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// Copyright (c) 2013-2014 Kyle Lutz <>
// Distributed under the Boost Software License, Version 1.0
// See accompanying file LICENSE_1_0.txt or copy at
// See for more information.


#include <cmath>

namespace boost {
namespace compute {
namespace detail {

// Given a total number of values (count), a number of values to
// process per thread (vtp), and a number of threads to execute per
// block (tpb), this function returns the global work size to be
// passed to clEnqueueNDRangeKernel() for a 1D algorithm.
inline size_t calculate_work_size(size_t count, size_t vpt, size_t tpb)
    size_t work_size = static_cast<size_t>(std::ceil(float(count) / vpt));
    if(work_size % tpb != 0){
        work_size += tpb - work_size % tpb;
    return work_size;

} // end detail namespace
} // end compute namespace
} // end boost namespace