VC++ PDH/性能计数器

最新推荐文章于 2024-09-19 21:28:18 发布

liulilittle

最新推荐文章于 2024-09-19 21:28:18 发布

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分类专栏： C/C++ 文章标签： c++ 单片机开发语言

本文链接：https://blog.youkuaiyun.com/liulilittle/article/details/138660331

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例子：

PID=0，缺省为当前进程，但最好是获取当前进程ID传递进去，当然也可以选择其它进程的ID。

PerformanceCounter pc;

pc.Open(0, "//Processor(_Total)//% Processor Time");

源实现：

#include <windows.h>
#include <pdh.h>

        class PerformanceCounter
        {
        public:
            PerformanceCounter() noexcept;
            virtual ~PerformanceCounter() noexcept;

        public:
            virtual double              Next() noexcept;
            virtual void                Open(int pid, LPCSTR counter);
            virtual void                Dispose() noexcept;

        private:
            void                        Release() noexcept;

        private:
            std::atomic<void*>          m_phQuery   = NULL;
            std::atomic<void*>          m_phCounter = NULL;
        };

        PerformanceCounter::PerformanceCounter() noexcept
            : m