mylog_flush() {
 
 local log_file="$1"
 local lock_file="$2"
 
 [ -z "$counter" ] && return
 
 # $logfile bei Bedarf oeffnen
 [ -n "$LOG_FD" ] || exec {LOG_FD}<>$lock_file
 
 dbg "logbuffer flush, logbuffer_count: ${#logbuffer} counter: ${counter}"  
 local i
 if flock --exclusive --timeout 10 $LOG_FD ;then
         for((i=0;i<$counter;i++));do
                 dbg "writing line >${logbuffer[$i]}< ..." 
                 echo "${logbuffer[$i]}" >>$log_file
         done
         logbuffer=()
         counter=0
         flock --unlock $LOG_FD
 fi
}