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Copy pathcode.hh
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83 lines (71 loc) · 2.99 KB
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#include <execution>
#include <pybind11/pybind11.h>
#include <pybind11/functional.h>
#include <iostream>
#include <functional>
#include <numeric>
#include <cmath>
// see https://en.wikipedia.org/wiki/List_of_trigonometric_identities#Lagrange's_trigonometric_identities
namespace py = pybind11;
double cpp_inner_loop(const unsigned int& M) {
std::vector<double> v(M);
std::iota(v.begin(), v.end(), 0);
std::transform(std::execution::seq, v.begin(), v.end(), v.begin(), [](const double& k){
return 1.0 / ((4*k + 1) * (4*k + 3));
});
return std::reduce(std::execution::seq, v.begin(), v.end(), 0.0, std::plus<>());
}
double cpp_outer_loop(const std::function<double (const unsigned int&)>& xf,
const unsigned int& N, const unsigned int& M) {
try {
std::vector<double> v(N);
std::iota(v.begin(), v.end(), 0);
std::transform(std::execution::par, v.begin(), v.end(), v.begin(), [&xf, &M](const auto& n){
return std::cos((n+1) * xf(M)) + std::sin((n+1) * xf(M));
});
return std::reduce(std::execution::par, v.begin(), v.end(), 0.0, std::plus<>());
} catch (const std::exception& e) {
py::print(py::str(e.what()));
return -1;
}
}
double cpp_outer_loop_gil(const std::function<double (const unsigned int&)>& xf,
const unsigned int& N, const unsigned int& M) {
try {
py::gil_scoped_release release;
std::vector<double> v(N);
std::iota(v.begin(), v.end(), 0);
std::transform(std::execution::par, v.begin(), v.end(), v.begin(), [&xf, &M](const auto& n){
py::gil_scoped_acquire acquire;
return std::cos((n+1) * xf(M)) + std::sin((n+1) * xf(M));
});
return std::reduce(std::execution::par, v.begin(), v.end(), 0.0, std::plus<>());
} catch (const std::exception& e) {
py::print(py::str(e.what()));
return -1;
}
}
double cpp_outer_loop_process(const std::function<void (const unsigned int&, const unsigned int&)>& xg,
const std::function<double (const unsigned int&)>& xf,
const unsigned int& N, const unsigned int& M) {
try {
py::gil_scoped_release release;
std::vector<double> v(N);
std::iota(v.begin(), v.end(), 0);
std::for_each(std::execution::par, v.begin(), v.end(), [&xg, &M](const auto& n){
py::gil_scoped_acquire acquire;
xg(n, M);
});
std::transform(std::execution::par, v.begin(), v.end(), v.begin(), [&xf](const auto& n){
py::gil_scoped_acquire acquire;
return std::cos((n+1) * xf(n)) + std::sin((n+1) * xf(n));
});
return std::reduce(std::execution::par, v.begin(), v.end(), 0.0, std::plus<>());
} catch (const std::exception& e) {
py::print(py::str(e.what()));
return -1;
}
}
double full_cpp(const unsigned int& N, const unsigned int& M) {
return cpp_outer_loop(cpp_inner_loop, N, M);
}