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block-allocator.hpp
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3  * Main authors:
4  * Christian Schulte <schulte@gecode.org>
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7  * Christian Schulte, 2004
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33 
34 namespace Gecode { namespace Support {
35 
44  template<class T, class A, int blocksize = 512>
46  private:
48  A& a;
50  class Block {
51  public:
52  T b[blocksize];
53  Block* next;
54  };
56  Block* b;
58  T* n;
60  size_t _size;
62  void allocate(void);
63  public:
69  A& allocator(void);
71  T* operator ()(void);
73  size_t size(void) const;
74  };
75 
83  template<class T, class A, int blocksize = 512>
84  class BlockClient {
85  public:
87  static void* operator new(size_t s, BlockAllocator<T,A,blocksize>& ba);
89  static void operator delete(void*, BlockAllocator<T,A,blocksize>& ba);
91  static void operator delete(void*);
92  };
93 
94 
95 
96  template<class T, class A, int blocksize>
99  b = static_cast<Block*>(a.ralloc(sizeof(Block)));
100  b->next = NULL;
101  n = &b->b[blocksize];
102  _size = sizeof(Block);
103  }
104 
105  template<class T, class A, int blocksize>
108  while (b != NULL) {
109  Block* f = b; b = b->next;
110  a.rfree(f,sizeof(Block));
111  }
112  }
113 
114  template<class T, class A, int blocksize>
115  forceinline A&
117  return a;
118  }
119 
120  template<class T, class A, int blocksize>
121  forceinline T*
123  T* t = --n;
124  if (t == &b->b[0])
125  allocate();
126  return t;
127  }
128 
129  template<class T, class A, int blocksize>
130  void
132  // Allocate another block
133  Block* nb = static_cast<Block*>(a.ralloc(sizeof(Block)));
134  nb->next = b; b = nb;
135  n = &nb->b[blocksize];
136  _size += sizeof(Block);
137  }
138 
139  template<class T, class A, int blocksize>
140  forceinline size_t
142  return _size;
143  }
144 
145 
146 
147  template<class T, class A, int blocksize>
148  forceinline void
150  delete(void*,BlockAllocator<T,A,blocksize>&) {
151  }
152  template<class T, class A, int blocksize>
153  forceinline void
155  }
156  template<class T, class A, int blocksize>
157  forceinline void*
160  return ba();
161  }
162 
163 }}
164 
165 // STATISTICS: support-any
struct Gecode::@602::NNF::@65::@66 b
For binary nodes (and, or, eqv)
NodeType t
Type of node.
Definition: bool-expr.cpp:230
int n
Number of negative literals for node type.
Definition: bool-expr.cpp:234
struct Gecode::@602::NNF::@65::@67 a
For atomic nodes.
Manage memory organized into block lists (allocator)
A & allocator(void)
Return allocator used.
~BlockAllocator(void)
Free all allocated blocks.
size_t size(void) const
Return size of memory required by allocator.
T * operator()(void)
Return memory of size required by T.
Client for block allocator of type T.
IntPropLevel ba(IntPropLevel ipl)
Extract basic or advanced from propagation level.
Definition: ipl.hpp:43
#define forceinline
Definition: config.hpp:185