mirror of
https://github.com/denoland/deno.git
synced 2024-12-12 18:42:18 -05:00
616 lines
19 KiB
Rust
616 lines
19 KiB
Rust
// Copyright 2018-2023 the Deno authors. All rights reserved. MIT license.
|
|
|
|
#![allow(non_camel_case_types)]
|
|
#![allow(non_upper_case_globals)]
|
|
#![allow(clippy::undocumented_unsafe_blocks)]
|
|
#![deny(clippy::missing_safety_doc)]
|
|
|
|
use core::ptr::NonNull;
|
|
use deno_core::error::type_error;
|
|
use deno_core::error::AnyError;
|
|
use deno_core::futures::channel::mpsc;
|
|
use deno_core::futures::StreamExt;
|
|
use deno_core::op;
|
|
use deno_core::serde_v8;
|
|
use deno_core::Extension;
|
|
use deno_core::OpState;
|
|
use std::cell::RefCell;
|
|
use std::ffi::CString;
|
|
use std::path::Path;
|
|
use std::path::PathBuf;
|
|
use std::task::Poll;
|
|
use std::thread_local;
|
|
|
|
#[cfg(unix)]
|
|
use libloading::os::unix::*;
|
|
|
|
#[cfg(windows)]
|
|
use libloading::os::windows::*;
|
|
|
|
// Expose common stuff for ease of use.
|
|
// `use deno_napi::*`
|
|
pub use deno_core::v8;
|
|
pub use std::ffi::CStr;
|
|
pub use std::mem::transmute;
|
|
pub use std::os::raw::c_char;
|
|
pub use std::os::raw::c_void;
|
|
pub use std::ptr;
|
|
pub use value::napi_value;
|
|
|
|
pub mod function;
|
|
mod value;
|
|
|
|
pub type napi_status = i32;
|
|
pub type napi_env = *mut c_void;
|
|
pub type napi_callback_info = *mut c_void;
|
|
pub type napi_deferred = *mut c_void;
|
|
pub type napi_ref = *mut c_void;
|
|
pub type napi_threadsafe_function = *mut c_void;
|
|
pub type napi_handle_scope = *mut c_void;
|
|
pub type napi_callback_scope = *mut c_void;
|
|
pub type napi_escapable_handle_scope = *mut c_void;
|
|
pub type napi_async_cleanup_hook_handle = *mut c_void;
|
|
pub type napi_async_work = *mut c_void;
|
|
|
|
pub const napi_ok: napi_status = 0;
|
|
pub const napi_invalid_arg: napi_status = 1;
|
|
pub const napi_object_expected: napi_status = 2;
|
|
pub const napi_string_expected: napi_status = 3;
|
|
pub const napi_name_expected: napi_status = 4;
|
|
pub const napi_function_expected: napi_status = 5;
|
|
pub const napi_number_expected: napi_status = 6;
|
|
pub const napi_boolean_expected: napi_status = 7;
|
|
pub const napi_array_expected: napi_status = 8;
|
|
pub const napi_generic_failure: napi_status = 9;
|
|
pub const napi_pending_exception: napi_status = 10;
|
|
pub const napi_cancelled: napi_status = 11;
|
|
pub const napi_escape_called_twice: napi_status = 12;
|
|
pub const napi_handle_scope_mismatch: napi_status = 13;
|
|
pub const napi_callback_scope_mismatch: napi_status = 14;
|
|
pub const napi_queue_full: napi_status = 15;
|
|
pub const napi_closing: napi_status = 16;
|
|
pub const napi_bigint_expected: napi_status = 17;
|
|
pub const napi_date_expected: napi_status = 18;
|
|
pub const napi_arraybuffer_expected: napi_status = 19;
|
|
pub const napi_detachable_arraybuffer_expected: napi_status = 20;
|
|
pub const napi_would_deadlock: napi_status = 21;
|
|
|
|
pub const NAPI_AUTO_LENGTH: usize = usize::MAX;
|
|
|
|
thread_local! {
|
|
pub static MODULE: RefCell<Option<*const NapiModule>> = RefCell::new(None);
|
|
pub static ASYNC_WORK_SENDER: RefCell<Option<mpsc::UnboundedSender<PendingNapiAsyncWork>>> = RefCell::new(None);
|
|
pub static THREAD_SAFE_FN_SENDER: RefCell<Option<mpsc::UnboundedSender<ThreadSafeFunctionStatus>>> = RefCell::new(None);
|
|
}
|
|
|
|
type napi_addon_register_func =
|
|
extern "C" fn(env: napi_env, exports: napi_value) -> napi_value;
|
|
|
|
#[repr(C)]
|
|
#[derive(Clone)]
|
|
pub struct NapiModule {
|
|
pub nm_version: i32,
|
|
pub nm_flags: u32,
|
|
nm_filename: *const c_char,
|
|
pub nm_register_func: napi_addon_register_func,
|
|
nm_modname: *const c_char,
|
|
nm_priv: *mut c_void,
|
|
reserved: [*mut c_void; 4],
|
|
}
|
|
|
|
#[derive(Debug, Clone, PartialEq, Eq)]
|
|
pub enum Error {
|
|
InvalidArg,
|
|
ObjectExpected,
|
|
StringExpected,
|
|
NameExpected,
|
|
FunctionExpected,
|
|
NumberExpected,
|
|
BooleanExpected,
|
|
ArrayExpected,
|
|
GenericFailure,
|
|
PendingException,
|
|
Cancelled,
|
|
EscapeCalledTwice,
|
|
HandleScopeMismatch,
|
|
CallbackScopeMismatch,
|
|
QueueFull,
|
|
Closing,
|
|
BigIntExpected,
|
|
DateExpected,
|
|
ArrayBufferExpected,
|
|
DetachableArraybufferExpected,
|
|
WouldDeadlock,
|
|
}
|
|
|
|
pub type Result = std::result::Result<(), Error>;
|
|
|
|
impl From<Error> for napi_status {
|
|
fn from(error: Error) -> Self {
|
|
match error {
|
|
Error::InvalidArg => napi_invalid_arg,
|
|
Error::ObjectExpected => napi_object_expected,
|
|
Error::StringExpected => napi_string_expected,
|
|
Error::NameExpected => napi_name_expected,
|
|
Error::FunctionExpected => napi_function_expected,
|
|
Error::NumberExpected => napi_number_expected,
|
|
Error::BooleanExpected => napi_boolean_expected,
|
|
Error::ArrayExpected => napi_array_expected,
|
|
Error::GenericFailure => napi_generic_failure,
|
|
Error::PendingException => napi_pending_exception,
|
|
Error::Cancelled => napi_cancelled,
|
|
Error::EscapeCalledTwice => napi_escape_called_twice,
|
|
Error::HandleScopeMismatch => napi_handle_scope_mismatch,
|
|
Error::CallbackScopeMismatch => napi_callback_scope_mismatch,
|
|
Error::QueueFull => napi_queue_full,
|
|
Error::Closing => napi_closing,
|
|
Error::BigIntExpected => napi_bigint_expected,
|
|
Error::DateExpected => napi_date_expected,
|
|
Error::ArrayBufferExpected => napi_arraybuffer_expected,
|
|
Error::DetachableArraybufferExpected => {
|
|
napi_detachable_arraybuffer_expected
|
|
}
|
|
Error::WouldDeadlock => napi_would_deadlock,
|
|
}
|
|
}
|
|
}
|
|
|
|
pub type napi_valuetype = i32;
|
|
|
|
pub const napi_undefined: napi_valuetype = 0;
|
|
pub const napi_null: napi_valuetype = 1;
|
|
pub const napi_boolean: napi_valuetype = 2;
|
|
pub const napi_number: napi_valuetype = 3;
|
|
pub const napi_string: napi_valuetype = 4;
|
|
pub const napi_symbol: napi_valuetype = 5;
|
|
pub const napi_object: napi_valuetype = 6;
|
|
pub const napi_function: napi_valuetype = 7;
|
|
pub const napi_external: napi_valuetype = 8;
|
|
pub const napi_bigint: napi_valuetype = 9;
|
|
|
|
pub type napi_threadsafe_function_release_mode = i32;
|
|
|
|
pub const napi_tsfn_release: napi_threadsafe_function_release_mode = 0;
|
|
pub const napi_tsfn_abortext: napi_threadsafe_function_release_mode = 1;
|
|
|
|
pub type napi_threadsafe_function_call_mode = i32;
|
|
|
|
pub const napi_tsfn_nonblocking: napi_threadsafe_function_call_mode = 0;
|
|
pub const napi_tsfn_blocking: napi_threadsafe_function_call_mode = 1;
|
|
|
|
pub type napi_key_collection_mode = i32;
|
|
|
|
pub const napi_key_include_prototypes: napi_key_collection_mode = 0;
|
|
pub const napi_key_own_only: napi_key_collection_mode = 1;
|
|
|
|
pub type napi_key_filter = i32;
|
|
|
|
pub const napi_key_all_properties: napi_key_filter = 0;
|
|
pub const napi_key_writable: napi_key_filter = 1;
|
|
pub const napi_key_enumerable: napi_key_filter = 1 << 1;
|
|
pub const napi_key_configurable: napi_key_filter = 1 << 2;
|
|
pub const napi_key_skip_strings: napi_key_filter = 1 << 3;
|
|
pub const napi_key_skip_symbols: napi_key_filter = 1 << 4;
|
|
|
|
pub type napi_key_conversion = i32;
|
|
|
|
pub const napi_key_keep_numbers: napi_key_conversion = 0;
|
|
pub const napi_key_numbers_to_strings: napi_key_conversion = 1;
|
|
|
|
pub type napi_typedarray_type = i32;
|
|
|
|
pub const napi_int8_array: napi_typedarray_type = 0;
|
|
pub const napi_uint8_array: napi_typedarray_type = 1;
|
|
pub const napi_uint8_clamped_array: napi_typedarray_type = 2;
|
|
pub const napi_int16_array: napi_typedarray_type = 3;
|
|
pub const napi_uint16_array: napi_typedarray_type = 4;
|
|
pub const napi_int32_array: napi_typedarray_type = 5;
|
|
pub const napi_uint32_array: napi_typedarray_type = 6;
|
|
pub const napi_float32_array: napi_typedarray_type = 7;
|
|
pub const napi_float64_array: napi_typedarray_type = 8;
|
|
pub const napi_bigint64_array: napi_typedarray_type = 9;
|
|
pub const napi_biguint64_array: napi_typedarray_type = 10;
|
|
|
|
pub struct napi_type_tag {
|
|
pub lower: u64,
|
|
pub upper: u64,
|
|
}
|
|
|
|
pub type napi_callback = Option<
|
|
unsafe extern "C" fn(
|
|
env: napi_env,
|
|
info: napi_callback_info,
|
|
) -> napi_value<'static>,
|
|
>;
|
|
|
|
pub type napi_finalize = unsafe extern "C" fn(
|
|
env: napi_env,
|
|
data: *mut c_void,
|
|
finalize_hint: *mut c_void,
|
|
);
|
|
|
|
pub type napi_async_execute_callback =
|
|
unsafe extern "C" fn(env: napi_env, data: *mut c_void);
|
|
|
|
pub type napi_async_complete_callback =
|
|
unsafe extern "C" fn(env: napi_env, status: napi_status, data: *mut c_void);
|
|
|
|
pub type napi_threadsafe_function_call_js = unsafe extern "C" fn(
|
|
env: napi_env,
|
|
js_callback: napi_value,
|
|
context: *mut c_void,
|
|
data: *mut c_void,
|
|
);
|
|
|
|
pub type napi_async_cleanup_hook =
|
|
unsafe extern "C" fn(env: napi_env, data: *mut c_void);
|
|
|
|
pub type napi_property_attributes = i32;
|
|
|
|
pub const napi_default: napi_property_attributes = 0;
|
|
pub const napi_writable: napi_property_attributes = 1 << 0;
|
|
pub const napi_enumerable: napi_property_attributes = 1 << 1;
|
|
pub const napi_configurable: napi_property_attributes = 1 << 2;
|
|
pub const napi_static: napi_property_attributes = 1 << 10;
|
|
pub const napi_default_method: napi_property_attributes =
|
|
napi_writable | napi_configurable;
|
|
pub const napi_default_jsproperty: napi_property_attributes =
|
|
napi_enumerable | napi_configurable | napi_writable;
|
|
|
|
#[repr(C)]
|
|
#[derive(Copy, Clone, Debug)]
|
|
pub struct napi_property_descriptor<'a> {
|
|
pub utf8name: *const c_char,
|
|
pub name: napi_value<'a>,
|
|
pub method: napi_callback,
|
|
pub getter: napi_callback,
|
|
pub setter: napi_callback,
|
|
pub value: napi_value<'a>,
|
|
pub attributes: napi_property_attributes,
|
|
pub data: *mut c_void,
|
|
}
|
|
|
|
#[repr(C)]
|
|
#[derive(Debug)]
|
|
pub struct napi_extended_error_info {
|
|
pub error_message: *const c_char,
|
|
pub engine_reserved: *mut c_void,
|
|
pub engine_error_code: i32,
|
|
pub status_code: napi_status,
|
|
}
|
|
|
|
#[repr(C)]
|
|
#[derive(Debug)]
|
|
pub struct napi_node_version {
|
|
pub major: u32,
|
|
pub minor: u32,
|
|
pub patch: u32,
|
|
pub release: *const c_char,
|
|
}
|
|
|
|
pub type PendingNapiAsyncWork = Box<dyn FnOnce()>;
|
|
|
|
pub struct NapiState {
|
|
// Async tasks.
|
|
pub pending_async_work: Vec<PendingNapiAsyncWork>,
|
|
pub async_work_sender: mpsc::UnboundedSender<PendingNapiAsyncWork>,
|
|
pub async_work_receiver: mpsc::UnboundedReceiver<PendingNapiAsyncWork>,
|
|
// Thread safe functions.
|
|
pub active_threadsafe_functions: usize,
|
|
pub threadsafe_function_receiver:
|
|
mpsc::UnboundedReceiver<ThreadSafeFunctionStatus>,
|
|
pub threadsafe_function_sender:
|
|
mpsc::UnboundedSender<ThreadSafeFunctionStatus>,
|
|
}
|
|
|
|
#[repr(C)]
|
|
#[derive(Debug)]
|
|
/// Env that is shared between all contexts in same native module.
|
|
pub struct EnvShared {
|
|
pub instance_data: *mut c_void,
|
|
pub data_finalize: Option<napi_finalize>,
|
|
pub data_finalize_hint: *mut c_void,
|
|
pub napi_wrap: v8::Global<v8::Private>,
|
|
pub finalize: Option<napi_finalize>,
|
|
pub finalize_hint: *mut c_void,
|
|
pub filename: *const c_char,
|
|
}
|
|
|
|
impl EnvShared {
|
|
pub fn new(napi_wrap: v8::Global<v8::Private>) -> Self {
|
|
Self {
|
|
instance_data: std::ptr::null_mut(),
|
|
data_finalize: None,
|
|
data_finalize_hint: std::ptr::null_mut(),
|
|
napi_wrap,
|
|
finalize: None,
|
|
finalize_hint: std::ptr::null_mut(),
|
|
filename: std::ptr::null(),
|
|
}
|
|
}
|
|
}
|
|
|
|
pub enum ThreadSafeFunctionStatus {
|
|
Alive,
|
|
Dead,
|
|
}
|
|
|
|
#[repr(C)]
|
|
pub struct Env {
|
|
context: NonNull<v8::Context>,
|
|
pub isolate_ptr: *mut v8::OwnedIsolate,
|
|
pub open_handle_scopes: usize,
|
|
pub shared: *mut EnvShared,
|
|
pub async_work_sender: mpsc::UnboundedSender<PendingNapiAsyncWork>,
|
|
pub threadsafe_function_sender:
|
|
mpsc::UnboundedSender<ThreadSafeFunctionStatus>,
|
|
}
|
|
|
|
unsafe impl Send for Env {}
|
|
unsafe impl Sync for Env {}
|
|
|
|
impl Env {
|
|
pub fn new(
|
|
isolate_ptr: *mut v8::OwnedIsolate,
|
|
context: v8::Global<v8::Context>,
|
|
sender: mpsc::UnboundedSender<PendingNapiAsyncWork>,
|
|
threadsafe_function_sender: mpsc::UnboundedSender<ThreadSafeFunctionStatus>,
|
|
) -> Self {
|
|
let sc = sender.clone();
|
|
ASYNC_WORK_SENDER.with(|s| {
|
|
s.replace(Some(sc));
|
|
});
|
|
let ts = threadsafe_function_sender.clone();
|
|
THREAD_SAFE_FN_SENDER.with(|s| {
|
|
s.replace(Some(ts));
|
|
});
|
|
|
|
Self {
|
|
isolate_ptr,
|
|
context: context.into_raw(),
|
|
shared: std::ptr::null_mut(),
|
|
open_handle_scopes: 0,
|
|
async_work_sender: sender,
|
|
threadsafe_function_sender,
|
|
}
|
|
}
|
|
|
|
pub fn shared(&self) -> &EnvShared {
|
|
// SAFETY: the lifetime of `EnvShared` always exceeds the lifetime of `Env`.
|
|
unsafe { &*self.shared }
|
|
}
|
|
|
|
pub fn shared_mut(&mut self) -> &mut EnvShared {
|
|
// SAFETY: the lifetime of `EnvShared` always exceeds the lifetime of `Env`.
|
|
unsafe { &mut *self.shared }
|
|
}
|
|
|
|
pub fn add_async_work(&mut self, async_work: PendingNapiAsyncWork) {
|
|
self.async_work_sender.unbounded_send(async_work).unwrap();
|
|
}
|
|
|
|
#[inline]
|
|
pub fn isolate(&mut self) -> &mut v8::OwnedIsolate {
|
|
// SAFETY: Lifetime of `OwnedIsolate` is longer than `Env`.
|
|
unsafe { &mut *self.isolate_ptr }
|
|
}
|
|
|
|
#[inline]
|
|
pub fn scope(&self) -> v8::CallbackScope {
|
|
// SAFETY: `v8::Local` is always non-null pointer; the `HandleScope` is
|
|
// already on the stack, but we don't have access to it.
|
|
let context = unsafe {
|
|
transmute::<NonNull<v8::Context>, v8::Local<v8::Context>>(self.context)
|
|
};
|
|
// SAFETY: there must be a `HandleScope` on the stack, this is ensured because
|
|
// we are in a V8 callback or the module has already opened a `HandleScope`
|
|
// using `napi_open_handle_scope`.
|
|
unsafe { v8::CallbackScope::new(context) }
|
|
}
|
|
}
|
|
|
|
pub fn init<P: NapiPermissions + 'static>(unstable: bool) -> Extension {
|
|
Extension::builder()
|
|
.ops(vec![op_napi_open::decl::<P>()])
|
|
.event_loop_middleware(|op_state_rc, cx| {
|
|
// `work` can call back into the runtime. It can also schedule an async task
|
|
// but we don't know that now. We need to make the runtime re-poll to make
|
|
// sure no pending NAPI tasks exist.
|
|
let mut maybe_scheduling = false;
|
|
|
|
{
|
|
let mut op_state = op_state_rc.borrow_mut();
|
|
let napi_state = op_state.borrow_mut::<NapiState>();
|
|
|
|
while let Poll::Ready(Some(async_work_fut)) =
|
|
napi_state.async_work_receiver.poll_next_unpin(cx)
|
|
{
|
|
napi_state.pending_async_work.push(async_work_fut);
|
|
}
|
|
|
|
while let Poll::Ready(Some(tsfn_status)) =
|
|
napi_state.threadsafe_function_receiver.poll_next_unpin(cx)
|
|
{
|
|
match tsfn_status {
|
|
ThreadSafeFunctionStatus::Alive => {
|
|
napi_state.active_threadsafe_functions += 1
|
|
}
|
|
ThreadSafeFunctionStatus::Dead => {
|
|
napi_state.active_threadsafe_functions -= 1
|
|
}
|
|
};
|
|
}
|
|
|
|
if napi_state.active_threadsafe_functions > 0 {
|
|
maybe_scheduling = true;
|
|
}
|
|
}
|
|
|
|
loop {
|
|
let maybe_work = {
|
|
let mut op_state = op_state_rc.borrow_mut();
|
|
let napi_state = op_state.borrow_mut::<NapiState>();
|
|
napi_state.pending_async_work.pop()
|
|
};
|
|
|
|
if let Some(work) = maybe_work {
|
|
work();
|
|
maybe_scheduling = true;
|
|
} else {
|
|
break;
|
|
}
|
|
}
|
|
|
|
maybe_scheduling
|
|
})
|
|
.state(move |state| {
|
|
let (async_work_sender, async_work_receiver) =
|
|
mpsc::unbounded::<PendingNapiAsyncWork>();
|
|
let (threadsafe_function_sender, threadsafe_function_receiver) =
|
|
mpsc::unbounded::<ThreadSafeFunctionStatus>();
|
|
state.put(NapiState {
|
|
pending_async_work: Vec::new(),
|
|
async_work_sender,
|
|
async_work_receiver,
|
|
threadsafe_function_sender,
|
|
threadsafe_function_receiver,
|
|
active_threadsafe_functions: 0,
|
|
});
|
|
state.put(Unstable(unstable));
|
|
Ok(())
|
|
})
|
|
.build()
|
|
}
|
|
|
|
pub trait NapiPermissions {
|
|
fn check(&mut self, path: Option<&Path>)
|
|
-> std::result::Result<(), AnyError>;
|
|
}
|
|
|
|
pub struct Unstable(pub bool);
|
|
|
|
fn check_unstable(state: &OpState) {
|
|
let unstable = state.borrow::<Unstable>();
|
|
|
|
if !unstable.0 {
|
|
eprintln!("Unstable API 'node-api'. The --unstable flag must be provided.");
|
|
std::process::exit(70);
|
|
}
|
|
}
|
|
|
|
#[op(v8)]
|
|
fn op_napi_open<NP, 'scope>(
|
|
scope: &mut v8::HandleScope<'scope>,
|
|
op_state: &mut OpState,
|
|
path: String,
|
|
) -> std::result::Result<serde_v8::Value<'scope>, AnyError>
|
|
where
|
|
NP: NapiPermissions + 'static,
|
|
{
|
|
check_unstable(op_state);
|
|
let permissions = op_state.borrow_mut::<NP>();
|
|
permissions.check(Some(&PathBuf::from(&path)))?;
|
|
|
|
let (async_work_sender, tsfn_sender, isolate_ptr) = {
|
|
let napi_state = op_state.borrow::<NapiState>();
|
|
let isolate_ptr = op_state.borrow::<*mut v8::OwnedIsolate>();
|
|
(
|
|
napi_state.async_work_sender.clone(),
|
|
napi_state.threadsafe_function_sender.clone(),
|
|
*isolate_ptr,
|
|
)
|
|
};
|
|
|
|
let napi_wrap_name = v8::String::new(scope, "napi_wrap").unwrap();
|
|
let napi_wrap = v8::Private::new(scope, Some(napi_wrap_name));
|
|
let napi_wrap = v8::Global::new(scope, napi_wrap);
|
|
|
|
// The `module.exports` object.
|
|
let exports = v8::Object::new(scope);
|
|
|
|
let mut env_shared = EnvShared::new(napi_wrap);
|
|
let cstr = CString::new(&*path).unwrap();
|
|
env_shared.filename = cstr.as_ptr();
|
|
std::mem::forget(cstr);
|
|
|
|
let ctx = scope.get_current_context();
|
|
let mut env = Env::new(
|
|
isolate_ptr,
|
|
v8::Global::new(scope, ctx),
|
|
async_work_sender,
|
|
tsfn_sender,
|
|
);
|
|
env.shared = Box::into_raw(Box::new(env_shared));
|
|
let env_ptr = Box::into_raw(Box::new(env)) as _;
|
|
|
|
#[cfg(unix)]
|
|
let flags = RTLD_LAZY;
|
|
#[cfg(not(unix))]
|
|
let flags = 0x00000008;
|
|
|
|
// SAFETY: opening a DLL calls dlopen
|
|
#[cfg(unix)]
|
|
let library = match unsafe { Library::open(Some(&path), flags) } {
|
|
Ok(lib) => lib,
|
|
Err(e) => return Err(type_error(e.to_string())),
|
|
};
|
|
|
|
// SAFETY: opening a DLL calls dlopen
|
|
#[cfg(not(unix))]
|
|
let library = match unsafe { Library::load_with_flags(&path, flags) } {
|
|
Ok(lib) => lib,
|
|
Err(e) => return Err(type_error(e.to_string())),
|
|
};
|
|
|
|
MODULE.with(|cell| {
|
|
let slot = *cell.borrow();
|
|
let obj = match slot {
|
|
Some(nm) => {
|
|
// SAFETY: napi_register_module guarantees that `nm` is valid.
|
|
let nm = unsafe { &*nm };
|
|
assert_eq!(nm.nm_version, 1);
|
|
// SAFETY: we are going blind, calling the register function on the other side.
|
|
let exports = unsafe {
|
|
(nm.nm_register_func)(
|
|
env_ptr,
|
|
std::mem::transmute::<v8::Local<v8::Value>, napi_value>(
|
|
exports.into(),
|
|
),
|
|
)
|
|
};
|
|
|
|
// SAFETY: v8::Local is a pointer to a value and napi_value is also a pointer
|
|
// to a value, they have the same layout
|
|
let exports = unsafe {
|
|
std::mem::transmute::<napi_value, v8::Local<v8::Value>>(exports)
|
|
};
|
|
Ok(serde_v8::Value { v8_value: exports })
|
|
}
|
|
None => {
|
|
// Initializer callback.
|
|
// SAFETY: we are going blind, calling the register function on the other side.
|
|
unsafe {
|
|
let init = library
|
|
.get::<unsafe extern "C" fn(
|
|
env: napi_env,
|
|
exports: napi_value,
|
|
) -> napi_value>(b"napi_register_module_v1")
|
|
.expect("napi_register_module_v1 not found");
|
|
init(
|
|
env_ptr,
|
|
std::mem::transmute::<v8::Local<v8::Value>, napi_value>(
|
|
exports.into(),
|
|
),
|
|
)
|
|
};
|
|
Ok(serde_v8::Value {
|
|
v8_value: exports.into(),
|
|
})
|
|
}
|
|
};
|
|
// NAPI addons can't be unloaded, so we're going to "forget" the library
|
|
// object so it lives till the program exit.
|
|
std::mem::forget(library);
|
|
obj
|
|
})
|
|
}
|