RB5.20 execution, которого нет

RobertDeMilo

Apr 18th, 2024

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#include<iostream>
#include<cstdint>
#include<vector>
#include<future>
#include<execution>
#include "log_duration.h"
using namespace std;
template <typename ContainerOfVectors>
void GenerateSingleThread(ContainerOfVectors& result, size_t first_row, size_t column_size)
{
for_each(execution::par, begin(result), end(result),
[&first_row, column_size](vector<int>& row)
{
row.reserve(column_size);
for (size_t column = 0; column < column_size; ++column)
{
row.push_back(first_row ^ column);
}
++first_row;
}
);
}
vector<vector<int>>GenerateSingleThread(size_t size)
{
vector<vector<int>> result(size);
GenerateSingleThread(result, 0, size);
return result;
}
template <typename ContainerOfVectors>
int64_t SumSingleThread(const ContainerOfVectors& matrix)
{
int64_t sum = 0;
for (const auto& row : matrix)
{
for (auto item : row)
{
{
sum += item;
}
}
}
return sum;
}
int main()
{
LOG_DURATION("Total");
const size_t matrix_size = 7000;
vector<vector<int>> matrix;
{
LOG_DURATION("Single thread generation");
matrix = GenerateSingleThread(matrix_size);
}
{
LOG_DURATION("Single thread sum");
cout << SumSingleThread(matrix) << endl;
}
return 0;
}

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