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8fe9b8a4cc
Implements `Result` in fast-calls. Note that the approach here is slightly different. Rather than store the last result in the `OpState`, we put it into the `OpCtx` which saves us a lookup and lock in the error case. We do not have to lock this field as it's guaranteed only one runtime and thread can ever access it. The fastcall path for many ops can avoid doing a great deal of work, even for `Result` return values. In the previous iteration of `ops`, all `Result`-returning functions would fetch and lock the `OpState`, regardless of whether it was used or not.
94 lines
3.5 KiB
Text
94 lines
3.5 KiB
Text
#[allow(non_camel_case_types)]
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pub struct op_void_with_result {}
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impl op_void_with_result {
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pub const fn name() -> &'static str {
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stringify!(op_void_with_result)
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}
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pub const fn decl() -> deno_core::_ops::OpDecl {
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deno_core::_ops::OpDecl {
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name: stringify!(op_void_with_result),
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v8_fn_ptr: Self::slow_function as _,
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enabled: true,
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fast_fn: Some({
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use deno_core::v8::fast_api::Type;
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use deno_core::v8::fast_api::CType;
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deno_core::v8::fast_api::FastFunction::new(
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&[Type::V8Value, Type::CallbackOptions],
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CType::Void,
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Self::fast_function as *const ::std::ffi::c_void,
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)
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}),
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is_async: false,
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is_unstable: false,
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is_v8: false,
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arg_count: 0usize as u8,
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}
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}
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pub extern "C" fn slow_function(info: *const deno_core::v8::FunctionCallbackInfo) {
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let args = deno_core::v8::FunctionCallbackArguments::from_function_callback_info(unsafe {
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&*info
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});
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let opctx = unsafe {
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&*(deno_core::v8::Local::<deno_core::v8::External>::cast(args.data()).value()
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as *const deno_core::_ops::OpCtx)
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};
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if let Some(err) = unsafe { opctx.unsafely_take_last_error_for_ops_only() } {
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let scope = &mut unsafe { deno_core::v8::CallbackScope::new(&*info) };
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let args = deno_core::v8::FunctionCallbackArguments::from_function_callback_info(unsafe {
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&*info
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});
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let opstate = ::std::cell::RefCell::borrow(&*opctx.state);
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let exception = deno_core::error::to_v8_error(
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scope,
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opstate.get_error_class_fn,
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&err,
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);
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scope.throw_exception(exception);
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return;
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}
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let result = Self::call();
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match result {
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Ok(result) => {}
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Err(err) => {
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let scope = &mut unsafe { deno_core::v8::CallbackScope::new(&*info) };
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let args = deno_core::v8::FunctionCallbackArguments::from_function_callback_info(unsafe {
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&*info
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});
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let opstate = ::std::cell::RefCell::borrow(&*opctx.state);
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let exception = deno_core::error::to_v8_error(
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scope,
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opstate.get_error_class_fn,
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&err,
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);
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scope.throw_exception(exception);
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return;
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}
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};
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}
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fn fast_function(
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_: deno_core::v8::Local<deno_core::v8::Object>,
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fast_api_callback_options: *mut deno_core::v8::fast_api::FastApiCallbackOptions,
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) -> () {
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let fast_api_callback_options = unsafe { &mut *fast_api_callback_options };
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let opctx = unsafe {
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&*(deno_core::v8::Local::<
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v8::External,
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>::cast(unsafe { fast_api_callback_options.data.data })
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.value() as *const deno_core::_ops::OpCtx)
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};
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let result = Self::call();
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let result = match result {
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Ok(result) => result,
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Err(err) => {
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unsafe {
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opctx.unsafely_set_last_error_for_ops_only(err);
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}
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fast_api_callback_options.fallback = true;
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return ::std::default::Default::default();
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}
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};
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result
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}
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#[inline(always)]
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pub fn call() -> Result<(), AnyError> {}
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}
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