func (s *dbStore) GetSnapshot(ver kv.Version) (kv.MvccSnapshot, error) {
s.mu.RLock()
closed := s.closed
s.mu.RUnlock()
if closed {
return nil, errors.Trace(ErrDBClosed)
}
providerMu.RLock()
currentVer, err := globalVersionProvider.CurrentVersion()
providerMu.RUnlock()
if err != nil {
return nil, errors.Trace(err)
}
if ver.Cmp(currentVer) > 0 {
ver = currentVer
}
return &dbSnapshot{
store: s,
db: s.db,
version: ver,
}, nil
}
func (s *dbStore) GetSnapshot(ver kv.Version) (kv.Snapshot, error) {
s.mu.RLock()
if s.closed {
s.mu.RUnlock()
return nil, ErrDBClosed
}
s.mu.RUnlock()
currentVer, err := globalVersionProvider.CurrentVersion()
if err != nil {
return nil, errors.Trace(err)
}
if ver.Cmp(currentVer) > 0 {
ver = currentVer
}
return &dbSnapshot{
store: s,
version: ver,
}, nil
}