Disk ARchive  2.5.9
Full featured and portable backup and archiving tool
memory_pool.hpp
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1 /*********************************************************************/
2 // dar - disk archive - a backup/restoration program
3 // Copyright (C) 2002-2052 Denis Corbin
4 //
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6 // modify it under the terms of the GNU General Public License
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9 //
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20 /*********************************************************************/
21 
26 
27 
28 #ifndef MEMORY_POOL_HPP
29 #define MEMORY_POOL_HPP
30 
31 #include "../my_config.h"
32 #include <map>
33 #include "mem_sized.hpp"
34 #include "erreurs.hpp"
35 
36 
37 namespace libdar
38 {
41 
42  class memory_pool
43  {
44  public:
45 #ifdef LIBDAR_SPECIAL_ALLOC
46  memory_pool() { carte.clear(); };
47 #else
48  memory_pool() { throw Efeature("Special allocation"); };
49 #endif
50  memory_pool(const memory_pool & ref) { throw SRC_BUG ; };
51  const memory_pool & operator = (const memory_pool & ref) { throw SRC_BUG; };
52  ~memory_pool() throw(Ebug);
53 
54 
60  void *alloc(size_t size);
61 
63  void release(void *ptr);
64 
66  void garbage_collect();
67 
69  bool is_empty() const { return carte.size() == 0; };
70 
72  std::string dump() const;
73 
74 #ifdef LIBDAR_DEBUG_MEMORY
75 
77  std::string max_percent_full() const;
78 #endif
79 
80  private:
81 
83  union alloc_ptr
84  {
85  mem_allocator *ptr;//< points to the mem_allocator that provided the block
86  U_I alignment__i; //< to properly align the allocated memory block that follows
87  U_32 alignment_32; //< to properly align the allocated memory block that follows
88  U_64 alignment_64; //< to properly align the allocated memory block that follows
89  };
90 
91  std::map<U_I, mem_sized *> carte; //< associate a requested block size to the corresponding mem_sized object
92 #ifdef LIBDAR_DEBUG_MEMORY
93  std::map<U_I, U_I> count; //< counts the usage of requests per requested block size
94 #endif
95  };
96 
98 
99 } // end of namespace
100 
101 #endif
defines mem_sized class that holds a variable sized set of fixed sized blocks using class mem_cluster...
contains all the excetion class thrown by libdar
libdar namespace encapsulate all libdar symbols
Definition: archive.hpp:47