On Mon, Aug 04, 2014 at 01:59:26PM -0400, Nathaniel W Filardo wrote:
> Greetings list,
>
> The attached patch adds options to new-window, new-session, and split-window
> (commands which create panes) to signal a wait_channel when that pane is
> destroyed, for example after the contained process exits. Towards this end,
> it changes the life-cycle management code in cmd-wait-for.c to allow
> external holds on a wait_channel structure; these are only taken, at the
> moment, by the aforementioned commands.
>
> It's something of an afternoon hack-job, so it might not be ideal.
> Comments and criticisms welcome; rotten tomatoes possibly understood but
> less welcome. ;)
>
> Cheers!
> --nwf;
> diff --git a/cmd-new-session.c b/cmd-new-session.c
> index b36de70..4cf72fc 100644
> --- a/cmd-new-session.c
> +++ b/cmd-new-session.c
> @@ -38,7 +38,7 @@ const struct cmd_entry cmd_new_session_entry = {
> "Ac:dDF:n:Ps:t:x:y:", 0, -1,
No "W" needed here? This seems wrong.
> "[-AdDP] [-c start-directory] [-F format] [-n window-name] "
> "[-s session-name] " CMD_TARGET_SESSION_USAGE " [-x width] "
> - "[-y height] [command]",
> + "[-y height] [-W channel] [command]",
> CMD_STARTSERVER|CMD_CANTNEST,
> NULL,
> cmd_new_session_exec
> @@ -61,6 +61,7 @@ cmd_new_session_exec(struct cmd *self, struct cmd_q *cmdq)
> u_int sx, sy;
> struct format_tree *ft;
> struct environ_entry *envent;
> + struct wait_channel *wc = NULL;
Missing tab character between type and variable.
[...]
> +static struct wait_channel *
> +wait_channel_find_by_name(const char *name) {
> + struct wait_channel wc0;
> +
> + wc0.name = name;
> + return RB_FIND(wait_channels, &wait_channels, &wc0);
You need to cast name here to (char *), as RB_FIND doesn't accept const
char * pointers.
> +}
> +
> +static struct wait_channel *
> +wait_channel_alloc(const char *name) {
> + struct wait_channel *wc = xmalloc(sizeof *wc);
> + wc->name = xstrdup(name);
> + wc->locked = 0;
> + TAILQ_INIT(&wc->waiters);
> + TAILQ_INIT(&wc->lockers);
> + RB_INSERT(wait_channels, &wait_channels, wc);
> +
> + return wc;
return (wc);
> +
> +static void
> +wait_channel_try_free(struct wait_channel *wc) {
> + if (wc->holds > 0)
> + return;
> +
> + if (!TAILQ_EMPTY(&wc->waiters))
> + return;
> +
> + if (!TAILQ_EMPTY(&wc->lockers)) {
> + /* Should we assert that wc->locked == 1 ? */
Why?
> + return;
> + }
> +
> + /* All references to this wait_channel are gone */
> + RB_REMOVE(wait_channels, &wait_channels, wc);
> + free((void*) wc->name);
No need to cast this.
> + free(wc);
> +}
> +
> +static void
> +wait_channel_hold(struct wait_channel *wc) {
> + wc->holds++;
> +}
> +
> +struct wait_channel *
> +wait_channel_hold_by_name(const char *name) {
> + struct wait_channel *wc = wait_channel_find_by_name(name);
> +
> + if(!wc)
if (wc != NULL)
> + wc = wait_channel_alloc(name);
Suggest you call this wait_channel_new();
> +
> + wait_channel_hold(wc);
> +
> + return wc;
return (wc);
> +.Fl W
> +option specifies a channel name which will be signaled when the created pane
> +is destroyed. Clients may use the
New sentences begin on a new line, please.
-- Thomas Adam
--
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not." -- Morrissey ("Girl Least Likely To" -- off of Viva Hate.)
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