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1 // Copyright 2014 The Chromium Authors. All rights reserved. | |
2 // Use of this source code is governed by a BSD-style license that can be | |
3 // found in the LICENSE file. | |
4 | |
5 #ifndef MOJO_PUBLIC_BINDINGS_LIB_CALLBACK_INTERNAL_H_ | |
6 #define MOJO_PUBLIC_BINDINGS_LIB_CALLBACK_INTERNAL_H_ | |
7 | |
8 #include "mojo/public/bindings/lib/bindings_internal.h" | |
9 | |
10 namespace mojo { | |
11 namespace internal { | |
12 | |
13 template <typename T, bool is_object_type = TypeTraits<T>::kIsObject> | |
14 struct Callback_ParamTraits {}; | |
15 | |
16 template <typename T> | |
17 struct Callback_ParamTraits<T, true> { | |
18 typedef const T& ForwardType; | |
19 static const bool kIsScopedHandle = false; | |
20 }; | |
21 | |
22 template <typename T> | |
23 struct Callback_ParamTraits<T, false> { | |
24 typedef T ForwardType; | |
25 static const bool kIsScopedHandle = false; | |
26 }; | |
27 | |
28 template <typename H> | |
29 struct Callback_ParamTraits<ScopedHandleBase<H>, true> { | |
30 typedef ScopedHandleBase<H> ForwardType; | |
31 static const bool kIsScopedHandle = true; | |
32 }; | |
33 | |
34 template<bool B, typename T = void> | |
35 struct EnableIf {}; | |
36 | |
37 template<typename T> | |
38 struct EnableIf<true, T> { typedef T type; }; | |
39 | |
40 template <typename T> | |
41 typename EnableIf<!Callback_ParamTraits<T>::kIsScopedHandle, T>::type& | |
42 Callback_Forward(T& t) { | |
43 return t; | |
44 } | |
45 | |
46 template <typename T> | |
47 typename EnableIf<Callback_ParamTraits<T>::kIsScopedHandle, T>::type | |
48 Callback_Forward(T& t) { | |
49 return t.Pass(); | |
50 } | |
51 | |
52 } // namespace internal | |
53 } // namespace mojo | |
54 | |
55 #endif // MOJO_PUBLIC_BINDINGS_LIB_CALLBACK_INTERNAL_H_ | |
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