From 97d0a6dfe6a3ba82adbc548f5708c73af19b5794 Mon Sep 17 00:00:00 2001
From: Bastien Nocera <hadess@hadess.net>
Date: Thu, 11 Oct 2018 17:20:38 +0200
Subject: [PATCH] lib: Add fpi_poll_is_setup() sanity check

This checks whether polling was correctly setup for integration with a
mainloop.
---
 libfprint/fpi-poll.c | 6 ++++++
 libfprint/fpi-poll.h | 2 ++
 2 files changed, 8 insertions(+)

diff --git a/libfprint/fpi-poll.c b/libfprint/fpi-poll.c
index 2f2d1f1d..ed81a4f0 100644
--- a/libfprint/fpi-poll.c
+++ b/libfprint/fpi-poll.c
@@ -482,6 +482,12 @@ void fpi_poll_exit(void)
 	libusb_set_pollfd_notifiers(fpi_usb_ctx, NULL, NULL, NULL);
 }
 
+gboolean
+fpi_poll_is_setup(void)
+{
+	return (fd_added_cb != NULL && fd_removed_cb != NULL);
+}
+
 void
 fpi_timeout_cancel_all_for_dev(struct fp_dev *dev)
 {
diff --git a/libfprint/fpi-poll.h b/libfprint/fpi-poll.h
index 2682f277..77c5eabe 100644
--- a/libfprint/fpi-poll.h
+++ b/libfprint/fpi-poll.h
@@ -48,4 +48,6 @@ void fpi_timeout_set_name(fpi_timeout *timeout,
 			  const char  *name);
 void fpi_timeout_cancel(fpi_timeout *timeout);
 
+gboolean fpi_poll_is_setup(void);
+
 #endif