/* Copyright (c) 2021, 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 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 ``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 THE COPYRIGHT OWNER OR
 * CONTRIBUTORS 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.
 */

////////////////////////////////////////////////////////////////////////////////
// Shortcut definitions
////////////////////////////////////////////////////////////////////////////////
typedef unsigned int uint;

#define SHARED_SIZE_LIMIT 1024U
#define SAMPLE_STRIDE 128

////////////////////////////////////////////////////////////////////////////////
// Extensive sort validation routine
////////////////////////////////////////////////////////////////////////////////
extern "C" uint validateSortedKeys(uint *resKey, uint *srcKey, uint batchSize,
                                   uint arrayLength, uint numValues,
                                   uint sortDir);

extern "C" void fillValues(uint *val, uint N);

extern "C" int validateSortedValues(uint *resKey, uint *resVal, uint *srcKey,
                                    uint batchSize, uint arrayLength);

////////////////////////////////////////////////////////////////////////////////
// CUDA merge sort
////////////////////////////////////////////////////////////////////////////////
extern "C" void initMergeSort(void);

extern "C" void closeMergeSort(void);

extern "C" void mergeSort(uint *dstKey, uint *dstVal, uint *bufKey,
                          uint *bufVal, uint *srcKey, uint *srcVal, uint N,
                          uint sortDir);

////////////////////////////////////////////////////////////////////////////////
// CPU "emulation"
////////////////////////////////////////////////////////////////////////////////
extern "C" void mergeSortHost(uint *dstKey, uint *dstVal, uint *bufKey,
                              uint *bufVal, uint *srcKey, uint *srcVal, uint N,
                              uint sortDir);