38 lines
1.3 KiB
C
38 lines
1.3 KiB
C
|
// Copyright (c) 2011-present, Facebook, Inc. All rights reserved.
|
||
|
|
// This source code is licensed under the BSD-style license found in the
|
||
|
|
// LICENSE file in the root directory of this source tree. An additional grant
|
||
|
|
// of patent rights can be found in the PATENTS file in the same 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
|
||
|
|
|
||
|
|
namespace rocksdb {
|
||
|
|
|
||
|
|
/*
|
||
|
|
* ThreadPool is a component that will spawn N background threads that will
|
||
|
|
* be used to execute scheduled work, The number of background threads could
|
||
|
|
* be modified by calling SetBackgroundThreads().
|
||
|
|
* */
|
||
|
|
class ThreadPool {
|
||
|
|
public:
|
||
|
|
virtual ~ThreadPool() {}
|
||
|
|
|
||
|
|
// Wait for all threads to finish.
|
||
|
|
virtual void JoinAllThreads() = 0;
|
||
|
|
|
||
|
|
// Set the number of background threads that will be executing the
|
||
|
|
// scheduled jobs.
|
||
|
|
virtual void SetBackgroundThreads(int num) = 0;
|
||
|
|
|
||
|
|
// Get the number of jobs scheduled in the ThreadPool queue.
|
||
|
|
virtual unsigned int GetQueueLen() const = 0;
|
||
|
|
};
|
||
|
|
|
||
|
|
// NewThreadPool() is a function that could be used to create a ThreadPool
|
||
|
|
// with `num_threads` background threads.
|
||
|
|
extern ThreadPool* NewThreadPool(int num_threads);
|
||
|
|
|
||
|
|
} // namespace rocksdb
|