// SPDX-FileCopyrightText: 2023 Tobias Schmidl
//
// SPDX-License-Identifier: AGPL-3.0-or-later

#include <glimpses/glimpses.hpp>
#include <sched.h>
#include <thread>
#include <unistd.h>

using namespace glimpses;

Glimpses::Glimpses()
{
}

Glimpses::CPUSet Glimpses::getCPUCount() const
{
    cpu_set_t cpuset;
    auto minmax = [](int64_t min, int64_t value, int64_t max) -> CPUCount {
        return std::min(std::max(value, min), max);
    };
    sched_getaffinity(0, sizeof(cpuset), &cpuset);
    return CPUSet{{"configured", minmax(0, sysconf(_SC_NPROCESSORS_CONF), MAX_CPU_COUNT)},
                  {"logical", minmax(0, std::thread::hardware_concurrency(), MAX_CPU_COUNT)},
                  {"online", minmax(0, sysconf(_SC_NPROCESSORS_ONLN), MAX_CPU_COUNT)},
                  {"allowed", minmax(0, CPU_COUNT(&cpuset), MAX_CPU_COUNT)}};
}