poller-pa.c: abandon the idea of quitting the loop

There are no users of this API in practice,
and it prevents making the libpulse dependency optional.

paswitch.c

@@ -143,6 +143,7 @@ struct app_context
 	struct poller_timer tty_timer;      ///< Terminal input timeout
 	struct str tty_input_buffer;        ///< Buffered terminal input
 
+	bool quitting;                      ///< Quitting requested
 	pa_mainloop_api *api;               ///< PulseAudio event loop proxy
 	pa_context *context;                ///< PulseAudio connection context
 
@@ -683,7 +684,7 @@ on_action (struct app_context *ctx, enum action action)
 		break;
 
 	case ACTION_QUIT:
-		poller_pa_quit (ctx->api, 0);
+		ctx->quitting = true;
 	case ACTION_NONE:
 		break;
 	}
@@ -910,7 +911,7 @@ on_signal_pipe_readable (const struct pollfd *pfd, struct app_context *ctx)
 	(void) read (pfd->fd, &id, 1);
 
 	if (id == SIGINT || id == SIGTERM || id == SIGHUP)
-		poller_pa_quit (ctx->api, 0);
+		ctx->quitting = true;
 	else if (id == SIGWINCH)
 		poller_idle_set (&ctx->redraw_event);
 	else
@@ -1068,7 +1069,9 @@ main (int argc, char *argv[])
 	poller_timer_init_and_set (&ctx.make_context, &ctx.poller,
 		on_make_context, &ctx);
 
-	int status = poller_pa_run (ctx.api);
+	while (!ctx.quitting)
+		poller_run (&ctx.poller);
+
 	app_context_free (&ctx);
-	return status;
+	return 0;
 }

poller-pa.c

@@ -59,9 +59,6 @@ struct pa_defer_event
 struct poller_pa
 {
 	struct poller *poller;              ///< The underlying event loop
-	int result;                         ///< Result on quit
-	bool running;                       ///< Not quitting
-
 	pa_io_event *io_list;               ///< I/O events
 	pa_time_event *time_list;           ///< Timer events
 	pa_defer_event *defer_list;         ///< Deferred events
@@ -293,9 +290,11 @@ poller_pa_defer_set_destroy (pa_defer_event *self,
 static void
 poller_pa_quit (pa_mainloop_api *api, int retval)
 {
-	struct poller_pa *data = api->userdata;
-	data->result = retval;
-	data->running = false;
+	(void) api;
+	(void) retval;
+
+	// This is not called from within libpulse
+	hard_assert (!"quitting the libpulse event loop is unimplemented");
 }
 
 // - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
@@ -347,15 +346,3 @@ poller_pa_destroy (struct pa_mainloop_api *api)
 	free (data);
 	free (api);
 }
-
-/// Since our poller API doesn't care much about continuous operation,
-/// we need to provide that in the PulseAudio abstraction itself
-static int
-poller_pa_run (struct pa_mainloop_api *api)
-{
-	struct poller_pa *data = api->userdata;
-	data->running = true;
-	while (data->running)
-		poller_run (data->poller);
-	return data->result;
-}

wmstatus.c

@@ -2745,7 +2745,8 @@ main (int argc, char *argv[])
 
 	if (ctx.backend->start)
 		ctx.backend->start (ctx.backend);
-	poller_pa_run (ctx.api);
+	while (true)
+		poller_run (&ctx.poller);
 	if (ctx.backend->stop)
 		ctx.backend->stop (ctx.backend);