js/src/builtin/WrappedFunctionObject.h

   1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*-
   2  * vim: set ts=8 sts=2 et sw=2 tw=80:
   3  * This Source Code Form is subject to the terms of the Mozilla Public
   4  * License, v. 2.0. If a copy of the MPL was not distributed with this
   5  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
   6
   7 #ifndef builtin_WrappedFunctionObject_h
   8 #define builtin_WrappedFunctionObject_h
   9
  10 #include "js/Value.h"
  11 #include "vm/NativeObject.h"
  12
  13 namespace js {
  14
  15 // Implementing Wrapped Function Exotic Objects from the ShadowRealms proposal
  16 // https://tc39.es/proposal-shadowrealm/#sec-wrapped-function-exotic-objects
  17 //
  18 // These are produced as callables are passed across ShadowRealm boundaries,
  19 // preventing functions from piercing the shadow realm barrier.
  20 class WrappedFunctionObject : public NativeObject {
  21  public:
  22   static const JSClass class_;
  23
  24   enum { WrappedTargetFunctionSlot, SlotCount };
  25
  26   JSObject* getTargetFunction() const {
  27     return &getFixedSlot(WrappedTargetFunctionSlot).toObject();
  28   }
  29
  30   void setTargetFunction(JSObject& obj) {
  31     setFixedSlot(WrappedTargetFunctionSlot, ObjectValue(obj));
  32   }
  33 };
  34
  35 bool WrappedFunctionCreate(JSContext* cx, Realm* callerRealm,
  36                            Handle<JSObject*> target, MutableHandle<Value> res);
  37
  38 bool GetWrappedValue(JSContext* cx, Realm* callerRealm, Handle<Value> value,
  39                      MutableHandle<Value> res);
  40
  41 }  // namespace js
  42
  43 #endif