builtins-async-gen.h 3.46 KB
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// Copyright 2016 the V8 project authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

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#ifndef V8_BUILTINS_BUILTINS_ASYNC_GEN_H_
#define V8_BUILTINS_BUILTINS_ASYNC_GEN_H_
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#include "src/builtins/builtins-promise-gen.h"
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namespace v8 {
namespace internal {

class AsyncBuiltinsAssembler : public PromiseBuiltinsAssembler {
 public:
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  explicit AsyncBuiltinsAssembler(compiler::CodeAssemblerState* state)
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      : PromiseBuiltinsAssembler(state) {}

 protected:
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  // Perform steps to resume generator after `value` is resolved.
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  // `on_reject` is the SharedFunctioninfo instance used to create the reject
  // closure. `on_resolve` is the SharedFunctioninfo instance used to create the
  // resolve closure. Returns the Promise-wrapped `value`.
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  TNode<Object> Await(TNode<Context> context,
                      TNode<JSGeneratorObject> generator, TNode<Object> value,
                      TNode<JSPromise> outer_promise,
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                      TNode<SharedFunctionInfo> on_resolve_sfi,
                      TNode<SharedFunctionInfo> on_reject_sfi,
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                      TNode<Oddball> is_predicted_as_caught);
  TNode<Object> Await(TNode<Context> context,
                      TNode<JSGeneratorObject> generator, TNode<Object> value,
                      TNode<JSPromise> outer_promise,
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                      TNode<SharedFunctionInfo> on_resolve_sfi,
                      TNode<SharedFunctionInfo> on_reject_sfi,
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                      bool is_predicted_as_caught) {
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    return Await(context, generator, value, outer_promise, on_resolve_sfi,
                 on_reject_sfi, BooleanConstant(is_predicted_as_caught));
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  }
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  // Return a new built-in function object as defined in
  // Async Iterator Value Unwrap Functions
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  TNode<JSFunction> CreateUnwrapClosure(TNode<NativeContext> native_context,
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                                        TNode<Oddball> done);
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 private:
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  void InitializeNativeClosure(TNode<Context> context,
                               TNode<NativeContext> native_context,
                               TNode<HeapObject> function,
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                               TNode<SharedFunctionInfo> shared_info);
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  TNode<Context> AllocateAsyncIteratorValueUnwrapContext(
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      TNode<NativeContext> native_context, TNode<Oddball> done);
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  TNode<Object> AwaitOld(TNode<Context> context,
                         TNode<JSGeneratorObject> generator,
                         TNode<Object> value, TNode<JSPromise> outer_promise,
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                         TNode<SharedFunctionInfo> on_resolve_sfi,
                         TNode<SharedFunctionInfo> on_reject_sfi,
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                         TNode<Oddball> is_predicted_as_caught);
  TNode<Object> AwaitOptimized(TNode<Context> context,
                               TNode<JSGeneratorObject> generator,
                               TNode<JSPromise> promise,
                               TNode<JSPromise> outer_promise,
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                               TNode<SharedFunctionInfo> on_resolve_sfi,
                               TNode<SharedFunctionInfo> on_reject_sfi,
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                               TNode<Oddball> is_predicted_as_caught);
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  void InitAwaitPromise(
      Runtime::FunctionId id, TNode<Context> context, TNode<Object> value,
      TNode<Object> promise, TNode<Object> outer_promise,
      TNode<HeapObject> on_reject, TNode<Oddball> is_predicted_as_caught,
      TVariable<HeapObject>* var_throwaway);
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};

}  // namespace internal
}  // namespace v8

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#endif  // V8_BUILTINS_BUILTINS_ASYNC_GEN_H_