DUNE-FEM (unstable)

objectstack.hh
1#ifndef DUNE_FEM_OBJECTSTACK_HH
2#define DUNE_FEM_OBJECTSTACK_HH
3
4#include <dune/fem/storage/referencecounter.hh>
5#include <dune/fem/misc/threads/threadsafevalue.hh>
6
7namespace Dune
8{
9
10 namespace Fem
11 {
12
13 template< class ObjectFactoryImp >
14 class ObjectStack;
15
16 template< class ObjectFactoryImp >
17 class ObjectStackEntry;
18
19
20 template< class ObjectFactoryImp >
21 struct ObjectStackEntryTraits
22 {
23 typedef ObjectStackEntry< ObjectFactoryImp > ReferenceCounterType;
24
25 typedef typename ObjectFactoryImp :: ObjectType ObjectType;
26 };
27
28
29 template< class ObjectFactoryImp >
30 class ObjectStackEntry
31 : public ReferenceCounterDefault< ObjectStackEntryTraits< ObjectFactoryImp > >
32 {
33 public:
34 typedef ObjectFactoryImp ObjectFactoryType;
35
36 typedef ObjectStackEntryTraits< ObjectFactoryType > Traits;
37
38 private:
39 typedef ObjectStackEntry< ObjectFactoryType > ThisType;
40 typedef ReferenceCounterDefault< Traits > BaseType;
41
42 friend class ObjectStack< ObjectFactoryType >;
43
44 protected:
45 typedef ObjectStack< ObjectFactoryType > ObjectStackType;
46
47 public:
48 typedef typename ObjectFactoryType :: ObjectType ObjectType;
49
50 protected:
51 // reference to the stack
52 ObjectStackType &stack_;
53
54 // pointer to the actual object
55 ObjectType *const object_;
56
57 // next object on the stack
58 ThisType *next_;
59
60 inline explicit ObjectStackEntry ( ObjectStackType &stack )
61 : BaseType( 0 ),
62 stack_( stack ),
63 object_( stack_.factory().newObject() )
64 {
65 }
66
67 public:
68 ObjectStackEntry ( const ThisType& ) = delete;
69
70 inline ~ObjectStackEntry ()
71 {
72 delete object_;
73 }
74
75 ThisType& operator= ( const ThisType& ) = delete;
76
77 inline operator const ObjectType& () const
78 {
79 return *object_;
80 }
81
82 inline operator ObjectType& ()
83 {
84 return *object_;
85 }
86
87 inline void deleteObject ()
88 {
89 stack_.push( this );
90 }
91
92 inline const ObjectType &getObject () const
93 {
94 return *object_;
95 }
96
97 inline ObjectType &getObject ()
98 {
99 return *object_;
100 }
101 };
102
103
104
108 template< class ObjectFactoryImp >
110 {
111 typedef ObjectFactoryImp ObjectFactoryType;
112
113 private:
115
116 friend class ObjectStackEntry< ObjectFactoryType >;
117
118 public:
120 typedef typename ObjectFactoryType :: ObjectType ObjectType;
121
123 typedef ObjectStackEntry< ObjectFactoryType > StackEntryType;
124
127
128 protected:
129 const ObjectFactoryType &factory_;
130
131 // store stack such that entries are thread safe
132 typedef StackEntryType* StackEntryPtrType;
134
135 // thread safe stack entries (in multi thread mode a vector)
136 ThreadSafeValuesType stackEntries_;
137 public:
139 ObjectStack ( const ObjectFactoryType &factory )
140 : factory_( factory ),
141 stackEntries_( StackEntryPtrType(0) )
142 {
143 }
144
145 ObjectStack ( const ThisType& ) = delete;
146
149 {
150 // make sure this is only called in single thread mode
151 // because the master thread is taking care of all object delete
152 assert( MPIManager::singleThreadMode() );
153 const size_t threadSize = stackEntries_.size();
154 for( size_t i=0; i<threadSize; ++i )
155 {
156 StackEntryPtrType& stackEntry = stackEntries_[ i ];
157 while ( stackEntry != 0 )
158 {
159 StackEntryType *obj = stackEntry;
160 stackEntry = obj->next_;
161 delete obj;
162 }
163 }
164 }
165
166 ThisType& operator= ( const ThisType& ) = delete;
167
170 {
171 return PointerType( pop() );
172 }
173
174 protected:
175 inline const ObjectFactoryType &factory() const
176 {
177 return factory_;
178 }
179
180 // push storage object to the stack
181 inline void push ( StackEntryType *obj )
182 {
183 // get thread private value
184 push( obj, *stackEntries_ );
185 }
186
187 // pop a storage object from the stack
188 inline StackEntryType *pop ()
189 {
190 // get thread private value
191 return pop( *stackEntries_ );
192 }
193
194 private:
195 // push storage object to the stack
196 inline void push ( StackEntryType *obj, StackEntryPtrType& stackEntry )
197 {
198 obj->next_ = stackEntry;
199 stackEntry = obj;
200 }
201
202 // pop a storage object from the stack
203 inline StackEntryType *pop ( StackEntryPtrType& stackEntry )
204 {
205 StackEntryType *ptr = stackEntry;
206 if( ptr != 0 )
207 stackEntry = stackEntry->next_;
208 else
209 ptr = new StackEntryType( *this );
210 return ptr;
211 }
212 };
213
214 } // namespace Fem
215
216} // namespace Dune
217
218#endif // #ifndef DUNE_FEM_OBJECTSTACK_HH
models a pointer to a reference countable object
Definition: referencecounter.hh:224
Definition: objectstack.hh:110
~ObjectStack()
delete all objects on stack
Definition: objectstack.hh:148
ObjectFactoryType::ObjectType ObjectType
type of the stored objects
Definition: objectstack.hh:120
ObjectStack(const ObjectFactoryType &factory)
constructor
Definition: objectstack.hh:139
ObjectStackEntry< ObjectFactoryType > StackEntryType
type of the storage objects
Definition: objectstack.hh:123
PointerType getObject()
get an object pointer to a storage object
Definition: objectstack.hh:169
ObjectPointer< StackEntryType > PointerType
type of object pointers
Definition: objectstack.hh:126
size_t size() const
return number of threads
Definition: threadsafevalue.hh:62
Dune namespace.
Definition: alignedallocator.hh:13
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