tree 9feb6fc39e33979a93ed4e4aadb6d84b68a61977
parent 23d8bc5a64312d4e1e233fd04844cc22a6bb512d
author Giulio Camuffo <giuliocamuffo@gmail.com> 1485268468 +0200
committer Pekka Paalanen <pekka.paalanen@collabora.co.uk> 1485344783 +0200

server: add a safer signal type and port wl_display to it

wl_list_for_each_safe, which is used by wl_signal_emit is not really
safe. If a signal has two listeners, and the first one removes and
re-inits the second one, it would enter an infinite loop, which was hit
in weston on resource destruction, which emits a signal.
This commit adds a new version of wl_signal, called wl_priv_signal,
which is private in wayland-server.c and which does not have this problem.
The old wl_signal cannot be improved without breaking backwards compatibility.

Signed-off-by: Giulio Camuffo <giulio.camuffo@kdab.com>
Reviewed-by: Pekka Paalanen <pekka.paalanen@collabora.co.uk>