ruby-dev

ふと、気がついたのですが、

% ruby -rweakref -e '
s = []
30.times {
  a = "a"
  b = WeakRef.new(a)
  s << b
  print a.id, " "
  GC.start
  p s.map {|o| o.weakref_alive?}
}'
67647366 [true]
68138524 [true, true]
68138374 [false, true, true]
68137824 [false, false, true, true]
68137904 [false, false, false, true, true]
69040014 [false, false, false, false, true, true]
69039764 [false, false, false, false, false, true, true]
69039494 [false, false, false, false, false, false, true, true]
69039614 [false, false, false, false, false, false, false, true, true]
69039754 [false, false, false, false, false, false, false, false, true, true]
69039584 [false, false, false, false, false, false, false, false, false, true, true]
70677268 [false, false, false, false, false, false, false, false, false, false, true, true]
70677028 [false, false, false, false, false, false, false, false, false, false, false, true, true]
70676778 [false, false, false, false, false, false, false, false, false, false, false, false, true, true]
70676818 [false, false, false, false, false, false, false, false, false, false, false, false, false, true, true]
70676938 [false, false, false, false, false, false, false, false, false, false, false, false, false, false, true, true]
70676808 [false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, true, true]
70676738 [false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, true, true]
70676778 [false, false, false, false, false, false, false, false, false, false, false, false, false, true, false, false, false, true, true]
70676768 [false, false, false, false, false, false, false, false, false, false, false, false, false, true, false, false, false, false, true, true]
70676688 [false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, true, true]
...

ということを試すと、70676778 が 2回出てきて、それにともなって weakref
が復活する(weakref_alive? が true -> false -> true と変化する)ことがあ
るようなんですが、これはそういうものなんでしょうか。
-- 
[田中 哲][たなか あきら][Tanaka Akira]
「ふえろ! わかめちゃん作戦です$(C⊇」(Little Worker, 桂遊生丸)

Thread

Prev Next

In This Thread

Prev Next

[#18423] LIBRUBYARG (Re: [ruby-list:36055] Re: [ANN] ruby-sumo) — nobu.nakada@...

[#18427] shrink memory — nagai@...

[#18440] racc segv revisited — "Akinori MUSHA" <knu@...>

[#18458] yield from loaded file — Minero Aoki <aamine@...>

[#18463] EWOULDBLOCK at IO#close/IO#flush — nobu.nakada@...

[#18465] warning for outer local variable assignment by block parameter — Tanaka Akira <akr@...17n.org>

[#18471] How about String#clear? — YANAGAWA Kazuhisa <kjana@...4lab.to>

[#18472] weakref — Tanaka Akira <akr@...17n.org>

[#18473] Compiling using oldnames on mswin/mingw/bccwin — nobu.nakada@...

[#18482] mem leak? — WATANABE Tetsuya <tetsu@...>

[#18494] PStoreのFile.copyの中でErrno::EBADF — Kazuhiro NISHIYAMA <zn@...>

[#18506] How to raise LocalJumpError with next and redo? — Tanaka Akira <akr@...17n.org>

[#18514] Segmentaion fault of miniruby — "U.Nakamura" <usa@...>

[#18525] Forward: darwin shared library patch — matz@... (Yukihiro Matsumoto)

[#18526] Forward: Patch for MacOS X dln.c — matz@... (Yukihiro Matsumoto)

[#18534] void value expression in conditional — nobu.nakada@...

[#18535] eliminate useless NODE_BEGIN — nobu.nakada@...

[#18537] symbol literal with non-alphanumeric — nobu.nakada@...

[#18540] ruby 1.6 core dump — "Akinori MUSHA" <knu@...>

[#18542] ruby.m4 — Kenta MURATA <muraken2@...>

[#18546] [PATCH] README.EXT 英語直す — Simon Cozens <simon@...>

[#18558] ruby version — 小西 弘将 <konishih@...6.so-net.ne.jp>

[#18569] instruby.rb: dll install — WATANABE Tetsuya <tetsu@...>

[#18572] avoid substituting $(s) in a template of LIBPATHFLAG — Ryo HAYASAKA <ryoh@...>

[#18581] [PATCH] ' '.dup.rstrip.gsub(/a/, '').split(//) causes SEGV — Minero Aoki <aamine@...>

[#18582] embedded ruby interpreter friendly patch — Tietew <tietew-ml-ruby-dev@...>

[#18583] Re: [ruby-cvs] ruby/djgpp, ruby/ext, ruby, ruby/lib: * djgpp/*: sync with the latest. — nobu.nakada@...

[#18584] Re: [ruby-cvs] ruby, ruby/ext, ruby/lib: ext/extmk.rb(78) : The unnecessary error when installing by bccwin32 is controlled. — WATANABE Hirofumi <eban@...>

[#18598] Re: Access to Windoze Registry? — kjana@...4lab.to (YANAGAWA Kazuhisa)

[#18602] interrupt while initializaion — nobu.nakada@...

[#18606] private_method_defined? — Shin-ichiro HARA <sinara@...>

[ruby-dev:18472] weakref

Thread

In This Thread

[#18558] ruby version — 小西弘将 <konishih@...6.so-net.ne.jp>