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
43 lines
1.3 KiB
C++
43 lines
1.3 KiB
C++
// Copyright (c) 2011-present, Facebook, Inc. All rights reserved.
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// This source code is licensed under both the GPLv2 (found in the
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// COPYING file in the root directory) and Apache 2.0 License
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// (found in the LICENSE.Apache file in the root directory).
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//
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#pragma once
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#include "db/dbformat.h"
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#include "table/iterator_wrapper.h"
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namespace ROCKSDB_NAMESPACE {
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// When used with std::priority_queue, this comparison functor puts the
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// iterator with the max/largest key on top.
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class MaxIteratorComparator {
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public:
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MaxIteratorComparator(const InternalKeyComparator* comparator)
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: comparator_(comparator) {}
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bool operator()(IteratorWrapper* a, IteratorWrapper* b) const {
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return comparator_->Compare(a->key(), b->key()) < 0;
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}
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private:
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const InternalKeyComparator* comparator_;
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};
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// When used with std::priority_queue, this comparison functor puts the
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// iterator with the min/smallest key on top.
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class MinIteratorComparator {
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public:
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MinIteratorComparator(const InternalKeyComparator* comparator)
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: comparator_(comparator) {}
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bool operator()(IteratorWrapper* a, IteratorWrapper* b) const {
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return comparator_->Compare(a->key(), b->key()) > 0;
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}
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private:
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const InternalKeyComparator* comparator_;
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};
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} // namespace ROCKSDB_NAMESPACE
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