新增通过pdh接口获取显卡利用率的功能，实现Lite版也能显示显卡利用率

Author: zhongyang219

TrafficMonitor/CPUUsage.cpp

@@ -22,9 +22,9 @@ enum DisplayItem
 //所有内置显示项目的集合
 const std::set<DisplayItem> AllDisplayItems
 {
-    TDI_UP, TDI_DOWN, TDI_CPU, TDI_MEMORY
+    TDI_UP, TDI_DOWN, TDI_CPU, TDI_MEMORY, TDI_GPU_USAGE
 #ifndef WITHOUT_TEMPERATURE
-    , TDI_GPU_USAGE, TDI_CPU_TEMP, TDI_GPU_TEMP, TDI_HDD_TEMP, TDI_MAIN_BOARD_TEMP, TDI_HDD_USAGE
+    , TDI_CPU_TEMP, TDI_GPU_TEMP, TDI_HDD_TEMP, TDI_MAIN_BOARD_TEMP, TDI_HDD_USAGE
 #endif
     ,TDI_CPU_FREQ, TDI_TOTAL_SPEED, TDI_TODAY_TRAFFIC
 };

TrafficMonitor/CPUUsage.h

@@ -33,7 +33,6 @@ void CGeneralSettingsDlg::CheckTaskbarDisplayItem()
     }
     if (!theApp.m_general_data.IsHardwareEnable(HI_GPU))
     {
-        theApp.m_taskbar_data.display_item.Remove(TDI_GPU_USAGE);
         theApp.m_taskbar_data.display_item.Remove(TDI_GPU_TEMP);
     }
     if (!theApp.m_general_data.IsHardwareEnable(HI_HDD))

TrafficMonitor/DisplayItem.h

@@ -0,0 +1,95 @@
+#include "stdafx.h"
+#include "CPUUsage.h"
+#include "Common.h"
+#include "TrafficMonitor.h"
+#include <powerbase.h>
+#include <sysinfoapi.h>
+
+
+///////////////////////////////////////////////////////////////////////////////////////
+///////////////////////////////////////////////////////////////////////////////////////
+CPdhCPUUsage::CPdhCPUUsage()
+    : CPdhQuery(theApp.m_win_version.GetMajorVersion() >= 10 ? _T("\\Processor Information(_Total)\\% Processor Utility") : _T("\\Processor Information(_Total)\\% Processor Time"))
+{
+}
+
+bool CPdhCPUUsage::GetCPUUsage(int& cpu_usage)
+{
+    double value{};
+    if (QueryValue(value))
+    {
+        cpu_usage = static_cast<int>(value);
+        if (cpu_usage > 100)
+            cpu_usage = 100;
+        return true;
+    }
+    return false;
+}
+
+///////////////////////////////////////////////////////////////////////////////////////
+///////////////////////////////////////////////////////////////////////////////////////
+CCPUUsage::CCPUUsage()
+{
+}
+
+void CCPUUsage::SetUseCPUTimes(bool use_get_system_times)
+{
+    if (m_use_get_system_times != use_get_system_times)
+    {
+        m_use_get_system_times = use_get_system_times;
+    }
+}
+
+int CCPUUsage::GetCpuUsage()
+{
+    int cpu_usage{};
+    if (m_use_get_system_times)
+    {
+        cpu_usage = GetCpuUsageByGetSystemTimes();
+    }
+    else
+    {
+        //如果通过pdh获取CPU利用率失败，采用GetSystemTimes获取
+        if (!m_pdh_cup_usage_query.GetCPUUsage(cpu_usage))
+        {
+            cpu_usage = GetCpuUsageByGetSystemTimes();
+            //写入日志
+            //static bool write_log = false;
+            //if (!write_log)
+            //{
+            //    CString str_log = CCommon::LoadTextFormat(IDS_GET_CPU_USAGE_BY_PDH_FAILED_LOG, { fullCounterPath });
+            //    CCommon::WriteLog(str_log, theApp.m_log_path.c_str());
+            //    write_log = true;
+            //}
+        }
+    }
+    return cpu_usage;
+}
+
+int CCPUUsage::GetCpuUsageByGetSystemTimes()
+{
+    int cpu_usage{};
+    FILETIME idleTime;
+    FILETIME kernelTime;
+    FILETIME userTime;
+    GetSystemTimes(&idleTime, &kernelTime, &userTime);
+
+    __int64 idle = CCommon::CompareFileTime2(m_preidleTime, idleTime);
+    __int64 kernel = CCommon::CompareFileTime2(m_prekernelTime, kernelTime);
+    __int64 user = CCommon::CompareFileTime2(m_preuserTime, userTime);
+
+    if (kernel + user == 0)
+    {
+        cpu_usage = 0;
+    }
+    else
+    {
+        //（总的时间-空闲时间）/总的时间=占用cpu的时间就是使用率
+        cpu_usage = static_cast<int>(abs((kernel + user - idle) * 100 / (kernel + user)));
+    }
+    m_preidleTime = idleTime;
+    m_prekernelTime = kernelTime;
+    m_preuserTime = userTime;
+
+    return cpu_usage;
+}