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51 lines
1.8 KiB
51 lines
1.8 KiB
#ifndef MY_POINTER_ARITHMETIC_INCLUDED
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#define MY_POINTER_ARITHMETIC_INCLUDED
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/*
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Copyright (c) 2016, 2017, Oracle and/or its affiliates. All rights reserved.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License, version 2.0,
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as published by the Free Software Foundation.
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This program is also distributed with certain software (including
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but not limited to OpenSSL) that is licensed under separate terms,
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as designated in a particular file or component or in included license
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documentation. The authors of MySQL hereby grant you an additional
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permission to link the program and your derivative works with the
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separately licensed software that they have included with MySQL.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License, version 2.0, for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA */
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#include <stdint.h>
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/**
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@file include/my_pointer_arithmetic.h
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Some macros for dealing with pointer arithmetic, e.g., aligning
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of buffers to a given size.
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*/
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#define MY_ALIGN(A, L) (((A) + (L)-1) & ~((L)-1))
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#define ALIGN_SIZE(A) MY_ALIGN((A), sizeof(double))
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#ifdef __cplusplus
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template <typename T>
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bool is_aligned_to(T *t, int increment) {
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return reinterpret_cast<uintptr_t>(t) % increment == 0;
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}
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template <typename T>
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bool is_aligned(T *t) {
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return is_aligned_to(t, alignof(T));
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}
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#endif // __cplusplus
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#endif // MY_POINTER_ARITHMETIC_INCLUDED
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