1 files changed, 56 insertions, 0 deletions
diff --git a/js/src/vm/JSAtomState.h b/js/src/vm/JSAtomState.h
new file mode 100644
index 0000000000..83cc36ead6
--- /dev/null
+++ b/js/src/vm/JSAtomState.h
@@ -0,0 +1,56 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*-
+ * vim: set ts=8 sts=2 et sw=2 tw=80:
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#ifndef vm_JSAtomState_h
+#define vm_JSAtomState_h
+
+#include "gc/Barrier.h"
+#include "gc/Rooting.h"
+#include "js/ProtoKey.h"
+#include "js/Symbol.h"
+#include "vm/CommonPropertyNames.h"
+
+/* Various built-in or commonly-used names pinned on first context. */
+struct JSAtomState {
+#define PROPERTYNAME_FIELD(idpart, id, text) js::ImmutablePropertyNamePtr id;
+  FOR_EACH_COMMON_PROPERTYNAME(PROPERTYNAME_FIELD)
+#undef PROPERTYNAME_FIELD
+#define PROPERTYNAME_FIELD(name, clasp) js::ImmutablePropertyNamePtr name;
+  JS_FOR_EACH_PROTOTYPE(PROPERTYNAME_FIELD)
+#undef PROPERTYNAME_FIELD
+#define PROPERTYNAME_FIELD(name) js::ImmutablePropertyNamePtr name;
+  JS_FOR_EACH_WELL_KNOWN_SYMBOL(PROPERTYNAME_FIELD)
+#undef PROPERTYNAME_FIELD
+#define PROPERTYNAME_FIELD(name) js::ImmutablePropertyNamePtr Symbol_##name;
+  JS_FOR_EACH_WELL_KNOWN_SYMBOL(PROPERTYNAME_FIELD)
+#undef PROPERTYNAME_FIELD
+
+  js::ImmutablePropertyNamePtr* wellKnownSymbolNames() {
+#define FIRST_PROPERTYNAME_FIELD(name) return &name;
+    JS_FOR_EACH_WELL_KNOWN_SYMBOL(FIRST_PROPERTYNAME_FIELD)
+#undef FIRST_PROPERTYNAME_FIELD
+  }
+
+  js::ImmutablePropertyNamePtr* wellKnownSymbolDescriptions() {
+#define FIRST_PROPERTYNAME_FIELD(name) return &Symbol_##name;
+    JS_FOR_EACH_WELL_KNOWN_SYMBOL(FIRST_PROPERTYNAME_FIELD)
+#undef FIRST_PROPERTYNAME_FIELD
+  }
+};
+
+namespace js {
+
+#define NAME_OFFSET(name) offsetof(JSAtomState, name)
+
+inline HandlePropertyName AtomStateOffsetToName(const JSAtomState& atomState,
+                                                size_t offset) {
+  return *reinterpret_cast<js::ImmutablePropertyNamePtr*>((char*)&atomState +
+                                                          offset);
+}
+
+} /* namespace js */
+
+#endif /* vm_JSAtomState_h */