| // Licensed to the Apache Software Foundation (ASF) under one |
| // or more contributor license agreements. See the NOTICE file |
| // distributed with this work for additional information |
| // regarding copyright ownership. The ASF licenses this file |
| // to you under the Apache License, Version 2.0 (the |
| // "License"); you may not use this file except in compliance |
| // with the License. You may obtain a copy of the License at |
| // |
| // http://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, |
| // software distributed under the License is distributed on an |
| // "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| // KIND, either express or implied. See the License for the |
| // specific language governing permissions and limitations |
| // under the License. |
| |
| #ifndef IMPALA_UTIL_ALIGNED_NEW_H_ |
| #define IMPALA_UTIL_ALIGNED_NEW_H_ |
| |
| #include <memory> |
| |
| #include "common/compiler-util.h" |
| #include "common/logging.h" |
| |
| namespace impala { |
| |
| // Objects that should be allocated, for performance or correctness reasons, at alignment |
| // greater than that promised by the global new (16) can inherit publicly from AlignedNew. |
| template <size_t ALIGNMENT> |
| struct alignas(ALIGNMENT) AlignedNew { |
| static_assert(ALIGNMENT > 0, "ALIGNMENT must be positive"); |
| static_assert((ALIGNMENT & (ALIGNMENT - 1)) == 0, "ALIGNMENT must be a power of 2"); |
| static_assert( |
| (ALIGNMENT % sizeof(void*)) == 0, "ALIGNMENT must be a multiple of sizeof(void *)"); |
| static void* operator new(std::size_t count) { return Allocate(count); } |
| static void* operator new[](std::size_t count) { return Allocate(count); } |
| static void operator delete(void* ptr) { free(ptr); } |
| static void operator delete[](void* ptr) { free(ptr); } |
| |
| private: |
| static void* Allocate(std::size_t count) { |
| void* result = nullptr; |
| const auto alloc_failed = posix_memalign(&result, ALIGNMENT, count); |
| if (alloc_failed) { |
| LOG(ERROR) << "Failed to allocate aligned memory; return code " << alloc_failed; |
| throw std::bad_alloc(); |
| } |
| DCHECK(result != nullptr); |
| return result; |
| } |
| }; |
| |
| using CacheLineAligned = AlignedNew<CACHE_LINE_SIZE>; |
| } |
| |
| #endif |