127 lines
3.5 KiB
C++
127 lines
3.5 KiB
C++
/*
|
|
|
|
Copyright (c) 2007-2011, Arvid Norberg
|
|
All rights reserved.
|
|
|
|
Redistribution and use in source and binary forms, with or without
|
|
modification, are permitted provided that the following conditions
|
|
are met:
|
|
|
|
* Redistributions of source code must retain the above copyright
|
|
notice, this list of conditions and the following disclaimer.
|
|
* Redistributions in binary form must reproduce the above copyright
|
|
notice, this list of conditions and the following disclaimer in
|
|
the documentation and/or other materials provided with the distribution.
|
|
* Neither the name of the author nor the names of its
|
|
contributors may be used to endorse or promote products derived
|
|
from this software without specific prior written permission.
|
|
|
|
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
|
|
AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
|
|
LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
|
|
CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
|
|
SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
|
|
INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
|
|
CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
|
|
ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
|
|
POSSIBILITY OF SUCH DAMAGE.
|
|
|
|
*/
|
|
|
|
#ifndef TORRENT_DISK_BUFFER_POOL
|
|
#define TORRENT_DISK_BUFFER_POOL
|
|
|
|
#include "libtorrent/config.hpp"
|
|
#include "libtorrent/thread.hpp"
|
|
#include "libtorrent/session_settings.hpp"
|
|
#include "libtorrent/allocator.hpp"
|
|
|
|
#ifndef TORRENT_DISABLE_POOL_ALLOCATOR
|
|
#include <boost/pool/pool.hpp>
|
|
#endif
|
|
|
|
#if defined TORRENT_DEBUG || TORRENT_RELEASE_ASSERTS
|
|
#include <map>
|
|
#endif
|
|
|
|
namespace libtorrent
|
|
{
|
|
struct TORRENT_EXPORT disk_buffer_pool : boost::noncopyable
|
|
{
|
|
disk_buffer_pool(int block_size);
|
|
#if defined TORRENT_DEBUG || TORRENT_RELEASE_ASSERTS
|
|
~disk_buffer_pool();
|
|
#endif
|
|
|
|
#if defined TORRENT_DEBUG || TORRENT_RELEASE_ASSERTS
|
|
bool is_disk_buffer(char* buffer
|
|
, mutex::scoped_lock& l) const;
|
|
bool is_disk_buffer(char* buffer) const;
|
|
#endif
|
|
|
|
char* allocate_buffer(char const* category);
|
|
void free_buffer(char* buf);
|
|
void free_multiple_buffers(char** bufvec, int numbufs);
|
|
|
|
int block_size() const { return m_block_size; }
|
|
|
|
#ifdef TORRENT_STATS
|
|
int disk_allocations() const
|
|
{ return m_allocations; }
|
|
#endif
|
|
|
|
#ifdef TORRENT_DISK_STATS
|
|
std::ofstream m_disk_access_log;
|
|
#endif
|
|
|
|
void release_memory();
|
|
|
|
int in_use() const { return m_in_use; }
|
|
|
|
protected:
|
|
|
|
void free_buffer_impl(char* buf, mutex::scoped_lock& l);
|
|
|
|
// number of bytes per block. The BitTorrent
|
|
// protocol defines the block size to 16 KiB.
|
|
const int m_block_size;
|
|
|
|
// number of disk buffers currently allocated
|
|
int m_in_use;
|
|
|
|
session_settings m_settings;
|
|
|
|
private:
|
|
|
|
mutable mutex m_pool_mutex;
|
|
|
|
#ifndef TORRENT_DISABLE_POOL_ALLOCATOR
|
|
// memory pool for read and write operations
|
|
// and disk cache
|
|
boost::pool<page_aligned_allocator> m_pool;
|
|
#endif
|
|
|
|
#if defined TORRENT_DISK_STATS || defined TORRENT_STATS
|
|
int m_allocations;
|
|
#endif
|
|
#ifdef TORRENT_DISK_STATS
|
|
public:
|
|
void rename_buffer(char* buf, char const* category);
|
|
protected:
|
|
std::map<std::string, int> m_categories;
|
|
std::map<char*, std::string> m_buf_to_category;
|
|
std::ofstream m_log;
|
|
private:
|
|
#endif
|
|
#if defined TORRENT_DEBUG || TORRENT_RELEASE_ASSERTS
|
|
int m_magic;
|
|
#endif
|
|
};
|
|
|
|
}
|
|
|
|
#endif // TORRENT_DISK_BUFFER_POOL
|
|
|