diff options
| -rw-r--r-- | ChangeLog | 5 | ||||
| -rw-r--r-- | configure.in | 13 | ||||
| -rw-r--r-- | signal.c | 2 |
3 files changed, 19 insertions, 1 deletions
@@ -1,3 +1,8 @@ +Tue Oct 26 09:13:34 2010 Nobuyoshi Nakada <nobu@ruby-lang.org> + + * configure.in (rb_cv_gcc_atomic_builtins): check for atomic + builtins, all are not available in Apple derivative gcc. + Tue Oct 26 00:29:26 2010 Nobuyoshi Nakada <nobu@ruby-lang.org> * Makefile.in (pkgconfig-data): create pkg-config metadata file. diff --git a/configure.in b/configure.in index 073da9355b..5dc59396a2 100644 --- a/configure.in +++ b/configure.in @@ -775,6 +775,19 @@ if test "$GCC" = yes; then AC_DEFINE_UNQUOTED([RUBY_ALIAS_FUNCTION_VOID(prot, name, args)], [RUBY_ALIAS_FUNCTION_TYPE(void, prot, name, args)]) fi + AC_CACHE_CHECK([for atomic builtins], [rb_cv_gcc_atomic_builtins], [ + AC_TRY_LINK([unsigned char atomic_var;], + [ + __sync_lock_test_and_set(&atomic_var, 0); + __sync_lock_test_and_set(&atomic_var, 1); + __sync_fetch_and_add(&atomic_var, 1); + __sync_fetch_and_sub(&atomic_var, 1); + ], + [rb_cv_gcc_atomic_builtins=yes], + [rb_cv_gcc_atomic_builtins=no])]) + if test "$rb_cv_gcc_atomic_builtins" = yes; then + AC_DEFINE(HAVE_GCC_ATOMIC_BUILTINS) + fi fi AC_CACHE_CHECK(for exported function attribute, rb_cv_func_exported, [ @@ -25,7 +25,7 @@ typedef LONG rb_atomic_t; # define ATOMIC_INC(var) InterlockedIncrement(&(var)) # define ATOMIC_DEC(var) InterlockedDecrement(&(var)) -#elif __GNUC__ >= 4 +#elif defined HAVE_GCC_ATOMIC_BUILTINS /* @shyouhei hack to support atomic operations in case of gcc. Gcc * has its own pseudo-insns to support them. See info, or * http://gcc.gnu.org/onlinedocs/gcc/Atomic-Builtins.html */ |