ceph/src/seastar/include/seastar/core/aligned_buffer.hh

   1 /*
   2  * This file is open source software, licensed to you under the terms
   3  * of the Apache License, Version 2.0 (the "License").  See the NOTICE file
   4  * distributed with this work for additional information regarding copyright
   5  * ownership.  You may not use this file except in compliance with the License.
   6  *
   7  * You may obtain a copy of the License at
   8  *
   9  *   http://www.apache.org/licenses/LICENSE-2.0
  10  *
  11  * Unless required by applicable law or agreed to in writing,
  12  * software distributed under the License is distributed on an
  13  * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
  14  * KIND, either express or implied.  See the License for the
  15  * specific language governing permissions and limitations
  16  * under the License.
  17  */
  18 /*
  19  * Copyright (C) 2016 ScyllaDB.
  20  */
  21 #pragma once
  22 #include <stdlib.h>
  23 #include <memory>
  24 #include <stdexcept>
  25
  26 namespace seastar {
  27
  28 namespace internal {
  29 void* allocate_aligned_buffer_impl(size_t size, size_t align);
  30 }
  31
  32 struct free_deleter {
  33     void operator()(void* p) { ::free(p); }
  34 };
  35
  36 template <typename CharType>
  37 inline
  38 std::unique_ptr<CharType[], free_deleter> allocate_aligned_buffer(size_t size, size_t align) {
  39     static_assert(sizeof(CharType) == 1, "must allocate byte type");
  40     void* ret = internal::allocate_aligned_buffer_impl(size, align);
  41     return std::unique_ptr<CharType[], free_deleter>(reinterpret_cast<CharType *>(ret));
  42 }
  43
  44
  45 }