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optimize construction of disk io storage objects

This commit is contained in:
arvidn 2017-03-23 08:18:04 -04:00 committed by Arvid Norberg
parent fcbcc250bb
commit 206a80acfb
2 changed files with 22 additions and 10 deletions
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3
include/libtorrent/disk_io_thread.hpp
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@ -579,6 +579,9 @@ namespace libtorrent
aux::vector<std::shared_ptr<storage_interface>, storage_index_t> m_torrents;
// indices into m_torrents to empty slots
std::vector<storage_index_t> m_free_slots;
#if TORRENT_USE_ASSERTS
int m_magic = 0x1337;
std::atomic<bool> m_jobs_aborted{false};

29
src/disk_io_thread.cpp
View File

@ -209,21 +209,30 @@ namespace libtorrent
storage_holder disk_io_thread::new_torrent(std::unique_ptr<storage_interface> storage)
{
TORRENT_ASSERT(storage);
auto it = std::find(m_torrents.begin(), m_torrents.end()
, std::shared_ptr<storage_interface>());
storage_index_t const idx((it == m_torrents.end())
? m_torrents.end_index()
: storage_index_t(std::uint32_t(it - m_torrents.begin())));
storage->set_storage_index(idx);
if (it == m_torrents.end()) m_torrents.emplace_back(std::move(storage));
else m_torrents[idx] = std::move(storage);
return storage_holder(idx, *this);
if (m_free_slots.empty())
{
storage_index_t const idx = m_torrents.end_index();
m_torrents.emplace_back(std::move(storage));
m_torrents.back()->set_storage_index(idx);
return storage_holder(idx, *this);
}
else
{
storage_index_t const idx = m_free_slots.back();
m_free_slots.pop_back();
(m_torrents[idx] = std::move(storage))->set_storage_index(idx);
return storage_holder(idx, *this);
}
}
void disk_io_thread::remove_torrent(storage_index_t const idx)
{
auto& pos = m_torrents[idx];
if (pos->dec_refcount() == 0) pos.reset();
if (pos->dec_refcount() == 0)
{
pos.reset();
m_free_slots.push_back(idx);
}
}
disk_io_thread::~disk_io_thread()