Revision created by MOE tool push_codebase.

MOE_MIGRATION=


git-svn-id: https://leveldb.googlecode.com/svn/trunk@22 62dab493-f737-651d-591e-8d6aee1b9529

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diff --git a/db/snapshot.h b/db/snapshot.h
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index 9a90756..0000000
--- a/db/snapshot.h
+++ /dev/null
@@ -1,66 +0,0 @@
-// Copyright (c) 2011 The LevelDB Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file. See the AUTHORS file for names of contributors.
-
-#ifndef STORAGE_LEVELDB_DB_SNAPSHOT_H_
-#define STORAGE_LEVELDB_DB_SNAPSHOT_H_
-
-#include "leveldb/db.h"
-
-namespace leveldb {
-
-class SnapshotList;
-
-// Snapshots are kept in a doubly-linked list in the DB.
-// Each Snapshot corresponds to a particular sequence number.
-class Snapshot {
- public:
-  SequenceNumber number_;  // const after creation
-
- private:
-  friend class SnapshotList;
-
-  // Snapshot is kept in a doubly-linked circular list
-  Snapshot* prev_;
-  Snapshot* next_;
-
-  SnapshotList* list_;                 // just for sanity checks
-};
-
-class SnapshotList {
- public:
-  SnapshotList() {
-    list_.prev_ = &list_;
-    list_.next_ = &list_;
-  }
-
-  bool empty() const { return list_.next_ == &list_; }
-  Snapshot* oldest() const { assert(!empty()); return list_.next_; }
-  Snapshot* newest() const { assert(!empty()); return list_.prev_; }
-
-  const Snapshot* New(SequenceNumber seq) {
-    Snapshot* s = new Snapshot;
-    s->number_ = seq;
-    s->list_ = this;
-    s->next_ = &list_;
-    s->prev_ = list_.prev_;
-    s->prev_->next_ = s;
-    s->next_->prev_ = s;
-    return s;
-  }
-
-  void Delete(const Snapshot* s) {
-    assert(s->list_ == this);
-    s->prev_->next_ = s->next_;
-    s->next_->prev_ = s->prev_;
-    delete s;
-  }
-
- private:
-  // Dummy head of doubly-linked list of snapshots
-  Snapshot list_;
-};
-
-}
-
-#endif  // STORAGE_LEVELDB_DB_SNAPSHOT_H_