fdf882ded2
Summary: When dynamically linking two binaries together, different builds of RocksDB from two sources might cause errors. To provide a tool for user to solve the problem, the RocksDB namespace is changed to a flag which can be overridden in build time. Pull Request resolved: https://github.com/facebook/rocksdb/pull/6433 Test Plan: Build release, all and jtest. Try to build with ROCKSDB_NAMESPACE with another flag. Differential Revision: D19977691 fbshipit-source-id: aa7f2d0972e1c31d75339ac48478f34f6cfcfb3e
50 lines
1.9 KiB
C++
50 lines
1.9 KiB
C++
// Copyright (c) 2011-present, Facebook, Inc. All rights reserved.
|
|
// This source code is licensed under both the GPLv2 (found in the
|
|
// COPYING file in the root directory) and Apache 2.0 License
|
|
// (found in the LICENSE.Apache file in the root directory).
|
|
// Copyright (c) 2011 The LevelDB Authors. All rights reserved.
|
|
// Use of this source code is governed by a BSD-style license that can be
|
|
// found in the LICENSE file. See the AUTHORS file for names of contributors.
|
|
|
|
#include "monitoring/in_memory_stats_history.h"
|
|
#include "db/db_impl/db_impl.h"
|
|
|
|
namespace ROCKSDB_NAMESPACE {
|
|
|
|
InMemoryStatsHistoryIterator::~InMemoryStatsHistoryIterator() {}
|
|
|
|
bool InMemoryStatsHistoryIterator::Valid() const { return valid_; }
|
|
|
|
Status InMemoryStatsHistoryIterator::status() const { return status_; }
|
|
|
|
// Because of garbage collection, the next stats snapshot may or may not be
|
|
// right after the current one. When reading from DBImpl::stats_history_, this
|
|
// call will be protected by DB Mutex so it will not return partial or
|
|
// corrupted results.
|
|
void InMemoryStatsHistoryIterator::Next() {
|
|
// increment start_time by 1 to avoid infinite loop
|
|
AdvanceIteratorByTime(GetStatsTime() + 1, end_time_);
|
|
}
|
|
|
|
uint64_t InMemoryStatsHistoryIterator::GetStatsTime() const { return time_; }
|
|
|
|
const std::map<std::string, uint64_t>&
|
|
InMemoryStatsHistoryIterator::GetStatsMap() const {
|
|
return stats_map_;
|
|
}
|
|
|
|
// advance the iterator to the next time between [start_time, end_time)
|
|
// if success, update time_ and stats_map_ with new_time and stats_map
|
|
void InMemoryStatsHistoryIterator::AdvanceIteratorByTime(uint64_t start_time,
|
|
uint64_t end_time) {
|
|
// try to find next entry in stats_history_ map
|
|
if (db_impl_ != nullptr) {
|
|
valid_ =
|
|
db_impl_->FindStatsByTime(start_time, end_time, &time_, &stats_map_);
|
|
} else {
|
|
valid_ = false;
|
|
}
|
|
}
|
|
|
|
} // namespace ROCKSDB_NAMESPACE
|