mirror of https://github.com/facebook/rocksdb.git
53 lines
1.7 KiB
C++
53 lines
1.7 KiB
C++
// Copyright (c) 2011-present, Facebook, Inc. All rights reserved.
|
|
// This source code is licensed under the BSD-style license found in the
|
|
// LICENSE file in the root directory of this source tree. An additional grant
|
|
// of patent rights can be found in the PATENTS file in the same directory.
|
|
// This source code is also licensed under the GPLv2 license found in the
|
|
// COPYING file in the root directory of this source tree.
|
|
//
|
|
// 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.
|
|
//
|
|
// This is used by the MemTable to allocate write buffer memory. It connects
|
|
// to WriteBufferManager so we can track and enforce overall write buffer
|
|
// limits.
|
|
|
|
#pragma once
|
|
|
|
#include <atomic>
|
|
#include "rocksdb/write_buffer_manager.h"
|
|
#include "util/allocator.h"
|
|
|
|
namespace rocksdb {
|
|
|
|
class Logger;
|
|
|
|
class MemTableAllocator : public Allocator {
|
|
public:
|
|
explicit MemTableAllocator(Allocator* allocator,
|
|
WriteBufferManager* write_buffer_manager);
|
|
~MemTableAllocator();
|
|
|
|
// Allocator interface
|
|
char* Allocate(size_t bytes) override;
|
|
char* AllocateAligned(size_t bytes, size_t huge_page_size = 0,
|
|
Logger* logger = nullptr) override;
|
|
size_t BlockSize() const override;
|
|
|
|
// Call when we're finished allocating memory so we can free it from
|
|
// the write buffer's limit.
|
|
void DoneAllocating();
|
|
|
|
private:
|
|
Allocator* allocator_;
|
|
WriteBufferManager* write_buffer_manager_;
|
|
std::atomic<size_t> bytes_allocated_;
|
|
|
|
// No copying allowed
|
|
MemTableAllocator(const MemTableAllocator&);
|
|
void operator=(const MemTableAllocator&);
|
|
};
|
|
|
|
} // namespace rocksdb
|