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Code Issues Packages 1 Wiki Activity

fix: clean up some node-api details (#24178)

Browse source 
- fix a few napi_* types
- clean up env hooks
- implement blocking queue in tsfn
- reduce transmutes
- use new `DataView::new` api from rusty_v8
This commit is contained in:
snek 2024-06-11 17:40:44 -07:00 committed by Nathan Whitaker
parent 1400f57449
commit f13742cc73
No known key found for this signature in database
6 changed files with 212 additions and 230 deletions
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134
cli/napi/js_native_api.rs
View file

@ -179,14 +179,15 @@ fn napi_get_last_error_info(
} }
#[napi_sym] #[napi_sym]
fn napi_create_function( fn napi_create_function<'s>(
env: &mut Env, env: &'s mut Env,
name: *const c_char, name: *const c_char,
length: usize, length: usize,
cb: napi_callback, cb: Option<napi_callback>,
cb_info: napi_callback_info, cb_info: napi_callback_info,
result: *mut napi_value, result: *mut napi_value<'s>,
) -> napi_status { ) -> napi_status {
let env_ptr = env as *mut Env;
check_arg!(env, result); check_arg!(env, result);
check_arg!(env, cb); check_arg!(env, cb);
@ -200,7 +201,9 @@ fn napi_create_function(
}; };
unsafe { unsafe {
*result = create_function(env, name, cb, cb_info).into(); *result =
create_function(&mut env.scope(), env_ptr, name, cb.unwrap(), cb_info)
.into();
} }
napi_ok napi_ok
@ -212,12 +215,13 @@ fn napi_define_class<'s>(
env: &'s mut Env, env: &'s mut Env,
utf8name: *const c_char, utf8name: *const c_char,
length: usize, length: usize,
constructor: napi_callback, constructor: Option<napi_callback>,
callback_data: *mut c_void, callback_data: *mut c_void,
property_count: usize, property_count: usize,
properties: *const napi_property_descriptor, properties: *const napi_property_descriptor,
result: *mut napi_value<'s>, result: *mut napi_value<'s>,
) -> napi_status { ) -> napi_status {
let env_ptr = env as *mut Env;
check_arg!(env, result); check_arg!(env, result);
check_arg!(env, constructor); check_arg!(env, constructor);
@ -230,9 +234,13 @@ fn napi_define_class<'s>(
Err(status) => return status, Err(status) => return status,
}; };
let tpl = unsafe { let tpl = create_function_template(
create_function_template(env, Some(name), constructor, callback_data) &mut env.scope(),
}; env_ptr,
Some(name),
constructor.unwrap(),
callback_data,
);
let napi_properties: &[napi_property_descriptor] = if property_count > 0 { let napi_properties: &[napi_property_descriptor] = if property_count > 0 {
unsafe { std::slice::from_raw_parts(properties, property_count) } unsafe { std::slice::from_raw_parts(properties, property_count) }
@ -248,28 +256,18 @@ fn napi_define_class<'s>(
continue; continue;
} }
let name = match unsafe { v8_name_from_property_descriptor(env, p) } { let name = match unsafe { v8_name_from_property_descriptor(env_ptr, p) } {
Ok(name) => name, Ok(name) => name,
Err(status) => return status, Err(status) => return status,
}; };
let method = p.method; if p.getter.is_some() || p.setter.is_some() {
let getter = p.getter; let getter = p.getter.map(|g| {
let setter = p.setter; create_function_template(&mut env.scope(), env_ptr, None, g, p.data)
});
if getter.is_some() || setter.is_some() { let setter = p.setter.map(|s| {
let getter: Option<v8::Local<v8::FunctionTemplate>> = if getter.is_some() create_function_template(&mut env.scope(), env_ptr, None, s, p.data)
{ });
Some(unsafe { create_function_template(env, None, p.getter, p.data) })
} else {
None
};
let setter: Option<v8::Local<v8::FunctionTemplate>> = if setter.is_some()
{
Some(unsafe { create_function_template(env, None, p.setter, p.data) })
} else {
None
};
let mut accessor_property = v8::PropertyAttribute::NONE; let mut accessor_property = v8::PropertyAttribute::NONE;
if getter.is_some() if getter.is_some()
@ -290,9 +288,14 @@ fn napi_define_class<'s>(
let proto = tpl.prototype_template(&mut env.scope()); let proto = tpl.prototype_template(&mut env.scope());
proto.set_accessor_property(name, getter, setter, accessor_property); proto.set_accessor_property(name, getter, setter, accessor_property);
} else if method.is_some() { } else if let Some(method) = p.method {
let function = let function = create_function_template(
unsafe { create_function_template(env, None, p.method, p.data) }; &mut env.scope(),
env_ptr,
None,
method,
p.data,
);
let proto = tpl.prototype_template(&mut env.scope()); let proto = tpl.prototype_template(&mut env.scope());
proto.set(name, function.into()); proto.set(name, function.into());
} else { } else {
@ -301,7 +304,6 @@ fn napi_define_class<'s>(
} }
} }
let env_ptr = env as *mut Env;
let value: v8::Local<v8::Value> = let value: v8::Local<v8::Value> =
tpl.get_function(&mut env.scope()).unwrap().into(); tpl.get_function(&mut env.scope()).unwrap().into();
@ -781,17 +783,19 @@ fn napi_define_properties(
let configurable = property.attributes & napi_configurable != 0; let configurable = property.attributes & napi_configurable != 0;
if property.getter.is_some() || property.setter.is_some() { if property.getter.is_some() || property.setter.is_some() {
let local_getter: v8::Local<v8::Value> = if property.getter.is_some() { let local_getter: v8::Local<v8::Value> = if let Some(getter) =
unsafe { property.getter
create_function(env_ptr, None, property.getter, property.data).into() {
} create_function(&mut env.scope(), env_ptr, None, getter, property.data)
.into()
} else { } else {
v8::undefined(scope).into() v8::undefined(scope).into()
}; };
let local_setter: v8::Local<v8::Value> = if property.setter.is_some() { let local_setter: v8::Local<v8::Value> = if let Some(setter) =
unsafe { property.setter
create_function(env_ptr, None, property.setter, property.data).into() {
} create_function(&mut env.scope(), env_ptr, None, setter, property.data)
.into()
} else { } else {
v8::undefined(scope).into() v8::undefined(scope).into()
}; };
@ -807,11 +811,15 @@ fn napi_define_properties(
{ {
return napi_invalid_arg; return napi_invalid_arg;
} }
} else if property.method.is_some() { } else if let Some(method) = property.method {
let method: v8::Local<v8::Value> = { let method: v8::Local<v8::Value> = {
let function = unsafe { let function = create_function(
create_function(env_ptr, None, property.method, property.data) &mut env.scope(),
}; env_ptr,
None,
method,
property.data,
);
function.into() function.into()
}; };
@ -1692,18 +1700,16 @@ fn napi_call_function(
} }
#[napi_sym] #[napi_sym]
fn napi_get_global(env: *mut Env, result: *mut napi_value) -> napi_status { fn napi_get_global(env_ptr: *mut Env, result: *mut napi_value) -> napi_status {
let env = check_env!(env); let env = check_env!(env_ptr);
check_arg!(env, result); check_arg!(env, result);
let global = v8::Local::new(&mut env.scope(), &env.global);
unsafe { unsafe {
*result = std::mem::transmute::<NonNull<v8::Value>, v8::Local<v8::Value>>( *result = global.into();
env.global,
)
.into();
} }
return napi_clear_last_error(env); return napi_clear_last_error(env_ptr);
} }
#[napi_sym] #[napi_sym]
@ -2869,7 +2875,7 @@ fn napi_create_arraybuffer<'s>(
if !data.is_null() { if !data.is_null() {
unsafe { unsafe {
*data = get_array_buffer_ptr(buffer) as _; *data = get_array_buffer_ptr(buffer);
} }
} }
@ -2915,7 +2921,7 @@ fn napi_create_external_arraybuffer<'s>(
fn napi_get_arraybuffer_info( fn napi_get_arraybuffer_info(
env: *mut Env, env: *mut Env,
value: napi_value, value: napi_value,
data: *mut *mut u8, data: *mut *mut c_void,
length: *mut usize, length: *mut usize,
) -> napi_status { ) -> napi_status {
let env = check_env!(env); let env = check_env!(env);
@ -3121,7 +3127,7 @@ fn napi_get_typedarray_info(
fn napi_create_dataview<'s>( fn napi_create_dataview<'s>(
env: &'s mut Env, env: &'s mut Env,
byte_length: usize, byte_length: usize,
arraybuffer: napi_value, arraybuffer: napi_value<'s>,
byte_offset: usize, byte_offset: usize,
result: *mut napi_value<'s>, result: *mut napi_value<'s>,
) -> napi_status { ) -> napi_status {
@ -3144,26 +3150,8 @@ fn napi_create_dataview<'s>(
} }
} }
// let dataview = v8::DataView::new(&mut env, buffer, byte_offset, byte_length); let dataview =
let dataview = { v8::DataView::new(&mut env.scope(), buffer, byte_offset, byte_length);
let context = &mut env.scope().get_current_context();
let global = context.global(&mut env.scope());
let data_view_name = v8::String::new(&mut env.scope(), "DataView").unwrap();
let data_view =
global.get(&mut env.scope(), data_view_name.into()).unwrap();
let Ok(data_view) = v8::Local::<v8::Function>::try_from(data_view) else {
return napi_function_expected;
};
let byte_offset = v8::Number::new(&mut env.scope(), byte_offset as f64);
let byte_length = v8::Number::new(&mut env.scope(), byte_length as f64);
let Some(dv) = data_view.new_instance(
&mut env.scope(),
&[buffer.into(), byte_offset.into(), byte_length.into()],
) else {
return napi_generic_failure;
};
dv
};
unsafe { unsafe {
*result = dataview.into(); *result = dataview.into();

151
cli/napi/node_api.rs
View file

@ -9,10 +9,11 @@ use super::util::napi_set_last_error;
use super::util::SendPtr; use super::util::SendPtr;
use crate::check_arg; use crate::check_arg;
use crate::check_env; use crate::check_env;
use deno_core::parking_lot::Condvar;
use deno_core::parking_lot::Mutex;
use deno_core::V8CrossThreadTaskSpawner; use deno_core::V8CrossThreadTaskSpawner;
use deno_runtime::deno_napi::*; use deno_runtime::deno_napi::*;
use napi_sym::napi_sym; use napi_sym::napi_sym;
use std::ptr::NonNull;
use std::sync::atomic::AtomicBool; use std::sync::atomic::AtomicBool;
use std::sync::atomic::AtomicU8; use std::sync::atomic::AtomicU8;
use std::sync::atomic::AtomicUsize; use std::sync::atomic::AtomicUsize;
@ -40,14 +41,7 @@ fn napi_add_env_cleanup_hook(
let fun = fun.unwrap(); let fun = fun.unwrap();
let mut env_cleanup_hooks = env.cleanup_hooks.borrow_mut(); env.add_cleanup_hook(fun, arg);
if env_cleanup_hooks
.iter()
.any(|pair| pair.0 == fun && pair.1 == arg)
{
panic!("Cleanup hook with this data already registered");
}
env_cleanup_hooks.push((fun, arg));
napi_ok napi_ok
} }
@ -63,27 +57,21 @@ fn napi_remove_env_cleanup_hook(
let fun = fun.unwrap(); let fun = fun.unwrap();
let mut env_cleanup_hooks = env.cleanup_hooks.borrow_mut(); env.remove_cleanup_hook(fun, arg);
// Hooks are supposed to be removed in LIFO order
let maybe_index = env_cleanup_hooks
.iter()
.rposition(|&pair| pair.0 == fun && pair.1 == arg);
if let Some(index) = maybe_index {
env_cleanup_hooks.remove(index);
} else {
panic!("Cleanup hook with this data not found");
}
napi_ok napi_ok
} }
type AsyncCleanupHandle = (*mut Env, napi_async_cleanup_hook, *mut c_void); struct AsyncCleanupHandle {
env: *mut Env,
hook: napi_async_cleanup_hook,
data: *mut c_void,
}
unsafe extern "C" fn async_cleanup_handler(arg: *mut c_void) { unsafe extern "C" fn async_cleanup_handler(arg: *mut c_void) {
unsafe { unsafe {
let (env, hook, arg) = *Box::<AsyncCleanupHandle>::from_raw(arg as _); let handle = Box::<AsyncCleanupHandle>::from_raw(arg as _);
hook(env as _, arg); (handle.hook)(arg, handle.data);
} }
} }
@ -99,12 +87,13 @@ fn napi_add_async_cleanup_hook(
let hook = hook.unwrap(); let hook = hook.unwrap();
let handle = let handle = Box::into_raw(Box::new(AsyncCleanupHandle {
Box::into_raw(Box::<AsyncCleanupHandle>::new((env, hook, arg))) as _; env,
hook,
data: arg,
})) as *mut c_void;
unsafe { env.add_cleanup_hook(async_cleanup_handler, handle);
napi_add_env_cleanup_hook(env, Some(async_cleanup_handler), handle);
}
if !remove_handle.is_null() { if !remove_handle.is_null() {
unsafe { unsafe {
@ -123,17 +112,12 @@ fn napi_remove_async_cleanup_hook(
return napi_invalid_arg; return napi_invalid_arg;
} }
let handle = unsafe { &*(remove_handle as *mut AsyncCleanupHandle) }; let handle =
unsafe { Box::<AsyncCleanupHandle>::from_raw(remove_handle as _) };
let env = unsafe { &mut *handle.0 }; let env = unsafe { &mut *handle.env };
unsafe { env.remove_cleanup_hook(async_cleanup_handler, remove_handle);
napi_remove_env_cleanup_hook(
env,
Some(async_cleanup_handler),
remove_handle,
);
}
napi_ok napi_ok
} }
@ -142,11 +126,7 @@ fn napi_remove_async_cleanup_hook(
fn napi_fatal_exception(env: &mut Env, err: napi_value) -> napi_status { fn napi_fatal_exception(env: &mut Env, err: napi_value) -> napi_status {
check_arg!(env, err); check_arg!(env, err);
let report_error = unsafe { let report_error = v8::Local::new(&mut env.scope(), &env.report_error);
std::mem::transmute::<NonNull<v8::Function>, v8::Local<v8::Function>>(
env.report_error,
)
};
let this = v8::undefined(&mut env.scope()); let this = v8::undefined(&mut env.scope());
if report_error if report_error
@ -262,7 +242,7 @@ fn napi_make_callback<'s>(
recv: napi_value, recv: napi_value,
func: napi_value, func: napi_value,
argc: usize, argc: usize,
argv: *const napi_value, argv: *const napi_value<'s>,
result: *mut napi_value<'s>, result: *mut napi_value<'s>,
) -> napi_status { ) -> napi_status {
check_arg!(env, recv); check_arg!(env, recv);
@ -312,11 +292,8 @@ fn napi_create_buffer<'s>(
let ab = v8::ArrayBuffer::new(&mut env.scope(), length); let ab = v8::ArrayBuffer::new(&mut env.scope(), length);
let buffer_constructor = unsafe { let buffer_constructor =
std::mem::transmute::<NonNull<v8::Function>, v8::Local<v8::Function>>( v8::Local::new(&mut env.scope(), &env.buffer_constructor);
env.buffer_constructor,
)
};
let Some(buffer) = let Some(buffer) =
buffer_constructor.new_instance(&mut env.scope(), &[ab.into()]) buffer_constructor.new_instance(&mut env.scope(), &[ab.into()])
else { else {
@ -325,7 +302,7 @@ fn napi_create_buffer<'s>(
if !data.is_null() { if !data.is_null() {
unsafe { unsafe {
*data = get_array_buffer_ptr(ab) as _; *data = get_array_buffer_ptr(ab);
} }
} }
@ -359,11 +336,8 @@ fn napi_create_external_buffer<'s>(
let ab = let ab =
v8::ArrayBuffer::with_backing_store(&mut env.scope(), &store.make_shared()); v8::ArrayBuffer::with_backing_store(&mut env.scope(), &store.make_shared());
let buffer_constructor = unsafe { let buffer_constructor =
std::mem::transmute::<NonNull<v8::Function>, v8::Local<v8::Function>>( v8::Local::new(&mut env.scope(), &env.buffer_constructor);
env.buffer_constructor,
)
};
let Some(buffer) = let Some(buffer) =
buffer_constructor.new_instance(&mut env.scope(), &[ab.into()]) buffer_constructor.new_instance(&mut env.scope(), &[ab.into()])
else { else {
@ -389,18 +363,15 @@ fn napi_create_buffer_copy<'s>(
let ab = v8::ArrayBuffer::new(&mut env.scope(), length); let ab = v8::ArrayBuffer::new(&mut env.scope(), length);
let buffer_constructor = unsafe { let buffer_constructor =
std::mem::transmute::<NonNull<v8::Function>, v8::Local<v8::Function>>( v8::Local::new(&mut env.scope(), &env.buffer_constructor);
env.buffer_constructor,
)
};
let Some(buffer) = let Some(buffer) =
buffer_constructor.new_instance(&mut env.scope(), &[ab.into()]) buffer_constructor.new_instance(&mut env.scope(), &[ab.into()])
else { else {
return napi_generic_failure; return napi_generic_failure;
}; };
let ptr = get_array_buffer_ptr(ab) as *mut c_void; let ptr = get_array_buffer_ptr(ab);
unsafe { unsafe {
std::ptr::copy(data, ptr, length); std::ptr::copy(data, ptr, length);
} }
@ -428,11 +399,8 @@ fn napi_is_buffer(
check_arg!(env, value); check_arg!(env, value);
check_arg!(env, result); check_arg!(env, result);
let buffer_constructor = unsafe { let buffer_constructor =
std::mem::transmute::<NonNull<v8::Function>, v8::Local<v8::Function>>( v8::Local::new(&mut env.scope(), &env.buffer_constructor);
env.buffer_constructor,
)
};
let Some(is_buffer) = value let Some(is_buffer) = value
.unwrap() .unwrap()
@ -464,11 +432,8 @@ fn napi_get_buffer_info(
return napi_set_last_error(env, napi_invalid_arg); return napi_set_last_error(env, napi_invalid_arg);
}; };
let buffer_constructor = unsafe { let buffer_constructor =
std::mem::transmute::<NonNull<v8::Function>, v8::Local<v8::Function>>( v8::Local::new(&mut env.scope(), &env.buffer_constructor);
env.buffer_constructor,
)
};
if !ta if !ta
.instance_of(&mut env.scope(), buffer_constructor.into()) .instance_of(&mut env.scope(), buffer_constructor.into())
@ -703,7 +668,9 @@ extern "C" fn default_call_js_cb(
struct TsFn { struct TsFn {
env: *mut Env, env: *mut Env,
func: Option<v8::Global<v8::Function>>, func: Option<v8::Global<v8::Function>>,
_max_queue_size: usize, max_queue_size: usize,
queue_size: Mutex<usize>,
queue_cond: Condvar,
thread_count: AtomicUsize, thread_count: AtomicUsize,
thread_finalize_data: *mut c_void, thread_finalize_data: *mut c_void,
thread_finalize_cb: Option<napi_finalize>, thread_finalize_cb: Option<napi_finalize>,
@ -771,6 +738,7 @@ impl TsFn {
.compare_exchange(false, true, Ordering::SeqCst, Ordering::SeqCst) .compare_exchange(false, true, Ordering::SeqCst, Ordering::SeqCst)
.is_ok() .is_ok()
{ {
tsfn.queue_cond.notify_all();
let tsfnptr = SendPtr(tsfn); let tsfnptr = SendPtr(tsfn);
// drop must be queued in order to preserve ordering consistent // drop must be queued in order to preserve ordering consistent
// with Node.js and so that the finalizer runs on the main thread. // with Node.js and so that the finalizer runs on the main thread.
@ -811,26 +779,34 @@ impl TsFn {
pub fn call( pub fn call(
&self, &self,
data: *mut c_void, data: *mut c_void,
_mode: napi_threadsafe_function_call_mode, mode: napi_threadsafe_function_call_mode,
) -> napi_status { ) -> napi_status {
// TODO:
// if self.max_queue_size > 0 && queued >= self.max_queue_size {
// if mode == napi_tsfn_blocking {
// wait somehow
// } else {
// return napi_queue_full;
// }
// }
if self.is_closing.load(Ordering::SeqCst) { if self.is_closing.load(Ordering::SeqCst) {
return napi_closing; return napi_closing;
} }
if self.max_queue_size > 0 {
let mut queue_size = self.queue_size.lock();
while *queue_size >= self.max_queue_size {
if mode == napi_tsfn_blocking {
self.queue_cond.wait(&mut queue_size);
if self.is_closing.load(Ordering::SeqCst) {
return napi_closing;
}
} else {
return napi_queue_full;
}
}
*queue_size += 1;
}
let is_closed = self.is_closed.clone(); let is_closed = self.is_closed.clone();
let tsfn = SendPtr(self); let tsfn = SendPtr(self);
let data = SendPtr(data); let data = SendPtr(data);
let context = SendPtr(self.context); let context = SendPtr(self.context);
let call_js_cb = self.call_js_cb; let call_js_cb = self.call_js_cb;
self.sender.spawn(move |scope: &mut v8::HandleScope| { self.sender.spawn(move |scope: &mut v8::HandleScope| {
let data = data.take(); let data = data.take();
@ -849,6 +825,15 @@ impl TsFn {
let tsfn = unsafe { &*tsfn }; let tsfn = unsafe { &*tsfn };
if tsfn.max_queue_size > 0 {
let mut queue_size = tsfn.queue_size.lock();
let size = *queue_size;
*queue_size -= 1;
if size == tsfn.max_queue_size {
tsfn.queue_cond.notify_one();
}
}
let func = tsfn.func.as_ref().map(|f| v8::Local::new(scope, f)); let func = tsfn.func.as_ref().map(|f| v8::Local::new(scope, f));
unsafe { unsafe {
@ -918,7 +903,9 @@ fn napi_create_threadsafe_function(
let mut tsfn = Box::new(TsFn { let mut tsfn = Box::new(TsFn {
env, env,
func, func,
_max_queue_size: max_queue_size, max_queue_size,
queue_size: Mutex::new(0),
queue_cond: Condvar::new(),
thread_count: AtomicUsize::new(initial_thread_count), thread_count: AtomicUsize::new(initial_thread_count),
thread_finalize_data, thread_finalize_data,
thread_finalize_cb, thread_finalize_cb,

13
cli/napi/util.rs
View file

@ -15,10 +15,11 @@ impl<T> SendPtr<T> {
unsafe impl<T> Send for SendPtr<T> {} unsafe impl<T> Send for SendPtr<T> {}
unsafe impl<T> Sync for SendPtr<T> {} unsafe impl<T> Sync for SendPtr<T> {}
pub fn get_array_buffer_ptr(ab: v8::Local<v8::ArrayBuffer>) -> *mut u8 { pub fn get_array_buffer_ptr(ab: v8::Local<v8::ArrayBuffer>) -> *mut c_void {
// SAFETY: Thanks to the null pointer optimization, NonNull<T> and Option<NonNull<T>> are guaranteed match ab.data() {
// to have the same size and alignment. Some(p) => p.as_ptr(),
unsafe { std::mem::transmute(ab.data()) } None => std::ptr::null_mut(),
}
} }
struct BufferFinalizer { struct BufferFinalizer {
@ -216,10 +217,6 @@ impl<'s> Nullable for napi_value<'s> {
} }
} }
// TODO: replace Nullable with some sort of "CheckedUnwrap" trait
// *mut T -> &mut MaybeUninit<T>
// Option<T> -> T
// napi_value -> Local<Value>
#[macro_export] #[macro_export]
macro_rules! check_arg { macro_rules! check_arg {
($env: expr, $ptr: expr) => { ($env: expr, $ptr: expr) => {

63
ext/napi/function.rs
View file

@ -4,7 +4,7 @@ use crate::*;
#[repr(C)] #[repr(C)]
#[derive(Debug)] #[derive(Debug)]
pub struct CallbackInfo { pub struct CallbackInfo {
pub env: napi_env, pub env: *mut Env,
pub cb: napi_callback, pub cb: napi_callback,
pub cb_info: napi_callback_info, pub cb_info: napi_callback_info,
pub args: *const c_void, pub args: *const c_void,
@ -13,7 +13,7 @@ pub struct CallbackInfo {
impl CallbackInfo { impl CallbackInfo {
#[inline] #[inline]
pub fn new_raw( pub fn new_raw(
env: napi_env, env: *mut Env,
cb: napi_callback, cb: napi_callback,
cb_info: napi_callback_info, cb_info: napi_callback_info,
) -> *mut Self { ) -> *mut Self {
@ -41,38 +41,27 @@ extern "C" fn call_fn(info: *const v8::FunctionCallbackInfo) {
let info = unsafe { &mut *info_ptr }; let info = unsafe { &mut *info_ptr };
info.args = &args as *const _ as *const c_void; info.args = &args as *const _ as *const c_void;
if let Some(f) = info.cb { // SAFETY: calling user provided function pointer.
// SAFETY: calling user provided function pointer. let value = unsafe { (info.cb)(info.env as napi_env, info_ptr as *mut _) };
let value = unsafe { f(info.env, info_ptr as *mut _) }; if let Some(exc) = unsafe { &mut *info.env }.last_exception.take() {
if let Some(exc) = unsafe { &mut *(info.env as *mut Env) } let scope = unsafe { &mut v8::CallbackScope::new(callback_info) };
.last_exception let exc = v8::Local::new(scope, exc);
.take() scope.throw_exception(exc);
{ }
let scope = unsafe { &mut v8::CallbackScope::new(callback_info) }; if let Some(value) = *value {
let exc = v8::Local::new(scope, exc); rv.set(value);
scope.throw_exception(exc);
}
if let Some(value) = *value {
rv.set(value);
}
} }
} }
/// # Safety pub fn create_function<'s>(
/// env_ptr must be valid scope: &mut v8::HandleScope<'s>,
pub unsafe fn create_function<'a>( env: *mut Env,
env_ptr: *mut Env,
name: Option<v8::Local<v8::String>>, name: Option<v8::Local<v8::String>>,
cb: napi_callback, cb: napi_callback,
cb_info: napi_callback_info, cb_info: napi_callback_info,
) -> v8::Local<'a, v8::Function> { ) -> v8::Local<'s, v8::Function> {
let env = unsafe { &mut *env_ptr }; let external =
let scope = &mut env.scope(); v8::External::new(scope, CallbackInfo::new_raw(env, cb, cb_info) as *mut _);
let external = v8::External::new(
scope,
CallbackInfo::new_raw(env_ptr as _, cb, cb_info) as *mut _,
);
let function = v8::Function::builder_raw(call_fn) let function = v8::Function::builder_raw(call_fn)
.data(external.into()) .data(external.into())
.build(scope) .build(scope)
@ -85,21 +74,15 @@ pub unsafe fn create_function<'a>(
function function
} }
/// # Safety pub fn create_function_template<'s>(
/// env_ptr must be valid scope: &mut v8::HandleScope<'s>,
pub unsafe fn create_function_template<'a>( env: *mut Env,
env_ptr: *mut Env,
name: Option<v8::Local<v8::String>>, name: Option<v8::Local<v8::String>>,
cb: napi_callback, cb: napi_callback,
cb_info: napi_callback_info, cb_info: napi_callback_info,
) -> v8::Local<'a, v8::FunctionTemplate> { ) -> v8::Local<'s, v8::FunctionTemplate> {
let env = unsafe { &mut *env_ptr }; let external =
let scope = &mut env.scope(); v8::External::new(scope, CallbackInfo::new_raw(env, cb, cb_info) as *mut _);
let external = v8::External::new(
scope,
CallbackInfo::new_raw(env_ptr as _, cb, cb_info) as *mut _,
);
let function = v8::FunctionTemplate::builder_raw(call_fn) let function = v8::FunctionTemplate::builder_raw(call_fn)
.data(external.into()) .data(external.into())
.build(scope); .build(scope);

77
ext/napi/lib.rs
View file

@ -187,12 +187,10 @@ pub struct napi_type_tag {
pub upper: u64, pub upper: u64,
} }
pub type napi_callback = Option< pub type napi_callback = unsafe extern "C" fn(
unsafe extern "C" fn( env: napi_env,
env: napi_env, info: napi_callback_info,
info: napi_callback_info, ) -> napi_value<'static>;
) -> napi_value<'static>,
>;
pub type napi_finalize = unsafe extern "C" fn( pub type napi_finalize = unsafe extern "C" fn(
env: napi_env, env: napi_env,
@ -213,8 +211,10 @@ pub type napi_threadsafe_function_call_js = unsafe extern "C" fn(
data: *mut c_void, data: *mut c_void,
); );
pub type napi_async_cleanup_hook = pub type napi_async_cleanup_hook = unsafe extern "C" fn(
unsafe extern "C" fn(env: napi_env, data: *mut c_void); handle: napi_async_cleanup_hook_handle,
data: *mut c_void,
);
pub type napi_cleanup_hook = unsafe extern "C" fn(data: *mut c_void); pub type napi_cleanup_hook = unsafe extern "C" fn(data: *mut c_void);
@ -235,9 +235,9 @@ pub const napi_default_jsproperty: napi_property_attributes =
pub struct napi_property_descriptor<'a> { pub struct napi_property_descriptor<'a> {
pub utf8name: *const c_char, pub utf8name: *const c_char,
pub name: napi_value<'a>, pub name: napi_value<'a>,
pub method: napi_callback, pub method: Option<napi_callback>,
pub getter: napi_callback, pub getter: Option<napi_callback>,
pub setter: napi_callback, pub setter: Option<napi_callback>,
pub value: napi_value<'a>, pub value: napi_value<'a>,
pub attributes: napi_property_attributes, pub attributes: napi_property_attributes,
pub data: *mut c_void, pub data: *mut c_void,
@ -348,13 +348,13 @@ pub struct Env {
pub open_handle_scopes: usize, pub open_handle_scopes: usize,
pub shared: *mut EnvShared, pub shared: *mut EnvShared,
pub async_work_sender: V8CrossThreadTaskSpawner, pub async_work_sender: V8CrossThreadTaskSpawner,
pub cleanup_hooks: Rc<RefCell<Vec<(napi_cleanup_hook, *mut c_void)>>>, cleanup_hooks: Rc<RefCell<Vec<(napi_cleanup_hook, *mut c_void)>>>,
pub external_ops_tracker: ExternalOpsTracker, external_ops_tracker: ExternalOpsTracker,
pub last_error: napi_extended_error_info, pub last_error: napi_extended_error_info,
pub last_exception: Option<v8::Global<v8::Value>>, pub last_exception: Option<v8::Global<v8::Value>>,
pub global: NonNull<v8::Value>, pub global: v8::Global<v8::Object>,
pub buffer_constructor: NonNull<v8::Function>, pub buffer_constructor: v8::Global<v8::Function>,
pub report_error: NonNull<v8::Function>, pub report_error: v8::Global<v8::Function>,
} }
unsafe impl Send for Env {} unsafe impl Send for Env {}
@ -365,7 +365,7 @@ impl Env {
pub fn new( pub fn new(
isolate_ptr: *mut v8::OwnedIsolate, isolate_ptr: *mut v8::OwnedIsolate,
context: v8::Global<v8::Context>, context: v8::Global<v8::Context>,
global: v8::Global<v8::Value>, global: v8::Global<v8::Object>,
buffer_constructor: v8::Global<v8::Function>, buffer_constructor: v8::Global<v8::Function>,
report_error: v8::Global<v8::Function>, report_error: v8::Global<v8::Function>,
sender: V8CrossThreadTaskSpawner, sender: V8CrossThreadTaskSpawner,
@ -375,9 +375,9 @@ impl Env {
Self { Self {
isolate_ptr, isolate_ptr,
context: context.into_raw(), context: context.into_raw(),
global: global.into_raw(), global,
buffer_constructor: buffer_constructor.into_raw(), buffer_constructor,
report_error: report_error.into_raw(), report_error,
shared: std::ptr::null_mut(), shared: std::ptr::null_mut(),
open_handle_scopes: 0, open_handle_scopes: 0,
async_work_sender: sender, async_work_sender: sender,
@ -435,6 +435,35 @@ impl Env {
pub fn threadsafe_function_unref(&mut self) { pub fn threadsafe_function_unref(&mut self) {
self.external_ops_tracker.unref_op(); self.external_ops_tracker.unref_op();
} }
pub fn add_cleanup_hook(
&mut self,
hook: napi_cleanup_hook,
data: *mut c_void,
) {
let mut hooks = self.cleanup_hooks.borrow_mut();
if hooks.iter().any(|pair| pair.0 == hook && pair.1 == data) {
panic!("Cannot register cleanup hook with same data twice");
}
hooks.push((hook, data));
}
pub fn remove_cleanup_hook(
&mut self,
hook: napi_cleanup_hook,
data: *mut c_void,
) {
let mut hooks = self.cleanup_hooks.borrow_mut();
match hooks
.iter()
.rposition(|&pair| pair.0 == hook && pair.1 == data)
{
Some(index) => {
hooks.remove(index);
}
None => panic!("Cannot remove cleanup hook which was not registered"),
}
}
} }
deno_core::extension!(deno_napi, deno_core::extension!(deno_napi,
@ -468,7 +497,7 @@ fn op_napi_open<NP, 'scope>(
scope: &mut v8::HandleScope<'scope>, scope: &mut v8::HandleScope<'scope>,
op_state: Rc<RefCell<OpState>>, op_state: Rc<RefCell<OpState>>,
#[string] path: String, #[string] path: String,
global: v8::Local<'scope, v8::Value>, global: v8::Local<'scope, v8::Object>,
buffer_constructor: v8::Local<'scope, v8::Function>, buffer_constructor: v8::Local<'scope, v8::Function>,
report_error: v8::Local<'scope, v8::Function>, report_error: v8::Local<'scope, v8::Function>,
) -> std::result::Result<v8::Local<'scope, v8::Value>, AnyError> ) -> std::result::Result<v8::Local<'scope, v8::Value>, AnyError>
@ -499,9 +528,6 @@ where
let type_tag = v8::Private::new(scope, Some(type_tag_name)); let type_tag = v8::Private::new(scope, Some(type_tag_name));
let type_tag = v8::Global::new(scope, type_tag); let type_tag = v8::Global::new(scope, type_tag);
// The `module.exports` object.
let exports = v8::Object::new(scope);
let env_shared = EnvShared::new(napi_wrap, type_tag, path.clone()); let env_shared = EnvShared::new(napi_wrap, type_tag, path.clone());
let ctx = scope.get_current_context(); let ctx = scope.get_current_context();
@ -542,6 +568,9 @@ where
slot.take() slot.take()
}); });
// The `module.exports` object.
let exports = v8::Object::new(scope);
let maybe_exports = if let Some(module_to_register) = maybe_module { let maybe_exports = if let Some(module_to_register) = maybe_module {
// SAFETY: napi_register_module guarantees that `module_to_register` is valid. // SAFETY: napi_register_module guarantees that `module_to_register` is valid.
let nm = unsafe { &*module_to_register }; let nm = unsafe { &*module_to_register };

4
ext/napi/value.rs
View file

@ -31,9 +31,7 @@ where
v8::Local<'s, T>: Into<v8::Local<'s, v8::Value>>, v8::Local<'s, T>: Into<v8::Local<'s, v8::Value>>,
{ {
fn from(v: v8::Local<'s, T>) -> Self { fn from(v: v8::Local<'s, T>) -> Self {
// SAFETY: It is safe to cast v8::Local<T> that implements Into<v8::Local<v8::Value>>. Self(Some(NonNull::from(&*v.into())), std::marker::PhantomData)
// `fn into(self)` transmutes anyways.
Self(unsafe { transmute(v) }, std::marker::PhantomData)
} }
} }