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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-21 11:54:28 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-21 11:54:28 +0000 |
commit | e6918187568dbd01842d8d1d2c808ce16a894239 (patch) | |
tree | 64f88b554b444a49f656b6c656111a145cbbaa28 /src/rocksdb/memory/allocator.h | |
parent | Initial commit. (diff) | |
download | ceph-upstream/18.2.2.tar.xz ceph-upstream/18.2.2.zip |
Adding upstream version 18.2.2.upstream/18.2.2
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'src/rocksdb/memory/allocator.h')
-rw-r--r-- | src/rocksdb/memory/allocator.h | 58 |
1 files changed, 58 insertions, 0 deletions
diff --git a/src/rocksdb/memory/allocator.h b/src/rocksdb/memory/allocator.h new file mode 100644 index 000000000..0d7cd60a9 --- /dev/null +++ b/src/rocksdb/memory/allocator.h @@ -0,0 +1,58 @@ +// 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. +// +// Abstract interface for allocating memory in blocks. This memory is freed +// when the allocator object is destroyed. See the Arena class for more info. + +#pragma once +#include <cerrno> +#include <cstddef> + +#include "rocksdb/write_buffer_manager.h" + +namespace ROCKSDB_NAMESPACE { + +class Logger; + +class Allocator { + public: + virtual ~Allocator() {} + + virtual char* Allocate(size_t bytes) = 0; + virtual char* AllocateAligned(size_t bytes, size_t huge_page_size = 0, + Logger* logger = nullptr) = 0; + + virtual size_t BlockSize() const = 0; +}; + +class AllocTracker { + public: + explicit AllocTracker(WriteBufferManager* write_buffer_manager); + // No copying allowed + AllocTracker(const AllocTracker&) = delete; + void operator=(const AllocTracker&) = delete; + + ~AllocTracker(); + void Allocate(size_t bytes); + // Call when we're finished allocating memory so we can free it from + // the write buffer's limit. + void DoneAllocating(); + + void FreeMem(); + + bool is_freed() const { return write_buffer_manager_ == nullptr || freed_; } + + private: + WriteBufferManager* write_buffer_manager_; + std::atomic<size_t> bytes_allocated_; + bool done_allocating_; + bool freed_; +}; + +} // namespace ROCKSDB_NAMESPACE |