Hi,
If I invoke boost::posix_time::time_from_string() from multiple threads I
get a core dump:
#0 0x00000000006ded78 in std::_Rb_tree, std::_Select1st >, std::lessstd::string,
std::allocator >
::_M_insert_unique(std::pair const&)
[clone .constprop.93] ()
(gdb) where
#0 0x00000000006ded78 in std::_Rb_tree, std::_Select1st >, std::lessstd::string,
std::allocator >
::_M_insert_unique(std::pair const&)
[clone .constprop.93] ()
#1 0x00000000006df400 in boost::gregorian::greg_month::get_month_map_ptr()
()
#2 0x00007f0dfbc590cd in
boost::date_time::month_str_to_ushortboost::gregorian::greg_month (s=...)
at
/home/chenher/projects/cactus_strategies/cactus_includes/boost/date_time/date_parsing.hpp:67
#3 0x00007f0dfbc29115 in
boost::date_time::parse_dateboost::gregorian::date (s=..., order_spec=0)
at
/home/chenher/projects/cactus_strategies/cactus_includes/boost/date_time/date_parsing.hpp:143
#4 0x00007f0dfbc7b96f in parse_delimited_timeboost::posix_time::ptime
(s=..., sep=<optimized out>) at
/home/chenher/projects/cactus_strategies/cactus_includes/boost/date_time/time_parsing.hpp:175
#5 time_from_string (s=...) at
/home/chenher/boost/date_time/posix_time/time_parsers.hpp:31
Looking at *libs/date_time/src/gregorian/greg_month.cpp*:37, it is apparent
that the use of a static variable renders the *month_map *not thread-safe:
greg_month::month_map_ptr_type greg_month::get_month_map_ptr()
{
static month_map_ptr_type month_map_ptr(new
greg_month::month_map_type());
if(month_map_ptr->empty()) {
std::string s("");
for(unsigned short i = 1; i <= 12; ++i) {
greg_month m(static_cast(i));
s = m.as_long_string();
s = date_time::convert_to_lower(s);
month_map_ptr->insert(std::make_pair(s, i));
s = m.as_short_string();
s = date_time::convert_to_lower(s);
month_map_ptr->insert(std::make_pair(s, i));
}
}
return month_map_ptr;
}
Is there any way around this? Is there a general initialization routine I
can call to get all such use of static initialized by a single thread?
Thanks.
Hering Cheng
Hering Cheng