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clean up file pool a bit

This commit is contained in:
arvidn 2016-12-31 17:28:01 -05:00 committed by Arvid Norberg
parent 005d1a47b0
commit 1600d4dca5
2 changed files with 17 additions and 34 deletions
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7
include/libtorrent/file_pool.hpp
View File

@ -127,9 +127,8 @@ namespace libtorrent
struct lru_file_entry
{
lru_file_entry(): key(0), last_use(aux::time_now()), mode(0) {}
mutable file_handle file_ptr;
void* key;
lru_file_entry(): last_use(aux::time_now()), mode(0) {}
file_handle file_ptr;
time_point last_use;
int mode;
};
@ -137,7 +136,7 @@ namespace libtorrent
// maps storage pointer, file index pairs to the
// lru entry for the file
typedef std::map<std::pair<void*, int>, lru_file_entry> file_set;
file_set m_files;
#if TORRENT_USE_ASSERTS
std::vector<std::pair<std::string, void const*> > m_deleted_storages;

44
src/file_pool.cpp
View File

@ -154,16 +154,6 @@ namespace libtorrent
lru_file_entry& e = i->second;
e.last_use = aux::time_now();
if (e.key != st && ((e.mode & file::rw_mask) != file::read_only
|| (m & file::rw_mask) != file::read_only))
{
// this means that another instance of the storage
// is using the exact same file.
ec = errors::file_collision;
return file_handle();
}
e.key = st;
// if we asked for a file in write mode,
// and the cached file is is not opened in
// write mode, re-open it
@ -212,13 +202,10 @@ namespace libtorrent
set_low_priority(e.file_ptr);
#endif
e.mode = m;
e.key = st;
m_files.insert(std::make_pair(std::make_pair(st, file_index), e));
TORRENT_ASSERT(e.file_ptr->is_open());
file_handle file_ptr = e.file_ptr;
m_files.insert(std::make_pair(std::make_pair(st, file_index), e));
TORRENT_ASSERT(file_ptr->is_open());
// the file is not in our cache
if (int(m_files.size()) >= m_size)
{
// the file cache is at its maximum size, close
@ -267,11 +254,12 @@ namespace libtorrent
file_set::iterator i = m_files.find(std::make_pair(st, file_index));
if (i == m_files.end()) return;
file_handle file_ptr = i->second.file_ptr;
m_files.erase(i);
// closing a file may be long running operation (mac os x)
// closing a file may take a long time (mac os x), so make sure
// we're not holding the mutex
l.unlock();
file_ptr.reset();
}
@ -284,26 +272,22 @@ namespace libtorrent
if (st == 0)
{
file_set tmp;
tmp.swap(m_files);
m_files.clear();
l.unlock();
return;
}
file_set::iterator begin = m_files.lower_bound(std::make_pair(st, 0));
file_set::iterator end = m_files.upper_bound(std::make_pair(st, std::numeric_limits<int>::max()));
std::vector<file_handle> to_close;
for (file_set::iterator i = m_files.begin();
i != m_files.end();)
while (begin != end)
{
if (i->second.key == st)
{
to_close.push_back(i->second.file_ptr);
m_files.erase(i++);
}
else
++i;
to_close.push_back(begin->second.file_ptr);
m_files.erase(begin++);
}
l.unlock();
// the files are closed here
// the files are closed here while the lock is not held
}
#if TORRENT_USE_ASSERTS
@ -323,7 +307,7 @@ namespace libtorrent
for (file_set::const_iterator i = m_files.begin();
i != m_files.end(); ++i)
{
if (i->second.key == st && !i->second.file_ptr.unique())
if (i->first.first == st && !i->second.file_ptr.unique())
return false;
}
return true;