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premiere-libtorrent
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fixes to the new disk cache and the volatile cache feature

This commit is contained in:
Arvid Norberg 2010-01-31 16:29:52 +00:00
parent ccf8b0278a
commit 53144f6f14
1 changed files with 9 additions and 35 deletions
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44
src/disk_io_thread.cpp
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@ -392,33 +392,6 @@ namespace libtorrent
add_job(j, l);
}
bool range_overlap(int start1, int length1, int start2, int length2)
{
return (start1 <= start2 && start1 + length1 > start2)
|| (start2 <= start1 && start2 + length2 > start1);
}
namespace
{
// The semantic of this operator is:
// should lhs come before rhs in the job queue
bool operator<(disk_io_job const& lhs, disk_io_job const& rhs)
{
// NOTE: comparison inverted to make higher priority
// skip _in_front_of_ lower priority
if (lhs.priority > rhs.priority) return true;
if (lhs.priority < rhs.priority) return false;
if (lhs.storage.get() < rhs.storage.get()) return true;
if (lhs.storage.get() > rhs.storage.get()) return false;
if (lhs.piece < rhs.piece) return true;
if (lhs.piece > rhs.piece) return false;
if (lhs.offset < rhs.offset) return true;
// if (lhs.offset > rhs.offset) return false;
return false;
}
}
struct update_last_use
{
void operator()(disk_io_thread::cached_piece_entry& p)
@ -463,7 +436,10 @@ namespace libtorrent
cache_lru_index_t& ridx = m_read_pieces.get<1>();
i = ridx.begin();
while (i != ridx.end() && now - i->last_use > cut_off)
{
free_piece(const_cast<cached_piece_entry&>(*i), l);
ridx.erase(i++);
}
}
// returns the number of blocks that were freed
@ -711,12 +687,6 @@ namespace libtorrent
{
std::memcpy(buf.get() + offset, p.blocks[i].buf, block_size);
offset += m_block_size;
if (m_settings.volatile_read_cache)
{
free_buffer(p.blocks[i].buf);
p.blocks[i].buf = 0;
--p.num_blocks;
}
}
buffer_size += block_size;
TORRENT_ASSERT(p.num_blocks > 0);
@ -1126,7 +1096,8 @@ namespace libtorrent
TORRENT_ASSERT(ret > 0);
if (ret < 0) return ret;
cache_piece_index_t& idx = m_read_pieces.get<0>();
idx.modify(p, update_last_use());
if (p->num_blocks == 0) idx.erase(p);
else idx.modify(p, update_last_use());
// if read cache is disabled or we exceeded the
// limit, remove this piece from the cache
@ -1243,6 +1214,8 @@ namespace libtorrent
free_buffer(p.blocks[block].buf);
p.blocks[block].buf = 0;
--p.num_blocks;
--m_cache_stats.cache_size;
--m_cache_stats.read_cache_size;
}
++block;
}
@ -1289,7 +1262,8 @@ namespace libtorrent
ret = copy_from_piece(const_cast<cached_piece_entry&>(*p), hit, j, l);
if (ret < 0) return ret;
idx.modify(p, update_last_use());
if (p->num_blocks == 0) idx.erase(p);
else idx.modify(p, update_last_use());
ret = j.buffer_size;
++m_cache_stats.blocks_read;