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Make orientations_ a local variable, for thread-safety 

In small dimension, small_vector won't allocate, and in large dimension,
orientations are more costly than a single allocation.
This commit is contained in:
Marc Glisse 2020-04-18 13:42:45 +02:00
parent e6e1c8b557
commit 666808c2ea
1 changed files with 3 additions and 5 deletions
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8
Triangulation/include/CGAL/Triangulation.h
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@ -27,6 +27,7 @@
#include <CGAL/Default.h>
#include <CGAL/Random.h>
#include <boost/container/small_vector.hpp>
#include <boost/iterator/filter_iterator.hpp>
#include <CGAL/boost/iterator/transform_iterator.hpp>
@ -187,7 +188,6 @@ protected: // DATA MEMBERS
Triangulation_ds tds_;
const Geom_traits kernel_;
Vertex_handle infinity_;
mutable std::vector<Oriented_side> orientations_;
mutable boost::optional<Flat_orientation_d> flat_orientation_;
// The user can specify a Flat_orientation_d object to be used for
// orienting simplices of a specific dimension
@ -317,8 +317,6 @@ public:
++infinity_;
++inf2;
}
// A full_cell has at most 1 + maximal_dimension() facets:
orientations_.resize(1 + maximal_dimension());
// Our coaffine orientation predicates HAS state member variables
reset_flat_orientation();
}
@ -613,8 +611,6 @@ public:
{
tds_.clear();
infinity_ = tds().insert_increase_dimension();
// A full_cell has at most 1 + maximal_dimension() facets:
orientations_.resize(1 + maximal_dimension());
// Our coaffine orientation predicates HAS state member variables
reset_flat_orientation();
#ifdef CGAL_TRIANGULATION_STATISTICS
@ -1090,6 +1086,8 @@ Triangulation<TT, TDS>
// of one |orientation| predicate
Full_cell_handle previous = Full_cell_handle();
bool full_cell_not_found = true;
// A full_cell has at most 1 + maximal_dimension() facets:
boost::container::small_vector<signed char, 8> orientations_ (1 + maximal_dimension());
while(full_cell_not_found) // we walk until we locate the query point |p|
{
#ifdef CGAL_TRIANGULATION_STATISTICS