mask_type decode_mapping(hwloc_topology const& t,
mapping_type& m, std::vector<mask_type>& affinities,
std::size_t thread_index, error_code& ec)
{
std::size_t size = affinities.size();
mask_type mask;
switch (m[0].type_) {
case spec_type::socket:
// requested top level is a socket
mask = decode_mapping_socket(t, m, size, thread_index, ec);
break;
case spec_type::numanode:
// requested top level is a NUMA node
mask = decode_mapping_numanode(t, m, size, thread_index, ec);
break;
case spec_type::unknown:
// no top level is requested
mask = decode_mapping0_unknown(t, m, size,
t.get_machine_affinity_mask(), 0, thread_index, ec);
break;
default:
HPX_THROWS_IF(ec, bad_parameter, "decode_mapping",
boost::str(boost::format("unexpected specification type at "
"index zero: %x (%s)") %
static_cast<unsigned>(m[0].type_) %
spec_type::type_name(m[0].type_)));
return mask_type();
}
return mask;
}
mask_type decode_mapping_numanode(hwloc_topology const& t,
mapping_type& m, std::size_t size, std::size_t thread_index,
error_code& ec)
{
bounds_type b = extract_bounds(m[0], size, ec);
if (ec) return 0;
std::size_t index = std::size_t(-1);
if (m[1].type_ == spec_type::unknown &&
m[2].type_ == spec_type::unknown &&
b.size() > 1)
{
index = thread_index;
}
mask_type mask = 0;
std::size_t node_index = 0;
for (bounds_type::const_iterator it = b.begin(); it != b.end(); ++it, ++node_index)
{
if (index == std::size_t(-1) || node_index == index)
mask |= t.init_numa_node_affinity_mask_from_numa_node(*it);
}
std::size_t node_base_index = *b.begin();
if (thread_index != std::size_t(-1) && b.size() > 1)
node_base_index += thread_index;
std::size_t base_index = 0;
for (std::size_t i = 0; i != node_base_index; ++i)
base_index += t.get_number_of_numa_node_cores(i);
return decode_mapping0_unknown(t, m, size, mask, base_index,
thread_index, ec);
}
