OpenVDB: openvdb_ax/compiler/PointExecutable.h Source File

OpenVDB 12.1.1

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PointExecutable.h
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1// Copyright Contributors to the OpenVDB Project
2// SPDX-License-Identifier: Apache-2.0
3
4/// @file compiler/PointExecutable.h
5///
6/// @authors Nick Avramoussis, Francisco Gochez, Richard Jones
7///
8/// @brief The PointExecutable, produced by the OpenVDB AX Compiler for
9/// execution over OpenVDB Points Grids.
10///
11
12#ifndef OPENVDB_AX_COMPILER_POINT_EXECUTABLE_HAS_BEEN_INCLUDED
13#define OPENVDB_AX_COMPILER_POINT_EXECUTABLE_HAS_BEEN_INCLUDED
14
15#include "CustomData.h"
16#include "AttributeRegistry.h"
17#include "AttributeBindings.h"
18
19#include <openvdb/openvdb.h>
20#include <openvdb/version.h>
21#include <openvdb/points/PointDataGrid.h>
22
23#include <llvm/Config/llvm-config.h>
24
25#include <unordered_map>
26
27struct TestPointExecutableAcc;
28
29namespace llvm {
30class ExecutionEngine;
31class LLVMContext;
32 namespace orc {
33class LLJIT;
34}
35}
36
37namespace openvdb {
38 OPENVDB_USE_VERSION_NAMESPACE
39namespace OPENVDB_VERSION_NAME {
40namespace ax {
41
42class Compiler;
43
44/// @brief Object that encapsulates compiled AX code which can be executed on a
45/// collection of VDB Point Data grids. Executables are created by the
46/// compiler and hold the final immutable JIT compiled function and context.
47/// @details The PointExecutable is returned from the ax::Compiler when
48/// compiling AX code for point execution. The class represents a typical AX
49/// executable object; immutable except for execution settings and implements
50/// 'execute' functions which can be called multiple times for arbitrary sets
51/// of inputs. The intended usage of these executables is to configure their
52/// runtime arguments and then call PointExecutable::execute with your VDBs.
53/// For example:
54/// @code
55/// PointExecutable::Ptr exe = compiler.compile<PointExecutable>("@a += 1");
56/// exe->setCreateMissing(false); // fail on missing attributes
57/// exe->setGroupExecution("group1"); // only process points in group1
58/// exe->execute(vdbs); // run on a set of vdb point data grids
59/// exe->execute(points); // run on a single point data grid
60/// @endcode
61///
62/// The setCreateMissing is initialised with specific configurable settings:
63/// - Create Missing: True
64/// By default, create any missing attributes that were accessed
65/// @sa setCreateMissing
66/// - Group Execution: All
67/// By default, process all points regardless of their group membership
68/// @sa setGroupExecution
69/// - Grain size: 1
70/// The default grain sizes passed to the tbb partitioner for leaf level
71/// processing.
72/// @sa setGrainSize
73///
74/// For more in depth information, see the @ref vdbaxcompilerexe documentation.
75 class OPENVDB_AX_API PointExecutable
76{
77public:
78 using Ptr = std::shared_ptr<PointExecutable>;
79 ~PointExecutable();
80
81 /// @brief Copy constructor. Shares the LLVM constructs but deep copies the
82 /// settings. Multiple copies of an executor can be used at the same time
83 /// safely.
84 PointExecutable(const PointExecutable& other);
85
86 ////////////////////////////////////////////////////////
87
88 /// @brief Run this point executable binary on a target PointDataGrid.
89 /// @details This method reads from the stored settings on the executable
90 /// to determine certain behaviour and runs the JIT compiled function
91 /// across every valid point. Point attributes may be created, deleted
92 /// collapsed or expanded, and points themselves may be added, deleted
93 /// or moved.
94 ///
95 /// This method is thread safe; it can be run concurrently from the same
96 /// PointExecutable instance on different inputs.
97 ///
98 /// @param grid The PointDataGrid to process
99 void execute(points::PointDataGrid& grid) const;
100
101 ////////////////////////////////////////////////////////
102
103 /// @brief Set a specific point group to execute over. The default is none,
104 /// which corresponds to all points. Note that this can also be compiled
105 /// into the AX function using the ingroup("mygroup") method.
106 /// @warning If the group does not exist during execute, a runtime error
107 /// will be thrown.
108 /// @param name The name of the group to execute over
109 void setGroupExecution(const std::string& name);
110 /// @return The points group to be processed. Default is empty, which is
111 /// all points.
112 const std::string& getGroupExecution() const;
113
114 /// @brief Set the behaviour when missing point attributes are accessed.
115 /// Default behaviour is true, which creates them with default initial
116 /// values. If false, a missing attribute runtime error will be thrown
117 /// on missing accesses.
118 /// @param flag Enables or disables the creation of missing attributes
119 void setCreateMissing(const bool flag);
120 /// @return Whether this executable will generate new point attributes.
121 bool getCreateMissing() const;
122
123 /// @brief Set the threading grain size. Default is 1. A value of 0 has the
124 /// effect of disabling multi-threading.
125 /// @param grain The grain size
126 void setGrainSize(const size_t grain);
127 /// @return The current grain size
128 size_t getGrainSize() const;
129
130 /// @brief Set attribute bindings.
131 /// @param bindings A map of attribute bindings to expected names on
132 /// the geometry to be executed over. By default the AX attributes will be
133 /// bound to point attributes of the same name. Supplying bindings
134 /// for a subset of the attributes will leave the others unchanged.
135 /// AX attributes can only bind to a single point attribute and vice versa.
136 /// However, in a single set call these can be swapped e.g. a -> b and b -> a.
137 /// When bindings are overriden through subsequent calls to this function,
138 /// any dangling point attributes will be automatically bound by name.
139 /// To reset these bindings call get function and create a target set of bindings
140 /// for each attribute of name -> name.
141 void setAttributeBindings(const AttributeBindings& bindings);
142 /// @return The current attribute bindings map
143 const AttributeBindings& getAttributeBindings() const;
144
145 ////////////////////////////////////////////////////////
146
147 // foward declaration of settings for this executable
148 template <bool> struct Settings;
149
150 /// @brief Command Line Interface handling for the PointExecutable.
151 /// @details This class wraps the logic for converting commands specific
152 /// to the PointExecutable to the internal Settings. Subsequent
153 /// executables can be initialized from the CLI object that gets created
154 struct OPENVDB_AX_API CLI
155 {
156 ~CLI();
157 CLI(CLI&&);
158 CLI& operator=(CLI&&);
159 static CLI create(size_t argc, const char* argv[], bool* used=nullptr);
160 static void usage(std::ostream& os, const bool verbose);
161 private:
162 friend class PointExecutable;
163 CLI();
164 std::unique_ptr<Settings<true>> mSettings;
165 };
166
167 /// @brief Intialize the Settings of this executables from the CLI object
168 /// @param cli The CLI object
169 void setSettingsFromCLI(const CLI& cli);
170
171 ////////////////////////////////////////////////////////
172
173private:
174 friend class Compiler;
175 friend struct ::TestPointExecutableAcc;
176
177 /// @brief Private method used in the unit tests
178 bool usesAcceleratedKernel(const points::PointDataTree& tree) const;
179
180 /// @brief Constructor, expected to be invoked by the compiler. Should not
181 /// be invoked directly.
182 /// @param context Shared pointer to an llvm:LLVMContext associated with the
183 /// execution engine
184 /// @param engine Shared pointer to an llvm::ExecutionEngine used to build
185 /// functions. Context should be the associated LLVMContext
186 /// @param attributeRegistry Registry of attributes accessed by AX code
187 /// @param customData Custom data which will be shared by this executable.
188 /// It can be used to retrieve external data from within the AX code
189 /// @param functions A map of function names to physical memory addresses
190 /// which were built by llvm using engine
191 /// @param tree The AST linked to this executable. The AST is not stored
192 /// after compilation, but can be used during construction of the exe to
193 /// infer some pre/post processing optimisations.
194 PointExecutable(
195#if LLVM_VERSION_MAJOR <= 15
196 const std::shared_ptr<const llvm::LLVMContext>& context,
197 const std::shared_ptr<const llvm::ExecutionEngine>& engine,
198#else
199 const std::shared_ptr<const llvm::orc::LLJIT>& mExecutionEngine,
200#endif
201 const AttributeRegistry::ConstPtr& attributeRegistry,
202 const CustomData::ConstPtr& customData,
203 const std::unordered_map<std::string, uint64_t>& functions,
204 const ast::Tree& tree);
205
206private:
207#if LLVM_VERSION_MAJOR <= 15
208 // The Context and ExecutionEngine must exist _only_ for object lifetime
209 // management. The ExecutionEngine must be destroyed before the Context
210 const std::shared_ptr<const llvm::LLVMContext> mContext;
211 const std::shared_ptr<const llvm::ExecutionEngine> mExecutionEngine;
212#else
213 const std::shared_ptr<const llvm::orc::LLJIT> mExecutionEngine;
214#endif
215 const AttributeRegistry::ConstPtr mAttributeRegistry;
216 const CustomData::ConstPtr mCustomData;
217 const std::unordered_map<std::string, uint64_t> mFunctionAddresses;
218 std::unique_ptr<Settings<false>> mSettings;
219};
220
221} // namespace ax
222} // namespace OPENVDB_VERSION_NAME
223} // namespace openvdb
224
225#endif // OPENVDB_AX_COMPILER_POINT_EXECUTABLE_HAS_BEEN_INCLUDED
226
AttributeBindings.h
The Attribute Bindings class is used by the compiled Executables to handle the mapping of AX Attribut...
AttributeRegistry.h
These classes contain lists of expected attributes and volumes which are populated by compiler during...
CustomData.h
Access to the CustomData class which can provide custom user user data to the OpenVDB AX Compiler.
OPENVDB_AX_API
#define OPENVDB_AX_API
Definition Platform.h:312
PointDataGrid.h
Attribute-owned data structure for points. Point attributes are stored in leaf nodes and ordered by v...
openvdb::v12_1::ax::AttributeBindings
This class wraps an interface for a map of attribute bindings. These map attributes in AX code to con...
Definition AttributeBindings.h:37
openvdb::v12_1::ax::AttributeRegistry::ConstPtr
std::shared_ptr< const AttributeRegistry > ConstPtr
Definition AttributeRegistry.h:43
openvdb::v12_1::ax::CustomData::ConstPtr
std::shared_ptr< const CustomData > ConstPtr
Definition CustomData.h:38
openvdb::v12_1::ax::PointExecutable::getGroupExecution
const std::string & getGroupExecution() const
openvdb::v12_1::ax::PointExecutable::setCreateMissing
void setCreateMissing(const bool flag)
Set the behaviour when missing point attributes are accessed. Default behaviour is true,...
openvdb::v12_1::ax::PointExecutable::getAttributeBindings
const AttributeBindings & getAttributeBindings() const
openvdb::v12_1::ax::PointExecutable::Ptr
std::shared_ptr< PointExecutable > Ptr
Definition PointExecutable.h:78
openvdb::v12_1::ax::PointExecutable::execute
void execute(points::PointDataGrid &grid) const
Run this point executable binary on a target PointDataGrid.
openvdb::v12_1::ax::PointExecutable::PointExecutable
PointExecutable(const PointExecutable &other)
Copy constructor. Shares the LLVM constructs but deep copies the settings. Multiple copies of an exec...
openvdb::v12_1::ax::PointExecutable::Compiler
friend class Compiler
Definition PointExecutable.h:174
openvdb::v12_1::ax::PointExecutable::setGrainSize
void setGrainSize(const size_t grain)
Set the threading grain size. Default is 1. A value of 0 has the effect of disabling multi-threading.
openvdb::v12_1::ax::PointExecutable::setGroupExecution
void setGroupExecution(const std::string &name)
Set a specific point group to execute over. The default is none, which corresponds to all points....
openvdb::v12_1::ax::PointExecutable::getGrainSize
size_t getGrainSize() const
openvdb::v12_1::ax::PointExecutable::~PointExecutable
~PointExecutable()
openvdb::v12_1::ax::PointExecutable::setSettingsFromCLI
void setSettingsFromCLI(const CLI &cli)
Intialize the Settings of this executables from the CLI object.
openvdb::v12_1::ax::PointExecutable::getCreateMissing
bool getCreateMissing() const
openvdb::v12_1::ax::PointExecutable::setAttributeBindings
void setAttributeBindings(const AttributeBindings &bindings)
Set attribute bindings.
llvm::orc
Definition PointExecutable.h:32
llvm
Definition FunctionRegistry.h:23
openvdb::v12_1::points::PointDataTree
tree::Tree< tree::RootNode< tree::InternalNode< tree::InternalNode< PointDataLeafNode< PointDataIndex32, 3 >, 4 >, 5 > > > PointDataTree
Point index tree configured to match the default VDB configurations.
Definition PointDataGrid.h:190
openvdb::v12_1::points::PointDataGrid
Grid< PointDataTree > PointDataGrid
Point data grid.
Definition PointDataGrid.h:195
openvdb::v12_1::tree
Definition PointDataGrid.h:170
openvdb
Definition Exceptions.h:13
openvdb.h
openvdb::v12_1::ax::PointExecutable::CLI
Command Line Interface handling for the PointExecutable.
Definition PointExecutable.h:155
openvdb::v12_1::ax::PointExecutable::CLI::CLI
CLI(CLI &&)
openvdb::v12_1::ax::PointExecutable::CLI::operator=
CLI & operator=(CLI &&)
openvdb::v12_1::ax::PointExecutable::CLI::usage
static void usage(std::ostream &os, const bool verbose)
openvdb::v12_1::ax::PointExecutable::CLI::PointExecutable
friend class PointExecutable
Definition PointExecutable.h:162
openvdb::v12_1::ax::PointExecutable::CLI::create
static CLI create(size_t argc, const char *argv[], bool *used=nullptr)
openvdb::v12_1::ax::PointExecutable::CLI::~CLI
~CLI()
openvdb::v12_1::ax::PointExecutable::Settings
Definition PointExecutable.h:148
openvdb::v12_1::ax::ast::Tree
A Tree is the highest concrete (non-abstract) node in the entire AX AST hierarchy....
Definition AST.h:563
OPENVDB_VERSION_NAME
#define OPENVDB_VERSION_NAME
The version namespace name for this library version.
Definition version.h.in:121
OPENVDB_USE_VERSION_NAMESPACE
#define OPENVDB_USE_VERSION_NAMESPACE
Definition version.h.in:218