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usb: Skip add/remove of FD on destroyed source 

This avoids nasty GLib-CRITICALs on Windows with some drivers.
This commit is contained in:
Daniel Elstner 2015-10-02 00:36:10 +02:00
parent e2eaf8580a
commit 5eff221e8c
1 changed files with 8 additions and 2 deletions
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10
src/usb.c
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@ -184,6 +184,9 @@ static LIBUSB_CALL void usb_pollfd_added(libusb_os_handle fd,
usource = user_data;
if (G_UNLIKELY(g_source_is_destroyed(&usource->base)))
return;
pollfd = g_slice_new(GPollFD);
#ifdef G_OS_WIN32
events = G_IO_IN;
@ -193,7 +196,7 @@ static LIBUSB_CALL void usb_pollfd_added(libusb_os_handle fd,
pollfd->revents = 0;
g_ptr_array_add(usource->pollfds, pollfd);
g_source_add_poll((GSource *)usource, pollfd);
g_source_add_poll(&usource->base, pollfd);
}
/** Callback invoked when a libusb FD should be removed from the poll set.
@ -206,13 +209,16 @@ static LIBUSB_CALL void usb_pollfd_removed(libusb_os_handle fd, void *user_data)
usource = user_data;
if (G_UNLIKELY(g_source_is_destroyed(&usource->base)))
return;
/* It's likely that the removed poll FD is at the end.
*/
for (i = usource->pollfds->len; G_LIKELY(i > 0); i--) {
pollfd = g_ptr_array_index(usource->pollfds, i - 1);
if ((libusb_os_handle)pollfd->fd == fd) {
g_source_remove_poll((GSource *)usource, pollfd);
g_source_remove_poll(&usource->base, pollfd);
g_ptr_array_remove_index_fast(usource->pollfds, i - 1);
return;
}