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
52 lines
1.6 KiB
C++
52 lines
1.6 KiB
C++
/* Copyright (C) 2019 MariaDB Corporaton
|
|
|
|
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
|
|
|
|
/* This class defines a pool of bytestreams to improve BS reuse, reducing
|
|
the need to use the dynamic allocator. It allocates as many BS's as needed,
|
|
and automatically disposes of buffers that are 'large' to reduce mem usage.
|
|
Initially, 'large' is defined as 1MB.
|
|
*/
|
|
|
|
#include <deque>
|
|
#include <boost/thread/mutex.hpp>
|
|
#include "bytestream.h"
|
|
|
|
namespace messageqcpp
|
|
{
|
|
class ByteStreamPool
|
|
{
|
|
public:
|
|
ByteStreamPool();
|
|
ByteStreamPool(uint largeBufferSize); // BS's above largeBufferSize get deallocated on return to the pool
|
|
ByteStreamPool(uint largeBufferSize,
|
|
uint freeBufferLimit); // freeBufferLimit is the max # of BSs to reserve
|
|
virtual ~ByteStreamPool();
|
|
|
|
ByteStream* getByteStream();
|
|
void returnByteStream(ByteStream*);
|
|
|
|
private:
|
|
std::deque<ByteStream*> freeByteStreams;
|
|
boost::mutex mutex;
|
|
uint maxBufferSize;
|
|
uint maxFreeBuffers;
|
|
};
|
|
|
|
} // namespace messageqcpp
|