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- .. Copyright (C) 2004-2008 The Trustees of Indiana University.
- Use, modification and distribution is subject to the Boost Software
- License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
- http://www.boost.org/LICENSE_1_0.txt)
- ================================
- |Logo| Concept Global Descriptor
- ================================
- .. contents::
- Description
- -----------
- A 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.
- Refinement of
- -------------
- - `Default Constructible`_
- - Assignable_
- Notation
- --------
- X
- A type that models the Global Descriptor concept.
- x
- Object of type X
- Associated types
- ----------------
- +----------------+--------------------+---------------------------------+
- |Process ID type |``process_id_type`` |Determined by the process group |
- | | |associated with type X. |
- +----------------+--------------------+---------------------------------+
- |Local descriptor|``local_type`` |Determined by the data structure |
- |type | |the descriptor accesses. |
- | | |Must model `Equality Comparable`_|
- | | |and `Copy Constructible`_. |
- +----------------+--------------------+---------------------------------+
- Valid Expressions
- -----------------
- +----------------+---------------------+---------------------+-------------------------------------+
- |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
- .. |Logo| image:: pbgl-logo.png
- :align: middle
- :alt: Parallel BGL
- :target: http://www.osl.iu.edu/research/pbgl
- .. _Assignable: http://www.sgi.com/tech/stl/Assignable.html
- .. _Copy constructible: http://www.sgi.com/tech/stl/CopyConstructible.html
- .. _Default constructible: http://www.sgi.com/tech/stl/DefaultConstructible.html
- .. _Equality comparable: http://www.sgi.com/tech/stl/EqualityComparable.html
|
