fork of https://github.com/oxigraph/rocksdb and https://github.com/facebook/rocksdb for nextgraph and oxigraph
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
51 lines
1.8 KiB
51 lines
1.8 KiB
// 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 <stdint.h>
|
|
|
|
#include <string>
|
|
|
|
#include "rocksdb/rocksdb_namespace.h"
|
|
|
|
namespace ROCKSDB_NAMESPACE {
|
|
|
|
// This is NOT an extensible interface but a public interface for result of
|
|
// NewConcurrentTaskLimiter. Any derived classes must be RocksDB internal.
|
|
class ConcurrentTaskLimiter {
|
|
public:
|
|
virtual ~ConcurrentTaskLimiter() {}
|
|
|
|
// Returns a name that identifies this concurrent task limiter.
|
|
virtual const std::string& GetName() const = 0;
|
|
|
|
// Set max concurrent tasks.
|
|
// limit = 0 means no new task allowed.
|
|
// limit < 0 means no limitation.
|
|
virtual void SetMaxOutstandingTask(int32_t limit) = 0;
|
|
|
|
// Reset to unlimited max concurrent task.
|
|
virtual void ResetMaxOutstandingTask() = 0;
|
|
|
|
// Returns current outstanding task count.
|
|
virtual int32_t GetOutstandingTask() const = 0;
|
|
};
|
|
|
|
// Create a ConcurrentTaskLimiter that can be shared with multiple CFs
|
|
// across RocksDB instances to control concurrent tasks.
|
|
//
|
|
// @param name: Name of the limiter.
|
|
// @param limit: max concurrent tasks.
|
|
// limit = 0 means no new task allowed.
|
|
// limit < 0 means no limitation.
|
|
extern ConcurrentTaskLimiter* NewConcurrentTaskLimiter(const std::string& name,
|
|
int32_t limit);
|
|
|
|
} // namespace ROCKSDB_NAMESPACE
|
|
|