Dave m wrote:
There's nothing in the language that precludes a 5.0005-style threading implementation.
So that print "$x", currently does modify $x to be
a string, that might safely be called an implementation detail that wouldn't need to be kept for compatibility reasons.
I think it's a shame that they gave up on the 5.0005 style threading. The linux kernel didn't become SMP safe or capable overnight. It started out with no SMP, and for a long time, lived with the 'big lock model', where user-land code could be multi-threaded, but by-and-large, the kernel was not. Going from 2.0->2.2-2.4 were long steps...and it took alot of developer education to go from 1 big lock to many smaller locks, and in many cases, non-locking models to reduce bus contention and going higher ordered algorithms to ones that approach O(1).
As near as I can tell, it's an ongoing process. Certainly a redesign of the language could make the process easier, but I have no idea if there was a brick wall, or if some people were too risk aversive to live with something that was in constant evolution.
From an end user-perspective, I never heard about user-level programs needing complete rewrites due to language changes, but at the driver level things were less stable -- not exactly chaotic, but certainly requiring ongoing work.
Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
Read Where should I post X? if you're not absolutely sure you're posting in the right place.
Please read these before you post! —
Posts may use any of the Perl Monks Approved HTML tags:
You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
- a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
Link using PerlMonks shortcuts! What shortcuts can I use for linking?
See Writeup Formatting Tips and other pages linked from there for more info.
| & || & |
| < || < |
| > || > |
| [ || [ |
| ] || ] ||