virtualx-engine/thirdparty/embree/common/algorithms/parallel_set.h

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// Copyright 2009-2021 Intel Corporation
2020-12-19 14:50:20 +01:00
// SPDX-License-Identifier: Apache-2.0
#pragma once
#include "parallel_sort.h"
namespace embree
{
/* implementation of a set of values with parallel construction */
template<typename T>
class parallel_set
{
public:
/*! default constructor for the parallel set */
parallel_set () {}
/*! construction from vector */
template<typename Vector>
parallel_set (const Vector& in) { init(in); }
/*! initialized the parallel set from a vector */
template<typename Vector>
void init(const Vector& in)
{
/* copy data to internal vector */
vec.resize(in.size());
parallel_for( size_t(0), in.size(), size_t(4*4096), [&](const range<size_t>& r) {
for (size_t i=r.begin(); i<r.end(); i++)
vec[i] = in[i];
});
/* sort the data */
std::vector<T> temp(in.size());
radix_sort<T>(vec.data(),temp.data(),vec.size());
}
/*! tests if some element is in the set */
__forceinline bool lookup(const T& elt) const {
return std::binary_search(vec.begin(), vec.end(), elt);
}
/*! clears all state */
void clear() {
vec.clear();
}
private:
std::vector<T> vec; //!< vector containing sorted elements
};
}