thin-provisioning-tools/caching/mapping_array.cc
2013-10-08 09:11:04 +01:00

76 lines
1.5 KiB
C++

#include "caching/mapping_array.h"
#include "persistent-data/endian_utils.h"
using namespace caching;
using namespace caching::mapping_array_damage;
//----------------------------------------------------------------
namespace {
const uint64_t FLAGS_MASK = (1 << 16) - 1;
}
void
mapping_traits::unpack(disk_type const &disk, value_type &value)
{
uint64_t v = base::to_cpu<uint64_t>(disk);
value.oblock_ = v >> 16;
value.flags_ = v & FLAGS_MASK;
}
void
mapping_traits::pack(value_type const &value, disk_type &disk)
{
uint64_t packed = value.oblock_ << 16;
packed = packed | (value.flags_ & FLAGS_MASK);
disk = base::to_disk<le64>(packed);
}
//----------------------------------------------------------------
missing_mappings::missing_mappings(run<uint32_t> const &keys,
std::string const &desc)
: keys_(keys),
desc_(desc)
{
}
void
missing_mappings::visit(damage_visitor &v) const
{
v.visit(*this);
}
namespace {
struct no_op_visitor {
virtual void visit(uint32_t index,
mapping_traits::value_type const &v) {
}
};
class ll_damage_visitor {
public:
ll_damage_visitor(damage_visitor &v)
: v_(v) {
}
virtual void visit(array_detail::damage const &d) {
v_.visit(missing_mappings(d.lost_keys_, d.desc_));
}
private:
damage_visitor &v_;
};
}
void
caching::check_mapping_array(mapping_array const &array, damage_visitor &visitor)
{
no_op_visitor vv;
ll_damage_visitor ll(visitor);
array.visit_values(vv, ll);
}
//----------------------------------------------------------------