Move swaybar's event loop to common directory and refactor

* The loop functions are now prefixed with `loop_`.
* It is now easy to add timers to the loop.
* Timers are implemented using pollfd and timerfd, rather than manually
checking them when any other event happens to arrive.

1 files changed, 2 insertions, 0 deletions

diff --git a/include/swaybar/status_line.h b/include/swaybar/status_line.h
index 5e7e8771..957a808e 100644
--- a/include/swaybar/status_line.h
+++ b/include/swaybar/status_line.h
@@ -14,6 +14,8 @@ enum status_protocol {
 };
 
 struct status_line {
+        struct swaybar *bar;
+
         pid_t pid;
         int read_fd, write_fd;
         FILE *read, *write;