diff options
| author | nobu <nobu@b2dd03c8-39d4-4d8f-98ff-823fe69b080e> | 2015-07-14 23:59:23 +0000 |
|---|---|---|
| committer | nobu <nobu@b2dd03c8-39d4-4d8f-98ff-823fe69b080e> | 2015-07-14 23:59:23 +0000 |
| commit | 1ca0f9452ba2aa5f286578b2a37be05fc2d3ed39 (patch) | |
| tree | 056ff384515a4d220ef0e5b7216a4a3d7d9d0101 /gc.h | |
| parent | 4659b47a9ebc9476fdf313e5e56abe3d182bd726 (diff) | |
| download | ruby-1ca0f9452ba2aa5f286578b2a37be05fc2d3ed39.tar.gz | |
gc.h: evaluate the macro argument only once
* 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
Diffstat (limited to 'gc.h')
| -rw-r--r-- | gc.h | 5 |
1 files changed, 4 insertions, 1 deletions
@@ -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 |