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: bguploader.go
    path of file: ./repos/wal-g/internal/databases/postgres
    
    the code of the file until where you have to start completion: package postgres

import (
	"context"
	"os"
	"path/filepath"
	"strings"
	"sync/ato
    
func (b *BgUploader) upload(ctx context.Context, walStatusFilename string) bool {
	walFilename := strings.TrimSuffix(walStatusFilename, readySuffix)
	err := uploadWALFile(ctx, b.uploader.clone(), filepath.Join(b.dir, walFilename), b.preventWalOverwrite)
	if err != nil {
		tracelog.ErrorLogger.Print("Error of background uploader: ", err)
		return false
	}

	err = b.uploader.ArchiveStatusManager.MarkWalUploaded(walFilename)
	if err != nil {
		tracelog.ErrorLogger.Printf("Error marking wal file %s as uploaded: %v", walFilename, err)
	}

	// rename WAL status file ".ready" to ".done" if requested
	if b.readyRename && err == nil {
		err := b.uploader.PGArchiveStatusManager.RenameReady(walFilename)
		// error here is not a fatal thing, just a bit more work for the next wal-push
		tracelog.ErrorLogger.PrintOnError(err)
	}

	return true
}