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Forgot to delete file (#224)
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@ -1,161 +0,0 @@
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use std::marker::PhantomData;
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use crate::scope::Entered;
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use crate::scope::Scope;
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use crate::scope::ScopeDefinition;
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use crate::scope_traits::internal::GetRawIsolate;
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use crate::Context;
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use crate::FunctionCallbackInfo;
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use crate::Isolate;
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use crate::Local;
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use crate::PromiseRejectMessage;
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use crate::PropertyCallbackInfo;
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use crate::ToLocal;
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/// A CallbackScope can be used to obtain a mutable Isolate reference within
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/// a callback that is called by V8 on the thread that already has a Locker
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/// on the stack.
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///
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/// Using a CallbackScope in any other situation is unsafe.
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/// Also note that CallbackScope should not be used for function and property
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/// accessor callbacks; use FunctionCallbackScope and PropertyCallbackScope
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/// instead.
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///
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/// A CallbackScope can be created from the following inputs:
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/// - `&mut Isolate`
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/// ` - `Local<Context>`
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/// - `Local<Message>`
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/// - `Local<Object>`
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/// - `Local<Promise>`
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/// - `Local<SharedArrayBuffer>`
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/// - `&PromiseRejectMessage`
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pub struct CallbackScope<X = Default> {
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isolate: *mut Isolate,
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phantom: PhantomData<X>,
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}
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pub struct Default;
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pub struct Escapable;
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impl<'s> CallbackScope {
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pub fn new<I>(input: I) -> Scope<'s, Self>
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where
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Scope<'s, Self>: From<I>,
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{
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Scope::from(input)
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}
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}
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impl<'s> CallbackScope<Escapable> {
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pub fn new_escapable<I>(input: I) -> Scope<'s, Self>
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where
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Scope<'s, Self>: From<I>,
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{
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Scope::from(input)
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}
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}
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impl<X> CallbackScope<X> {
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pub(crate) fn get_raw_isolate_(&self) -> *mut Isolate {
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self.isolate
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}
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}
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unsafe impl<'s, X> ScopeDefinition<'s> for CallbackScope<X> {
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type Parent = ();
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type Args = *mut Isolate;
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unsafe fn enter_scope(ptr: *mut Self, isolate: Self::Args) {
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let data = Self {
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isolate,
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phantom: PhantomData,
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};
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std::ptr::write(ptr, data);
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}
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}
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impl<'s, X> From<&'s mut Isolate> for Scope<'s, CallbackScope<X>> {
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fn from(isolate: &'s mut Isolate) -> Self {
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Scope::new(isolate as *mut Isolate)
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}
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}
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impl<'s, X, T> From<Local<'s, T>> for Scope<'s, CallbackScope<X>>
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where
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Local<'s, T>: GetRawIsolate,
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{
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fn from(local: Local<'s, T>) -> Self {
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Scope::new(local.get_raw_isolate())
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}
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}
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impl<'s, X> From<&'s PromiseRejectMessage<'s>> for Scope<'s, CallbackScope<X>> {
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fn from(msg: &'s PromiseRejectMessage<'s>) -> Self {
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Self::from(msg.get_promise())
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}
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}
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/// Stack-allocated class which sets the execution context for all operations
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/// executed within a local scope.
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pub struct ContextScope<P> {
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context: ContextContainer,
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phantom: PhantomData<P>,
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}
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impl<'s, P> ContextScope<P>
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where
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P: ToLocal<'s>,
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{
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pub fn new(
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_parent: &'s mut P,
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context: Local<'s, Context>,
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) -> Scope<'s, Self> {
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Scope::new(context)
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}
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pub(crate) fn get_captured_context(&self) -> Local<'s, Context> {
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unsafe { self.context.to_local() }
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}
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}
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unsafe impl<'s, P> ScopeDefinition<'s> for ContextScope<P>
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where
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P: ToLocal<'s>,
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{
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type Parent = P;
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type Args = Local<'s, Context>;
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unsafe fn enter_scope(ptr: *mut Self, mut context: Self::Args) {
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context.enter();
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let data = Self {
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context: context.into(),
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phantom: PhantomData,
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};
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std::ptr::write(ptr, data);
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}
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}
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// TODO(piscisaureus): It should not be necessary to create an inner struct
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// to appease the drop checker.
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struct ContextContainer(*mut Context);
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impl<'s> From<Local<'s, Context>> for ContextContainer {
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fn from(mut local: Local<Context>) -> Self {
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let context = &mut *local as *mut Context;
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Self(context)
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}
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}
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impl ContextContainer {
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unsafe fn to_local<'s>(&self) -> Local<'s, Context> {
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Local::from_raw(self.0).unwrap()
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}
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}
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impl Drop for ContextContainer {
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fn drop(&mut self) {
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unsafe { self.to_local() }.exit()
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}
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}
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pub type FunctionCallbackScope<'s> = &'s mut Entered<'s, FunctionCallbackInfo>;
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pub type PropertyCallbackScope<'s> = &'s mut Entered<'s, PropertyCallbackInfo>;
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