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\input{configpres}
\title{klist}
\maketitle
\subsection{klist}
\begin{frame}
\frametitle{Overview}
\tableofcontents
\end{frame}
\subsubsection{What is it?}
\begin{frame}
\frametitle{klist functionality}
\begin{itemize}
\item Type oblivious - use with any data structure you have in mind
\item Doubly linked list
\item Iterations, etc. are easily readable
\end{itemize}
\end{frame}
\subsubsection{Usage}
\begin{frame}[fragile]
\frametitle{Initialization}
\begin{lstlisting}
struct my_elem {
int member1;
long member2;
struct list_head node;
};
/* the following is the same as
* struct list_head mylist;
* INIT_LIST_HEAD(&mylist.list);
*/
LIST_HEAD(mylist);
\end{lstlisting}
\end{frame}
\begin{frame}[fragile]
\frametitle{Add elements}
\begin{lstlisting}
struct my_elem *e;
while( .. ) {
e = kzalloc(sizeof(*e), GFP_KERNEL);
e->member1 = 3;
/* add element to the beginning of the list */
list_add(&e->node, &mylist);
/* to add element to the tail of the list use
* list_add_tail(&e->node, &mylist);
*/
}
\end{lstlisting}
\end{frame}
\begin{frame}[fragile]
\frametitle{Iterate over list}
\begin{lstlisting}
struct my_elem *iterator, tmp;
/* last argument is name of struct list_head inside mylist */
list_for_each_entry(iterator, &mylist, node) {
iterator->member1 = 0x08;
iterator->member2 = 0x15;
}
\end{lstlisting}
\pause
\begin{lstlisting}
list_for_each_entry_reverse(iterator, &mylist, node)
iterator->member1 = 0x08;
\end{lstlisting}
\pause
\begin{lstlisting}
/* clear list and free elements
* _safe allows modificatio of the list during iteration
*/
list_for_each_entry_safe(iterator, tmp, &mylist, node) {
list_del(&iterator->node);
kfree(iterator);
}
\end{lstlisting}
\end{frame}
\begin{frame}
\frametitle{There are a lot of helpers!}
see: include/linux/list.h
\end{frame}
\input{tailpres}
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