 Concept Global Descriptor
 Concept Global DescriptorA global descriptor is an object that represents an entity that is owned by some process and may reside in an address space not accessible to the currently-executing process. The global descriptor consists of two parts: the owner of the entity, which is the identifier of that process in which the entity resides, and a local descriptor, that uniquely identifies the entity with the address space of the owner.
| Process ID type | process_id_type | Determined by the process group associated with type X. | 
| Local descriptor type | local_type | Determined by the data structure the descriptor accesses. Must model Equality Comparable and Copy Constructible. | 
| Name | Expression | Type | Semantics | 
|---|---|---|---|
| Owner | owner(x) | process_id_type | Returns the owner of x. | 
| Local descriptor | local(x) | local_type | Returns the local descriptor uniquely identifying x. | 
Copyright (C) 2005 The Trustees of Indiana University.
Authors: Douglas Gregor and Andrew Lumsdaine