Roc Toolkit internal modules
Roc Toolkit: real-time audio streaming
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alignment.h
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1/*
2 * Copyright (c) 2017 Roc authors
3 *
4 * This Source Code Form is subject to the terms of the Mozilla Public
5 * License, v. 2.0. If a copy of the MPL was not distributed with this
6 * file, You can obtain one at http://mozilla.org/MPL/2.0/.
7 */
8
9//! @file roc_core/alignment.h
10//! @brief Alignment.
11
12#ifndef ROC_CORE_ALIGNMENT_H_
13#define ROC_CORE_ALIGNMENT_H_
14
15#include "roc_core/stddefs.h"
16
17namespace roc {
18namespace core {
19
20//! A union with maximum possible allignment.
21union MaxAlign {
22 double d; //!< Double.
23 void (*fp)(); //!< Function pointer.
24};
25
26//! Adjust the given size to be maximum aligned.
27inline size_t max_align(size_t sz) {
28 enum { Align = sizeof(MaxAlign) };
29 if (sz % Align != 0) {
30 sz += Align - sz % Align;
31 }
32 return sz;
33}
34
35//! Calculate padding required for given alignment.
36inline size_t padding(size_t size, size_t alignment) {
37 if (alignment == 0) {
38 return 0;
39 }
40 size_t new_size = size / alignment * alignment;
41 if (new_size < size) {
42 new_size += alignment;
43 }
44 return (new_size - size);
45}
46
47} // namespace core
48} // namespace roc
49
50#endif // ROC_CORE_ALIGNMENT_H_
size_t max_align(size_t sz)
Adjust the given size to be maximum aligned.
Definition: alignment.h:27
size_t padding(size_t size, size_t alignment)
Calculate padding required for given alignment.
Definition: alignment.h:36
Root namespace.
Commonly used types and functions.
A union with maximum possible allignment.
Definition: alignment.h:21
double d
Double.
Definition: alignment.h:22
void(* fp)()
Function pointer.
Definition: alignment.h:23