On Wed, Sep 01, 2021 at 10:07:39PM +0900, Akira Yokosawa wrote:
> Listing 13.10 added in commit 42d9b5f32956
> ("together/applyrcu: Add example of retriggering a grace period")
> is too tall for ebook-size builds.
>
> As the \ebresizeverb command used to shrink code snippets requires
> a verbatim element to be fed via \input{}, move the snippet into
> CodeSamples/together/retrigger-gp.c.
> The code snippet is now handled by fcvextract.pl.
>
> Signed-off-by: Akira Yokosawa <akiyks@xxxxxxxxx>
Even better! Thank you, queued and pushed both!
Thanx, Paul
> ---
> CodeSamples/together/retrigger-gp.c | 60 ++++++++++++++++++++++++++++
> together/applyrcu.tex | 61 +----------------------------
> 2 files changed, 61 insertions(+), 60 deletions(-)
> create mode 100644 CodeSamples/together/retrigger-gp.c
>
> diff --git a/CodeSamples/together/retrigger-gp.c b/CodeSamples/together/retrigger-gp.c
> new file mode 100644
> index 00000000..9b315220
> --- /dev/null
> +++ b/CodeSamples/together/retrigger-gp.c
> @@ -0,0 +1,60 @@
> +//\begin{snippet}[labelbase=ln:together:retrigger-gp:whole,commandchars=\\\@\$,tabsize=8]
> +#define RTRG_CLOSED 0
> +#define RTRG_OPEN 1
> +#define RTRG_CLOSING 2
> +#define RTRG_REOPENING 3
> +#define RTRG_RECLOSING 4
> +
> +int rtrg_status;
> +DEFINE_SPINLOCK(rtrg_lock);
> +struct rcu_head rtrg_rh;
> +
> +void close_cb(struct rcu_head *rhp)
> +{
> + spin_lock(rtrg_lock);
> + if (rtrg_status = RTRG_CLOSING) {
> + close_cleanup();
> + rtrg_status = RTRG_CLOSED;
> + } else if (rtrg_status == RTRG_REOPENING) {
> + rtrg_status = RTRG_OPEN;
> + } else if (rtrg_status == RTRG_RECLOSING) {
> + rtrg_status = RTRG_CLOSING;
> + call_rcu(&rtrg_rh, close_cb);
> + } else {
> + WARN_ON_ONCE(1);
> + }
> + spin_unlock(rtrg_lock);
> +}
> +
> +int open(void)
> +{
> + spin_lock(rtrg_lock);
> + if (rtrg_status == RTRG_CLOSED) {
> + rtrg_status = RTRG_OPEN;
> + } else if (rtrg_status == RTRG_CLOSING ||
> + rtrg_status == RTRG_RECLOSING) {
> + rtrg_status = RTRG_REOPENING;
> + } else {
> + spin_unlock(rtrg_lock);
> + return -EBUSY;
> + }
> + do_open();
> + spin_unlock(rtrg_lock);
> +}
> +
> +int close(void)
> +{
> + spin_lock(rtrg_lock);
> + if (rtrg_status == RTRG_OPEN) {
> + rtrg_status = RTRG_CLOSING;
> + call_rcu(&rtrg_rh, close_cb);
> + } else if (rtrg_status == RTRG_REOPENING) {
> + rtrg_status = RTRG_RECLOSING;
> + } else {
> + spin_unlock(rtrg_lock);
> + return -ENOENT;
> + }
> + do_close();
> + spin_unlock(rtrg_lock);
> +}
> +//\end{snippet}
> diff --git a/together/applyrcu.tex b/together/applyrcu.tex
> index f9116055..769250ae 100644
> --- a/together/applyrcu.tex
> +++ b/together/applyrcu.tex
> @@ -701,66 +701,7 @@ either of the CLOSING or the OPEN state, depending on which of the
> RECLOSING or REOPENING states the callback was invoked in.
>
> \begin{listing}
> -\begin{VerbatimL}[tabsize=8]
> -#define RTRG_CLOSED 0
> -#define RTRG_OPEN 1
> -#define RTRG_CLOSING 2
> -#define RTRG_REOPENING 3
> -#define RTRG_RECLOSING 4
> -
> -int rtrg_status;
> -DEFINE_SPINLOCK(rtrg_lock);
> -struct rcu_head rtrg_rh;
> -
> -void close_cb(struct rcu_head *rhp)
> -{
> - spin_lock(rtrg_lock);
> - if (rtrg_status = RTRG_CLOSING) {
> - close_cleanup();
> - rtrg_status = RTRG_CLOSED;
> - } else if (rtrg_status == RTRG_REOPENING) {
> - rtrg_status = RTRG_OPEN;
> - } else if (rtrg_status == RTRG_RECLOSING) {
> - rtrg_status = RTRG_CLOSING;
> - call_rcu(&rtrg_rh, close_cb);
> - } else {
> - WARN_ON_ONCE(1);
> - }
> - spin_unlock(rtrg_lock);
> -}
> -
> -int open(void)
> -{
> - spin_lock(rtrg_lock);
> - if (rtrg_status == RTRG_CLOSED) {
> - rtrg_status = RTRG_OPEN;
> - } else if (rtrg_status == RTRG_CLOSING ||
> - rtrg_status == RTRG_RECLOSING) {
> - rtrg_status = RTRG_REOPENING;
> - } else {
> - spin_unlock(rtrg_lock);
> - return -EBUSY;
> - }
> - do_open();
> - spin_unlock(rtrg_lock);
> -}
> -
> -int close(void)
> -{
> - spin_lock(rtrg_lock);
> - if (rtrg_status == RTRG_OPEN) {
> - rtrg_status = RTRG_CLOSING;
> - call_rcu(&rtrg_rh, close_cb);
> - } else if (rtrg_status == RTRG_REOPENING) {
> - rtrg_status = RTRG_RECLOSING;
> - } else {
> - spin_unlock(rtrg_lock);
> - return -ENOENT;
> - }
> - do_close();
> - spin_unlock(rtrg_lock);
> -}
> -\end{VerbatimL}
> +\ebresizeverb{.88}{\input{CodeSamples/together/retrigger-gp@xxxxxxxxx}}
> \caption{Retriggering a Grace Period (Pseudocode)}
> \label{lst:together:Retriggering a Grace Period}
> \end{listing}
> --
> 2.17.1
>
