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/******************************************************************************
 * Copyright (c) 2011, Duane Merrill.  All rights reserved.
 * Copyright (c) 2011-2016, NVIDIA CORPORATION.  All rights reserved.
 *
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 * 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.
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 *     * Neither the name of the NVIDIA CORPORATION nor the
 *       names of its contributors may be used to endorse or promote products
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/******************************************************************************
 * Test of BlockHistogram utilities
 ******************************************************************************/

// Ensure printing of CUDA runtime errors to console
#define CUB_STDERR

#include <stdio.h>
#include <limits>
#include <string>
#include <typeinfo>

#include <cub/block/block_histogram.cuh>
#include <cub/block/block_load.cuh>
#include <cub/block/block_store.cuh>
#include <cub/util_allocator.cuh>

#include "test_util.h"

using namespace cub;


//---------------------------------------------------------------------
// Globals, constants and typedefs
//---------------------------------------------------------------------

bool                    g_verbose           = false;
int                     g_timing_iterations = 0;
int                     g_repeat            = 0;
CachingDeviceAllocator  g_allocator(true);


//---------------------------------------------------------------------
// Test kernels
//---------------------------------------------------------------------

/**
 * BlockHistogram test kernel.
 */
template <
    int                     BINS,
    int                     BLOCK_THREADS,
    int                     ITEMS_PER_THREAD,
    BlockHistogramAlgorithm ALGORITHM,
    typename                T,
    typename                HistoCounter>
__global__ void BlockHistogramKernel(
    T                       *d_samples,
    HistoCounter            *d_histogram)
{
    // Parameterize BlockHistogram type for our thread block
    typedef BlockHistogram<T, BLOCK_THREADS, ITEMS_PER_THREAD, BINS, ALGORITHM> BlockHistogram;

    // Allocate temp storage in shared memory
    __shared__ typename BlockHistogram::TempStorage temp_storage;

    // Per-thread tile data
    T data[ITEMS_PER_THREAD];
    LoadDirectStriped<BLOCK_THREADS>(threadIdx.x, d_samples, data);

    // Test histo (writing directly to histogram buffer in global)
    BlockHistogram(temp_storage).Histogram(data, d_histogram);
}


/**
 * Initialize problem (and solution)
 */
template <
    int             BINS,
    typename        SampleT>
void Initialize(
    GenMode         gen_mode,
    SampleT         *h_samples,
    int             *h_histograms_linear,
    int             num_samples)
{
    // Init bins
    for (int bin = 0; bin < BINS; ++bin)
    {
        h_histograms_linear[bin] = 0;
    }

    if (g_verbose) printf("Samples: \n");

    // Initialize interleaved channel samples and histogram them correspondingly
    for (int i = 0; i < num_samples; ++i)
    {