[#14696] Inconsistency in rescuability of "return" — Charles Oliver Nutter <charles.nutter@...>

Why can you not rescue return, break, etc when they are within

21 messages 2008/01/02
[#14699] Re: Inconsistency in rescuability of "return" — Gary Wright <gwtmp01@...> 2008/01/02

[#14738] Enumerable#zip Needs Love — James Gray <james@...>

The community has been building a Ruby 1.9 compatibility tip list on

15 messages 2008/01/03
[#14755] Re: Enumerable#zip Needs Love — Martin Duerst <duerst@...> 2008/01/04

Hello James,

[#14772] Manual Memory Management — Pramukta Kumar <prak@...>

I was thinking it would be nice to be able to free large objects at

36 messages 2008/01/04
[#14788] Re: Manual Memory Management — Marcin Raczkowski <mailing.mr@...> 2008/01/05

I would only like to add that RMgick for example provides free method to

[#14824] Re: Manual Memory Management — MenTaLguY <mental@...> 2008/01/07

On Sat, 5 Jan 2008 15:49:30 +0900, Marcin Raczkowski <mailing.mr@gmail.com> wrote:

[#14825] Re: Manual Memory Management — "Evan Weaver" <evan@...> 2008/01/07

Python supports 'del reference', which decrements the reference

[#14838] Re: Manual Memory Management — Marcin Raczkowski <mailing.mr@...> 2008/01/08

Evan Weaver wrote:

[#14911] Draft of some pages about encoding in Ruby 1.9 — Dave Thomas <dave@...>

Folks:

24 messages 2008/01/10

[#14976] nil encoding as synonym for binary encoding — David Flanagan <david@...>

The following just appeared in the ChangeLog

37 messages 2008/01/11
[#14977] Re: nil encoding as synonym for binary encoding — Yukihiro Matsumoto <matz@...> 2008/01/11

Hi,

[#14978] Re: nil encoding as synonym for binary encoding — Dave Thomas <dave@...> 2008/01/11

[#14979] Re: nil encoding as synonym for binary encoding — David Flanagan <david@...> 2008/01/11

Dave Thomas wrote:

[#14993] Re: nil encoding as synonym for binary encoding — Dave Thomas <dave@...> 2008/01/11

[#14980] Re: nil encoding as synonym for binary encoding — Gary Wright <gwtmp01@...> 2008/01/11

[#14981] Re: nil encoding as synonym for binary encoding — Yukihiro Matsumoto <matz@...> 2008/01/11

Hi,

[#14995] Re: nil encoding as synonym for binary encoding — David Flanagan <david@...> 2008/01/11

Yukihiro Matsumoto writes:

[#15050] how to "borrow" the RDoc::RubyParser and HTMLGenerator — Phlip <phlip2005@...>

Core Rubies:

17 messages 2008/01/13
[#15060] Re: how to "borrow" the RDoc::RubyParser and HTMLGenerator — Eric Hodel <drbrain@...7.net> 2008/01/14

On Jan 13, 2008, at 08:54 AM, Phlip wrote:

[#15062] Re: how to "borrow" the RDoc::RubyParser and HTMLGenerator — Phlip <phlip2005@...> 2008/01/14

Eric Hodel wrote:

[#15073] Re: how to "borrow" the RDoc::RubyParser and HTMLGenerator — Eric Hodel <drbrain@...7.net> 2008/01/14

On Jan 13, 2008, at 20:35 PM, Phlip wrote:

[#15185] Friendlier methods to compare two Time objects — "Jim Cropcho" <jim.cropcho@...>

Hello,

10 messages 2008/01/22

[#15194] Can large scale projects be successful implemented around a dynamic programming language? — Jordi <mumismo@...>

A good article I have found (may have been linked by slashdot, don't know)

8 messages 2008/01/24

[#15248] Symbol#empty? ? — "David A. Black" <dblack@...>

Hi --

24 messages 2008/01/28
[#15250] Re: Symbol#empty? ? — Yukihiro Matsumoto <matz@...> 2008/01/28

Hi,

Re: Fibers clear thread-specific data?

From: MenTaLguY <mental@...>
Date: 2008-01-09 22:55:11 UTC
List: ruby-core #14908
On Tue, 2008-01-08 at 11:12 +0900, Tony Arcieri wrote:
> Interesting.  Can you give an example of when that would occur?  I'm
> having trouble imagining what it would be.

Anything using thread-locals to introduce dynamic "context"; for
example, "current transaction":

 def transaction
   transactions = ( Thread.current[:transactions] ||= [] )
   transaction = Transaction.new(transactions.last)
   transactions.push transaction
   ok = false
   begin
     result = yield
     ok = true
     result
   ensure
     transactions.pop
     if ok
       transaction.commit
     else
       transaction.rollback
     end
   end
 end

Here, a thread-local is used to track the current nested transaction and
its ancestors for the current thread of control.  Since fibers
correspond to "threads of control", each fiber is going to want its own
set of transactions.

> This hash may very well hold onto the last reference to the data
> structures I'm trying to store, so it'd be a pity if they got garbage
> collected... 

The last non-weak reference should be from the fiber's Thread.current[]
map, which goes away when the fiber is destroyed.  The data structures
should go away at that time too.

> If I use a Hash, shouldn't that be thread safe?

***__NO__***.  Unless a data structure is explicitly designed for
concurrent access (e.g. Queue), external synchronization with mutating
threads should be used.  Ruby 1.8 and 1.9 won't usually punish you, but
other Ruby implementations will.

-mental

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