Remove timerfd from loop implementation

timerfd doesn't work on the BSDs, so this replaces it with a timespec
for the expiry and uses a poll timeout to check the timers when needed.

include/loop.h

@@ -5,12 +5,12 @@
 /**
  * This is an event loop system designed for sway clients, not sway itself.
  *
- * It uses pollfds to block on multiple file descriptors at once, and provides
- * an easy way to set timers. Typically the Wayland display's fd will be one of
- * the fds in the loop.
+ * The loop consists of file descriptors and timers. Typically the Wayland
+ * display's file descriptor will be one of the fds in the loop.
  */
 
 struct loop;
+struct loop_timer;
 
 /**
  * Create an event loop.
@@ -28,20 +28,27 @@ void loop_destroy(struct loop *loop);
 void loop_poll(struct loop *loop);
 
 /**
- * Add an fd to the loop.
+ * Add a file descriptor to the loop.
  */
-struct loop_event *loop_add_fd(struct loop *loop, int fd, short mask,
+void loop_add_fd(struct loop *loop, int fd, short mask,
 		void (*func)(int fd, short mask, void *data), void *data);
 
 /**
  * Add a timer to the loop.
+ *
+ * When the timer expires, the timer will be removed from the loop and freed.
  */
-struct loop_event *loop_add_timer(struct loop *loop, int ms,
-		void (*callback)(int fd, short mask, void *data), void *data);
+struct loop_timer *loop_add_timer(struct loop *loop, int ms,
+		void (*callback)(void *data), void *data);
 
 /**
- * Remove an event from the loop.
+ * Remove a file descriptor from the loop.
  */
-bool loop_remove_event(struct loop *loop, struct loop_event *event);
+bool loop_remove_fd(struct loop *loop, int fd);
+
+/**
+ * Remove a timer from the loop.
+ */
+bool loop_remove_timer(struct loop *loop, struct loop_timer *timer);
 
 #endif

include/swaybar/bar.h

@@ -69,7 +69,6 @@ struct swaybar {
 	struct status_line *status;
 
 	struct loop *eventloop;
-	struct loop_event *status_event;
 
 	int ipc_event_socketfd;
 	int ipc_socketfd;

include/swaylock/swaylock.h

@@ -55,9 +55,9 @@ struct swaylock_password {
 
 struct swaylock_state {
 	struct loop *eventloop;
-	struct loop_event *clear_indicator_timer; // clears the indicator
-	struct loop_event *clear_password_timer;  // clears the password buffer
-	struct loop_event *verify_password_timer;
+	struct loop_timer *clear_indicator_timer; // clears the indicator
+	struct loop_timer *clear_password_timer;  // clears the password buffer
+	struct loop_timer *verify_password_timer;
 	struct wl_display *display;
 	struct wl_compositor *compositor;
 	struct zwlr_layer_shell_v1 *layer_shell;