libcruft-util/pointer.hpp

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/*
* Licensed 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.
*
* Copyright 2011 Danny Robson <danny@nerdcruft.net>
*/
#ifndef __POINTER_HPP
#define __POINTER_HPP
#include <cstddef>
#include <cstdint>
namespace util {
///////////////////////////////////////////////////////////////////////////
template <typename T>
T*
align (T *_ptr, size_t alignment)
{
auto ptr = reinterpret_cast<uintptr_t> (_ptr);
if (ptr % alignment)
ptr += alignment - ptr % alignment;
return reinterpret_cast<T*> (ptr);
}
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//-------------------------------------------------------------------------
inline uintptr_t
align (uintptr_t ptr, size_t alignment)
{
return reinterpret_cast<uintptr_t> (
align (reinterpret_cast<void*> (ptr), alignment)
);
}
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}
#endif