Unify the way sessions are used by callbacks - store the address and use

the reference count, then check it is still on the global sessions list
in the callback.

1 files changed, 1 insertions, 0 deletions

diff --git a/tmux.h b/tmux.h
index 11665195..0f36c92e 100644
--- a/tmux.h
+++ b/tmux.h
@@ -1968,6 +1968,7 @@ void clear_signals(int);
 extern struct sessions sessions;
 extern struct sessions dead_sessions;
 extern struct session_groups session_groups;
+int		 session_alive(struct session *);
 struct session	*session_find(const char *);
 struct session	*session_create(const char *, const char *, const char *,
 		     struct environ *, struct termios *, int, u_int, u_int,