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improvements to the piece picker with regard to recently introduced categories

This commit is contained in:
Arvid Norberg 2007-04-27 02:33:59 +00:00
parent 88277fd736
commit 4afe9712e0
1 changed files with 13 additions and 4 deletions
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17
src/piece_picker.cpp
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@ -1103,6 +1103,12 @@ namespace libtorrent
= std::find_if(m_downloads.begin(), m_downloads.end(), has_index(*i));
assert(p != m_downloads.end());
// is true if all the other pieces that are currently
// requested from this piece are from the same
// peer as 'peer'.
bool only_same_peer = exclusively_requested_from(*p
, num_blocks_in_piece, peer);
// this means that this partial piece has
// been downloaded/requested partially from
// another peer that isn't us. And since
@ -1110,8 +1116,7 @@ namespace libtorrent
// blocks to the backup list. If the prioritized
// blocks aren't enough, blocks from this list
// will be picked.
if (prefer_whole_pieces
&& !exclusively_requested_from(*p, num_blocks_in_piece, peer))
if (prefer_whole_pieces && !only_same_peer)
{
if (int(backup_blocks.size()) >= num_blocks) continue;
for (int j = 0; j < num_blocks_in_piece; ++j)
@ -1132,8 +1137,12 @@ namespace libtorrent
if (p->requested_blocks[j] == 1
&& p->info[j].peer == peer) continue;
// if the piece is fast and the peer is slow, or vice versa,
// add the block as a backup
if (p->state != none && p->state != speed)
// add the block as a backup.
// override this behavior if all the other blocks
// have been requested from the same peer or
// if the state of the piece is none (the
// piece will in that case change state).
if (p->state != none && p->state != speed && !only_same_peer)
{
if (int(backup_blocks.size()) >= num_blocks) continue;
backup_blocks.push_back(piece_block(*i, j));