You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: swbemservices.go
    path of file: ./repos/kubeedge/vendor/github.com/yusufpapurcu/wmi
    
    the code of the file until where you have to start completion: // +build windows

package wmi

import (
	"fmt"
	"reflect"
	"runtime"
	"sync"

	"github.com/go-ole/go-ole"
	"github.com/go-ole/go-ole/oleutil"
)

// SWbemServices is used to access wmi. See https://msdn.microsoft.com/en-us/library/aa393719(v=vs.85).aspx
type SWbemServices struct {
	//TODO: track namespace. Not sure if we can re connect to a different namespace using the same instance
	cWMIClient            *Client //This could also be an embedded struct, but then we would need to branch on Client vs SWbemServices in the Query method
	sWbemLocatorIUnknown  *ole.IUnknown
	sWbemLocatorIDispatch *ole.IDispatch
	queries               chan *queryRequest
	closeError            chan error
	lQueryorClose         sync.Mutex
}

type queryRequest struct {
	query    string
	dst      interface{}
	args     []interface{}
	finished chan error
}

// InitializeSWbemServices will return a new SWbemServices object that can be used to query WMI
func InitializeSWbemServices(c *Client, connectServerArgs ...interface{}) (*SWbemServices, error) {
	//fmt.Println("InitializeSWbemServices: Starting")
	//TODO: implement connectServerArgs as optional argument for init with connectServer call
	s := new(SWbemServices)
	s.cWMIClient = c
	s.queries = make(chan *queryRequest)
	initError := make(chan error)
	go s.process(initError)

	err, ok := <-initError
	if ok {
		return nil, err //Send error to caller
	}
	//fmt.Println("InitializeSWbemServices: Finished")
	return s, nil
}

// Close will clear and release all of the SWbemServices resources
func (s *SWbemServices) Close() error {
	s.lQueryorClose.Lock()
	if s == nil || s.sWbemLocatorIDispatch == nil {
		s.lQueryorClose.Unlock()
		return fmt.Errorf("SWbemServices is not Initialized")
	}
	if s.queries == nil {
		s.lQueryorClose.Unlock()
		return fmt.Errorf("SWbemServices has been closed")
	}
	//fmt.Println("Close: sending close request")
	var result error
	ce := make(chan error)
	s.closeError = ce //Race condition if multiple callers to close. May need to lock here
	close(s.queries)  //Tell background to shut things down
	s.lQueryorClose.Unlock()
	err, ok := <-ce
	if ok {
		result = err
	}
	//fmt.Prin
    
func (s *SWbemServices) queryBackground(q *queryRequest) error {
	if s == nil || s.sWbemLocatorIDispatch == nil {
		return fmt.Errorf("SWbemServices is not Initialized")
	}
	wmi := s.sWbemLocatorIDispatch //Should just rename in the code, but this will help as we break things apart
	//fmt.Println("queryBackground: Starting")

	dv := reflect.ValueOf(q.dst)
	if dv.Kind() != reflect.Ptr || dv.IsNil() {
		return ErrInvalidEntityType
	}
	dv = dv.Elem()
	mat, elemType := checkMultiArg(dv)
	if mat == multiArgTypeInvalid {
		return ErrInvalidEntityType
	}

	// service is a SWbemServices
	serviceRaw, err := oleutil.CallMethod(wmi, "ConnectServer", q.args...)
	if err != nil {
		return err
	}
	service := serviceRaw.ToIDispatch()
	defer serviceRaw.Clear()

	// result is a SWBemObjectSet
	resultRaw, err := oleutil.CallMethod(service, "ExecQuery", q.query)
	if err != nil {
		return err
	}
	result := resultRaw.ToIDispatch()
	defer resultRaw.Clear()

	count, err := oleInt64(result, "Count")
	if err != nil {
		return err
	}

	enumProperty, err := result.GetProperty("_NewEnum")
	if err != nil {
		return err
	}
	defer enumProperty.Clear()

	enum, err := enumProperty.ToIUnknown().IEnumVARIANT(ole.IID_IEnumVariant)
	if err != nil {
		return err
	}
	if enum == nil {
		return fmt.Errorf("can't get IEnumVARIANT, enum is nil")
	}
	defer enum.Release()

	// Initialize a slice with Count capacity
	dv.Set(reflect.MakeSlice(dv.Type(), 0, int(count)))

	var errFieldMismatch error
	for itemRaw, length, err := enum.Next(1); length > 0; itemRaw, length, err = enum.Next(1) {
		if err != nil {
			return err
		}

		err := func() error {
			// item is a SWbemObject, but really a Win32_Process
			item := itemRaw.ToIDispatch()
			defer item.Release()

			ev := reflect.New(elemType)
			if err = s.cWMIClient.loadEntity(ev.Interface(), item); err != nil {
				if _, ok := err.(*ErrFieldMismatch); ok {
					// We continue loading entities even in the face of field mismatch errors.
					// If we encounter any other error, that other error is returned. Otherwise,
					// an ErrFieldMismatch is returned.
					errFieldMismatch = err
				} else {
					return err
				}
			}
			if mat != multiArgTypeStructPtr {
				ev = ev.Elem()
			}
			dv.Set(reflect.Append(dv, ev))
			return nil
		}()
		if err != nil {
			return err
		}
	}
	//fmt.Println("queryBackground: Finished")
	return errFieldMismatch
}