1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
2  * vim: set ts=8 sts=4 et sw=4 tw=99:
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 jsboolinlines_h
8 #define jsboolinlines_h
9 
10 #include "jsbool.h"
11 
12 #include "vm/BooleanObject.h"
13 #include "vm/JSContext.h"
14 #include "vm/WrapperObject.h"
15 
16 namespace js {
17 
EmulatesUndefined(JSObject * obj)18 inline bool EmulatesUndefined(JSObject* obj) {
19   // This may be called off the main thread. It's OK not to expose the object
20   // here as it doesn't escape.
21   AutoUnsafeCallWithABI unsafe;
22   JSObject* actual = MOZ_LIKELY(!obj->is<WrapperObject>())
23                          ? obj
24                          : UncheckedUnwrapWithoutExpose(obj);
25   return actual->getClass()->emulatesUndefined();
26 }
27 
28 } /* namespace js */
29 
30 #endif /* jsboolinlines_h */
31