| // Licensed to the Apache Software Foundation (ASF) under one |
| // or more contributor license agreements. See the NOTICE file |
| // distributed with this work for additional information |
| // regarding copyright ownership. The ASF licenses this file |
| // to you under the Apache License, Version 2.0 (the |
| // "License"); you may not use this file except in compliance |
| // with the License. You may obtain a copy of the License at |
| // |
| // http://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, |
| // software distributed under the License is distributed on an |
| // "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| // KIND, either express or implied. See the License for the |
| // specific language governing permissions and limitations |
| // under the License. |
| |
| #include "kudu/common/iterator_stats.h" |
| |
| #include "kudu/gutil/strings/substitute.h" |
| #include "kudu/util/status.h" |
| |
| namespace kudu { |
| |
| using std::string; |
| using strings::Substitute; |
| |
| IteratorStats::IteratorStats() |
| : data_blocks_read_from_disk(0), |
| bytes_read_from_disk(0), |
| cells_read_from_disk(0) { |
| } |
| |
| string IteratorStats::ToString() const { |
| return Substitute("data_blocks_read_from_disk=$0 " |
| "bytes_read_from_disk=$1 " |
| "cells_read_from_disk=$2", |
| data_blocks_read_from_disk, |
| bytes_read_from_disk, |
| cells_read_from_disk); |
| } |
| |
| void IteratorStats::AddStats(const IteratorStats& other) { |
| data_blocks_read_from_disk += other.data_blocks_read_from_disk; |
| bytes_read_from_disk += other.bytes_read_from_disk; |
| cells_read_from_disk += other.cells_read_from_disk; |
| DCheckNonNegative(); |
| } |
| |
| void IteratorStats::SubtractStats(const IteratorStats& other) { |
| data_blocks_read_from_disk -= other.data_blocks_read_from_disk; |
| bytes_read_from_disk -= other.bytes_read_from_disk; |
| cells_read_from_disk -= other.cells_read_from_disk; |
| DCheckNonNegative(); |
| } |
| |
| void IteratorStats::DCheckNonNegative() const { |
| DCHECK_GE(data_blocks_read_from_disk, 0); |
| DCHECK_GE(bytes_read_from_disk, 0); |
| DCHECK_GE(cells_read_from_disk, 0); |
| } |
| |
| |
| } // namespace kudu |