// GetSSTables retrieves metadata about this engine's live sstables.
func (r *RocksDB) GetSSTables() SSTableInfos {
var n C.int
tables := C.DBGetSSTables(r.rdb, &n)
// We can't index into tables because it is a pointer, not a slice. The
// hackery below treats the pointer as an array and then constructs a slice
// from it.
tablesPtr := uintptr(unsafe.Pointer(tables))
tableSize := unsafe.Sizeof(C.DBSSTable{})
tableVal := func(i int) C.DBSSTable {
return *(*C.DBSSTable)(unsafe.Pointer(tablesPtr + uintptr(i)*tableSize))
}
res := make(SSTableInfos, n)
for i := range res {
r := &res[i]
tv := tableVal(i)
r.Level = int(tv.level)
r.Size = int64(tv.size)
r.Start = cToGoKey(tv.start_key)
r.End = cToGoKey(tv.end_key)
if ptr := tv.start_key.key.data; ptr != nil {
C.free(unsafe.Pointer(ptr))
}
if ptr := tv.end_key.key.data; ptr != nil {
C.free(unsafe.Pointer(ptr))
}
}
C.free(unsafe.Pointer(tables))
sort.Sort(res)
return res
}
// GetSSTables retrieves metadata about this engine's live sstables.
func (r *RocksDB) GetSSTables() SSTableInfos {
var n C.int
tables := C.DBGetSSTables(r.rdb, &n)
// We can't index into tables because it is a pointer, not a slice. The
// hackery below treats the pointer as an array and then constructs a slice
// from it.
const maxLen = 0x7fffffff
tableSlice := (*[maxLen]C.DBSSTable)(unsafe.Pointer(tables))[:n:n]
res := make(SSTableInfos, n)
for i := 0; i < int(n); i++ {
res[i].Level = int(tableSlice[i].level)
res[i].Size = int64(tableSlice[i].size)
res[i].Start = cToGoKey(tableSlice[i].start_key)
res[i].End = cToGoKey(tableSlice[i].end_key)
if ptr := tableSlice[i].start_key.key.data; ptr != nil {
C.free(unsafe.Pointer(ptr))
}
if ptr := tableSlice[i].end_key.key.data; ptr != nil {
C.free(unsafe.Pointer(ptr))
}
}
C.free(unsafe.Pointer(tables))
sort.Sort(res)
return res
}