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| author | akr <akr@b2dd03c8-39d4-4d8f-98ff-823fe69b080e> | 2008-01-04 17:21:53 +0000 |
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| committer | akr <akr@b2dd03c8-39d4-4d8f-98ff-823fe69b080e> | 2008-01-04 17:21:53 +0000 |
| commit | bb8f7e7a4e6e45962dfadc3c7e840d25210dbe0f (patch) | |
| tree | 4b29a35a37f21114436fcb92450dc1615c5f61d1 /include/ruby | |
| parent | 11eba8c8ad40821ac822d30067f7947b5156adf1 (diff) | |
| download | ruby-bb8f7e7a4e6e45962dfadc3c7e840d25210dbe0f.tar.gz ruby-bb8f7e7a4e6e45962dfadc3c7e840d25210dbe0f.tar.xz ruby-bb8f7e7a4e6e45962dfadc3c7e840d25210dbe0f.zip | |
* include/ruby/ruby.h (rb_intern): memorize interned ID for constant
string, using gcc's __builtin_constant_p and statement expression.
git-svn-id: http://svn.ruby-lang.org/repos/ruby/trunk@14888 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
Diffstat (limited to 'include/ruby')
| -rw-r--r-- | include/ruby/ruby.h | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/include/ruby/ruby.h b/include/ruby/ruby.h index 3f2883728..ecc9bfd92 100644 --- a/include/ruby/ruby.h +++ b/include/ruby/ruby.h @@ -719,6 +719,20 @@ const char *rb_id2name(ID); ID rb_to_id(VALUE); VALUE rb_id2str(ID); +#ifdef __GNUC__ +/* __builtin_constant_p and statement expression is available + * since gcc-2.7.2.3 at least. */ +#define rb_intern(str) \ + (__builtin_constant_p(str) ? \ + ({ \ + static ID rb_intern_id_cache; \ + if (!rb_intern_id_cache) \ + rb_intern_id_cache = rb_intern(str); \ + rb_intern_id_cache; \ + }) : \ + rb_intern(str)) +#endif + char *rb_class2name(VALUE); char *rb_obj_classname(VALUE); |