diff options
| author | shyouhei <shyouhei@b2dd03c8-39d4-4d8f-98ff-823fe69b080e> | 2018-01-15 02:35:17 +0000 |
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| committer | shyouhei <shyouhei@b2dd03c8-39d4-4d8f-98ff-823fe69b080e> | 2018-01-15 02:35:17 +0000 |
| commit | 21429b1488faf58b6683eef2c9c24e00796a32ae (patch) | |
| tree | fb40e9ac8dc96491b6a2e3fefc221384784974c9 /include/ruby/defines.h | |
| parent | f089a52865bd82a327fe9ef460cecdb812dcb56c (diff) | |
__alignof__ to take alignment of a type
C11 and C++11 has this feature so why not use it when available.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@61828 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
Diffstat (limited to 'include/ruby/defines.h')
| -rw-r--r-- | include/ruby/defines.h | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/include/ruby/defines.h b/include/ruby/defines.h index da2ba24109..322df4c6d2 100644 --- a/include/ruby/defines.h +++ b/include/ruby/defines.h @@ -380,6 +380,16 @@ void rb_ia64_flushrs(void); #define RUBY_ALIGNAS(x) y #endif +#ifdef RUBY_ALIGNOF +/* OK, take that definition */ +#elif defined(__cplusplus) && (__cplusplus >= 201103L) +#define RUBY_ALIGNOF alignof +#elif defined(__STDC_VERSION__) && (__STDC_VERSION__ >= 201112L) +#define RUBY_ALIGNOF _Alignof +#else +#define RUBY_ALIGNOF(x) ((size_t)offsetof(struct { char f1; type f2; }, f2)) +#endif + RUBY_SYMBOL_EXPORT_END #if defined(__cplusplus) |