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///
/// @file LoadBalancerAC.hpp
/// @brief This load balancer assigns work to the threads in the
/// computation of the A & C formulas (AC.cpp) in
/// Xavier Gourdon's algorithm.
///
/// Load balancing is described in more detail at:
/// https://github.com/kimwalisch/primecount/blob/master/doc/Easy-Special-Leaves.md
///
/// Copyright (C) 2021 Kim Walisch, <kim.walisch@gmail.com>
///
/// This file is distributed under the BSD License. See the COPYING
/// file in the top level directory.
///
#ifndef LOADBALANCERAC_HPP
#define LOADBALANCERAC_HPP
#include <OmpLock.hpp>
#include <stdint.h>
namespace primecount {
class LoadBalancerAC
{
public:
LoadBalancerAC(int64_t sqrtx, int64_t y, int threads, bool is_print);
bool get_work(int64_t& low, int64_t& high);
private:
void validate_segment_sizes();
void compute_total_segments();
void print_status();
int64_t low_ = 0;
int64_t sqrtx_ = 0;
int64_t x14_ = 0;
int64_t y_ = 0;
int64_t segment_size_ = 0;
int64_t large_segment_size_ = 0;
int64_t segment_nr_ = 0;
int64_t total_segments_ = 0;
double time_ = 0;
int threads_ = 0;
bool is_print_ = false;
OmpLock lock_;
};
} // namespace
#endif