add missing files

This commit is contained in:
Arvid Norberg 2011-08-01 08:03:26 +00:00
parent 855e5a1acb
commit 6a01b035be
2 changed files with 338 additions and 0 deletions

View File

@ -0,0 +1,126 @@
/*
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

212
src/disk_buffer_pool.cpp Normal file
View File

@ -0,0 +1,212 @@
/*
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.
*/
#include "libtorrent/disk_buffer_pool.hpp"
#include "libtorrent/assert.hpp"
#if TORRENT_USE_MLOCK && !defined TORRENT_WINDOWS
#include <sys/mman.h>
#endif
namespace libtorrent
{
disk_buffer_pool::disk_buffer_pool(int block_size)
: m_block_size(block_size)
, m_in_use(0)
#ifndef TORRENT_DISABLE_POOL_ALLOCATOR
, m_pool(block_size, m_settings.cache_buffer_chunk_size)
#endif
{
#if defined TORRENT_DISK_STATS || defined TORRENT_STATS
m_allocations = 0;
#endif
#ifdef TORRENT_DISK_STATS
m_log.open("disk_buffers.log", std::ios::trunc);
m_categories["read cache"] = 0;
m_categories["write cache"] = 0;
m_disk_access_log.open("disk_access.log", std::ios::trunc);
#endif
#if defined TORRENT_DEBUG || TORRENT_RELEASE_ASSERTS
m_magic = 0x1337;
#endif
}
#if defined TORRENT_DEBUG || TORRENT_RELEASE_ASSERTS
disk_buffer_pool::~disk_buffer_pool()
{
TORRENT_ASSERT(m_magic == 0x1337);
m_magic = 0;
}
#endif
#if defined TORRENT_DEBUG || TORRENT_RELEASE_ASSERTS || defined TORRENT_DISK_STATS
bool disk_buffer_pool::is_disk_buffer(char* buffer
, mutex::scoped_lock& l) const
{
TORRENT_ASSERT(m_magic == 0x1337);
#ifdef TORRENT_DISK_STATS
if (m_buf_to_category.find(buffer)
== m_buf_to_category.end()) return false;
#endif
#ifdef TORRENT_DISABLE_POOL_ALLOCATOR
return true;
#else
return m_pool.is_from(buffer);
#endif
}
bool disk_buffer_pool::is_disk_buffer(char* buffer) const
{
mutex::scoped_lock l(m_pool_mutex);
return is_disk_buffer(buffer, l);
}
#endif
char* disk_buffer_pool::allocate_buffer(char const* category)
{
mutex::scoped_lock l(m_pool_mutex);
TORRENT_ASSERT(m_magic == 0x1337);
#ifdef TORRENT_DISABLE_POOL_ALLOCATOR
char* ret = page_aligned_allocator::malloc(m_block_size);
#else
char* ret = (char*)m_pool.ordered_malloc();
m_pool.set_next_size(m_settings.cache_buffer_chunk_size);
#endif
++m_in_use;
#if TORRENT_USE_MLOCK
if (m_settings.lock_disk_cache)
{
#ifdef TORRENT_WINDOWS
VirtualLock(ret, m_block_size);
#else
mlock(ret, m_block_size);
#endif
}
#endif
#if defined TORRENT_DISK_STATS || defined TORRENT_STATS
++m_allocations;
#endif
#ifdef TORRENT_DISK_STATS
++m_categories[category];
m_buf_to_category[ret] = category;
m_log << log_time() << " " << category << ": " << m_categories[category] << "\n";
#endif
TORRENT_ASSERT(ret == 0 || is_disk_buffer(ret, l));
return ret;
}
#ifdef TORRENT_DISK_STATS
void disk_buffer_pool::rename_buffer(char* buf, char const* category)
{
mutex::scoped_lock l(m_pool_mutex);
TORRENT_ASSERT(is_disk_buffer(buf, l));
TORRENT_ASSERT(m_categories.find(m_buf_to_category[buf])
!= m_categories.end());
std::string const& prev_category = m_buf_to_category[buf];
--m_categories[prev_category];
m_log << log_time() << " " << prev_category << ": " << m_categories[prev_category] << "\n";
++m_categories[category];
m_buf_to_category[buf] = category;
m_log << log_time() << " " << category << ": " << m_categories[category] << "\n";
TORRENT_ASSERT(m_categories.find(m_buf_to_category[buf])
!= m_categories.end());
}
#endif
void disk_buffer_pool::free_multiple_buffers(char** bufvec, int numbufs)
{
char** end = bufvec + numbufs;
// sort the pointers in order to maximize cache hits
std::sort(bufvec, end);
mutex::scoped_lock l(m_pool_mutex);
for (; bufvec != end; ++bufvec)
{
char* buf = *bufvec;
TORRENT_ASSERT(buf);
free_buffer_impl(buf, l);;
}
}
void disk_buffer_pool::free_buffer(char* buf)
{
mutex::scoped_lock l(m_pool_mutex);
free_buffer_impl(buf, l);
}
void disk_buffer_pool::free_buffer_impl(char* buf, mutex::scoped_lock& l)
{
TORRENT_ASSERT(buf);
TORRENT_ASSERT(m_magic == 0x1337);
TORRENT_ASSERT(is_disk_buffer(buf, l));
#if defined TORRENT_DISK_STATS || defined TORRENT_STATS
--m_allocations;
#endif
#ifdef TORRENT_DISK_STATS
TORRENT_ASSERT(m_categories.find(m_buf_to_category[buf])
!= m_categories.end());
std::string const& category = m_buf_to_category[buf];
--m_categories[category];
m_log << log_time() << " " << category << ": " << m_categories[category] << "\n";
m_buf_to_category.erase(buf);
#endif
#if TORRENT_USE_MLOCK
if (m_settings.lock_disk_cache)
{
#ifdef TORRENT_WINDOWS
VirtualUnlock(buf, m_block_size);
#else
munlock(buf, m_block_size);
#endif
}
#endif
#ifdef TORRENT_DISABLE_POOL_ALLOCATOR
page_aligned_allocator::free(buf);
#else
m_pool.free(buf);
#endif
--m_in_use;
}
void disk_buffer_pool::release_memory()
{
TORRENT_ASSERT(m_magic == 0x1337);
#ifndef TORRENT_DISABLE_POOL_ALLOCATOR
mutex::scoped_lock l(m_pool_mutex);
m_pool.release_memory();
#endif
}
}