OpenVDB: nanovdb/util/NodeManager.h Source File

OpenVDB 9.0.0

NodeManager.h
Go to the documentation of this file.
1// Copyright Contributors to the OpenVDB Project
2// SPDX-License-Identifier: MPL-2.0
3
4/*!
5 \file NodeManager.h
6
7 \author Ken Museth
8
9 \date February 12, 2021
10
11 \brief This class allows for sequential access to nodes in a NanoVDB tree.
12
13 \brief Currently it is limited to the host (CPU) but it can easily be ported
14 to the device (GPU) if sequential node access is required.
15*/
16
17#include "../NanoVDB.h"
18#include "Invoke.h"
19
20#ifndef NANOVDB_NODEMANAGER_H_HAS_BEEN_INCLUDED
21#define NANOVDB_NODEMANAGER_H_HAS_BEEN_INCLUDED
22
23namespace nanovdb {
24
25/// @brief NodeNanager maintains separate linear arrays of the three nodes types
26template<typename GridT>
27class NodeManager;
28
29/// @brief LeafNanager maintains a linear array of leaf nodes
30template<typename GridT>
31class LeafManager;
32
33/// @brief creates a NodeManager from a grid. Move semantics is used.
34template<typename GridT>
35NodeManager<GridT> createNodeMgr(GridT &grid);
36
37/// @brief creates a LeafManager from a grid. Move semantics is used.
38template<typename GridT>
39LeafManager<GridT> createLeafMgr(GridT &grid);
40
41/// @brief This host class allows for sequential access to nodes in a NanoVDB tree
42///
43/// @details Nodes are stored breadth first to allow for sequential access of nodes
44/// at a particular level.
45template<typename GridT>
46 class NodeManager
47{
48 using TreeT = typename GridTree<GridT>::type;
49 template<int LEVEL>
50 using NodeT = typename NodeTrait<TreeT, LEVEL>::type;
51 using RootT = NodeT<3>;// root node
52 using Node2 = NodeT<2>;// upper internal node
53 using Node1 = NodeT<1>;// lower internal node
54 using Node0 = NodeT<0>;// leaf node
55
56 template <typename T>
57 void sequential(T **nodes);
58
59public:
60 /// @brief Empty constructor
61 NodeManager();
62
63 /// @brief Construction from a grid
64 NodeManager(GridT &grid);
65
66 /// @brief Disallow copy construction
67 NodeManager(const NodeManager&) = delete;
68
69 /// @brief Move constructor
70 NodeManager(NodeManager&&);
71
72 /// @brief Destructor
73 ~NodeManager() { this->clear(); }
74
75 /// @brief Disallow copy assignment operator
76 NodeManager& operator=(const NodeManager&) = delete;
77
78 /// @brief Move assignment operator
79 NodeManager& operator=(NodeManager&&);
80
81 /// @brief Return true of this instance is uninitialized
82 bool empty() const { return mGrid == nullptr; }
83
84 /// @brief Return the memory footprint in bytes of this instance
85 inline size_t memUsage() const;
86
87 /// @brief Return a pointer to the grid, or NULL if it is uninitialized
88 GridT* grid() { return mGrid; }
89
90 /// @brief Return a pointer to the tree, or NULL if it is uninitialized
91 TreeT* tree() { return mTree; }
92
93 /// @brief Return a pointer to the root, or NULL if it is uninitialized
94 RootT* root() { return mRoot; }
95
96 /// @brief Return the number of tree nodes at the specified level
97 uint64_t nodeCount(int level) const { return mNodeCount[level]; }
98
99 /// @brief Return the i'th leaf node
100 ///
101 /// @warning Never call this method is the NodeManager is un-initialized
102 Node0* leaf( uint32_t i) const { return mLeafs[i]; }
103
104 /// @brief Return the i'th lower internal node
105 ///
106 /// @warning Never call this method is the NodeManager is un-initialized
107 Node1* lower(uint32_t i) const { return mLower[i]; }
108
109 /// @brief Return the i'th upper internal node
110 ///
111 /// @warning Never call this method is the NodeManager is un-initialized
112 Node2* upper(uint32_t i) const { return mUpper[i]; }
113
114private:
115
116 void clear();
117
118 GridT* mGrid;
119 TreeT* mTree;
120 RootT* mRoot;
121 uint64_t mNodeCount[3];
122 Node2** mUpper;
123 Node1** mLower;
124 Node0** mLeafs;
125}; // NodeManager<GridT> class
126
127template<typename GridT>
128NodeManager<GridT>::NodeManager()
129 : mGrid(nullptr)
130 , mTree(nullptr)
131 , mRoot(nullptr)
132 , mNodeCount{0,0,0}
133 , mUpper(nullptr)
134 , mLower(nullptr)
135 , mLeafs(nullptr)
136{
137}
138
139template<typename GridT>
140 NodeManager<GridT>::NodeManager(GridT &grid)
141 : mGrid(&grid)
142 , mTree(&grid.tree())
143 , mRoot(&grid.tree().root())
144 , mNodeCount{mTree->nodeCount(0), mTree->nodeCount(1), mTree->nodeCount(2)}
145 , mUpper(new Node2*[mNodeCount[2]])
146 , mLower(new Node1*[mNodeCount[1]])
147 , mLeafs(new Node0*[mNodeCount[0]])
148
149{
150 if (Node0::FIXED_SIZE && Node1::FIXED_SIZE && Node2::FIXED_SIZE &&// resolved at compile-time
151 grid.isBreadthFirst()) {
152#if 1
153 invoke([&](){this->sequential(mLeafs);},
154 [&](){this->sequential(mLower);},
155 [&](){this->sequential(mUpper);});
156#else
157 this->sequential(mLeafs);
158 this->sequential(mLower);
159 this->sequential(mUpper);
160#endif
161 } else {
162 auto **ptr2 = mUpper;
163 auto **ptr1 = mLower;
164 auto **ptr0 = mLeafs;
165 auto *data3 = mRoot->data();
166 // Performs depth first traversal but breadth first insertion
167 for (uint32_t i=0, size=data3->mTableSize; i<size; ++i) {
168 auto *tile = data3->tile(i);
169 if (!tile->isChild()) continue;
170 Node2 *node2 = data3->getChild(tile);
171 *ptr2++ = node2;
172 auto *data2 = node2->data();
173 for (auto it2 = data2->mChildMask.beginOn(); it2; ++it2) {
174 Node1 *node1 = data2->getChild(*it2);
175 *ptr1++ = node1;
176 auto *data1 = node1->data();
177 for (auto it1 = data1->mChildMask.beginOn(); it1; ++it1) {
178 Node0 *node0 = data1->getChild(*it1);
179 *ptr0++ = node0;
180 }// loop over child nodes of the lower internal node
181 }// loop over child nodes of the upper internal node
182 }// loop over child nodes of the root node
183 }
184}
185
186template<typename GridT>
187 NodeManager<GridT>::NodeManager(NodeManager &&other)
188 : mGrid(other.mGrid)
189 , mTree(other.mTree)
190 , mRoot(other.mRoot)
191 , mNodeCount{other.mNodeCount[0],other.mNodeCount[1],other.mNodeCount[2]}
192 , mUpper(other.mUpper)
193 , mLower(other.mLower)
194 , mLeafs(other.mLeafs)
195{
196 other.mGrid = nullptr;
197 other.mTree = nullptr;
198 other.mRoot = nullptr;
199 other.mNodeCount[0] = 0;
200 other.mNodeCount[1] = 0;
201 other.mNodeCount[2] = 0;
202 other.mUpper = nullptr;
203 other.mLower = nullptr;
204 other.mLeafs = nullptr;
205}
206
207template<typename GridT>
208 NodeManager<GridT>& NodeManager<GridT>::operator=(NodeManager &&other)
209{
210 this->clear();
211 mGrid = other.mGrid;
212 mTree = other.mTree;
213 mRoot = other.mRoot;
214 mNodeCount[0] = other.mNodeCount[0];
215 mNodeCount[1] = other.mNodeCount[1];
216 mNodeCount[2] = other.mNodeCount[2];
217 mUpper = other.mUpper;
218 mLower = other.mLower;
219 mLeafs = other.mLeafs;
220
221 other.mGrid = nullptr;
222 other.mTree = nullptr;
223 other.mRoot = nullptr;
224 other.mNodeCount[0] = 0;
225 other.mNodeCount[1] = 0;
226 other.mNodeCount[2] = 0;
227 other.mUpper = nullptr;
228 other.mLower = nullptr;
229 other.mLeafs = nullptr;
230
231 return *this;
232}
233
234template<typename GridT>
235void NodeManager<GridT>::clear()
236{
237 delete [] mUpper;
238 delete [] mLower;
239 delete [] mLeafs;
240}
241
242template<typename GridT>
243 size_t NodeManager<GridT>::memUsage() const
244{
245 return sizeof(*this) +
246 mNodeCount[0]*sizeof(Node0*) +
247 mNodeCount[1]*sizeof(Node1*) +
248 mNodeCount[2]*sizeof(Node2*);
249}
250
251template<typename GridT>
252 NodeManager<GridT> createNodeMgr(GridT &grid)
253{
254 NodeManager<GridT> mgr(grid);
255 return mgr;// // is converted to r-value so return value is move constructed!
256}
257
258
259template<typename GridT>
260template <typename T>
261void NodeManager<GridT>::sequential(T **nodes)
262{
263 NANOVDB_ASSERT(mGrid->template isSequential<T>());
264 auto *ptr = mTree->template getFirstNode<T>();
265 uint64_t n = mNodeCount[T::LEVEL] / 4;
266 while (n--) {// loop unrolling
267 *nodes++ = ptr++;
268 *nodes++ = ptr++;
269 *nodes++ = ptr++;
270 *nodes++ = ptr++;
271 }
272 n = mNodeCount[T::LEVEL] % 4;
273 while (n--) {// loop reminder
274 *nodes++ = ptr++;
275 }
276}
277
278//////////////////////////////////////////////////////////////////////////////
279
280template<typename GridT>
281 class LeafManager
282{
283 using LeafT = typename NodeTrait<typename GridTree<GridT>::type, 0>::type;
284
285public:
286 /// @brief Empty constructor
287 LeafManager() : mGrid(nullptr), mSize(0), mLeafs(nullptr) {}
288
289 /// @brief Construction from a grid
290 LeafManager(GridT &grid);
291
292 /// @brief Disallow copy construction
293 LeafManager(const LeafManager&) = delete;
294
295 /// @brief Move constructor
296 LeafManager(LeafManager&&);
297
298 /// @brief Destructor
299 ~LeafManager() { delete [] mLeafs; }
300
301 /// @brief Disallow copy assignment operator
302 LeafManager& operator=(const LeafManager&) = delete;
303
304 /// @brief Move assignment operator
305 LeafManager& operator=(LeafManager&&);
306
307 /// @brief Return true of this instance is un-initialized
308 bool empty() const { return mGrid == nullptr; }
309
310 /// @brief Return the memory footprint in bytes of this instance
311 size_t memUsage() const { return sizeof(*this) + mSize*sizeof(LeafT*); }
312
313 /// @brief Return a pointer to the grid, or NULL if it is uninitialized
314 GridT* grid() { return mGrid; }
315
316 /// @brief Return the number of leaf nodes
317 uint32_t size() const { return mSize; };
318
319 /// @brief Return the i'th leaf node
320 ///
321 /// @warning Never call this method is the LeafManager is uninitialized
322 LeafT* operator[](uint32_t i) const { return mLeafs[i]; };
323
324private:
325
326 GridT *mGrid;
327 uint32_t mSize;
328 LeafT **mLeafs;
329
330}; // LeafManager<GridT> class
331
332template<typename GridT>
333 LeafManager<GridT>::LeafManager(GridT &grid)
334 : mGrid(&grid), mSize(grid.tree().nodeCount(0)), mLeafs(nullptr)
335{
336 if (mSize>0) {
337 mLeafs = new LeafT*[mSize];
338 auto **leafs = mLeafs;
339 if (grid.template isSequential<LeafT>()) {
340 auto *ptr = grid.tree().template getFirstNode<LeafT>();
341 uint64_t n = mSize / 4;
342 while (n--) {// loop unrolling
343 *leafs++ = ptr++;
344 *leafs++ = ptr++;
345 *leafs++ = ptr++;
346 *leafs++ = ptr++;
347 }
348 n = mSize % 4;
349 while (n--) {// loop reminder
350 *leafs++ = ptr++;
351 }
352 } else {
353 auto *data3 = grid.tree().root().data();
354 for (uint32_t i=0, size=data3->mTableSize; i<size; ++i) {
355 auto *tile = data3->tile(i);
356 if (!tile->isChild()) continue;
357 auto *data2 = data3->getChild(tile)->data();
358 for (auto it2 = data2->mChildMask.beginOn(); it2; ++it2) {
359 auto *data1 = data2->getChild(*it2)->data();
360 for (auto it1 = data1->mChildMask.beginOn(); it1; ++it1) {
361 *leafs++ = data1->getChild(*it1);
362 }// loop over child nodes of the lower internal node
363 }// loop over child nodes of the upper internal node
364 }// loop over child nodes of the root node
365 }
366 }
367}
368
369template<typename GridT>
370 LeafManager<GridT>::LeafManager(LeafManager &&other)
371{
372 mGrid = other.mGrid;
373 mSize = other.mSize;
374 mLeafs = other.mLeafs;
375 other.mGrid = nullptr;
376 other.mSize = 0;
377 other.mLeafs = nullptr;
378}
379
380template<typename GridT>
381 LeafManager<GridT>& LeafManager<GridT>::operator=(LeafManager &&other)
382{
383 mGrid = other.mGrid;
384 mSize = other.mSize;
385 delete [] mLeafs;
386 mLeafs = other.mLeafs;
387 other.mGrid = nullptr;
388 other.mSize = 0;
389 other.mLeafs = nullptr;
390 return *this;
391}
392
393template<typename GridT>
394 LeafManager<GridT> createLeafMgr(GridT &grid)
395{
396 LeafManager<GridT> mgr(grid);
397 return mgr;// // is converted to r-value so return value is move constructed!
398}
399
400} // namespace nanovdb
401
402#endif // NANOVDB_NODEMANAGER_H_HAS_BEEN_INCLUDED
Invoke.h
A unified wrapper for tbb::parallel_invoke and a naive std::thread analog.
NANOVDB_ASSERT
#define NANOVDB_ASSERT(x)
Definition: NanoVDB.h:149
nanovdb::LeafManager
LeafNanager maintains a linear array of leaf nodes.
Definition: NodeManager.h:282
nanovdb::LeafManager::memUsage
size_t memUsage() const
Return the memory footprint in bytes of this instance.
Definition: NodeManager.h:311
nanovdb::LeafManager::size
uint32_t size() const
Return the number of leaf nodes.
Definition: NodeManager.h:317
nanovdb::LeafManager::empty
bool empty() const
Return true of this instance is un-initialized.
Definition: NodeManager.h:308
nanovdb::LeafManager::LeafManager
LeafManager()
Empty constructor.
Definition: NodeManager.h:287
nanovdb::LeafManager::operator[]
LeafT * operator[](uint32_t i) const
Return the i'th leaf node.
Definition: NodeManager.h:322
nanovdb::LeafManager::~LeafManager
~LeafManager()
Destructor.
Definition: NodeManager.h:299
nanovdb::LeafManager::grid
GridT * grid()
Return a pointer to the grid, or NULL if it is uninitialized.
Definition: NodeManager.h:314
nanovdb::LeafManager::operator=
LeafManager & operator=(const LeafManager &)=delete
Disallow copy assignment operator.
nanovdb::LeafManager::LeafManager
LeafManager(const LeafManager &)=delete
Disallow copy construction.
nanovdb::NodeManager
NodeNanager maintains separate linear arrays of the three nodes types.
Definition: NodeManager.h:47
nanovdb::NodeManager::NodeManager
NodeManager()
Empty constructor.
Definition: NodeManager.h:128
nanovdb::NodeManager::operator=
NodeManager & operator=(const NodeManager &)=delete
Disallow copy assignment operator.
nanovdb::NodeManager::memUsage
size_t memUsage() const
Return the memory footprint in bytes of this instance.
Definition: NodeManager.h:243
nanovdb::NodeManager::nodeCount
uint64_t nodeCount(int level) const
Return the number of tree nodes at the specified level.
Definition: NodeManager.h:97
nanovdb::NodeManager::NodeManager
NodeManager(const NodeManager &)=delete
Disallow copy construction.
nanovdb::NodeManager::leaf
Node0 * leaf(uint32_t i) const
Return the i'th leaf node.
Definition: NodeManager.h:102
nanovdb::NodeManager::empty
bool empty() const
Return true of this instance is uninitialized.
Definition: NodeManager.h:82
nanovdb::NodeManager::~NodeManager
~NodeManager()
Destructor.
Definition: NodeManager.h:73
nanovdb::NodeManager::grid
GridT * grid()
Return a pointer to the grid, or NULL if it is uninitialized.
Definition: NodeManager.h:88
nanovdb::NodeManager::lower
Node1 * lower(uint32_t i) const
Return the i'th lower internal node.
Definition: NodeManager.h:107
nanovdb::NodeManager::root
RootT * root()
Return a pointer to the root, or NULL if it is uninitialized.
Definition: NodeManager.h:94
nanovdb::NodeManager::upper
Node2 * upper(uint32_t i) const
Return the i'th upper internal node.
Definition: NodeManager.h:112
nanovdb::NodeManager::tree
TreeT * tree()
Return a pointer to the tree, or NULL if it is uninitialized.
Definition: NodeManager.h:91
nanovdb
Definition: Camera.h:16
nanovdb::createLeafMgr
LeafManager< GridT > createLeafMgr(GridT &grid)
creates a LeafManager from a grid. Move semantics is used.
Definition: NodeManager.h:394
nanovdb::createNodeMgr
NodeManager< GridT > createNodeMgr(GridT &grid)
creates a NodeManager from a grid. Move semantics is used.
Definition: NodeManager.h:252
nanovdb::invoke
int invoke(const Func &taskFunc1, Rest... taskFuncN)
Definition: Invoke.h:64
nanovdb::GridTree::type
typename GridT::TreeType type
Definition: NanoVDB.h:2529
nanovdb::NodeTrait
Struct to derive node type from its level in a given grid, tree or root while perserving constness.
Definition: NanoVDB.h:2096