| /****************************************************************************** |
| * Copyright (c) 2011-2022, NVIDIA CORPORATION. All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions are met: |
| * * Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * * Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * * Neither the name of the NVIDIA CORPORATION nor the |
| * names of its contributors may be used to endorse or promote products |
| * derived from this software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
| * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| * ARE DISCLAIMED. IN NO EVENT SHALL NVIDIA CORPORATION BE LIABLE FOR ANY |
| * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES |
| * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
| * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND |
| * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS |
| * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| * |
| ******************************************************************************/ |
| |
| #pragma once |
| |
| #include <cub/config.cuh> |
| |
| #include <cstdint> |
| #include <type_traits> |
| |
| CUB_NAMESPACE_BEGIN |
| |
| namespace detail |
| { |
| |
| /** |
| * ChooseOffsetT checks NumItemsT, the type of the num_items parameter, and |
| * selects the offset type based on it. |
| */ |
| template <typename NumItemsT> |
| struct ChooseOffsetT |
| { |
| // NumItemsT must be an integral type (but not bool). |
| static_assert( |
| std::is_integral<NumItemsT>::value && |
| !std::is_same<typename std::remove_cv<NumItemsT>::type, bool>::value, |
| "NumItemsT must be an integral type, but not bool"); |
| |
| // Unsigned integer type for global offsets. |
| using Type = typename std::conditional<sizeof(NumItemsT) <= 4, |
| std::uint32_t, |
| unsigned long long>::type; |
| }; |
|
|
| } // namespace detail |
|
|
| CUB_NAMESPACE_END |
|
|
|
|
