Add "grouped sessions" which have independent name, options, current window and

so on but where the linked windows are synchronized (ie creating, killing
windows and so on are mirrored between the sessions). A grouped session may be
created by passing -t to new-session.

Had this around for a while, tested by a couple of people.

1 files changed, 23 insertions, 3 deletions

diff --git a/tmux.h b/tmux.h
index 9fd864f5..f4a25b5d 100644
--- a/tmux.h
+++ b/tmux.h
@@ -739,10 +739,10 @@ struct winlink {
 	struct window	*window;
 
 	RB_ENTRY(winlink) entry;
-	SLIST_ENTRY(winlink) sentry;
+	TAILQ_ENTRY(winlink) sentry;
 };
 RB_HEAD(winlinks, winlink);
-SLIST_HEAD(winlink_stack, winlink);
+TAILQ_HEAD(winlink_stack, winlink);
 
 /* Layout direction. */
 enum layout_type {
@@ -797,6 +797,13 @@ struct session_alert {
 	SLIST_ENTRY(session_alert) entry;
 };
 
+struct session_group {
+	TAILQ_HEAD(, session) sessions;
+
+	TAILQ_ENTRY(session_group) entry;
+};
+TAILQ_HEAD(session_groups, session_group);
+
 struct session {
 	char		*name;
 	struct timeval	 tv;
@@ -824,6 +831,8 @@ struct session {
 	struct environ	 environ;
 
 	int		 references;
+
+	TAILQ_ENTRY(session) gentry;
 };
 ARRAY_DECL(sessions, struct session *);
 
@@ -1456,7 +1465,9 @@ void	 server_write_session(
 void	 server_redraw_client(struct client *);
 void	 server_status_client(struct client *);
 void	 server_redraw_session(struct session *);
+void	 server_redraw_session_group(struct session *);
 void	 server_status_session(struct session *);
+void	 server_status_session_group(struct session *);
 void	 server_redraw_window(struct window *);
 void	 server_status_window(struct window *);
 void	 server_lock(void);
@@ -1464,9 +1475,10 @@ void	 server_lock_session(struct session *);
 void	 server_lock_client(struct client *);
 int	 server_unlock(const char *);
 void	 server_kill_window(struct window *);
-int	 server_link_window(
+int	 server_link_window(struct session *,
 	     struct winlink *, struct session *, int, int, int, char **);
 void	 server_unlink_window(struct session *, struct winlink *);
+void	 server_destroy_session_group(struct session *);
 void	 server_destroy_session(struct session *);
 void	 server_set_identify(struct client *);
 void	 server_clear_identify(struct client *);
@@ -1719,6 +1731,7 @@ char 		*default_window_name(struct window *);
 /* session.c */
 extern struct sessions sessions;
 extern struct sessions dead_sessions;
+extern struct session_groups session_groups;
 void	 session_alert_add(struct session *, struct window *, int);
 void	 session_alert_cancel(struct session *, struct winlink *);
 int	 session_alert_has(struct session *, struct winlink *, int);
@@ -1739,6 +1752,13 @@ int		 session_next(struct session *, int);
 int		 session_previous(struct session *, int);
 int		 session_select(struct session *, int);
 int		 session_last(struct session *);
+struct session_group *session_group_find(struct session *);
+u_int		 session_group_index(struct session_group *);
+void		 session_group_add(struct session *, struct session *);
+void		 session_group_remove(struct session *);
+void		 session_group_synchronize_to(struct session *);
+void		 session_group_synchronize_from(struct session *);
+void		 session_group_synchronize1(struct session *, struct session *);
 
 /* utf8.c */
 void	utf8_build(void);