// ----------------------------------------------------------------------------
// -                        Open3D: www.open3d.org                            -
// ----------------------------------------------------------------------------
// Copyright (c) 2018-2023 www.open3d.org
// SPDX-License-Identifier: MIT
// ----------------------------------------------------------------------------
#pragma once

#include <memory>

namespace open3d {
namespace utility {

/// \brief CPU information.
class CPUInfo {
public:
    static CPUInfo& GetInstance();

    ~CPUInfo() = default;
    CPUInfo(const CPUInfo&) = delete;
    void operator=(const CPUInfo&) = delete;

    /// Returns the number of physical CPU cores.
    /// This is similar to boost::thread::physical_concurrency().
    int NumCores() const;

    /// Returns the number of logical CPU cores.
    /// This returns the same result as std::thread::hardware_concurrency() or
    /// boost::thread::hardware_concurrency().
    int NumThreads() const;

    /// Prints CPUInfo in the console.
    void Print() const;

private:
    CPUInfo();
    struct Impl;
    std::unique_ptr<Impl> impl_;
};

}  // namespace utility
}  // namespace open3d