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package leveldb
import (
"github.com/syndtr/goleveldb/leveldb/storage"
"sync/atomic"
)
type iStorage struct {
storage.Storage
read uint64
write uint64
}
func (c *iStorage) Open(fd storage.FileDesc) (storage.Reader, error) {
r, err := c.Storage.Open(fd)
return &iStorageReader{r, c}, err
}
func (c *iStorage) Create(fd storage.FileDesc) (storage.Writer, error) {
w, err := c.Storage.Create(fd)
return &iStorageWriter{w, c}, err
}
func (c *iStorage) reads() uint64 {
return atomic.LoadUint64(&c.read)
}
func (c *iStorage) writes() uint64 {
return atomic.LoadUint64(&c.write)
}
// newIStorage returns the given storage wrapped by iStorage.
func newIStorage(s storage.Storage) *iStorage {
return &iStorage{s, 0, 0}
}
type iStorageReader struct {
storage.Reader
c *iStorage
}
func (r *iStorageReader) Read(p []byte) (n int, err error) {
n, err = r.Reader.Read(p)
atomic.AddUint64(&r.c.read, uint64(n))
return n, err
}
func (r *iStorageReader) ReadAt(p []byte, off int64) (n int, err error) {
n, err = r.Reader.ReadAt(p, off)
atomic.AddUint64(&r.c.read, uint64(n))
return n, err
}
type iStorageWriter struct {
storage.Writer
c *iStorage
}
func (w *iStorageWriter) Write(p []byte) (n int, err error) {
n, err = w.Writer.Write(p)
atomic.AddUint64(&w.c.write, uint64(n))
return n, err
}
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