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reserve space for m_peers_to_disconnect up front, in order to make queing up a peer for disconnection noexcept

This commit is contained in:
arvidn 2017-12-27 12:47:38 +01:00 committed by Arvid Norberg
parent ab9fcdf029
commit 6ba64a1bb3
1 changed files with 22 additions and 3 deletions
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25
src/torrent.cpp
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@ -5413,6 +5413,8 @@ namespace libtorrent {
if (p->associated_torrent().lock().get() == this)
{
std::weak_ptr<torrent> weak_t = shared_from_this();
TORRENT_ASSERT_VAL(m_peers_to_disconnect.capacity() > m_peers_to_disconnect.size()
, m_peers_to_disconnect.capacity());
m_peers_to_disconnect.push_back(p);
m_deferred_disconnect.post(m_ses.get_io_service(), aux::make_handler([=]()
{
@ -5492,9 +5494,10 @@ namespace libtorrent {
TORRENT_ASSERT(is_single_thread());
INVARIANT_CHECK;
std::vector<std::shared_ptr<peer_connection>> peers;
m_peers_to_disconnect.swap(peers);
for (auto const& p : peers)
#if TORRENT_USE_ASSERTS
auto const num = m_peers_to_disconnect.size();
#endif
for (auto const& p : m_peers_to_disconnect)
{
TORRENT_ASSERT(p);
TORRENT_ASSERT(p->associated_torrent().lock().get() == this);
@ -5502,6 +5505,8 @@ namespace libtorrent {
remove_connection(p.get());
m_ses.close_connection(p.get());
}
TORRENT_ASSERT_VAL(m_peers_to_disconnect.size() == num, m_peers_to_disconnect.size() - num);
m_peers_to_disconnect.clear();
if (m_graceful_pause_mode && m_connections.empty())
{
@ -5992,6 +5997,12 @@ namespace libtorrent {
TORRENT_ASSERT(!c->m_in_constructor);
// add the newly connected peer to this torrent's peer list
TORRENT_ASSERT(m_iterating_connections == 0);
// we don't want to have to allocate memory to disconnect this peer, so
// make sure there's enough memory allocated in the deferred_disconnect
// list up-front
m_peers_to_disconnect.reserve(m_connections.size() + 1);
sorted_insert(m_connections, c.get());
update_want_peers();
update_want_tick();
@ -6586,6 +6597,12 @@ namespace libtorrent {
// add the newly connected peer to this torrent's peer list
TORRENT_ASSERT(m_iterating_connections == 0);
// we don't want to have to allocate memory to disconnect this peer, so
// make sure there's enough memory allocated in the deferred_disconnect
// list up-front
m_peers_to_disconnect.reserve(m_connections.size() + 1);
sorted_insert(m_connections, c.get());
m_ses.insert_peer(c);
need_peer_list();
@ -6872,6 +6889,8 @@ namespace libtorrent {
}
peers_erased(st.erased);
m_peers_to_disconnect.reserve(m_connections.size() + 1);
TORRENT_ASSERT(sorted_find(m_connections, p) == m_connections.end());
TORRENT_ASSERT(m_iterating_connections == 0);
sorted_insert(m_connections, p);