static int binder_ioctl_freeze()

in binder.c [4987:5033]

• 35 lines of code
• 6 McCabe index (conditional complexity)

static int binder_ioctl_freeze(struct binder_freeze_info *info,
			       struct binder_proc *target_proc)
{
	int ret = 0;

	if (!info->enable) {
		binder_inner_proc_lock(target_proc);
		target_proc->sync_recv = false;
		target_proc->async_recv = false;
		target_proc->is_frozen = false;
		binder_inner_proc_unlock(target_proc);
		return 0;
	}

	/*
	 * Freezing the target. Prevent new transactions by
	 * setting frozen state. If timeout specified, wait
	 * for transactions to drain.
	 */
	binder_inner_proc_lock(target_proc);
	target_proc->sync_recv = false;
	target_proc->async_recv = false;
	target_proc->is_frozen = true;
	binder_inner_proc_unlock(target_proc);

	if (info->timeout_ms > 0)
		ret = wait_event_interruptible_timeout(
			target_proc->freeze_wait,
			(!target_proc->outstanding_txns),
			msecs_to_jiffies(info->timeout_ms));

	/* Check pending transactions that wait for reply */
	if (ret >= 0) {
		binder_inner_proc_lock(target_proc);
		if (binder_txns_pending_ilocked(target_proc))
			ret = -EAGAIN;
		binder_inner_proc_unlock(target_proc);
	}

	if (ret < 0) {
		binder_inner_proc_lock(target_proc);
		target_proc->is_frozen = false;
		binder_inner_proc_unlock(target_proc);
	}

	return ret;
}