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: handler.go
    path of file: ./repos/csvq/lib/file
    
    the code of the file until where you have to start completion: package file

import (
	"context"
	"fmt"
	"os"
	"time"

	"github.com/mithrandie/go-file/v2"
)

type OpenType int

const (
	ForRead OpenType = iota
	ForCreate
	ForUpdate
)

type Handler struct {
	path string
	fp   *os.File

	openType OpenType

	rlockFile *ControlFile
	lockFile  *ControlFile
	tempFile  *ControlFile

	closed bool
}

func NewHandlerWithoutLock(ctx context.Context, path string, defaultWaitTimeout time.Duration, retryDelay time.Duration) (*Handler, error) {
	tctx, cancel := GetTimeout
    
func NewHandlerForUpdate(ctx context.Context, path string, defaultWaitTimeout time.Duration, retryDelay time.Duration) (*Handler, error) {
	tctx, cancel := GetTimeoutContext(ctx, defaultWaitTimeout)
	defer cancel()

	h := &Handler{
		path:     path,
		openType: ForUpdate,
	}

	if !Exists(h.path) {
		return h, NewNotExistError(fmt.Sprintf("file %s does not exist", h.path))
	}

	if err := h.CreateControlFileContext(tctx, Lock, retryDelay); err != nil {
		return h, closeIsolatedHandler(h, err)
	}

	fp, err := file.OpenToUpdateContext(tctx, retryDelay, path)
	if err != nil {
		return h, closeIsolatedHandler(h, err)
	}
	h.fp = fp

	if err := h.CreateControlFileContext(tctx, Temporary, retryDelay); err != nil {
		return h, closeIsolatedHandler(h, err)
	}
	return h, nil
}