C++ (Cpp) _mdp_copy_hist_dataの例

コード例 #1

static int mdp_do_histogram(struct fb_info *info, struct mdp_histogram *hist)
{
	int ret = 0;

	if (!hist->frame_cnt || (hist->bin_cnt == 0))
		return -EINVAL;

	if ((mdp_rev <= MDP_REV_41 && hist->bin_cnt > MDP_REV41_HIST_MAX_BIN)
		|| (mdp_rev == MDP_REV_42 &&
		hist->bin_cnt > MDP_REV42_HIST_MAX_BIN))
		return -EINVAL;

	mutex_lock(&mdp_hist_mutex);
	if (!mdp_is_hist_data) {
		pr_err("%s - histogram not ready\n", __func__);
		ret = -EPERM;
		goto error;
	}

	if (!mdp_is_hist_start) {
		pr_err("%s histogram not started\n", __func__);
		ret = -EPERM;
		goto error;
	}

	mdp_hist_frame_cnt = hist->frame_cnt;
	mutex_unlock(&mdp_hist_mutex);

	if (wait_for_completion_killable(&mdp_hist_comp)) {
		pr_err("%s(): histogram bin collection killed", __func__);
		return -EINVAL;
	}

	mutex_lock(&mdp_hist_mutex);
	if (mdp_is_hist_data && mdp_is_hist_init)
		ret =  _mdp_copy_hist_data(hist);

error:
	mutex_unlock(&mdp_hist_mutex);
	return ret;
}

コード例 #2

static int mdp_do_histogram(struct fb_info *info, struct mdp_histogram *hist)
{
	int ret = 0;

	if (!hist->frame_cnt || (hist->bin_cnt == 0))
		return -EINVAL;

	if ((mdp_rev <= MDP_REV_41 && hist->bin_cnt > MDP_REV41_HIST_MAX_BIN)
		|| (mdp_rev == MDP_REV_42 &&
		hist->bin_cnt > MDP_REV42_HIST_MAX_BIN))
		return -EINVAL;

	mutex_lock(&mdp_hist_mutex);
	if (!mdp_is_hist_data) {
		ret = -EINVAL;
		goto error;
	}

	if (!mdp_is_hist_start) {
		printk(KERN_ERR "%s histogram not started\n", __func__);
		ret = -EPERM;
		goto error;
	}

	INIT_COMPLETION(mdp_hist_comp);
	mdp_hist_frame_cnt = hist->frame_cnt;
	mutex_unlock(&mdp_hist_mutex);

	wait_for_completion_killable(&mdp_hist_comp);

	mutex_lock(&mdp_hist_mutex);
	if (mdp_is_hist_data)
		ret =  _mdp_copy_hist_data(hist);
error:
	mutex_unlock(&mdp_hist_mutex);
	return ret;
}