Cpu 사용율 알아내는 소스

Visual C++에서 작업 하였다.

출력

CPU Usage : 57.8125% CPU Usage : 40.625% CPU Usage : 28.125% CPU Usage : 29.6875% CPU Usage : 18.1818% CPU Usage : 21.875% CPU Usage : 4.6875% CPU Usage : 1.5625%

소스

#pragma comment(lib, "pdh.lib") #include <windows.h> #include <pdh.h> #include <pdhmsg.h> #include <iostream> using namespace std; class CpuUsage { private:         PDH_HQUERY              m_hQuery;         PDH_HCOUNTER    m_hCounter; public:         CpuUsage()      :       m_hQuery( 0 ), m_hCounter( 0 )  {}         ~CpuUsage()             {       destroy();      }         bool    init()         {                 PDH_STATUS      status = PdhOpenQuery (0, 0, &m_hQuery);                 if( status != ERROR_SUCCESS )                         return false;                 status = PdhAddCounter( m_hQuery, "\\Processor(_TOTAL)\\% Processor Time", 0, &m_hCounter );                 if( status != ERROR_SUCCESS )                         return false;                 status = PdhCollectQueryData( m_hQuery );                 if( status != ERROR_SUCCESS )                 {                         return false;                 }                 return true;         }         void    destroy()         {                 if( m_hQuery )                         PdhCloseQuery( m_hQuery );                 m_hQuery = 0;         }         bool    getCpuUsage( double * val )         {                 PDH_STATUS      status = PdhCollectQueryData( m_hQuery );                 if( status != ERROR_SUCCESS )                         return false;                 PDH_FMT_COUNTERVALUE    value;                 status = PdhGetFormattedCounterValue( m_hCounter, PDH_FMT_DOUBLE,       0, &value);                 if (status != ERROR_SUCCESS)                         return false;                 *val = value.doubleValue;                 return true;         } }; int main( int argc, char * argv[] ) {         CpuUsage        cpuUsage;         if( cpuUsage.init() == false )                 return 1;         while( true )         {                 double  val = 0.0;                 if( cpuUsage.getCpuUsage( &val ) )                         cout << "CPU Usage : " << val << "%\n";                 Sleep( 500 );         }         cout << "\t\thttp://fehead.tistory.com\n";         return 0; }