87 lines
2.1 KiB
C
87 lines
2.1 KiB
C
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/*
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* Copyright (c) 2014 The WebRTC project authors. All Rights Reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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#ifndef WEBRTC_SYSTEM_WRAPPERS_INCLUDE_ALIGNED_ARRAY_
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#define WEBRTC_SYSTEM_WRAPPERS_INCLUDE_ALIGNED_ARRAY_
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#include "webrtc/base/checks.h"
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#include "webrtc/system_wrappers/include/aligned_malloc.h"
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namespace webrtc {
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// Wrapper class for aligned arrays. Every row (and the first dimension) are
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// aligned to the given byte alignment.
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template<typename T> class AlignedArray {
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public:
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AlignedArray(size_t rows, size_t cols, size_t alignment)
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: rows_(rows),
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cols_(cols) {
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RTC_CHECK_GT(alignment, 0u);
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head_row_ = static_cast<T**>(AlignedMalloc(rows_ * sizeof(*head_row_),
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alignment));
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for (size_t i = 0; i < rows_; ++i) {
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head_row_[i] = static_cast<T*>(AlignedMalloc(cols_ * sizeof(**head_row_),
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alignment));
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}
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}
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~AlignedArray() {
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for (size_t i = 0; i < rows_; ++i) {
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AlignedFree(head_row_[i]);
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}
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AlignedFree(head_row_);
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}
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T* const* Array() {
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return head_row_;
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}
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const T* const* Array() const {
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return head_row_;
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}
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T* Row(size_t row) {
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RTC_CHECK_LE(row, rows_);
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return head_row_[row];
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}
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const T* Row(size_t row) const {
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RTC_CHECK_LE(row, rows_);
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return head_row_[row];
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}
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T& At(size_t row, size_t col) {
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RTC_CHECK_LE(col, cols_);
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return Row(row)[col];
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}
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const T& At(size_t row, size_t col) const {
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RTC_CHECK_LE(col, cols_);
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return Row(row)[col];
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}
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size_t rows() const {
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return rows_;
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}
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size_t cols() const {
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return cols_;
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}
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private:
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size_t rows_;
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size_t cols_;
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T** head_row_;
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};
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} // namespace webrtc
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#endif // WEBRTC_SYSTEM_WRAPPERS_INCLUDE_ALIGNED_ARRAY_
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