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