mfbt/TypedEnumBits.h@97036ab72558 (annotated)
mfbt/TypedEnumBits.h
Tue, 06 Jan 2015 21:39:09 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Tue, 06 Jan 2015 21:39:09 +0100
- branch
- TOR_BUG_9701
- changeset 8
- 97036ab72558
- permissions
- -rw-r--r--
Conditionally force memory storage according to privacy.thirdparty.isolate;
This solves Tor bug #9701, complying with disk avoidance documented in
https://www.torproject.org/projects/torbrowser/design/#disk-avoidance.
| michael@0 | 1 | /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ |
| michael@0 | 2 | /* vim: set ts=8 sts=2 et sw=2 tw=80: */ |
| michael@0 | 3 | /* This Source Code Form is subject to the terms of the Mozilla Public |
| michael@0 | 4 | * License, v. 2.0. If a copy of the MPL was not distributed with this |
| michael@0 | 5 | * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ |
| michael@0 | 6 | |
| michael@0 | 7 | /* MOZ_MAKE_ENUM_CLASS_BITWISE_OPERATORS allows using a typed enum as bit flags. */ |
| michael@0 | 8 | |
| michael@0 | 9 | #ifndef mozilla_TypedEnumBits_h |
| michael@0 | 10 | #define mozilla_TypedEnumBits_h |
| michael@0 | 11 | |
| michael@0 | 12 | #include "mozilla/IntegerTypeTraits.h" |
| michael@0 | 13 | #include "mozilla/TypedEnumInternal.h" |
| michael@0 | 14 | |
| michael@0 | 15 | namespace mozilla { |
| michael@0 | 16 | |
| michael@0 | 17 | #define MOZ_CASTABLETYPEDENUMRESULT_BINOP(Op, OtherType, ReturnType) \ |
| michael@0 | 18 | template<typename E> \ |
| michael@0 | 19 | MOZ_CONSTEXPR ReturnType \ |
| michael@0 | 20 | operator Op(const OtherType& e, const CastableTypedEnumResult<E>& r) \ |
| michael@0 | 21 | { \ |
| michael@0 | 22 | return ReturnType(e Op OtherType(r)); \ |
| michael@0 | 23 | } \ |
| michael@0 | 24 | template<typename E> \ |
| michael@0 | 25 | MOZ_CONSTEXPR ReturnType \ |
| michael@0 | 26 | operator Op(const CastableTypedEnumResult<E>& r, const OtherType& e) \ |
| michael@0 | 27 | { \ |
| michael@0 | 28 | return ReturnType(OtherType(r) Op e); \ |
| michael@0 | 29 | } \ |
| michael@0 | 30 | template<typename E> \ |
| michael@0 | 31 | MOZ_CONSTEXPR ReturnType \ |
| michael@0 | 32 | operator Op(const CastableTypedEnumResult<E>& r1, \ |
| michael@0 | 33 | const CastableTypedEnumResult<E>& r2) \ |
| michael@0 | 34 | { \ |
| michael@0 | 35 | return ReturnType(OtherType(r1) Op OtherType(r2)); \ |
| michael@0 | 36 | } |
| michael@0 | 37 | |
| michael@0 | 38 | MOZ_CASTABLETYPEDENUMRESULT_BINOP(|, E, CastableTypedEnumResult<E>) |
| michael@0 | 39 | MOZ_CASTABLETYPEDENUMRESULT_BINOP(&, E, CastableTypedEnumResult<E>) |
| michael@0 | 40 | MOZ_CASTABLETYPEDENUMRESULT_BINOP(^, E, CastableTypedEnumResult<E>) |
| michael@0 | 41 | MOZ_CASTABLETYPEDENUMRESULT_BINOP(==, E, bool) |
| michael@0 | 42 | MOZ_CASTABLETYPEDENUMRESULT_BINOP(!=, E, bool) |
| michael@0 | 43 | MOZ_CASTABLETYPEDENUMRESULT_BINOP(||, bool, bool) |
| michael@0 | 44 | MOZ_CASTABLETYPEDENUMRESULT_BINOP(&&, bool, bool) |
| michael@0 | 45 | |
| michael@0 | 46 | template <typename E> |
| michael@0 | 47 | MOZ_CONSTEXPR CastableTypedEnumResult<E> |
| michael@0 | 48 | operator ~(const CastableTypedEnumResult<E>& r) |
| michael@0 | 49 | { |
| michael@0 | 50 | return CastableTypedEnumResult<E>(~(E(r))); |
| michael@0 | 51 | } |
| michael@0 | 52 | |
| michael@0 | 53 | #define MOZ_CASTABLETYPEDENUMRESULT_COMPOUND_ASSIGN_OP(Op) \ |
| michael@0 | 54 | template<typename E> \ |
| michael@0 | 55 | E& \ |
| michael@0 | 56 | operator Op(E& r1, \ |
| michael@0 | 57 | const CastableTypedEnumResult<E>& r2) \ |
| michael@0 | 58 | { \ |
| michael@0 | 59 | return r1 Op E(r2); \ |
| michael@0 | 60 | } |
| michael@0 | 61 | |
| michael@0 | 62 | MOZ_CASTABLETYPEDENUMRESULT_COMPOUND_ASSIGN_OP(&=) |
| michael@0 | 63 | MOZ_CASTABLETYPEDENUMRESULT_COMPOUND_ASSIGN_OP(|=) |
| michael@0 | 64 | MOZ_CASTABLETYPEDENUMRESULT_COMPOUND_ASSIGN_OP(^=) |
| michael@0 | 65 | |
| michael@0 | 66 | #undef MOZ_CASTABLETYPEDENUMRESULT_COMPOUND_ASSIGN_OP |
| michael@0 | 67 | |
| michael@0 | 68 | #undef MOZ_CASTABLETYPEDENUMRESULT_BINOP |
| michael@0 | 69 | |
| michael@0 | 70 | #ifndef MOZ_HAVE_CXX11_STRONG_ENUMS |
| michael@0 | 71 | |
| michael@0 | 72 | #define MOZ_CASTABLETYPEDENUMRESULT_BINOP_EXTRA_NON_CXX11(Op, ReturnType) \ |
| michael@0 | 73 | template<typename E> \ |
| michael@0 | 74 | MOZ_CONSTEXPR ReturnType \ |
| michael@0 | 75 | operator Op(typename E::Enum e, const CastableTypedEnumResult<E>& r) \ |
| michael@0 | 76 | { \ |
| michael@0 | 77 | return ReturnType(e Op E(r)); \ |
| michael@0 | 78 | } \ |
| michael@0 | 79 | template<typename E> \ |
| michael@0 | 80 | MOZ_CONSTEXPR ReturnType \ |
| michael@0 | 81 | operator Op(const CastableTypedEnumResult<E>& r, typename E::Enum e) \ |
| michael@0 | 82 | { \ |
| michael@0 | 83 | return ReturnType(E(r) Op e); \ |
| michael@0 | 84 | } |
| michael@0 | 85 | |
| michael@0 | 86 | MOZ_CASTABLETYPEDENUMRESULT_BINOP_EXTRA_NON_CXX11(|, CastableTypedEnumResult<E>) |
| michael@0 | 87 | MOZ_CASTABLETYPEDENUMRESULT_BINOP_EXTRA_NON_CXX11(&, CastableTypedEnumResult<E>) |
| michael@0 | 88 | MOZ_CASTABLETYPEDENUMRESULT_BINOP_EXTRA_NON_CXX11(^, CastableTypedEnumResult<E>) |
| michael@0 | 89 | MOZ_CASTABLETYPEDENUMRESULT_BINOP_EXTRA_NON_CXX11(==, bool) |
| michael@0 | 90 | MOZ_CASTABLETYPEDENUMRESULT_BINOP_EXTRA_NON_CXX11(!=, bool) |
| michael@0 | 91 | |
| michael@0 | 92 | #undef MOZ_CASTABLETYPEDENUMRESULT_BINOP_EXTRA_NON_CXX11 |
| michael@0 | 93 | |
| michael@0 | 94 | #endif // not MOZ_HAVE_CXX11_STRONG_ENUMS |
| michael@0 | 95 | |
| michael@0 | 96 | namespace detail { |
| michael@0 | 97 | template<typename E> |
| michael@0 | 98 | struct UnsignedIntegerTypeForEnum |
| michael@0 | 99 | : UnsignedStdintTypeForSize<sizeof(E)> |
| michael@0 | 100 | {}; |
| michael@0 | 101 | } |
| michael@0 | 102 | |
| michael@0 | 103 | } // namespace mozilla |
| michael@0 | 104 | |
| michael@0 | 105 | #define MOZ_MAKE_ENUM_CLASS_BINOP_IMPL(Name, Op) \ |
| michael@0 | 106 | inline MOZ_CONSTEXPR mozilla::CastableTypedEnumResult<Name> \ |
| michael@0 | 107 | operator Op(Name a, Name b) \ |
| michael@0 | 108 | { \ |
| michael@0 | 109 | typedef mozilla::CastableTypedEnumResult<Name> Result; \ |
| michael@0 | 110 | typedef mozilla::detail::UnsignedIntegerTypeForEnum<Name>::Type U; \ |
| michael@0 | 111 | return Result(Name(U(a) Op U(b))); \ |
| michael@0 | 112 | } \ |
| michael@0 | 113 | \ |
| michael@0 | 114 | inline Name& \ |
| michael@0 | 115 | operator Op##=(Name& a, Name b) \ |
| michael@0 | 116 | { \ |
| michael@0 | 117 | return a = a Op b; \ |
| michael@0 | 118 | } |
| michael@0 | 119 | |
| michael@0 | 120 | #define MOZ_MAKE_ENUM_CLASS_OPS_IMPL(Name) \ |
| michael@0 | 121 | MOZ_MAKE_ENUM_CLASS_BINOP_IMPL(Name, |) \ |
| michael@0 | 122 | MOZ_MAKE_ENUM_CLASS_BINOP_IMPL(Name, &) \ |
| michael@0 | 123 | MOZ_MAKE_ENUM_CLASS_BINOP_IMPL(Name, ^) \ |
| michael@0 | 124 | inline MOZ_CONSTEXPR mozilla::CastableTypedEnumResult<Name> \ |
| michael@0 | 125 | operator~(Name a) \ |
| michael@0 | 126 | { \ |
| michael@0 | 127 | typedef mozilla::CastableTypedEnumResult<Name> Result; \ |
| michael@0 | 128 | typedef mozilla::detail::UnsignedIntegerTypeForEnum<Name>::Type U; \ |
| michael@0 | 129 | return Result(Name(~(U(a)))); \ |
| michael@0 | 130 | } |
| michael@0 | 131 | |
| michael@0 | 132 | #ifndef MOZ_HAVE_CXX11_STRONG_ENUMS |
| michael@0 | 133 | # define MOZ_MAKE_ENUM_CLASS_BITWISE_BINOP_EXTRA_NON_CXX11(Name, Op) \ |
| michael@0 | 134 | inline MOZ_CONSTEXPR mozilla::CastableTypedEnumResult<Name> \ |
| michael@0 | 135 | operator Op(Name a, Name::Enum b) \ |
| michael@0 | 136 | { \ |
| michael@0 | 137 | return a Op Name(b); \ |
| michael@0 | 138 | } \ |
| michael@0 | 139 | \ |
| michael@0 | 140 | inline MOZ_CONSTEXPR mozilla::CastableTypedEnumResult<Name> \ |
| michael@0 | 141 | operator Op(Name::Enum a, Name b) \ |
| michael@0 | 142 | { \ |
| michael@0 | 143 | return Name(a) Op b; \ |
| michael@0 | 144 | } \ |
| michael@0 | 145 | \ |
| michael@0 | 146 | inline MOZ_CONSTEXPR mozilla::CastableTypedEnumResult<Name> \ |
| michael@0 | 147 | operator Op(Name::Enum a, Name::Enum b) \ |
| michael@0 | 148 | { \ |
| michael@0 | 149 | return Name(a) Op Name(b); \ |
| michael@0 | 150 | } \ |
| michael@0 | 151 | \ |
| michael@0 | 152 | inline Name& \ |
| michael@0 | 153 | operator Op##=(Name& a, Name::Enum b) \ |
| michael@0 | 154 | { \ |
| michael@0 | 155 | return a = a Op Name(b); \ |
| michael@0 | 156 | } |
| michael@0 | 157 | |
| michael@0 | 158 | # define MOZ_MAKE_ENUM_CLASS_OPS_EXTRA_NON_CXX11(Name) \ |
| michael@0 | 159 | MOZ_MAKE_ENUM_CLASS_BITWISE_BINOP_EXTRA_NON_CXX11(Name, |) \ |
| michael@0 | 160 | MOZ_MAKE_ENUM_CLASS_BITWISE_BINOP_EXTRA_NON_CXX11(Name, &) \ |
| michael@0 | 161 | MOZ_MAKE_ENUM_CLASS_BITWISE_BINOP_EXTRA_NON_CXX11(Name, ^) \ |
| michael@0 | 162 | inline MOZ_CONSTEXPR mozilla::CastableTypedEnumResult<Name> \ |
| michael@0 | 163 | operator~(Name::Enum a) \ |
| michael@0 | 164 | { \ |
| michael@0 | 165 | return ~(Name(a)); \ |
| michael@0 | 166 | } |
| michael@0 | 167 | #endif |
| michael@0 | 168 | |
| michael@0 | 169 | /** |
| michael@0 | 170 | * MOZ_MAKE_ENUM_CLASS_BITWISE_OPERATORS generates standard bitwise operators |
| michael@0 | 171 | * for the given enum type. Use this to enable using an enum type as bit-field. |
| michael@0 | 172 | */ |
| michael@0 | 173 | #ifdef MOZ_HAVE_CXX11_STRONG_ENUMS |
| michael@0 | 174 | # define MOZ_MAKE_ENUM_CLASS_BITWISE_OPERATORS(Name) \ |
| michael@0 | 175 | MOZ_MAKE_ENUM_CLASS_OPS_IMPL(Name) |
| michael@0 | 176 | #else |
| michael@0 | 177 | # define MOZ_MAKE_ENUM_CLASS_BITWISE_OPERATORS(Name) \ |
| michael@0 | 178 | MOZ_MAKE_ENUM_CLASS_OPS_IMPL(Name) \ |
| michael@0 | 179 | MOZ_MAKE_ENUM_CLASS_OPS_EXTRA_NON_CXX11(Name) |
| michael@0 | 180 | #endif |
| michael@0 | 181 | |
| michael@0 | 182 | #endif // mozilla_TypedEnumBits_h |
