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/*
* This file is open source software, licensed to you under the terms
* of the Apache License, Version 2.0 (the "License"). See the NOTICE file
* distributed with this work for additional information regarding copyright
* ownership. 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.
*/
/*
* Copyright (C) 2014 Cloudius Systems, Ltd.
*/
#pragma once
#include <cstdint>
#include <cstdlib>
namespace seastar {
template <typename T>
inline constexpr
T align_up(T v, T align) {
return (v + align - 1) & ~(align - 1);
}
template <typename T>
inline constexpr
T* align_up(T* v, size_t align) {
static_assert(sizeof(T) == 1, "align byte pointers only");
return reinterpret_cast<T*>(align_up(reinterpret_cast<uintptr_t>(v), align));
}
template <typename T>
inline constexpr
T align_down(T v, T align) {
return v & ~(align - 1);
}
template <typename T>
inline constexpr
T* align_down(T* v, size_t align) {
static_assert(sizeof(T) == 1, "align byte pointers only");
return reinterpret_cast<T*>(align_down(reinterpret_cast<uintptr_t>(v), align));
}
}
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