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
72 lines
2.1 KiB
C++
72 lines
2.1 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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// Copyright (c) 2011 The LevelDB Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file. See the AUTHORS file for names of contributors.
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#pragma once
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#include "rocksdb/rocksdb_namespace.h"
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namespace ROCKSDB_NAMESPACE {
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class Cleanable {
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public:
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Cleanable();
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// No copy constructor and copy assignment allowed.
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Cleanable(Cleanable&) = delete;
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Cleanable& operator=(Cleanable&) = delete;
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~Cleanable();
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// Move constructor and move assignment is allowed.
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Cleanable(Cleanable&&);
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Cleanable& operator=(Cleanable&&);
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// Clients are allowed to register function/arg1/arg2 triples that
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// will be invoked when this iterator is destroyed.
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//
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// Note that unlike all of the preceding methods, this method is
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// not abstract and therefore clients should not override it.
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typedef void (*CleanupFunction)(void* arg1, void* arg2);
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void RegisterCleanup(CleanupFunction function, void* arg1, void* arg2);
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void DelegateCleanupsTo(Cleanable* other);
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// DoCleanup and also resets the pointers for reuse
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inline void Reset() {
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DoCleanup();
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cleanup_.function = nullptr;
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cleanup_.next = nullptr;
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}
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protected:
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struct Cleanup {
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CleanupFunction function;
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void* arg1;
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void* arg2;
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Cleanup* next;
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};
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Cleanup cleanup_;
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// It also becomes the owner of c
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void RegisterCleanup(Cleanup* c);
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private:
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// Performs all the cleanups. It does not reset the pointers. Making it
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// private
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// to prevent misuse
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inline void DoCleanup() {
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if (cleanup_.function != nullptr) {
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(*cleanup_.function)(cleanup_.arg1, cleanup_.arg2);
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for (Cleanup* c = cleanup_.next; c != nullptr;) {
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(*c->function)(c->arg1, c->arg2);
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Cleanup* next = c->next;
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delete c;
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c = next;
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}
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}
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}
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};
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} // namespace ROCKSDB_NAMESPACE
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