(j3.2006) (SC22WG5.5422) Preliminary result of the WG5 straw ballot on N2040

[Van Snyder]

John wrote:

Please answer the following question "Is N2040 ready for forwarding to
SC22 as the DTS?" in one of these ways.

1) Yes.
2) Yes, but I recommend the following changes.
3) No, for the following reasons.
4) Abstain.

My vote is, relucatantly

3) No, for the following reasons

I am concerned by Robert Corbett's comments.

I don't quite know what to do because I'm not expert in the area of 
synchronization mechanisms.  One concern that especially troubles me is 
Robert's observation that there is no specification that locks held by a 
stalled image be unlocked when the image resumes execution, and critical 
sections in which stalled images are executing when they stalled be 
considered to be completed.  I don't know what other "gotchas" lurk in 
similar areas.

My contacts on the Ada committee assure me that exception handling can 
be done with very low overhead, but I have not asked them about 
interactions between exception handling, locks, critical sections, and 
synchronization.

I'm tempted to abstain, but the lack of description of the interaction 
of resuming a stalled image with synchronization, locks, and critical 
sections leads me to vote no.

Van

John Reid wrote:
> WG5,
>
> Here is a new version with Bob Corbett's vote included.
>
> John.
>
> John Reid wrote:
>> WG5,
>>
>> Here is the preliminary result of the WG5 straw ballot on N2040. Several
>> people that usually voted have not done so this time. If any of you do
>> so very soon, I will include your vote.
>>
>> I have not decided what the result should be. There seem to be two
>> alternatives:
>>
>> 1. Make a few more changes, checked by the email group, to address the
>> comments and send the result to SC22.
>>
>> 2. Ask J3 to make a new version at its Feb. meeting and have a fresh
>> informal WG5 ballot on the result.
>>
>> I favour the first alternative. I think the draft would be good enough
>> for a first SC22 ballot. We need to know ASAP if any major changes are
>> needed.
>>
>> Please tell me what you think.
>>
>> John.
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