hwt_backend_thread_free
.hwt_backend_thread_free = pt_backend_free_thread,
.hwt_backend_thread_free = spe_backend_thread_free,
if (thr->backend->ops->hwt_backend_thread_free == NULL)
thr->backend->ops->hwt_backend_thread_free(thr);
void (*hwt_backend_thread_free)(struct hwt_thread *);
void hwt_backend_thread_free(struct hwt_thread *);
hwt_backend_thread_free(thr);