static void qemu_wait_io_event(CPUState *env) { while (!tcg_has_work()) qemu_cond_timedwait(env->halt_cond, &qemu_global_mutex, 1000); qemu_mutex_unlock(&qemu_global_mutex); /* * Users of qemu_global_mutex can be starved, having no chance * to acquire it since this path will get to it first. * So use another lock to provide fairness. */ qemu_mutex_lock(&qemu_fair_mutex); qemu_mutex_unlock(&qemu_fair_mutex); qemu_mutex_lock(&qemu_global_mutex); qemu_wait_io_event_common(env); }