ReCpp/src/rpp/proc_utils.h at master · RedFox20/ReCpp · GitHub

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/**
 * Cross platform process information, Copyright (c) 2024, Jorma Rebane
 * Distributed under MIT Software License
 */
#pragma once
#include "config.h"

namespace rpp
{
    /**
     * Process memory usage information - for profiling stats.
     */
    struct proc_mem_info
    {
        /// @brief Total virtual memory reserved for this process.
        //         Includes all memory mapped files, swap, etc.
        uint64 virtual_size = 0;

        /// @brief Resident set size (RSS) is the actual physical memory
        //         currently mapped to the process.
        uint64 physical_mem = 0;

        double virtual_size_kb() const noexcept { return virtual_size / 1'000.0; }
        double physical_mem_kb() const noexcept { return physical_mem / 1'000.0; }
        double virtual_size_mb() const noexcept { return virtual_size / 1'000'000.0; }
        double physical_mem_mb() const noexcept { return physical_mem / 1'000'000.0; }
    };

    /**
     * @return Current physical memory usage in bytes.
     */
    proc_mem_info proc_current_mem_used() noexcept;


    /**
     * CPU usage information - for profiling stats.
     */
    struct cpu_usage_info
    {
        /// @brief Total CPU time used in microseconds.
        ///        User + Kernel.
        int64 cpu_time_us = 0;

        /// @brief Total CPU time used in user mode in microseconds.
        int64 user_time_us = 0;

        /// @brief Total CPU time used in kernel mode in microseconds.
        int64 kernel_time_us = 0;

        double cpu_time_ms() const noexcept { return cpu_time_us / 1'000.0; }
        double user_time_ms() const noexcept { return user_time_us / 1'000.0; }
        double kernel_time_ms() const noexcept { return kernel_time_us / 1'000.0; }

        double cpu_time_sec() const noexcept { return cpu_time_us / 1'000'000.0; }
        double user_time_sec() const noexcept { return user_time_us / 1'000'000.0; }
        double kernel_time_sec() const noexcept { return kernel_time_us / 1'000'000.0; }
    };

    /**
     * @return Total CPU time used by this PROCESS in microseconds.
     * @brief To calculate CPU usage %, call this function twice over a known time interval.
     */
    cpu_usage_info proc_total_cpu_usage() noexcept;


} // namespace rpp