mss@cbnews.ATT.COM (Mark S. Shaw) (08/26/89)
I have heard that there is a xinu simulator available which runs as a single UNIX process. I would appreciate information on how it can be obtained. Thanks in advance. Mark Shaw mss@cblph.att.com att!cblph!mss
libes@cme.nbs.gov (Don Libes) (08/26/89)
In article <9199@cbnews.ATT.COM> mss@cbnews.ATT.COM (Mark S. Shaw) writes: >I have heard that there is a xinu simulator available which runs as a single >UNIX process. I would appreciate information on how it can be obtained. This appeared in the July/August 1987 ;login: as "Multiple Programs in One UNIX Process". It is available by anonymous ftp from durer.cme.nist.gov as xinu.shar.Z Xinu/UNIX may not be everything you want. It cheats as much as possible. For example, when programming with it, you use the regular UNIX device drivers, cc, ld, C startup routines, etc. Bear in mind that it wasn't done as an experiment or to show anything - rather, it was done because it provided us with threads (i.e. lightweight processes). Nonetheless, the system demonstrates the elegance of Xinu and what it is all about. Doug Comer told me that some of his students also wrote one which they called "Concurrent C". It uses a second process to handle I/O. This avoids the restriction that calling a UNIX device driver blocks the entire set of Xinu processes. (Our application wasn't concerned with this.) The paper I referred to earlier goes into more detail on all of this. Don Libes libes@cme.nist.gov ...!uunet!cme-durer!libes
krr@CS.PURDUE.EDU (08/27/89)
The system done at Purdue which Don Libes mentioned is called ConcurrenC,
which is our port of Xinu within a single Unix process. We kept Xinu
functionality in tact, with some name changes of system calls due to conflicts
with Unix systems calls. We also kept Unix semantics and functionality as much
as possible. Unix C library routines are made mutual exclusive, and a
blocking I/O ConcurrenC task does not block other tasks in the system. The
ConcurrenC system includes src for the Xinu/ConcurrenC routines, source for
modified Unix C library routines, and manual pages which list the Xinu name
changes within ConcurrenC, restricted Unix system calls, etc.
The following gives information on how to obtain ConcurrenC. Note that a
copy of your Unix source licence is required.
- Ken Rodemann
Xinu Types and Price List
Target Xinu Host Compiler Media Price Make Check
Machine Version Operating Payable to
System
-------------------------------------------------------------------
LSI (@) 6 (Book I)Cross Compiler 1600 BPI $100 Douglas Comer
Included 9-Track UNIX
4.3BSD UNIX Tar Tape
LSI (@) 7(Book II)Cross Compiler 1600 BPI $200 Douglas Comer
Included 9-Track UNIX
4.3BSD UNIX Tar Tape
_____________________________________________________________________
8086 (%)6 (Book I) Cross Compiler 1600 BPI $100 Douglas Comer
Derived Included 9-Track UNIX
from 4.3BSD UNIX Tar Tape
LSI-11
______________________________________________________________________
Sun3 (%)6 (Book I) Sun Micro- 1600 BPI $100 Shawn Ostermann
Systems C 9-Track UNIX
Sun OS Tar Tape
Sun3 (%)7 (Book II)Sun Micro- 1600 BPI $200 Shawn Ostermann
Systems C 9-Track UNIX
Sun OS Tar Tape
______________________________________________________________________
IBM-PC PC-Xinu Microsoft C 5 1/4 floppy ~ $80 Contact Prentice
MS/DOS Hall
ISBN #0-13-638271-1
IBM-PC (%)6 (Book I) Aztec C 5 1/4 floppy $100 Andy Thomas
______________________________________________________________________
Macint (%)6 (Book I) Aztec C two 3 1/2 floppy $200 Steven Munson
tosh & Macintosh &
512K 7 (Book II) 1600BPI
9-Track UNIX
Tar Tape
Macint (%)6 (Book I) Aztec C two 3 1/2 floppy ~ $80 Contact Prentice
tosh Macintosh Hall
512K ISBN #0-13-638545-1
or
$100 Steven Munson
_________________________________________________________________________
VAX 6 (Book I ) VAX UNIX C 1600 BPI $200 Douglas Comer
& Compiler 9-Track UNIX
7 (Book II) 4.3BSD UNIX Tar Tape
_________________________________________________________________________
VAX (*) ConcurrenC VAX UNIX 1600 BPI $50 Ken Rodemann
Compiler 9-Track UNIX
4.3BSD UNIX Tar Tape
_________________________________________________________________________
(@) Less expensive if purchased from Prentice-Hall.
For Prentice Hall, contact Rob Dewey, (201) 592-2862;
or Mail Order dept. (201) 767-5937.
(%) Prepared by students. These versions are "as is".
(*) Requires UNIX source license. Send a mailing tape.
4.2 BSD UNIX also available.
If you have a UNIX source license, please send a copy
of the signature page; otherwise, we will send you dis-
tributions without UNIX source.
Send your order and check to: Professor Douglas Comer,
Department of Computer Sciences, Purdue University,
West Lafayette, IN 47907.
Information about Xinu is exchanged through electronic mail. To
have your name added to the mailing list, send to xinu-info-
request@purdue.edu. To send mail to the Xinu list, address it to
xinu-info@purdue.edu.