
self
}
pub fn with_setter(mut self, callback: Callback) -> Self {
self.setter = Some(callback);
self
}
#[cfg(feature = "napi5")]
pub fn with_setter_closure<F, V>(mut self, callback: F) -> Self
where
F: 'static + Fn(crate::Env, This, V) -> Result<()>,
V: FromNapiValue,
{
let boxed_callback = Box::new(callback);
let closure_data_ptr: *mut F = Box::into_raw(boxed_callback);
self.closures.setter_closure = closure_data_ptr.cast();
let fun = crate::trampoline_setter::<V, F>;
self.setter = Some(fun);
self
}
pub fn with_property_attributes(mut self, attributes: PropertyAttributes) -> Self {
self.attrs = attributes;
self
@ -93,6 +151,8 @@ impl Property {
}
pub(crate) fn raw(&self) -> sys::napi_property_descriptor {
#[cfg(feature = "napi5")]
let closures = Box::into_raw(Box::new(self.closures));
sys::napi_property_descriptor {
utf8name: self.name.as_ptr(),
name: ptr::null_mut(),
@ -101,7 +161,10 @@ impl Property {
setter: self.setter,
value: self.value,
attributes: self.attrs.into(),
#[cfg(not(feature = "napi5"))]
data: ptr::null_mut(),
#[cfg(feature = "napi5")]
data: closures.cast(),
}
}