use crate::*;
use libc::INT_MAX;
#[repr(transparent)]
pub(crate) struct SendPtr<T>(pub *const T);
impl<T> SendPtr<T> {
pub fn take(self) -> *const T {
self.0
}
}
unsafe impl<T> Send for SendPtr<T> {}
unsafe impl<T> Sync for SendPtr<T> {}
pub fn get_array_buffer_ptr(ab: v8::Local<v8::ArrayBuffer>) -> *mut c_void {
match ab.data() {
Some(p) => p.as_ptr(),
None => std::ptr::null_mut(),
}
}
struct BufferFinalizer {
env: *mut Env,
finalize_cb: napi_finalize,
finalize_data: *mut c_void,
finalize_hint: *mut c_void,
}
impl Drop for BufferFinalizer {
fn drop(&mut self) {
unsafe {
(self.finalize_cb)(self.env as _, self.finalize_data, self.finalize_hint);
}
}
}
pub(crate) extern "C" fn backing_store_deleter_callback(
data: *mut c_void,
_byte_length: usize,
deleter_data: *mut c_void,
) {
let mut finalizer =
unsafe { Box::<BufferFinalizer>::from_raw(deleter_data as _) };
finalizer.finalize_data = data;
drop(finalizer);
}
pub(crate) fn make_external_backing_store(
env: *mut Env,
data: *mut c_void,
byte_length: usize,
finalize_data: *mut c_void,
finalize_cb: napi_finalize,
finalize_hint: *mut c_void,
) -> v8::UniqueRef<v8::BackingStore> {
let finalizer = Box::new(BufferFinalizer {
env,
finalize_data,
finalize_cb,
finalize_hint,
});
unsafe {
v8::ArrayBuffer::new_backing_store_from_ptr(
data,
byte_length,
backing_store_deleter_callback,
Box::into_raw(finalizer) as _,
)
}
}
#[macro_export]
macro_rules! check_env {
($env: expr) => {{
let env = $env;
if env.is_null() {
return napi_invalid_arg;
}
unsafe { &mut *env }
}};
}
#[macro_export]
macro_rules! return_error_status_if_false {
($env: expr, $condition: expr, $status: ident) => {
if !$condition {
return Err($crate::util::napi_set_last_error($env, $status).into());
}
};
}
#[macro_export]
macro_rules! return_status_if_false {
($env: expr, $condition: expr, $status: ident) => {
if !$condition {
return $crate::util::napi_set_last_error($env, $status);
}
};
}
pub(crate) unsafe fn check_new_from_utf8_len<'s>(
env: *mut Env,
str_: *const c_char,
len: usize,
) -> Result<v8::Local<'s, v8::String>, napi_status> {
let env = unsafe { &mut *env };
return_error_status_if_false!(
env,
(len == NAPI_AUTO_LENGTH) || len <= INT_MAX as _,
napi_invalid_arg
);
return_error_status_if_false!(env, !str_.is_null(), napi_invalid_arg);
let string = if len == NAPI_AUTO_LENGTH {
let result = unsafe { std::ffi::CStr::from_ptr(str_ as *const _) }.to_str();
return_error_status_if_false!(env, result.is_ok(), napi_generic_failure);
result.unwrap()
} else {
let string = unsafe { std::slice::from_raw_parts(str_ as *const u8, len) };
let result = std::str::from_utf8(string);
return_error_status_if_false!(env, result.is_ok(), napi_generic_failure);
result.unwrap()
};
let result = {
let env = unsafe { &mut *(env as *mut Env) };
v8::String::new(&mut env.scope(), string)
};
return_error_status_if_false!(env, result.is_some(), napi_generic_failure);
Ok(result.unwrap())
}
#[inline]
pub(crate) unsafe fn check_new_from_utf8<'s>(
env: *mut Env,
str_: *const c_char,
) -> Result<v8::Local<'s, v8::String>, napi_status> {
unsafe { check_new_from_utf8_len(env, str_, NAPI_AUTO_LENGTH) }
}
pub(crate) unsafe fn v8_name_from_property_descriptor<'s>(
env: *mut Env,
p: &'s napi_property_descriptor,
) -> Result<v8::Local<'s, v8::Name>, napi_status> {
if !p.utf8name.is_null() {
unsafe { check_new_from_utf8(env, p.utf8name).map(|v| v.into()) }
} else {
match *p.name {
Some(v) => match v.try_into() {
Ok(name) => Ok(name),
Err(_) => Err(napi_name_expected),
},
None => Err(napi_name_expected),
}
}
}
pub(crate) fn napi_clear_last_error(env: *mut Env) -> napi_status {
let env = unsafe { &mut *env };
env.last_error.error_code = napi_ok;
env.last_error.engine_error_code = 0;
env.last_error.engine_reserved = std::ptr::null_mut();
env.last_error.error_message = std::ptr::null_mut();
napi_ok
}
pub(crate) fn napi_set_last_error(
env: *mut Env,
error_code: napi_status,
) -> napi_status {
let env = unsafe { &mut *env };
env.last_error.error_code = error_code;
error_code
}
#[macro_export]
macro_rules! status_call {
($call: expr) => {
let status = $call;
if status != napi_ok {
return status;
}
};
}
pub trait Nullable {
fn is_null(&self) -> bool;
}
impl<T> Nullable for *mut T {
fn is_null(&self) -> bool {
(*self).is_null()
}
}
impl<T> Nullable for *const T {
fn is_null(&self) -> bool {
(*self).is_null()
}
}
impl<T> Nullable for Option<T> {
fn is_null(&self) -> bool {
self.is_none()
}
}
impl<'s> Nullable for napi_value<'s> {
fn is_null(&self) -> bool {
self.is_none()
}
}
#[macro_export]
macro_rules! check_arg {
($env: expr, $ptr: expr) => {
$crate::return_status_if_false!(
$env,
!$crate::util::Nullable::is_null(&$ptr),
napi_invalid_arg
);
};
}
#[macro_export]
macro_rules! napi_wrap {
( $( # [ $attr:meta ] )* $vis:vis fn $name:ident $( < $( $x:lifetime ),* > )? ( $env:ident : & $( $lt:lifetime )? mut Env $( , $ident:ident : $ty:ty )* $(,)? ) -> napi_status $body:block ) => {
$( # [ $attr ] )*
#[no_mangle]
$vis unsafe extern "C" fn $name $( < $( $x ),* > )? ( env_ptr : *mut Env , $( $ident : $ty ),* ) -> napi_status {
let env: & $( $lt )? mut Env = $crate::check_env!(env_ptr);
if env.last_exception.is_some() {
return napi_pending_exception;
}
$crate::util::napi_clear_last_error(env);
let scope_env = unsafe { &mut *env_ptr };
let scope = &mut scope_env.scope();
let try_catch = &mut v8::TryCatch::new(scope);
#[inline(always)]
fn inner $( < $( $x ),* > )? ( $env: & $( $lt )? mut Env , $( $ident : $ty ),* ) -> napi_status $body
log::trace!("NAPI ENTER: {}", stringify!($name));
let result = inner( env, $( $ident ),* );
log::trace!("NAPI EXIT: {} {}", stringify!($name), result);
if let Some(exception) = try_catch.exception() {
let env = unsafe { &mut *env_ptr };
let global = v8::Global::new(env.isolate(), exception);
env.last_exception = Some(global);
return $crate::util::napi_set_last_error(env_ptr, napi_pending_exception);
}
if result != napi_ok {
return $crate::util::napi_set_last_error(env_ptr, result);
}
return result;
}
};
( $( # [ $attr:meta ] )* $vis:vis fn $name:ident $( < $( $x:lifetime ),* > )? ( $( $ident:ident : $ty:ty ),* $(,)? ) -> napi_status $body:block ) => {
$( # [ $attr ] )*
#[no_mangle]
$vis unsafe extern "C" fn $name $( < $( $x ),* > )? ( $( $ident : $ty ),* ) -> napi_status {
#[inline(always)]
fn inner $( < $( $x ),* > )? ( $( $ident : $ty ),* ) -> napi_status $body
log::trace!("NAPI ENTER: {}", stringify!($name));
let result = inner( $( $ident ),* );
log::trace!("NAPI EXIT: {} {}", stringify!($name), result);
result
}
};
}