1 /* 2 * Copyright (C) 2018 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #ifndef android_hardware_audio_common_VersionUtils_H_ 18 #define android_hardware_audio_common_VersionUtils_H_ 19 20 #include <hidl/HidlSupport.h> 21 #include <type_traits> 22 23 namespace android { 24 namespace hardware { 25 namespace audio { 26 namespace common { 27 namespace utils { 28 29 /** Converting between a bitfield or itself. */ 30 template <class Enum> 31 class EnumBitfield { 32 public: 33 using Bitfield = ::android::hardware::hidl_bitfield<Enum>; 34 35 EnumBitfield(const EnumBitfield&) = default; EnumBitfield(Enum value)36 explicit EnumBitfield(Enum value) : mValue(value) {} EnumBitfield(Bitfield value)37 explicit EnumBitfield(Bitfield value) : EnumBitfield(static_cast<Enum>(value)) {} 38 39 EnumBitfield& operator=(const EnumBitfield&) = default; 40 EnumBitfield& operator=(Enum value) { return *this = EnumBitfield{value}; } 41 EnumBitfield& operator=(Bitfield value) { return *this = EnumBitfield{value}; } 42 Enum()43 operator Enum() const { return mValue; } Bitfield()44 operator Bitfield() const { return static_cast<Bitfield>(mValue); } 45 46 private: 47 Enum mValue; 48 }; 49 50 /** ATD way to create a EnumBitfield. */ 51 template <class Enum> mkEnumBitfield(Enum value)52EnumBitfield<Enum> mkEnumBitfield(Enum value) { 53 return EnumBitfield<Enum>{value}; 54 } 55 56 } // namespace utils 57 } // namespace common 58 } // namespace audio 59 } // namespace hardware 60 } // namespace android 61 62 #endif // android_hardware_audio_common_VersionUtils_H_ 63