void load_struct_from_settings(aux::session_settings const& current, session_settings& ret)
{
for (int i = 0; i < settings_pack::num_string_settings; ++i)
{
if (str_settings[i].offset == 0) continue;
std::string& val = *(std::string*)(((char*)&ret) + str_settings[i].offset);
val = current.get_str(settings_pack::string_type_base + i);
}
for (int i = 0; i < settings_pack::num_int_settings; ++i)
{
if (int_settings[i].offset == 0) continue;
int& val = *(int*)(((char*)&ret) + int_settings[i].offset);
val = current.get_int(settings_pack::int_type_base + i);
}
for (int i = 0; i < settings_pack::num_bool_settings; ++i)
{
if (bool_settings[i].offset == 0) continue;
bool& val = *(bool*)(((char*)&ret) + bool_settings[i].offset);
val = current.get_bool(settings_pack::bool_type_base + i);
}
// special case for deprecated float values
ret.share_ratio_limit = float(current.get_int(settings_pack::share_ratio_limit)) / 100.f;
ret.seed_time_ratio_limit = float(current.get_int(settings_pack::seed_time_ratio_limit)) / 100.f;
ret.peer_turnover = float(current.get_int(settings_pack::peer_turnover)) / 100.f;
ret.peer_turnover_cutoff = float(current.get_int(settings_pack::peer_turnover_cutoff)) / 100.f;
}
boost::shared_ptr<settings_pack> load_pack_from_struct(
aux::session_settings const& current, session_settings const& s)
{
boost::shared_ptr<settings_pack> p = boost::make_shared<settings_pack>();
for (int i = 0; i < settings_pack::num_string_settings; ++i)
{
if (str_settings[i].offset == 0) continue;
std::string& val = *(std::string*)(((char*)&s) + str_settings[i].offset);
int setting_name = settings_pack::string_type_base + i;
if (val == current.get_str(setting_name)) continue;
p->set_str(setting_name, val);
}
for (int i = 0; i < settings_pack::num_int_settings; ++i)
{
if (int_settings[i].offset == 0) continue;
int& val = *(int*)(((char*)&s) + int_settings[i].offset);
int setting_name = settings_pack::int_type_base + i;
if (val == current.get_int(setting_name)) continue;
p->set_int(setting_name, val);
}
for (int i = 0; i < settings_pack::num_bool_settings; ++i)
{
if (bool_settings[i].offset == 0) continue;
bool& val = *(bool*)(((char*)&s) + bool_settings[i].offset);
int setting_name = settings_pack::bool_type_base + i;
if (val == current.get_bool(setting_name)) continue;
p->set_bool(setting_name, val);
}
// special case for deprecated float values
int val = current.get_int(settings_pack::share_ratio_limit);
if (fabs(s.share_ratio_limit - float(val) / 100.f) > 0.001f)
p->set_int(settings_pack::share_ratio_limit, s.share_ratio_limit * 100);
val = current.get_int(settings_pack::seed_time_ratio_limit);
if (fabs(s.seed_time_ratio_limit - float(val) / 100.f) > 0.001f)
p->set_int(settings_pack::seed_time_ratio_limit, s.seed_time_ratio_limit * 100);
val = current.get_int(settings_pack::peer_turnover);
if (fabs(s.peer_turnover - float(val) / 100.f) > 0.001)
p->set_int(settings_pack::peer_turnover, s.peer_turnover * 100);
val = current.get_int(settings_pack::peer_turnover_cutoff);
if (fabs(s.peer_turnover_cutoff - float(val) / 100.f) > 0.001)
p->set_int(settings_pack::peer_turnover_cutoff, s.peer_turnover_cutoff * 100);
return p;
}
void initialize_default_settings(aux::session_settings& s)
{
for (int i = 0; i < settings_pack::num_string_settings; ++i)
{
if (str_settings[i].default_value == nullptr) continue;
s.set_str(settings_pack::string_type_base + i, str_settings[i].default_value);
TORRENT_ASSERT(s.get_str(settings_pack::string_type_base + i) == str_settings[i].default_value);
}
for (int i = 0; i < settings_pack::num_int_settings; ++i)
{
s.set_int(settings_pack::int_type_base + i, int_settings[i].default_value);
TORRENT_ASSERT(s.get_int(settings_pack::int_type_base + i) == int_settings[i].default_value);
}
for (int i = 0; i < settings_pack::num_bool_settings; ++i)
{
s.set_bool(settings_pack::bool_type_base + i, bool_settings[i].default_value);
TORRENT_ASSERT(s.get_bool(settings_pack::bool_type_base + i) == bool_settings[i].default_value);
}
}
void apply_pack(settings_pack const* pack, aux::session_settings& sett
, aux::session_impl* ses)
{
typedef void (aux::session_impl::*fun_t)();
std::vector<fun_t> callbacks;
for (auto const& p : pack->m_strings)
{
// disregard setting indices that are not string types
if ((p.first & settings_pack::type_mask) != settings_pack::string_type_base)
continue;
// ignore settings that are out of bounds
int const index = p.first & settings_pack::index_mask;
TORRENT_ASSERT_PRECOND(index >= 0 && index < settings_pack::num_string_settings);
if (index < 0 || index >= settings_pack::num_string_settings)
continue;
// if the value did not change, don't call the update callback
if (sett.get_str(p.first) == p.second) continue;
sett.set_str(p.first, p.second);
str_setting_entry_t const& sa = str_settings[index];
if (sa.fun && ses
&& std::find(callbacks.begin(), callbacks.end(), sa.fun) == callbacks.end())
callbacks.push_back(sa.fun);
}
for (auto const& p : pack->m_ints)
{
// disregard setting indices that are not int types
if ((p.first & settings_pack::type_mask) != settings_pack::int_type_base)
continue;
// ignore settings that are out of bounds
int const index = p.first & settings_pack::index_mask;
TORRENT_ASSERT_PRECOND(index >= 0 && index < settings_pack::num_int_settings);
if (index < 0 || index >= settings_pack::num_int_settings)
continue;
// if the value did not change, don't call the update callback
if (sett.get_int(p.first) == p.second) continue;
sett.set_int(p.first, p.second);
int_setting_entry_t const& sa = int_settings[index];
if (sa.fun && ses
&& std::find(callbacks.begin(), callbacks.end(), sa.fun) == callbacks.end())
callbacks.push_back(sa.fun);
}
for (auto const& p : pack->m_bools)
{
// disregard setting indices that are not bool types
if ((p.first & settings_pack::type_mask) != settings_pack::bool_type_base)
continue;
// ignore settings that are out of bounds
int const index = p.first & settings_pack::index_mask;
TORRENT_ASSERT_PRECOND(index >= 0 && index < settings_pack::num_bool_settings);
if (index < 0 || index >= settings_pack::num_bool_settings)
continue;
// if the value did not change, don't call the update callback
if (sett.get_bool(p.first) == p.second) continue;
sett.set_bool(p.first, p.second);
bool_setting_entry_t const& sa = bool_settings[index];
if (sa.fun && ses
&& std::find(callbacks.begin(), callbacks.end(), sa.fun) == callbacks.end())
callbacks.push_back(sa.fun);
}
// call the callbacks once all the settings have been applied, and
// only once per callback
for (auto const& f : callbacks)
{
(ses->*f)();
}
}
void disk_buffer_pool::set_settings(aux::session_settings const& sett)
{
mutex::scoped_lock l(m_pool_mutex);
// 0 cache_buffer_chunk_size means 'automatic' (i.e.
// proportional to the total disk cache size)
m_cache_buffer_chunk_size = sett.get_int(settings_pack::cache_buffer_chunk_size);
m_lock_disk_cache = sett.get_bool(settings_pack::lock_disk_cache);
#ifndef TORRENT_DISABLE_POOL_ALLOCATOR
m_want_pool_allocator = sett.get_bool(settings_pack::use_disk_cache_pool);
// if there are no allocated blocks, it's OK to switch allocator
if (m_in_use == 0)
m_using_pool_allocator = m_want_pool_allocator;
#endif
#if TORRENT_HAVE_MMAP
// if we've already allocated an mmap, we can't change
// anything unless there are no allocations in use
if (m_cache_pool && m_in_use > 0) return;
#endif
// only allow changing size if we're not using mmapped
// cache, or if we're just about to turn it off
if (
#if TORRENT_HAVE_MMAP
m_cache_pool == 0 ||
#endif
sett.get_str(settings_pack::mmap_cache).empty())
{
int cache_size = sett.get_int(settings_pack::cache_size);
if (cache_size < 0)
{
boost::uint64_t phys_ram = physical_ram();
if (phys_ram == 0) m_max_use = 1024;
else m_max_use = phys_ram / 8 / m_block_size;
}
else
{
m_max_use = cache_size;
}
m_low_watermark = m_max_use - (std::max)(16, sett.get_int(settings_pack::max_queued_disk_bytes) / 0x4000);
if (m_low_watermark < 0) m_low_watermark = 0;
if (m_in_use >= m_max_use && !m_exceeded_max_size)
{
m_exceeded_max_size = true;
m_trigger_cache_trim();
}
}
#if TORRENT_USE_ASSERTS
m_settings_set = true;
#endif
#if TORRENT_HAVE_MMAP
// #error support resizing the map
if (m_cache_pool && sett.get_str(settings_pack::mmap_cache).empty())
{
TORRENT_ASSERT(m_in_use == 0);
munmap(m_cache_pool, boost::uint64_t(m_max_use) * 0x4000);
m_cache_pool = 0;
// attempt to make MacOS not flush this to disk, making close()
// block for a long time
ftruncate(m_cache_fd, 0);
close(m_cache_fd);
m_cache_fd = -1;
std::vector<int>().swap(m_free_list);
}
else if (m_cache_pool == 0 && !sett.get_str(settings_pack::mmap_cache).empty())
{
// O_TRUNC here is because we don't actually care about what's
// in the file now, there's no need to ever read that into RAM
#ifndef O_EXLOCK
#define O_EXLOCK 0
#endif
m_cache_fd = open(sett.get_str(settings_pack::mmap_cache).c_str(), O_RDWR | O_CREAT | O_EXLOCK | O_TRUNC, 0700);
if (m_cache_fd < 0)
{
if (m_post_alert)
{
error_code ec(errno, boost::system::generic_category());
m_ios.post(boost::bind(alert_callback, m_post_alert, new mmap_cache_alert(ec)));
}
}
else
{
#ifndef MAP_NOCACHE
#define MAP_NOCACHE 0
#endif
ftruncate(m_cache_fd, boost::uint64_t(m_max_use) * 0x4000);
m_cache_pool = (char*)mmap(0, boost::uint64_t(m_max_use) * 0x4000, PROT_READ | PROT_WRITE
, MAP_SHARED | MAP_NOCACHE, m_cache_fd, 0);
if (intptr_t(m_cache_pool) == -1)
{
if (m_post_alert)
{
error_code ec(errno, boost::system::generic_category());
m_ios.post(boost::bind(alert_callback, m_post_alert, new mmap_cache_alert(ec)));
}
m_cache_pool = 0;
// attempt to make MacOS not flush this to disk, making close()
// block for a long time
ftruncate(m_cache_fd, 0);
close(m_cache_fd);
m_cache_fd = -1;
}
else
{
TORRENT_ASSERT((size_t(m_cache_pool) & 0xfff) == 0);
m_free_list.reserve(m_max_use);
for (int i = 0; i < m_max_use; ++i)
m_free_list.push_back(i);
}
}
}
#endif
}