1 //  Copyright (c) 2011-present, Facebook, Inc.  All rights reserved.
2 //  This source code is licensed under both the GPLv2 (found in the
3 //  COPYING file in the root directory) and Apache 2.0 License
4 //  (found in the LICENSE.Apache file in the root directory).
5 
6 #pragma once
7 
8 #include "rocksdb/cache.h"
9 #include "rocksdb/rocksdb_namespace.h"
10 
11 namespace ROCKSDB_NAMESPACE {
12 
13 template <typename T>
14 class SimpleDeleter : public Cache::Deleter {
15  public:
GetInstance()16   static SimpleDeleter* GetInstance() {
17     static auto deleter = new SimpleDeleter;
18     return deleter;
19   }
20 
operator()21   void operator()(const Slice& /* key */, void* value) override {
22     T* const t = static_cast<T*>(value);
23     delete t;
24   }
25 
26  private:
27   SimpleDeleter() = default;
28 };
29 
30 template <typename T>
31 class SimpleDeleter<T[]> : public Cache::Deleter {
32  public:
GetInstance()33   static SimpleDeleter* GetInstance() {
34     static auto deleter = new SimpleDeleter;
35     return deleter;
36   }
37 
operator()38   void operator()(const Slice& /* key */, void* value) override {
39     T* const t = static_cast<T*>(value);
40     delete[] t;
41   }
42 
43  private:
44   SimpleDeleter() = default;
45 };
46 
47 }  // namespace ROCKSDB_NAMESPACE
48