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recycle the constraints indices

This commit is contained in:
Laurent Rineau 2025-01-24 19:36:57 +01:00
parent e1e94a1304
commit 9fa067cb4d
1 changed files with 15 additions and 6 deletions
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15
Triangulation_2/include/CGAL/Triangulation_2/internal/Polyline_constraint_hierarchy_2.h
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@ -22,6 +22,7 @@
#include <set>
#include <list>
#include <array>
#include <queue>
#include <boost/stl_interfaces/iterator_interface.hpp>
@ -472,6 +473,7 @@ private:
Compare comp;
Sc_to_c_map sc_to_c_map;
std::queue<size_type> free_ids;
Constraints_set constraints_set;
} priv;
public:
@ -587,13 +589,20 @@ private:
//
// then the uses of `constraints_set`
Constraint_id create_new_constraint() {
auto id{number_of_constraints() == 0 ? 0 : priv.constraints_set.rbegin()->index() + 1};
size_type id; // uninitialized
if(priv.free_ids.empty()) {
id = priv.constraints_set.size();
} else {
id = priv.free_ids.front();
priv.free_ids.pop();
}
Constraint_id cid{new Vertex_list_with_info{this}, id};
priv.constraints_set.insert(cid);
return cid;
}
void erase_constraint(Constraint_id cid) {
priv.free_ids.push(cid.index());
priv.constraints_set.erase(cid);
cid.destroy();
}
@ -719,6 +728,7 @@ swap(Polyline_constraint_hierarchy_2& ch)
{
using std::swap;
swap(priv.comp, ch.priv.comp);
priv.free_ids.swap(ch.priv.free_ids);
priv.constraints_set.swap(ch.priv.constraints_set);
priv.sc_to_c_map.swap(ch.priv.sc_to_c_map);
}
@ -1164,8 +1174,7 @@ clear()
cl_ptr->clear();
delete cl_ptr;
}
priv.sc_to_c_map.clear();
priv.constraints_set.clear();
priv = Priv(priv.comp);
}