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// Copyright 2018-2024 the Deno authors. All rights reserved. MIT license.
use crate::assert_napi_ok;
use crate::napi_get_callback_info;
use crate::napi_new_property;
use napi_sys::ValueType::napi_number;
use napi_sys::*;
use std::cell::RefCell;
use std::collections::HashMap;
use std::os::raw::c_char;
use std::os::raw::c_void;
use std::ptr;
pub struct NapiObject {
counter: i32,
}
thread_local! {
// map from native object ptr to napi reference (this is similar to what napi-rs does)
static REFS: RefCell<HashMap<*mut c_void, napi_ref>> = RefCell::new(HashMap::new());
}
pub extern "C" fn finalize_napi_object(
env: napi_env,
finalize_data: *mut c_void,
_finalize_hint: *mut c_void,
) {
let obj = unsafe { Box::from_raw(finalize_data as *mut NapiObject) };
drop(obj);
if let Some(reference) =
REFS.with_borrow_mut(|map| map.remove(&finalize_data))
{
unsafe { napi_delete_reference(env, reference) };
}
}
impl NapiObject {
fn new_inner(
env: napi_env,
info: napi_callback_info,
finalizer: napi_finalize,
out_ptr: Option<*mut napi_ref>,
) -> napi_value {
assert!(matches!(
(finalizer, out_ptr),
(None, None) | (Some(_), Some(_))
));
let mut new_target: napi_value = ptr::null_mut();
assert_napi_ok!(napi_get_new_target(env, info, &mut new_target));
let is_constructor = !new_target.is_null();
let (args, argc, this) = napi_get_callback_info!(env, info, 1);
assert_eq!(argc, 1);
if is_constructor {
let mut value = 0;
let mut ty = -1;
assert_napi_ok!(napi_typeof(env, args[0], &mut ty));
assert_eq!(ty, napi_number);
assert_napi_ok!(napi_get_value_int32(env, args[0], &mut value));
let obj = Box::new(Self { counter: value });
let obj_raw = Box::into_raw(obj) as *mut c_void;
assert_napi_ok!(napi_wrap(
env,
this,
obj_raw,
finalizer,
ptr::null_mut(),
out_ptr.unwrap_or(ptr::null_mut())
));
if let Some(p) = out_ptr {
if finalizer.is_some() {
REFS.with_borrow_mut(|map| map.insert(obj_raw, unsafe { p.read() }));
}
}
return this;
}
unreachable!();
}
#[allow(clippy::new_ret_no_self)]
pub extern "C" fn new(env: napi_env, info: napi_callback_info) -> napi_value {
Self::new_inner(env, info, None, None)
}
#[allow(clippy::new_ret_no_self)]
pub extern "C" fn new_with_finalizer(
env: napi_env,
info: napi_callback_info,
) -> napi_value {
let mut out = ptr::null_mut();
Self::new_inner(env, info, Some(finalize_napi_object), Some(&mut out))
}
pub extern "C" fn set_value(
env: napi_env,
info: napi_callback_info,
) -> napi_value {
let (args, argc, this) = napi_get_callback_info!(env, info, 1);
assert_eq!(argc, 1);
let mut obj: *mut Self = ptr::null_mut();
assert_napi_ok!(napi_unwrap(
env,
this,
&mut obj as *mut _ as *mut *mut c_void
));
assert_napi_ok!(napi_get_value_int32(env, args[0], &mut (*obj).counter));
ptr::null_mut()
}
pub extern "C" fn get_value(
env: napi_env,
info: napi_callback_info,
) -> napi_value {
let (_args, argc, this) = napi_get_callback_info!(env, info, 0);
assert_eq!(argc, 0);
let mut obj: *mut Self = ptr::null_mut();
assert_napi_ok!(napi_unwrap(
env,
this,
&mut obj as *mut _ as *mut *mut c_void
));
let mut num: napi_value = ptr::null_mut();
assert_napi_ok!(napi_create_int32(env, (*obj).counter, &mut num));
num
}
pub extern "C" fn increment(
env: napi_env,
info: napi_callback_info,
) -> napi_value {
let (_args, argc, this) = napi_get_callback_info!(env, info, 0);
assert_eq!(argc, 0);
let mut obj: *mut Self = ptr::null_mut();
assert_napi_ok!(napi_unwrap(
env,
this,
&mut obj as *mut _ as *mut *mut c_void
));
unsafe {
(*obj).counter += 1;
}
ptr::null_mut()
}
pub extern "C" fn factory(
env: napi_env,
info: napi_callback_info,
) -> napi_value {
let (_args, argc, _this) = napi_get_callback_info!(env, info, 0);
assert_eq!(argc, 0);
let int64 = 64;
let mut value: napi_value = ptr::null_mut();
assert_napi_ok!(napi_create_int64(env, int64, &mut value));
value
}
}
pub fn init(env: napi_env, exports: napi_value) {
let mut static_prop = napi_new_property!(env, "factory", NapiObject::factory);
static_prop.attributes = PropertyAttributes::static_;
let properties = &[
napi_new_property!(env, "set_value", NapiObject::set_value),
napi_new_property!(env, "get_value", NapiObject::get_value),
napi_new_property!(env, "increment", NapiObject::increment),
static_prop,
];
let mut cons: napi_value = ptr::null_mut();
assert_napi_ok!(napi_define_class(
env,
"NapiObject\0".as_ptr() as *mut c_char,
usize::MAX,
Some(NapiObject::new),
ptr::null_mut(),
properties.len(),
properties.as_ptr(),
&mut cons,
));
assert_napi_ok!(napi_set_named_property(
env,
exports,
"NapiObject\0".as_ptr() as *const c_char,
cons,
));
let mut cons: napi_value = ptr::null_mut();
assert_napi_ok!(napi_define_class(
env,
c"NapiObjectOwned".as_ptr(),
usize::MAX,
Some(NapiObject::new_with_finalizer),
ptr::null_mut(),
properties.len(),
properties.as_ptr(),
&mut cons,
));
assert_napi_ok!(napi_set_named_property(
env,
exports,
"NapiObjectOwned\0".as_ptr() as *const c_char,
cons,
));
}
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