Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]

Groups > comp.os.vms > #59163

Re: Pointless Nostalgia: System Service Dispatching

From moroney@world.std.spaamtrap.com (Michael Moroney)
Newsgroups comp.os.vms
Subject Re: Pointless Nostalgia: System Service Dispatching
Date 2016-06-30 16:53 +0000
Organization The World : www.TheWorld.com : Since 1989
Message-ID <nl3ipt$cs$2@pcls7.std.com> (permalink)
References <d52289cd-00cc-4356-a3bd-03b8c574c356@googlegroups.com> <nl0br9$5q7$1@Iltempo.Update.UU.SE> <11185428-ecac-4acc-814e-b3a1063a4bf4@googlegroups.com> <nl3491$rou$1@Iltempo.Update.UU.SE>

Show all headers | View raw

Johnny Billquist <bqt@softjar.se> writes:

>On 2016-06-30 01:05, lawrencedo99@gmail.com wrote:
>> On Wednesday, June 29, 2016 at 11:36:10 PM UTC+12, Johnny Billquist wrote:
>>> Consider a $QIOW for example. If you get an AST, you do not want the $QIOW
>>> to be reexecuted.
>>
>> That'冱 not a problem, because there is no actual $QIOW system call.

>There isn't? Did I place the $ on the wrong side or something now? Or 
>what are you suggesting?

$QIOW (and most $xxxW services which also have a corresponding $xxx service)
are implemented as a $QIO followed immediately by a $SYNCH of the specified
event flag/IOSB pair.  I believe there is a stub routine that makes both 
calls.

I believe only $HIBER can potentially be re-executed.  It does (at least on 
VAX) some funky stack manipulation to place a call to the internal routine
back on the stack rather than the following instruction.  The called
routine determines whether to actually hibernate based on internal states.

Back to comp.os.vms | Previous | Next — Previous in thread | Next in thread | Find similar | Unroll thread

Thread

Pointless Nostalgia: System Service Dispatching lawrencedo99@gmail.com - 2016-06-29 02:53 -0700
  Re: Pointless Nostalgia: System Service Dispatching Johnny Billquist <bqt@softjar.se> - 2016-06-29 13:36 +0200
    Re: Pointless Nostalgia: System Service Dispatching lawrencedo99@gmail.com - 2016-06-29 16:05 -0700
      Re: Pointless Nostalgia: System Service Dispatching Johnny Billquist <bqt@softjar.se> - 2016-06-30 14:45 +0200
        Re: Pointless Nostalgia: System Service Dispatching moroney@world.std.spaamtrap.com (Michael Moroney) - 2016-06-30 16:53 +0000
          Re: Pointless Nostalgia: System Service Dispatching lawrencedo99@gmail.com - 2016-06-30 15:32 -0700
        Re: Pointless Nostalgia: System Service Dispatching   VAXman-  @SendSpamHere.ORG - 2016-06-30 16:55 +0000
          Re: Pointless Nostalgia: System Service Dispatching Johnny Billquist <bqt@softjar.se> - 2016-06-30 21:13 +0200
            Re: Pointless Nostalgia: System Service Dispatching   VAXman-  @SendSpamHere.ORG - 2016-06-30 19:52 +0000
              Re: Pointless Nostalgia: System Service Dispatching Johnny Billquist <bqt@softjar.se> - 2016-07-01 14:11 +0200
              Re: Pointless Nostalgia: System Service Dispatching   VAXman-  @SendSpamHere.ORG - 2016-07-01 12:46 +0000
                Re: Pointless Nostalgia: System Service Dispatching Johnny Billquist <bqt@softjar.se> - 2016-07-01 17:40 +0200
                Re: Pointless Nostalgia: System Service Dispatching   VAXman-  @SendSpamHere.ORG - 2016-07-01 16:59 +0000
                Re: Pointless Nostalgia: System Service Dispatching Johnny Billquist <bqt@softjar.se> - 2016-07-01 19:45 +0200
                Re: Pointless Nostalgia: System Service Dispatching   VAXman-  @SendSpamHere.ORG - 2016-07-01 20:01 +0000
                Re: Pointless Nostalgia: System Service Dispatching Johnny Billquist <bqt@softjar.se> - 2016-07-04 12:35 +0200
                Re: Pointless Nostalgia: System Service Dispatching lawrencedo99@gmail.com - 2016-07-01 15:18 -0700
                Re: Pointless Nostalgia: System Service Dispatching   VAXman-  @SendSpamHere.ORG - 2016-07-02 20:02 +0000
                Re: Pointless Nostalgia: System Service Dispatching lawrencedo99@gmail.com - 2016-07-03 14:10 -0700
                Re: Pointless Nostalgia: System Service Dispatching lawrencedo99@gmail.com - 2016-07-04 14:56 -0700
                Re: Pointless Nostalgia: System Service Dispatching   VAXman-  @SendSpamHere.ORG - 2016-07-04 13:25 +0000
                Re: Pointless Nostalgia: System Service Dispatching   VAXman-  @SendSpamHere.ORG - 2016-07-05 00:46 +0000
                Re: Pointless Nostalgia: System Service Dispatching David Froble <davef@tsoft-inc.com> - 2016-07-05 08:43 -0400
                Re: Pointless Nostalgia: System Service Dispatching lawrencedo99@gmail.com - 2016-07-05 15:40 -0700
                Re: Pointless Nostalgia: System Service Dispatching Paul Sture <nospam@sture.ch> - 2016-07-06 07:33 +0200
                Re: Pointless Nostalgia: System Service Dispatching   VAXman-  @SendSpamHere.ORG - 2016-07-06 00:08 +0000
                Re: Pointless Nostalgia: System Service Dispatching David Froble <davef@tsoft-inc.com> - 2016-07-05 22:57 -0400
                Re: Pointless Nostalgia: System Service Dispatching   VAXman-  @SendSpamHere.ORG - 2016-07-06 10:43 +0000
                Re: Pointless Nostalgia: System Service Dispatching Paul Sture <nospam@sture.ch> - 2016-07-05 12:30 +0200
                Re: Pointless Nostalgia: System Service Dispatching   VAXman-  @SendSpamHere.ORG - 2016-07-05 13:00 +0000
                Re: Pointless Nostalgia: System Service Dispatching Simon Clubley <clubley@remove_me.eisner.decus.org-Earth.UFP> - 2016-07-06 15:12 +0000
                Re: Pointless Nostalgia: System Service Dispatching Paul Sture <nospam@sture.ch> - 2016-07-06 21:50 +0200
                [OT] Real Genius, was: Re: Pointless Nostalgia: System Service Dispatching Simon Clubley <clubley@remove_me.eisner.decus.org-Earth.UFP> - 2016-07-07 19:55 +0000
                Re: [OT] Real Genius, was: Re: Pointless Nostalgia: System Service Dispatching Paul Sture <nospam@sture.ch> - 2016-07-07 22:27 +0200
                Re: Pointless Nostalgia: System Service Dispatching   VAXman-  @SendSpamHere.ORG - 2016-07-06 15:42 +0000

csiph-web