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backend/multi: handle backends depending on each other properly

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wl_list_for_each_safe only allows the current list item to be removed.
If a backend destroys itself when another backend is destroyed, this
blows up.
This commit is contained in:
Simon Ser 2020-05-02 16:42:26 +02:00 committed by Drew DeVault
parent e3343cf7d1
commit 7720ce7827
1 changed files with 5 additions and 2 deletions
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7
backend/multi/backend.c
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@ -49,8 +49,11 @@ static void multi_backend_destroy(struct wlr_backend *wlr_backend) {
wl_list_remove(&backend->display_destroy.link);
struct subbackend_state *sub, *next;
wl_list_for_each_safe(sub, next, &backend->backends, link) {
// Some backends may depend on other backends, ie. destroying a backend may
// also destroy other backends
while (!wl_list_empty(&backend->backends)) {
struct subbackend_state *sub =
wl_container_of(backend->backends.next, sub, link);
wlr_backend_destroy(sub->backend);
}