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.
7 * You may obtain a copy of the License at
9 * http://www.apache.org/licenses/LICENSE-2.0
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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
19 * Copyright (C) 2014 Cloudius Systems, Ltd.
22 #ifndef CEPH_MSG_DPDK_ALIGN_HH_
23 #define CEPH_MSG_DPDK_ALIGN_HH_
29 inline constexpr T align_up(T v, T align) {
30 return (v + align - 1) & ~(align - 1);
34 inline constexpr T* align_up(T* v, size_t align) {
35 static_assert(sizeof(T) == 1, "align byte pointers only");
36 return reinterpret_cast<T*>(align_up(reinterpret_cast<uintptr_t>(v), align));
40 inline constexpr T align_down(T v, T align) {
41 return v & ~(align - 1);
45 inline constexpr T* align_down(T* v, size_t align) {
46 static_assert(sizeof(T) == 1, "align byte pointers only");
47 return reinterpret_cast<T*>(align_down(reinterpret_cast<uintptr_t>(v), align));
50 #endif /* CEPH_MSG_DPDK_ALIGN_HH_ */