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1 /* | 1 /* |
2 * Copyright (C) 2014 Google Inc. All rights reserved. | 2 * Copyright (C) 2014 Google Inc. All rights reserved. |
3 * | 3 * |
4 * Redistribution and use in source and binary forms, with or without | 4 * Redistribution and use in source and binary forms, with or without |
5 * modification, are permitted provided that the following conditions are | 5 * modification, are permitted provided that the following conditions are |
6 * met: | 6 * met: |
7 * | 7 * |
8 * * Redistributions of source code must retain the above copyright | 8 * * Redistributions of source code must retain the above copyright |
9 * notice, this list of conditions and the following disclaimer. | 9 * notice, this list of conditions and the following disclaimer. |
10 * * Redistributions in binary form must reproduce the above | 10 * * Redistributions in binary form must reproduce the above |
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39 #include "wtf/HashFunctions.h" | 39 #include "wtf/HashFunctions.h" |
40 #include "wtf/Locker.h" | 40 #include "wtf/Locker.h" |
41 #include "wtf/RawPtr.h" | 41 #include "wtf/RawPtr.h" |
42 #include "wtf/RefCounted.h" | 42 #include "wtf/RefCounted.h" |
43 #include "wtf/TypeTraits.h" | 43 #include "wtf/TypeTraits.h" |
44 | 44 |
45 namespace blink { | 45 namespace blink { |
46 | 46 |
47 template<typename T> class HeapTerminatedArray; | 47 template<typename T> class HeapTerminatedArray; |
48 | 48 |
49 // Template to determine if a class is a GarbageCollectedMixin by checking if it | |
50 // has IsGarbageCollectedMixinMarker | |
51 template<typename T> | |
52 struct IsGarbageCollectedMixin { | |
53 private: | |
54 typedef char YesType; | |
55 struct NoType { | |
56 char padding[8]; | |
57 }; | |
58 | |
59 template <typename U> static YesType checkMarker(typename U::IsGarbageCollec
tedMixinMarker*); | |
60 template <typename U> static NoType checkMarker(...); | |
61 | |
62 public: | |
63 static const bool value = sizeof(checkMarker<T>(nullptr)) == sizeof(YesType)
; | |
64 }; | |
65 | |
66 template <typename T> | 49 template <typename T> |
67 struct IsGarbageCollectedType { | 50 struct IsGarbageCollectedType { |
68 using TrueType = char; | 51 using TrueType = char; |
69 struct FalseType { | 52 struct FalseType { |
70 char dummy[2]; | 53 char dummy[2]; |
71 }; | 54 }; |
72 | 55 |
73 using NonConstType = typename WTF::RemoveConst<T>::Type; | 56 using NonConstType = typename WTF::RemoveConst<T>::Type; |
74 using GarbageCollectedSubclass = WTF::IsSubclassOfTemplate<NonConstType, Gar
bageCollected>; | 57 using GarbageCollectedSubclass = WTF::IsSubclassOfTemplate<NonConstType, Gar
bageCollected>; |
75 using GarbageCollectedMixinSubclass = IsGarbageCollectedMixin<NonConstType>; | 58 using GarbageCollectedMixinSubclass = IsGarbageCollectedMixin<NonConstType>; |
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1177 template<typename T> | 1160 template<typename T> |
1178 struct ParamStorageTraits<RawPtr<T>> : public PointerParamStorageTraits<T*, blin
k::IsGarbageCollectedType<T>::value> { | 1161 struct ParamStorageTraits<RawPtr<T>> : public PointerParamStorageTraits<T*, blin
k::IsGarbageCollectedType<T>::value> { |
1179 }; | 1162 }; |
1180 | 1163 |
1181 template<typename T> | 1164 template<typename T> |
1182 PassRefPtr<T> adoptRef(blink::RefCountedGarbageCollected<T>*) = delete; | 1165 PassRefPtr<T> adoptRef(blink::RefCountedGarbageCollected<T>*) = delete; |
1183 | 1166 |
1184 } // namespace WTF | 1167 } // namespace WTF |
1185 | 1168 |
1186 #endif | 1169 #endif |
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