block_histogram_atomic.cuh

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#pragma once

#include "../../util_namespace.cuh"

CUB_NS_PREFIX

namespace cub {


template <int BINS>
struct BlockHistogramAtomic
{
    struct TempStorage {};


    __device__ __forceinline__ BlockHistogramAtomic(
        TempStorage &temp_storage)
    {}


    template <
        typename            T,
        typename            CounterT,     
        int                 ITEMS_PER_THREAD>
    __device__ __forceinline__ void Composite(
        T                   (&items)[ITEMS_PER_THREAD],     
        CounterT             histogram[BINS])                 
    {
        // Update histogram
        #pragma unroll
        for (int i = 0; i < ITEMS_PER_THREAD; ++i)
        {
              atomicAdd(histogram + items[i], 1);
        }
    }

};

}               // CUB namespace
CUB_NS_POSTFIX  // Optional outer namespace(s)