libusbhost: Add callback to usb_host_run to notify when initial device discovery is done
This can be used to eliminate race conditions in clients that operate immediately
on the currently connected device list.
Signed-off-by: Mike Lockwood <lockwood@android.com>
Change-Id: I14954b9fcc84239950ead6bdc1a0a888882c2226
diff --git a/libusbhost/usbhost.c b/libusbhost/usbhost.c
index efd3103..f5ec140 100644
--- a/libusbhost/usbhost.c
+++ b/libusbhost/usbhost.c
@@ -144,6 +144,7 @@
void usb_host_run(struct usb_host_context *context,
usb_device_added_cb added_cb,
usb_device_removed_cb removed_cb,
+ usb_discovery_done_cb discovery_done_cb,
void *client_data)
{
struct inotify_event* event;
@@ -174,6 +175,8 @@
/* check for existing devices first, after we have inotify set up */
done = find_existing_devices(added_cb, removed_cb, client_data);
+ if (discovery_done_cb)
+ done |= discovery_done_cb(client_data);
while (!done) {
ret = read(context->fd, event_buf, sizeof(event_buf));