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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/db/trim_history_scheduler.h | |
parent | Initial commit. (diff) | |
download | ceph-b26c4052f3542036551aa9dec9caa4226e456195.tar.xz ceph-b26c4052f3542036551aa9dec9caa4226e456195.zip |
Adding upstream version 18.2.2.upstream/18.2.2
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to '')
-rw-r--r-- | src/rocksdb/db/trim_history_scheduler.h | 46 |
1 files changed, 46 insertions, 0 deletions
diff --git a/src/rocksdb/db/trim_history_scheduler.h b/src/rocksdb/db/trim_history_scheduler.h new file mode 100644 index 000000000..252802a7a --- /dev/null +++ b/src/rocksdb/db/trim_history_scheduler.h @@ -0,0 +1,46 @@ +// 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). + +#pragma once + +#include <stdint.h> + +#include <atomic> +#include <mutex> + +#include "util/autovector.h" + +namespace ROCKSDB_NAMESPACE { + +class ColumnFamilyData; + +// Similar to FlushScheduler, TrimHistoryScheduler is a FIFO queue that keeps +// track of column families whose flushed immutable memtables may need to be +// removed (aka trimmed). The actual trimming may be slightly delayed. Due to +// the use of the mutex and atomic variable, ScheduleWork, +// TakeNextColumnFamily, and, Empty can be called concurrently. +class TrimHistoryScheduler { + public: + TrimHistoryScheduler() : is_empty_(true) {} + + // When a column family needs history trimming, add cfd to the FIFO queue + void ScheduleWork(ColumnFamilyData* cfd); + + // Remove the column family from the queue, the caller is responsible for + // calling `MemtableList::TrimHistory` + ColumnFamilyData* TakeNextColumnFamily(); + + bool Empty(); + + void Clear(); + + // Not on critical path, use mutex to ensure thread safety + private: + std::atomic<bool> is_empty_; + autovector<ColumnFamilyData*> cfds_; + std::mutex checking_mutex_; +}; + +} // namespace ROCKSDB_NAMESPACE |