ASE2 CARD CATALOG ENTRY

Instructions:

ASSET OVERVIEW

UNIT NAME

ESM

VERSION
22-JAN-92
REVIEW CODE
C1 1.0 A
INET ADDRESS
librarian@source.asset.com
AUTHOR
Douglas W. Jones
University of Iowa
RIGHTS
Approved for public release; distribution unlimited
COPYRIGHT
1992 Douglas W. Jones
DATE CREATED
22 January 1992
DATE RELEASED
11 December 1993
DATE LAST UPDATED
11 December 1993
LOCATION
PAL
ENVIRONMENT
LIMITATIONS
CERTIFICATION 
Ada System Certifier_1 1.0
Date/Time of Processing: Wednesday 25 May       1994 05:05:12Pm
Overall Assessment of System: OK
Classification of System: A
Basis of Classification --
    Syntax Errors                               PASS
    Completeness                                PASS
    Independence from External Libraries        PASS
    Independence from a Specific Ada Compiler   PASS

Number of ...
  Files               1
  Library Units       2
  Lines             503
  Statements        259
  Comments          126

CLASSIFICATION

KEYWORD
Event Set Manager
Manager, Event Set
Activity Manager
Manager, Activity
Modeling
Simulation
ESM
INDEX
Jones, Douglas W.
Univ of Iowa
DEPENDENCIES
None
SEE ALSO
SHORT DESCRIPTION
Components for managing pending events for a simulation model
TAXONOMY


Software Components
    Event Set Manager

FILE LISTING

FILE SPECS
Click here to enter Asset Directory/transfer Asset File(s): ../../ase02_02/comps/esm
DIRECTORY DISPLAY
Follow path to see directory

ABSTRACT

Event Set Manager Package

This package allows for managing pending events for a simulation model. There are functions to get a new event (either from the free list or to allocate a new event), to free an event, to schedule a future event to enter the event set, and to get the next event from the event set. Event records are used to hold all information about a pending event in a simulation model, including the time of the event, where it is to happen, and what will happen. Event records are always dynamically allocated and manipulated with pointers. In many simulation models, their number will vary dynamically during the life of the model. All aspects of event-set structure are hidden; conceptually, the event set may be viewed as a linked list ordered by the time at which events are scheduled to happen. For the sake of efficiency, a more complex data structure, called a splay tree, is used.

The generic pending event set manager is a transliteration of a Pascal version Doug Jones wrote some years ago, properly packaged in Ada style to enforce information hiding. The same Pascal source has been transliterated into C by David Brower, and his C code was used as the basis for a C++ version that is now in the GNU C++ standard distribution. The Pascal code has been bug free for a number of years now, and has been widely used; the C code had only one bug in its first release, and it has been bug free for years.

REVISION HISTORY 

22 January 1992   Douglas W. Jones   Initial release to ASSET
11 December 1993  ASSET              Initial release to the PAL

RELEASE NOTICE 

This prologue must be included in all copies of this software.
Restrictions on use or distribution:  NONE

DISCLAIMER 

	This software and its documentation are provided "AS IS" and
without any expressed or implied warranties whatsoever.  No warranties
as to performance, merchantability, or fitness for a particular
purpose exist.
	The user is advised to test the software thoroughly before
relying on it.  The user must assume the entire risk and liability of
using this software.  In no event shall any person or organization of
people be held responsible for any direct, indirect, consequential or
inconsequential damages or lost profits.








ASE CARD CATALOG ENTRY NAVIGATION




Powered by the Generic Web-Based Reuse Library (GWRL)