added load average calculations and moved the testing from main to their own cli commands

internal/windows_system/win.go

@@ -13,6 +13,10 @@ type WindowsSystemCheckTools struct {
 	 * Win32 API
 	 */
 	Kernel32 *windows.LazyDLL
+	/*
+	 * Performance Data Helper
+	 */
+	PDH *windows.LazyDLL
 	/*
 	 * Windows memory information
 	 */
@@ -25,18 +29,53 @@ type WindowsSystemCheckTools struct {
 	 * Windows uptime metrics
 	 */
 	Uptime *windows.LazyProc
+	/*
+	 * Opening PDH queries
+	 */
+	ProcPdhOpenQuery *windows.LazyProc
+	/*
+	 * Adding counters to open queries
+	 */
+	ProcPdhAddCounter *windows.LazyProc
+	/*
+	 * Collecting query data
+	 */
+	ProcPdhCollectQueryData *windows.LazyProc
+	/*
+	 * Extracting formatted query value from data
+	 */
+	ProcPdhGetFormattedCounterValue *windows.LazyProc
+	/*
+	 * Closing PDH queries
+	 */
+	ProcPdhCloseQuery *windows.LazyProc
 }
 
 func GetWindowsTools() WindowsSystemCheckTools {
 	kernel32 := sync.OnceValue(func() *windows.LazyDLL { return windows.NewLazySystemDLL("kernel32.dll") })
+	pdh := sync.OnceValue(func() *windows.LazyDLL { return windows.NewLazySystemDLL("pdh.dll") })
+
 	procGlobalMemoryStatusEx := sync.OnceValue(func() *windows.LazyProc { return kernel32().NewProc("GlobalMemoryStatusEx") })
 	systemTimes := sync.OnceValue(func() *windows.LazyProc { return kernel32().NewProc("GetSystemTimes") })
 	uptime := sync.OnceValue(func() *windows.LazyProc { return kernel32().NewProc("GetTickCount64") })
 
+	// PDH functions
+	procPdhOpenQuery := sync.OnceValue(func() *windows.LazyProc { return pdh().NewProc("PdhOpenQueryW") })
+	procPdhAddCounter := sync.OnceValue(func() *windows.LazyProc { return pdh().NewProc("PdhAddEnglishCounterW") })
+	procPdhCollectQueryData := sync.OnceValue(func() *windows.LazyProc { return pdh().NewProc("PdhCollectQueryData") })
+	procPdhGetFormattedCounterValue := sync.OnceValue(func() *windows.LazyProc { return pdh().NewProc("PdhGetFormattedCounterValue") })
+	procPdhCloseQuery := sync.OnceValue(func() *windows.LazyProc { return pdh().NewProc("PdhCloseQuery") })
+
 	return WindowsSystemCheckTools{
-		Kernel32:                 kernel32(),
-		ProcGlobalMemoryStatusEx: procGlobalMemoryStatusEx(),
-		SystemTimes:              systemTimes(),
-		Uptime:                   uptime(),
+		Kernel32:                        kernel32(),
+		PDH:                             pdh(),
+		ProcGlobalMemoryStatusEx:        procGlobalMemoryStatusEx(),
+		SystemTimes:                     systemTimes(),
+		Uptime:                          uptime(),
+		ProcPdhOpenQuery:                procPdhOpenQuery(),
+		ProcPdhAddCounter:               procPdhAddCounter(),
+		ProcPdhCollectQueryData:         procPdhCollectQueryData(),
+		ProcPdhGetFormattedCounterValue: procPdhGetFormattedCounterValue(),
+		ProcPdhCloseQuery:               procPdhCloseQuery(),
 	}
 }