Merge pull request #989 from danrbailey/prepare_v7_2_3

Prepare v7.2.3

CHANGES

@@ -1,6 +1,12 @@
 OpenVDB Version History
 =======================
 
+Version 7.2.3 - March 16, 2021
+
+    Bug fixes:
+    - Use copy-by-reference for the operator in a DynamicNodeManager to fix a
+      performance regression.
+
 Version 7.2.2 - February 4, 2021
 
     Bug fixes:

doc/CMakeLists.txt

@@ -51,7 +51,7 @@ set(DOXY_FILES
   doc/python.txt)
 
 set(DOXYGEN_PROJECT_NAME "OpenVDB")
-set(DOXYGEN_PROJECT_NUMBER "7.2.2")
+set(DOXYGEN_PROJECT_NUMBER "7.2.3")
 set(DOXYGEN_PROJECT_BRIEF "")
 set(DOXYGEN_FILE_PATTERNS "*.h") # headers only
 set(DOXYGEN_IMAGE_PATH "doc/img")

doc/changes.txt

@@ -2,6 +2,16 @@
 
 @page changes Release Notes
 
+@htmlonly <a name="v7_2_3_changes"></a>@endhtmlonly
+@par
+<B>Version 7.2.3</B> - <I><March 16, 2021</I>
+
+@par
+Bug fixes:
+- Use copy-by-reference for the operator in a DynamicNodeManager to fix a
+  performance regression.
+
+
 @htmlonly <a name="v7_2_2_changes"></a>@endhtmlonly
 @par
 <B>Version 7.2.2</B> - <I>February 4, 2021</I>

openvdb/openvdb/tree/NodeManager.h

@@ -267,7 +267,7 @@ class NodeList
     template<typename NodeOp>
     void foreach(const NodeOp& op, bool threaded = true, size_t grainSize=1)
     {
-        NodeTransformer<NodeOp> transform(op);
+        NodeTransformerCopy<NodeOp> transform(op); // always deep-copies the op
         transform.run(this->nodeRange(grainSize), threaded);
     }
 
@@ -278,7 +278,8 @@ class NodeList
         transform.run(this->nodeRange(grainSize), threaded);
     }
 
-    // identical to foreach except the operator() method has a node index
+    // identical to foreach except the operator() method has a node index and
+    // the operator is referenced instead of copied in NodeTransformer
     template<typename NodeOp>
     void foreachWithIndex(const NodeOp& op, bool threaded = true, size_t grainSize=1)
     {
@@ -312,6 +313,26 @@ class NodeList
         static void eval(T& node, typename NodeRange::Iterator& iter) { node(*iter, iter.pos()); }
     };
 
+    // Private struct of NodeList that performs parallel_for
+    template<typename NodeOp, typename OpT = OpWithoutIndex>
+    struct NodeTransformerCopy
+    {
+        NodeTransformerCopy(const NodeOp& nodeOp) : mNodeOp(nodeOp)
+        {
+        }
+        void run(const NodeRange& range, bool threaded = true)
+        {
+            threaded ? tbb::parallel_for(range, *this) : (*this)(range);
+        }
+        void operator()(const NodeRange& range) const
+        {
+            for (typename NodeRange::Iterator it = range.begin(); it; ++it) {
+                OpT::template eval(mNodeOp, it);
+            }
+        }
+        const NodeOp mNodeOp;
+    };// NodeList::NodeTransformerCopy
+
     // Private struct of NodeList that performs parallel_for
     template<typename NodeOp, typename OpT = OpWithoutIndex>
     struct NodeTransformer
@@ -329,7 +350,7 @@ class NodeList
                 OpT::template eval(mNodeOp, it);
             }
         }
-        const NodeOp mNodeOp;
+        const NodeOp& mNodeOp;
     };// NodeList::NodeTransformer
 
     // Private struct of NodeList that performs parallel_reduce
@@ -886,6 +907,13 @@ class DynamicNodeManager
     /// children of this node should be processed, false indicating the
     /// early-exit termination should occur.
     ///
+    /// @note Unlike the NodeManager, the foreach() method of the
+    /// DynamicNodeManager uses copy-by-reference for the user-supplied functor.
+    /// This can be an issue when using a shared Accessor or shared Sampler in
+    /// the operator as they are not inherently thread-safe. For these use
+    /// cases, it is recommended to create the Accessor or Sampler in the
+    /// operator execution itself.
+    ///
     /// @par Example:
     /// @code
     /// // Functor to densify the first child node in a linear array. Note

openvdb/openvdb/version.h

@@ -50,7 +50,7 @@
 // Library major, minor and patch version numbers
 #define OPENVDB_LIBRARY_MAJOR_VERSION_NUMBER 7
 #define OPENVDB_LIBRARY_MINOR_VERSION_NUMBER 2
-#define OPENVDB_LIBRARY_PATCH_VERSION_NUMBER 2
+#define OPENVDB_LIBRARY_PATCH_VERSION_NUMBER 3
 
 // If OPENVDB_ABI_VERSION_NUMBER is already defined (e.g., via -DOPENVDB_ABI_VERSION_NUMBER=N)
 // use that ABI version.  Otherwise, use this library version's default ABI.