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