1 package leveldb
2
3 import (
4 "github.com/syndtr/goleveldb/leveldb/storage"
5 "sync/atomic"
6 )
7
8 type iStorage struct {
9 storage.Storage
10 read uint64
11 write uint64
12 }
13
14 func (c *iStorage) Open(fd storage.FileDesc) (storage.Reader, error) {
15 r, err := c.Storage.Open(fd)
16 return &iStorageReader{r, c}, err
17 }
18
19 func (c *iStorage) Create(fd storage.FileDesc) (storage.Writer, error) {
20 w, err := c.Storage.Create(fd)
21 return &iStorageWriter{w, c}, err
22 }
23
24 func (c *iStorage) reads() uint64 {
25 return atomic.LoadUint64(&c.read)
26 }
27
28 func (c *iStorage) writes() uint64 {
29 return atomic.LoadUint64(&c.write)
30 }
31
32
33 func newIStorage(s storage.Storage) *iStorage {
34 return &iStorage{s, 0, 0}
35 }
36
37 type iStorageReader struct {
38 storage.Reader
39 c *iStorage
40 }
41
42 func (r *iStorageReader) Read(p []byte) (n int, err error) {
43 n, err = r.Reader.Read(p)
44 atomic.AddUint64(&r.c.read, uint64(n))
45 return n, err
46 }
47
48 func (r *iStorageReader) ReadAt(p []byte, off int64) (n int, err error) {
49 n, err = r.Reader.ReadAt(p, off)
50 atomic.AddUint64(&r.c.read, uint64(n))
51 return n, err
52 }
53
54 type iStorageWriter struct {
55 storage.Writer
56 c *iStorage
57 }
58
59 func (w *iStorageWriter) Write(p []byte) (n int, err error) {
60 n, err = w.Writer.Write(p)
61 atomic.AddUint64(&w.c.write, uint64(n))
62 return n, err
63 }
64
View as plain text