// Copy this into a new CubitSimpleAttrib
CubitSimpleAttrib FacetAttrib::get_CSA() const
{
// Set initial list size
std::vector<CubitString> string_list(numStrings);
std::vector<int> int_list(numIntegers);
std::vector<double> double_list(numDoubles);
// Don't need to 'new' objects in DLIList because
// CSA will make copies. Just put addresses in list.
int i;
for( i = 0; i < numStrings; i++ )
string_list[i] = stringArray[i];
for( i = 0; i < numIntegers; i++ )
int_list[i] = integerArray[i];
for( i = 0; i < numDoubles; i++ )
double_list[i] = doubleArray[i];
return CubitSimpleAttrib( &string_list, &double_list, &int_list );
}
void Row_mvcc::buffer_req(TsType type, txn_man * txn, bool served)
{
uint32_t access_num = 1;
while (true) {
for (uint32_t i = 0; i < _req_len; i++) {
// TODO No need to keep all read history.
// in some sense, only need to keep the served read request with the max ts.
//
if (!_requests[i].valid) {
_requests[i].valid = true;
_requests[i].type = type;
_requests[i].ts = txn->get_ts();
_requests[i].txn = txn;
_requests[i].time = get_sys_clock();
return;
}
}
assert(access_num == 1);
double_list(1);
access_num ++;
}
}
row_t *
Row_mvcc::reserveRow(ts_t ts, txn_man * txn)
{
assert(!_exists_prewrite);
// Garbage Collection
ts_t min_ts = glob_manager->get_min_ts(txn->get_thd_id());
if (_oldest_wts < min_ts &&
_num_versions == _his_len)
{
ts_t max_recycle_ts = 0;
ts_t idx = _his_len;
for (uint32_t i = 0; i < _his_len; i++) {
if (_write_history[i].valid
&& _write_history[i].ts < min_ts
&& _write_history[i].ts > max_recycle_ts)
{
max_recycle_ts = _write_history[i].ts;
idx = i;
}
}
// some entries can be garbage collected.
if (idx != _his_len) {
row_t * temp = _row;
_row = _write_history[idx].row;
_write_history[idx].row = temp;
_oldest_wts = max_recycle_ts;
for (uint32_t i = 0; i < _his_len; i++) {
if (_write_history[i].valid
&& _write_history[i].ts <= max_recycle_ts)
{
_write_history[i].valid = false;
_write_history[i].reserved = false;
assert(_write_history[i].row);
_num_versions --;
}
}
}
}
#if DEBUG_CC
uint32_t his_size = 0;
uint64_t max_ts = 0;
for (uint32_t i = 0; i < _his_len; i++)
if (_write_history[i].valid) {
his_size ++;
if (_write_history[i].ts > max_ts)
max_ts = _write_history[i].ts;
}
assert(his_size == _num_versions);
if (_num_versions > 0)
assert(max_ts == _latest_wts);
#endif
uint32_t idx = _his_len;
// _write_history is not full, find an unused entry for P_REQ.
if (_num_versions < _his_len) {
for (uint32_t i = 0; i < _his_len; i++) {
if (!_write_history[i].valid
&& !_write_history[i].reserved
&& _write_history[i].row != NULL)
{
idx = i;
break;
}
else if (!_write_history[i].valid
&& !_write_history[i].reserved)
idx = i;
}
assert(idx < _his_len);
}
row_t * row;
if (idx == _his_len) {
if (_his_len >= g_thread_cnt) {
// all entries are taken. recycle the oldest version if _his_len is too long already
ts_t min_ts = UINT64_MAX;
for (uint32_t i = 0; i < _his_len; i++) {
if (_write_history[i].valid && _write_history[i].ts < min_ts) {
min_ts = _write_history[i].ts;
idx = i;
}
}
assert(min_ts > _oldest_wts);
assert(_write_history[idx].row);
row = _row;
_row = _write_history[idx].row;
_write_history[idx].row = row;
_oldest_wts = min_ts;
_num_versions --;
} else {
// double the history size.
double_list(0);
_prewrite_ts = ts;
#if DEBUG_CC
for (uint32_t i = 0; i < _his_len / 2; i++)
assert(_write_history[i].valid);
assert(!_write_history[_his_len / 2].valid);
#endif
idx = _his_len / 2;
}
}
assert(idx != _his_len);
// some entries are not taken. But the row of that entry is NULL.
if (!_write_history[idx].row) {
_write_history[idx].row = (row_t *) _mm_malloc(sizeof(row_t), 64);
_write_history[idx].row->init(MAX_TUPLE_SIZE);
}
_write_history[idx].valid = false;
_write_history[idx].reserved = true;
_write_history[idx].ts = ts;
_exists_prewrite = true;
_prewrite_his_id = idx;
_prewrite_ts = ts;
return _write_history[idx].row;
}
