1 /* 2 * Copyright (C) 2010 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 _BIONIC_MACROS_H_ 18 #define _BIONIC_MACROS_H_ 19 20 // DISALLOW_COPY_AND_ASSIGN disallows the copy and operator= functions. 21 // It goes in the private: declarations in a class. 22 #define DISALLOW_COPY_AND_ASSIGN(TypeName) \ 23 TypeName(const TypeName&) = delete; \ 24 void operator=(const TypeName&) = delete 25 26 // A macro to disallow all the implicit constructors, namely the 27 // default constructor, copy constructor and operator= functions. 28 // 29 // This should be used in the private: declarations for a class 30 // that wants to prevent anyone from instantiating it. This is 31 // especially useful for classes containing only static methods. 32 #define DISALLOW_IMPLICIT_CONSTRUCTORS(TypeName) \ 33 TypeName() = delete; \ 34 DISALLOW_COPY_AND_ASSIGN(TypeName) 35 36 #define BIONIC_ALIGN(value, alignment) \ 37 (((value) + (alignment) - 1) & ~((alignment) - 1)) 38 39 #define BIONIC_ROUND_UP_POWER_OF_2(value) \ 40 (sizeof(value) == 8) \ 41 ? (1UL << (64 - __builtin_clzl(static_cast<unsigned long>(value)))) \ 42 : (1UL << (32 - __builtin_clz(static_cast<unsigned int>(value)))) 43 44 #endif // _BIONIC_MACROS_H_ 45
