webkitgtk-2.16.5HEADwebkitgtk-2.16.5master

1 files changed, 113 insertions, 0 deletions

diff --git a/Source/JavaScriptCore/runtime/JSModuleNamespaceObject.h b/Source/JavaScriptCore/runtime/JSModuleNamespaceObject.h
new file mode 100644
index 000000000..fb8ed3738
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+++ b/Source/JavaScriptCore/runtime/JSModuleNamespaceObject.h
@@ -0,0 +1,113 @@
+/*
+ * Copyright (C) 2015 Apple Inc. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE INC. OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
+ * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#pragma once
+
+#include "AbstractModuleRecord.h"
+#include "JSDestructibleObject.h"
+#include "ScopeOffset.h"
+
+namespace JSC {
+
+class JSModuleNamespaceObject final : public JSDestructibleObject {
+public:
+    typedef JSDestructibleObject Base;
+    static const unsigned StructureFlags = Base::StructureFlags | OverridesGetOwnPropertySlot | InterceptsGetOwnPropertySlotByIndexEvenWhenLengthIsNotZero | OverridesGetPropertyNames | GetOwnPropertySlotIsImpureForPropertyAbsence | IsImmutablePrototypeExoticObject;
+
+    static JSModuleNamespaceObject* create(ExecState* exec, JSGlobalObject* globalObject, Structure* structure, AbstractModuleRecord* moduleRecord, Vector<std::pair<Identifier, AbstractModuleRecord::Resolution>>&& resolutions)
+    {
+        JSModuleNamespaceObject* object =
+            new (
+                NotNull,
+                allocateCell<JSModuleNamespaceObject>(exec->vm().heap, JSModuleNamespaceObject::allocationSize(resolutions.size())))
+            JSModuleNamespaceObject(exec->vm(), structure);
+        object->finishCreation(exec, globalObject, moduleRecord, WTFMove(resolutions));
+        return object;
+    }
+
+    JS_EXPORT_PRIVATE static bool getOwnPropertySlot(JSObject*, ExecState*, PropertyName, PropertySlot&);
+    JS_EXPORT_PRIVATE static bool put(JSCell*, ExecState*, PropertyName, JSValue, PutPropertySlot&);
+    JS_EXPORT_PRIVATE static bool putByIndex(JSCell*, ExecState*, unsigned propertyName, JSValue, bool shouldThrow);
+    JS_EXPORT_PRIVATE static bool deleteProperty(JSCell*, ExecState*, PropertyName);
+    JS_EXPORT_PRIVATE static void getOwnPropertyNames(JSObject*, ExecState*, PropertyNameArray&, EnumerationMode);
+    JS_EXPORT_PRIVATE static bool defineOwnProperty(JSObject*, ExecState*, PropertyName, const PropertyDescriptor&, bool shouldThrow);
+
+    DECLARE_EXPORT_INFO;
+
+    static Structure* createStructure(VM& vm, JSGlobalObject* globalObject, JSValue prototype)
+    {
+        return Structure::create(vm, globalObject, prototype, TypeInfo(ObjectType, StructureFlags), info());
+    }
+
+    AbstractModuleRecord* moduleRecord() { return m_moduleRecord.get(); }
+
+protected:
+    JS_EXPORT_PRIVATE void finishCreation(ExecState*, JSGlobalObject*, AbstractModuleRecord*, Vector<std::pair<Identifier, AbstractModuleRecord::Resolution>>&&);
+    JS_EXPORT_PRIVATE JSModuleNamespaceObject(VM&, Structure*);
+
+private:
+    static void destroy(JSCell*);
+    static void visitChildren(JSCell*, SlotVisitor&);
+
+    WriteBarrierBase<AbstractModuleRecord>& moduleRecordAt(unsigned offset)
+    {
+        return moduleRecords()[offset];
+    }
+
+    WriteBarrierBase<AbstractModuleRecord>* moduleRecords()
+    {
+        return bitwise_cast<WriteBarrierBase<AbstractModuleRecord>*>(bitwise_cast<char*>(this) + offsetOfModuleRecords());
+    }
+
+    static size_t offsetOfModuleRecords()
+    {
+        return WTF::roundUpToMultipleOf<sizeof(WriteBarrier<AbstractModuleRecord>)>(sizeof(JSModuleNamespaceObject));
+    }
+
+    static size_t allocationSize(unsigned moduleRecords)
+    {
+        return offsetOfModuleRecords() + moduleRecords * sizeof(WriteBarrier<AbstractModuleRecord>);
+    }
+
+    struct ExportEntry {
+        Identifier localName;
+        unsigned moduleRecordOffset;
+    };
+
+    typedef HashMap<RefPtr<UniquedStringImpl>, ExportEntry, IdentifierRepHash, HashTraits<RefPtr<UniquedStringImpl>>> ExportMap;
+
+    ExportMap m_exports;
+    Vector<Identifier> m_names;
+    WriteBarrier<AbstractModuleRecord> m_moduleRecord;
+};
+
+inline bool isJSModuleNamespaceObject(JSCell* cell)
+{
+    return cell->classInfo(*cell->vm()) == JSModuleNamespaceObject::info();
+}
+
+inline bool isJSModuleNamespaceObject(JSValue v) { return v.isCell() && isJSModuleNamespaceObject(v.asCell()); }
+
+} // namespace JSC