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a14b7873ee
Summary: Introduces a new class for managing write buffer memory across column families. We supplement ColumnFamilyOptions::write_buffer_size with ColumnFamilyOptions::write_buffer, a shared pointer to a WriteBuffer instance that enforces memory limits before flushing out to disk. Test Plan: Added SharedWriteBuffer unit test to db_test.cc Reviewers: sdong, rven, ljin, igor Reviewed By: igor Subscribers: tnovak, yhchiang, dhruba, xjin, MarkCallaghan, yoshinorim Differential Revision: https://reviews.facebook.net/D22581
33 lines
1 KiB
C++
33 lines
1 KiB
C++
// Copyright (c) 2014, Facebook, Inc. All rights reserved.
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// This source code is licensed under the BSD-style license found in the
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// LICENSE file in the root directory of this source tree. An additional grant
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// of patent rights can be found in the PATENTS file in the same directory.
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//
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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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//
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// Abstract interface for allocating memory in blocks. This memory is freed
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// when the allocator object is destroyed. See the Arena class for more info.
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#pragma once
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#include <cstddef>
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#include <cerrno>
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namespace rocksdb {
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class Logger;
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class Allocator {
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public:
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virtual ~Allocator() {}
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virtual char* Allocate(size_t bytes) = 0;
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virtual char* AllocateAligned(size_t bytes, size_t huge_page_size = 0,
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Logger* logger = nullptr) = 0;
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virtual size_t BlockSize() const = 0;
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};
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} // namespace rocksdb
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