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gc.h: evaluate the macro argument only once

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* gc.h (RUBY_MARK_UNLESS_NULL): evaluate the argument only once
  to get rid of inadvertent side effects.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@51247 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
This commit is contained in:
nobu 2015-07-14 23:59:23 +00:00
parent 994460c4db
commit bb8abf62d3
2 changed files with 9 additions and 1 deletions
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5
ChangeLog
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@ -1,3 +1,8 @@
Wed Jul 15 08:59:19 2015 Nobuyoshi Nakada <nobu@ruby-lang.org>
* gc.h (RUBY_MARK_UNLESS_NULL): evaluate the argument only once
to get rid of inadvertent side effects.
Wed Jul 15 02:53:11 2015 Koichi Sasada <ko1@atdot.net>
* vm_core.h, vm.c: remove rb_proc_t::envval because we can know it via

5
gc.h
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@ -57,7 +57,10 @@ rb_gc_debug_body(const char *mode, const char *msg, int st, void *ptr)
#define RUBY_GC_INFO if(0)printf
#endif
#define RUBY_MARK_UNLESS_NULL(ptr) if(RTEST(ptr)){rb_gc_mark(ptr);}
#define RUBY_MARK_UNLESS_NULL(ptr) do { \
VALUE markobj = (ptr); \
if (RTEST(markobj)) {rb_gc_mark(markobj);} \
} while (0)
#define RUBY_FREE_UNLESS_NULL(ptr) if(ptr){ruby_xfree(ptr);(ptr)=NULL;}
#if STACK_GROW_DIRECTION > 0