CGAL 5.6 - STL Extensions for CGAL
CGAL::Spatial_lock_grid_3< Grid_lock_tag > Class Template Reference

#include <CGAL/Spatial_lock_grid_3.h>


The class Spatial_lock_grid_3 allows to lock points with coordinates (x, y, z) in a 3D grid.

The point type is called P3 here. P3 must provide x(), y(), and z() functions, returning the respective point coordinates as numbers whose type is a model of the concept of RealEmbeddable.

It is a model of SurjectiveLockDataStructure, with T being P3 and S being the function that maps a point to the cell of the 3D grid containing this point.

For example, it can be used by concurrent algorithms to lock simplices.

Template Parameters
Grid_lock_tagallows to choose the locking strategy used by the structure. The following tags are available:
  • Tag_non_blocking is non-blocking (i.e. try_lock will always return immediately) and uses atomics to perform lock operations.
  • Tag_priority_blocking provides both non-blocking and partially-blocking try_lock versions. The partially-blocking version will block (spin) if the thread owning the lock has a lower "ID" (each thread is given an arbitrary ID) or return immediately otherwise. It uses atomics to perform lock operations.
Is Model Of:


 Spatial_lock_grid_3 (const Bbox_3 &bbox, int num_grid_cells_per_axis)
 Constructs the lock grid of size bbox, with num_grid_cells_per_axis cells per axis. More...


void set_bbox (const CGAL::Bbox_3 &bbox)
 Sets the bounding box of the domain.

Constructor & Destructor Documentation

◆ Spatial_lock_grid_3()

template<typename Grid_lock_tag >
CGAL::Spatial_lock_grid_3< Grid_lock_tag >::Spatial_lock_grid_3 ( const Bbox_3 bbox,
int  num_grid_cells_per_axis 

Constructs the lock grid of size bbox, with num_grid_cells_per_axis cells per axis.