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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/util/concurrent_task_limiter_impl.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 '')
-rw-r--r-- | src/rocksdb/util/concurrent_task_limiter_impl.h | 67 |
1 files changed, 67 insertions, 0 deletions
diff --git a/src/rocksdb/util/concurrent_task_limiter_impl.h b/src/rocksdb/util/concurrent_task_limiter_impl.h new file mode 100644 index 000000000..4952ae23a --- /dev/null +++ b/src/rocksdb/util/concurrent_task_limiter_impl.h @@ -0,0 +1,67 @@ +// 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. + +#pragma once +#include <atomic> +#include <memory> + +#include "rocksdb/concurrent_task_limiter.h" +#include "rocksdb/env.h" + +namespace ROCKSDB_NAMESPACE { + +class TaskLimiterToken; + +class ConcurrentTaskLimiterImpl : public ConcurrentTaskLimiter { + public: + explicit ConcurrentTaskLimiterImpl(const std::string& name, + int32_t max_outstanding_task); + // No copying allowed + ConcurrentTaskLimiterImpl(const ConcurrentTaskLimiterImpl&) = delete; + ConcurrentTaskLimiterImpl& operator=(const ConcurrentTaskLimiterImpl&) = + delete; + + virtual ~ConcurrentTaskLimiterImpl(); + + virtual const std::string& GetName() const override; + + virtual void SetMaxOutstandingTask(int32_t limit) override; + + virtual void ResetMaxOutstandingTask() override; + + virtual int32_t GetOutstandingTask() const override; + + // Request token for adding a new task. + // If force == true, it requests a token bypassing throttle. + // Returns nullptr if it got throttled. + virtual std::unique_ptr<TaskLimiterToken> GetToken(bool force); + + private: + friend class TaskLimiterToken; + + std::string name_; + std::atomic<int32_t> max_outstanding_tasks_; + std::atomic<int32_t> outstanding_tasks_; +}; + +class TaskLimiterToken { + public: + explicit TaskLimiterToken(ConcurrentTaskLimiterImpl* limiter) + : limiter_(limiter) {} + ~TaskLimiterToken(); + + private: + ConcurrentTaskLimiterImpl* limiter_; + + // no copying allowed + TaskLimiterToken(const TaskLimiterToken&) = delete; + void operator=(const TaskLimiterToken&) = delete; +}; + +} // namespace ROCKSDB_NAMESPACE |