You've already forked mariadb-columnstore-engine
mirror of
https://github.com/mariadb-corporation/mariadb-columnstore-engine.git
synced 2025-10-30 07:25:34 +03:00
107 lines
2.6 KiB
C++
107 lines
2.6 KiB
C++
/* Copyright (C) 2014 InfiniDB, Inc.
|
|
|
|
This program is free software; you can redistribute it and/or
|
|
modify it under the terms of the GNU General Public License
|
|
as published by the Free Software Foundation; version 2 of
|
|
the License.
|
|
|
|
This program is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
GNU General Public License for more details.
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
along with this program; if not, write to the Free Software
|
|
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
|
|
MA 02110-1301, USA. */
|
|
|
|
#pragma once
|
|
|
|
/***************************************************************************
|
|
*
|
|
* $Id: fileblockrequestqueue.h 2035 2013-01-21 14:12:19Z rdempsey $
|
|
*
|
|
* jrodriguez@calpont.com *
|
|
* *
|
|
***************************************************************************/
|
|
|
|
#include <deque>
|
|
#include <boost/thread.hpp>
|
|
#include <boost/thread/condition.hpp>
|
|
#include <iostream>
|
|
#include "filerequest.h"
|
|
|
|
/**
|
|
@author Jason Rodriguez <jrodriguez@calpont.com>
|
|
*/
|
|
|
|
/**
|
|
* @brief definition of the block request queue as stl std::priority_queue
|
|
**/
|
|
namespace dbbc
|
|
{
|
|
typedef std::deque<fileRequest*> fileBlockRequestQueue_t;
|
|
|
|
/**
|
|
* @brief class to hold requests for disk blocks in a queue. sorted by the size of a request
|
|
**/
|
|
|
|
class fileBlockRequestQueue
|
|
{
|
|
public:
|
|
/**
|
|
* @brief default ctor
|
|
**/
|
|
fileBlockRequestQueue();
|
|
|
|
/**
|
|
* @brief dtor
|
|
**/
|
|
virtual ~fileBlockRequestQueue();
|
|
|
|
/**
|
|
* @brief add a request to the queue
|
|
**/
|
|
int push(fileRequest& blk);
|
|
|
|
/**
|
|
* @brief get the next request from the queue and delete it from the queue
|
|
**/
|
|
fileRequest* pop(void);
|
|
|
|
/**
|
|
* @brief true if no reuquests are in the queue. false if there are requests in the queue
|
|
**/
|
|
bool empty() const;
|
|
|
|
/**
|
|
* @brief number of requests in the queue
|
|
**/
|
|
uint32_t size() const
|
|
{
|
|
return queueSize;
|
|
}
|
|
|
|
/**
|
|
* @brief queue will stop accecpting requests in preparation for the dtor
|
|
**/
|
|
void stop();
|
|
|
|
protected:
|
|
boost::mutex mutex;
|
|
boost::condition notEmpty;
|
|
fileBlockRequestQueue_t fbQueue;
|
|
uint32_t queueSize;
|
|
uint32_t readersWaiting;
|
|
|
|
private:
|
|
fileBlockRequestQueue(const fileBlockRequestQueue&) = delete;
|
|
const fileBlockRequestQueue& operator=(const fileBlockRequestQueue&) = delete;
|
|
|
|
/**
|
|
* @brief pointer to the next request to be popped from the queue
|
|
**/
|
|
fileRequest* top() const;
|
|
};
|
|
} // namespace dbbc
|