1 /* 2 * Copyright (C) 2017 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 CHRE_UTIL_MEMORY_H_ 18 #define CHRE_UTIL_MEMORY_H_ 19 20 #include <cstddef> 21 22 namespace chre { 23 24 /** 25 * Destroys count objects starting at first. This function is similar to 26 * std::destroy_n. 27 * 28 * @param first Starting address of count objects to destroy 29 * @param count The number of objects to destroy 30 */ 31 template<typename ElementType> 32 void destroy(ElementType *first, size_t count); 33 34 /** 35 * Performs move assignment (dest = std::move(source)) if supported by 36 * ElementType, otherwise copy assignment (dest = source). 37 */ 38 template<typename ElementType> 39 void moveOrCopyAssign(ElementType& dest, ElementType& source); 40 41 /** 42 * Initializes a new block of memory by transferring objects from another block, 43 * using memcpy if valid for the underlying type, or the move constructor if 44 * available, or the copy constructor. This function is similar to 45 * std::uninitialized_move_n. 46 * 47 * @param source The beginning of the data to transfer 48 * @param count The number of elements to transfer 49 * @param dest An uninitialized buffer to be populated with count elements 50 */ 51 template<typename ElementType> 52 void uninitializedMoveOrCopy(ElementType *source, size_t count, 53 ElementType *dest); 54 55 /** 56 * Allocates memory for an object of size T and constructs the object in the 57 * newly allocated object by forwarding the provided parameters. 58 */ 59 template<typename T, typename... Args> 60 T *memoryAlloc(Args&&... args); 61 62 } // namespace chre 63 64 #include "chre/util/memory_impl.h" 65 66 #endif // CHRE_UTIL_MEMORY_H 67