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| author | nobu <nobu@b2dd03c8-39d4-4d8f-98ff-823fe69b080e> | 2014-04-04 08:34:12 +0000 |
|---|---|---|
| committer | nobu <nobu@b2dd03c8-39d4-4d8f-98ff-823fe69b080e> | 2014-04-04 08:34:12 +0000 |
| commit | e18259424ea6f1baafacab442d57c05d51c2548b (patch) | |
| tree | e054a11ce590506a78cb7083e82d7859a2df92a5 /eval_intern.h | |
| parent | 9dd0113023283583441fc4f3cc571c275ec5ec0b (diff) | |
| download | ruby-e18259424ea6f1baafacab442d57c05d51c2548b.tar.gz | |
eval_intern.h: VAR_INITIALIZED
* eval_intern.h (VAR_INITIALIZED): macro to suppress
maybe-uninitialized warnings by gcc 4.7 and 4.8.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@45516 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
Diffstat (limited to 'eval_intern.h')
| -rw-r--r-- | eval_intern.h | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/eval_intern.h b/eval_intern.h index f81f922269..f19c252918 100644 --- a/eval_intern.h +++ b/eval_intern.h @@ -128,6 +128,14 @@ extern int select_large_fdset(int, fd_set *, fd_set *, fd_set *, struct timeval #define PUSH_TAG() TH_PUSH_TAG(GET_THREAD()) #define POP_TAG() TH_POP_TAG() +#if defined __GNUC__ && __GNUC__ == 4 && (__GNUC_MINOR__ == 7 || __GNUC_MINOR__ == 8) +# define VAR_FROM_MEMORY(var) __extension__(*(__typeof__(var) volatile *)&(var)) +# define VAR_INITIALIZED(var) ((var) = VAR_FROM_MEMORY(var)) +#else +# define VAR_FROM_MEMORY(var) (var) +# define VAR_INITIALIZED(var) ((void)&(var)) +#endif + /* clear th->state, and return the value */ static inline int rb_threadptr_tag_state(rb_thread_t *th) @@ -150,7 +158,7 @@ rb_threadptr_tag_jump(rb_thread_t *th, int st) [ISO/IEC 9899:1999] 7.13.1.1 */ #define TH_EXEC_TAG() \ - (ruby_setjmp(_tag.buf) ? rb_threadptr_tag_state(_th) : (TH_REPUSH_TAG(), 0)) + (ruby_setjmp(_tag.buf) ? rb_threadptr_tag_state(VAR_FROM_MEMORY(_th)) : (TH_REPUSH_TAG(), 0)) #define EXEC_TAG() \ TH_EXEC_TAG() |