algorithm.hpp

/*
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*  Author: Anatoly Baskeheev, Itseez Ltd, (myname.mysurname@mycompany.com)
*/
 
#ifndef PCL_PGU_DEVICE_ALGORITHM_HPP_
#define PCL_PGU_DEVICE_ALGORITHM_HPP_
 
namespace pcl
{
    namespace device
    {
        template <class T> 
        __device__ __host__ __forceinline__ void swap ( T& a, T& b )
        {
          T c(a); a=b; b=c;
        }
        
        template<typename Iterator, typename T, typename BinaryPredicate>
        __host__ __device__ Iterator lower_bound(Iterator first, Iterator last, const T &val, BinaryPredicate comp)
        {  
            int len = last - first;
 
            while(len > 0)
            {
                int half = len >> 1;
                Iterator middle = first;
 
                middle += half;
 
                if(comp(*middle, val))
                {
                    first = middle;
                    ++first;
                    len -= half + 1;
                }
                else
                {
                    len = half;
                }
            }
            return first;
        }
    }
}
#endif /* PCL_PGU_DEVICE_ALGORITHM_HPP_ */