| /* |
| * 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 RTC_BASE_MEMORY_ALIGNED_ARRAY_H_ |
| #define RTC_BASE_MEMORY_ALIGNED_ARRAY_H_ |
| |
| #include <stddef.h> |
| |
| #include "rtc_base/checks.h" |
| #include "rtc_base/memory/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(size_t rows, size_t cols, size_t alignment) |
| : rows_(rows), cols_(cols) { |
| RTC_CHECK_GT(alignment, 0); |
| head_row_ = |
| static_cast<T**>(AlignedMalloc(rows_ * sizeof(*head_row_), alignment)); |
| for (size_t i = 0; i < rows_; ++i) { |
| head_row_[i] = static_cast<T*>( |
| AlignedMalloc(cols_ * sizeof(**head_row_), alignment)); |
| } |
| } |
| |
| ~AlignedArray() { |
| for (size_t 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(size_t row) { |
| RTC_CHECK_LE(row, rows_); |
| return head_row_[row]; |
| } |
| |
| const T* Row(size_t row) const { |
| RTC_CHECK_LE(row, rows_); |
| return head_row_[row]; |
| } |
| |
| T& At(size_t row, size_t col) { |
| RTC_CHECK_LE(col, cols_); |
| return Row(row)[col]; |
| } |
| |
| const T& At(size_t row, size_t col) const { |
| RTC_CHECK_LE(col, cols_); |
| return Row(row)[col]; |
| } |
| |
| size_t rows() const { return rows_; } |
| |
| size_t cols() const { return cols_; } |
| |
| private: |
| size_t rows_; |
| size_t cols_; |
| T** head_row_; |
| }; |
| |
| } // namespace webrtc |
| |
| #endif // RTC_BASE_MEMORY_ALIGNED_ARRAY_H_ |