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fully support unbuffered I/O

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This commit is contained in:
Arvid Norberg
2011-02-22 02:53:26 +00:00
parent f22cf00aa4
commit 97a40a45cd
8 changed files with 99 additions and 124 deletions
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71
src/disk_io_thread.cpp
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@@ -225,80 +225,11 @@ namespace libtorrent
#ifdef TORRENT_DISABLE_POOL_ALLOCATOR
page_aligned_allocator::free(buf);
#else
m_pool.ordered_free(buf);
m_pool.free(buf);
#endif
--m_in_use;
}
char* disk_buffer_pool::allocate_buffers(int num_blocks, 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 * num_blocks);
#else
char* ret = (char*)m_pool.ordered_malloc(num_blocks);
m_pool.set_next_size(m_settings.cache_buffer_chunk_size);
#endif
m_in_use += num_blocks;
#if TORRENT_USE_MLOCK
if (m_settings.lock_disk_cache)
{
#ifdef TORRENT_WINDOWS
VirtualLock(ret, m_block_size * num_blocks);
#else
mlock(ret, m_block_size * num_blocks);
#endif
}
#endif
#if defined TORRENT_DISK_STATS || defined TORRENT_STATS
m_allocations += num_blocks;
#endif
#ifdef TORRENT_DISK_STATS
m_categories[category] += num_blocks;
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;
}
void disk_buffer_pool::free_buffers(char* buf, int num_blocks)
{
TORRENT_ASSERT(buf);
TORRENT_ASSERT(num_blocks >= 1);
mutex::scoped_lock l(m_pool_mutex);
TORRENT_ASSERT(m_magic == 0x1337);
TORRENT_ASSERT(is_disk_buffer(buf, l));
#if defined TORRENT_DISK_STATS || defined TORRENT_STATS
m_allocations -= num_blocks;
#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] -= num_blocks;
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 * num_blocks);
#else
munlock(buf, m_block_size * num_blocks);
#endif
}
#endif
#ifdef TORRENT_DISABLE_POOL_ALLOCATOR
page_aligned_allocator::free(buf);
#else
m_pool.ordered_free(buf, num_blocks);
#endif
m_in_use -= num_blocks;
}
void disk_buffer_pool::release_memory()
{
TORRENT_ASSERT(m_magic == 0x1337);