Electroneum
mlocker.h
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28 
29 #pragma once
30 
31 #include <map>
32 #include <boost/thread/mutex.hpp>
33 
34 namespace epee
35 {
36  class mlocker
37  {
38  public:
39  mlocker(void *ptr, size_t len);
40  ~mlocker();
41 
42  static size_t get_page_size();
43  static size_t get_num_locked_pages();
44  static size_t get_num_locked_objects();
45 
46  static void lock(void *ptr, size_t len);
47  static void unlock(void *ptr, size_t len);
48 
49  private:
50  static size_t page_size;
51  static size_t num_locked_objects;
52 
53  static boost::mutex &mutex();
54  static std::map<size_t, unsigned int> &map();
55  static void lock_page(size_t page);
56  static void unlock_page(size_t page);
57 
58  void *ptr;
59  size_t len;
60  };
61 
65  // to disk
66  template <class T>
67  struct mlocked : public T {
68  using type = T;
69 
70  mlocked(): T() { mlocker::lock(this, sizeof(T)); }
71  mlocked(const T &t): T(t) { mlocker::lock(this, sizeof(T)); }
72  mlocked(const mlocked<T> &mt): T(mt) { mlocker::lock(this, sizeof(T)); }
73  mlocked(const T &&t): T(t) { mlocker::lock(this, sizeof(T)); }
74  mlocked(const mlocked<T> &&mt): T(mt) { mlocker::lock(this, sizeof(T)); }
75  mlocked<T> &operator=(const mlocked<T> &mt) { T::operator=(mt); return *this; }
76  ~mlocked() { try { mlocker::unlock(this, sizeof(T)); } catch (...) { /* do not propagate */ } }
77  };
78 
79  template<typename T>
80  T& unwrap(mlocked<T>& src) { return src; }
81 
82  template<typename T>
83  const T& unwrap(mlocked<T> const& src) { return src; }
84 
85  template <class T, size_t N>
87 }
const uint32_t T[512]
mlocked(const T &&t)
Definition: mlocker.h:73
static void lock(void *ptr, size_t len)
Definition: mlocker.cpp:126
static size_t get_page_size()
Definition: mlocker.cpp:107
mlocked(const mlocked< T > &mt)
Definition: mlocker.h:72
mlocker(void *ptr, size_t len)
Definition: mlocker.cpp:115
mlocked(const T &t)
Definition: mlocker.h:71
tools::scrubbed< ec_scalar > type
Definition: mlocker.h:68
mlocked< T > & operator=(const mlocked< T > &mt)
Definition: mlocker.h:75
static size_t get_num_locked_objects()
Definition: mlocker.cpp:167
static size_t get_num_locked_pages()
Definition: mlocker.cpp:161
mlocked(const mlocked< T > &&mt)
Definition: mlocker.h:74
static void unlock(void *ptr, size_t len)
Definition: mlocker.cpp:144
T & unwrap(mlocked< T > &src)
Definition: mlocker.h:80
connection< TProtocol > & operator=(const connection< TProtocol > &obj)