[ts-gen] May release

[Richard Pruss]

Hi Bill,

The May 29 release is up and working fine on the Mac.  Without any  
optimization
changes.  test.rb seems to run all the way through without any errors or
hangs.

Sorry about the slow turn around,
Ric

On 30/05/2009, at 11:46 AM, Bill Pippin wrote:

> This post summarizes recent fixes and changes.
>
> The most recent release of the shim has been run against the newest
> release, 894.4, of the IB tws, and includes the following changes
> and bug fixes.
>
> Features/Changes:
>
> (1) Reduced latency for both scripted command input and large  
> messages:
>    Add loop to select'd read to continue select'ing, with zero
>    delay, if: for IB tws socket, buffer was exactly filled; or,
>    for stdin command input, a line was read in.
>
> (2) Command language change:
>    Modify the wait command to accept floating point input, to
>    read that input with microsecond resolution, and to update
>    wait delays at each iteration of the main loop, which,
>    given the approximately 20 millisecond duration of those
>    iterations, means that the minimum non-zero wait delay is
>    now about 0.020 seconds rather than 1 second.
>
>    This feature is provided to allow users to delay otherwise
>    back to back orders, where such delay is evidently required
>    in order to avoid limitations of the IB tws, and yet to spend
>    less time than a full second, which was an unecessarily long
>    delay.
>
>    Uncomfirmed anecdotal evidence indicates that the appropriate
>    delay is on the order of a third or quarter of a second.  This
>    value is surprisingly high, and warrants furthur investigation.
>
> (3) Change to order semantics:
>    Add a simple state machine to the per-order RiskId object
>    to reject invalid transitions --- modify before create,
>    multiple creates, and multiple submits --- and change the
>    rules for computing the order transmit flag for modify so
>    that it reflects the current state, that is, transmit
>    flag off if not yet submitted, and transmit flag on if
>    already submitted, with the effect that modify may be
>    used both before and, given the order still working, after
>    submission.
>
> Bug fixes:
>
> (1) Set line buffering as program default for stdout when the cout
>    option is provided.  For data mode, add bulk option to override
>    this default, instead allowing system default buffering to
>    prevail, and thereby recovering the original behavior of shim
>    prior to this change.  The bulk option is ignored in risk mode.
>    Thanks to Mike Thornton.
>
> (2) Only the first interface in the getaddrinfo() return list was
>    tried for socket connect; now each IF is tried until the first
>    success (thanks to Richard Pruss).  Also add AI_ADDRCONFIG flag
>    to ai_flags attribute so that only IFs of the same type --- v4
>    or v6 --- as the external IF will be included in the list.
>
> (3) Fix serious table component error whereby search loop could hang.
>    Again, thanks to Richard Pruss.
>
>    Note: he still seems to be observing problems for OSX.  I mention
>    this here since the bug fixes already made are significant for
>    Linux users as well, and so other users should consider upgrading
>    in any case.
>
> (4) Fix race whereby order variable binding was extracted from
>    event loop processing, which occurs after event input loop
>    and so possibly following successive order commands, so that
>    order variable binding instead occurs during command
>    parsing, as an attribute grammar action.  This is the orders
>    problem that led to my warning for last Friday's release, and
>    for which the mailing list post by Paul C suggested the problem
>    (thanks, Paul).  This release also includes changes to the
>    exs/risk.rb test script to make it easier to modify and reuse.
>
> Thanks,
>
> Bill
>
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