diff options
| author | Father Chrysostomos <sprout@cpan.org> | 2012-11-14 13:02:48 -0800 |
|---|---|---|
| committer | Father Chrysostomos <sprout@cpan.org> | 2012-11-14 13:10:58 -0800 |
| commit | e3918bb703cafa92e5a8d957a810cafe3334d9a1 (patch) | |
| tree | 0dc55cf37087f45a20d83132e32b1f5fb8feb14d /pp_hot.c | |
| parent | e9cb264cbba0cfffe4b822389c0be43c54755b66 (diff) | |
| download | perl-e3918bb703cafa92e5a8d957a810cafe3334d9a1.tar.gz | |
SVf_IsCOW
As discussed in ticket #114820, instead of using READONLY+FAKE to mark
a copy-on-write string, we should make it a separate flag.
There are many modules in CPAN (and 1 in core, Compress::Raw::Zlib)
that assume that SvREADONLY means read-only. Only one CPAN module,
POSIX::pselect will definitely be broken by this. Others may need to
be tweaked. But I believe this is for the better.
It causes all tests except ext/Devel-Peek/t/Peek.t (which needs a tiny
tweak still) to pass under PERL_OLD_COPY_ON_WRITE, which is a prereq-
uisite for any new COW scheme that creates COWs under the same cir-
cumstances.
Diffstat (limited to 'pp_hot.c')
| -rw-r--r-- | pp_hot.c | 2 |
1 files changed, 1 insertions, 1 deletions
@@ -1695,7 +1695,7 @@ Perl_do_readline(pTHX) } SvUPGRADE(sv, SVt_PV); tmplen = SvLEN(sv); /* remember if already alloced */ - if (!tmplen && !SvREADONLY(sv)) { + if (!tmplen && !SvREADONLY(sv) && !SvIsCOW(sv)) { /* try short-buffering it. Please update t/op/readline.t * if you change the growth length. */ |