thin-provisioning-tools/caching/mapping_array.cc
2013-09-12 14:21:25 +01:00

29 lines
696 B
C++

#include "caching/mapping_array.h"
#include "persistent-data/endian_utils.h"
using namespace caching::mapping_array_detail;
//----------------------------------------------------------------
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);
}
//----------------------------------------------------------------