mirror of
https://github.com/facebook/rocksdb.git
synced 2024-11-25 22:44:05 +00:00
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
62 lines
1.6 KiB
C++
62 lines
1.6 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.
|
|
#pragma once
|
|
|
|
#include "table/internal_iterator.h"
|
|
#include "port/port.h"
|
|
|
|
namespace ROCKSDB_NAMESPACE {
|
|
class ScopedArenaIterator {
|
|
|
|
void reset(InternalIterator* iter) ROCKSDB_NOEXCEPT {
|
|
if (iter_ != nullptr) {
|
|
iter_->~InternalIterator();
|
|
}
|
|
iter_ = iter;
|
|
}
|
|
|
|
public:
|
|
|
|
explicit ScopedArenaIterator(InternalIterator* iter = nullptr)
|
|
: iter_(iter) {}
|
|
|
|
ScopedArenaIterator(const ScopedArenaIterator&) = delete;
|
|
ScopedArenaIterator& operator=(const ScopedArenaIterator&) = delete;
|
|
|
|
ScopedArenaIterator(ScopedArenaIterator&& o) ROCKSDB_NOEXCEPT {
|
|
iter_ = o.iter_;
|
|
o.iter_ = nullptr;
|
|
}
|
|
|
|
ScopedArenaIterator& operator=(ScopedArenaIterator&& o) ROCKSDB_NOEXCEPT {
|
|
reset(o.iter_);
|
|
o.iter_ = nullptr;
|
|
return *this;
|
|
}
|
|
|
|
InternalIterator* operator->() { return iter_; }
|
|
InternalIterator* get() { return iter_; }
|
|
|
|
void set(InternalIterator* iter) { reset(iter); }
|
|
|
|
InternalIterator* release() {
|
|
assert(iter_ != nullptr);
|
|
auto* res = iter_;
|
|
iter_ = nullptr;
|
|
return res;
|
|
}
|
|
|
|
~ScopedArenaIterator() {
|
|
reset(nullptr);
|
|
}
|
|
|
|
private:
|
|
InternalIterator* iter_;
|
|
};
|
|
} // namespace ROCKSDB_NAMESPACE
|