Added uptime functionality

internal/windows_system/win.go

@@ -21,16 +21,22 @@ type WindowsSystemCheckTools struct {
 	 * Windows processor information
 	 */
 	SystemTimes *windows.LazyProc
+	/*
+	 * Windows uptime metrics
+	 */
+	Uptime *windows.LazyProc
 }
 
 func GetWindowsTools() WindowsSystemCheckTools {
 	kernel32 := sync.OnceValue(func() *windows.LazyDLL { return windows.NewLazySystemDLL("kernel32.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") })
 
 	return WindowsSystemCheckTools{
 		Kernel32:                 kernel32(),
 		ProcGlobalMemoryStatusEx: procGlobalMemoryStatusEx(),
 		SystemTimes:              systemTimes(),
+		Uptime:                   uptime(),
 	}
 }