diff options
| author | glass <glass@b2dd03c8-39d4-4d8f-98ff-823fe69b080e> | 2013-11-26 02:45:53 +0000 |
|---|---|---|
| committer | glass <glass@b2dd03c8-39d4-4d8f-98ff-823fe69b080e> | 2013-11-26 02:45:53 +0000 |
| commit | 0791c940ad9c4749e72accb91c7e22e684fde668 (patch) | |
| tree | c82d6024bc65b84a2bc7c2fdbc3d6ec2ea181e0f /ruby_atomic.h | |
| parent | 6295a023a5907af6f984aa5eeb9e64f99c5acf2b (diff) | |
* ruby_atomic.h: use __atomic builtin functions supported by GCC.
__sync family are legacy functions now and it is recommended
that new code use the __atomic functions.
http://gcc.gnu.org/onlinedocs/gcc/_005f_005fatomic-Builtins.html
* configure.in: check existence of __atomic functions.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@43851 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
Diffstat (limited to 'ruby_atomic.h')
| -rw-r--r-- | ruby_atomic.h | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/ruby_atomic.h b/ruby_atomic.h index 7e16d287f8..091a608011 100644 --- a/ruby_atomic.h +++ b/ruby_atomic.h @@ -3,6 +3,26 @@ #if 0 #elif defined HAVE_GCC_ATOMIC_BUILTINS +typedef unsigned int rb_atomic_t; +# define ATOMIC_SET(var, val) (void)__atomic_exchange_n(&(var), (val), __ATOMIC_SEQ_CST) +# define ATOMIC_INC(var) __atomic_fetch_add(&(var), 1, __ATOMIC_SEQ_CST) +# define ATOMIC_DEC(var) __atomic_fetch_sub(&(var), 1, __ATOMIC_SEQ_CST) +# define ATOMIC_OR(var, val) __atomic_or_fetch(&(var), (val), __ATOMIC_SEQ_CST) +# define ATOMIC_EXCHANGE(var, val) __atomic_exchange_n(&(var), (val), __ATOMIC_SEQ_CST) +# define ATOMIC_CAS(var, oldval, newval) \ +({ __typeof__(__typeof__(var) *) ptr = &(var); /* expression var may have side effects */ \ + __typeof__(oldval) oldvaldup = (oldval); /* oldval should not be modified */ \ + __typeof__(var) tmp = *ptr; \ + __atomic_compare_exchange_n(ptr, &oldvaldup, (newval), 0, __ATOMIC_SEQ_CST, __ATOMIC_SEQ_CST); \ + tmp; }) + +# define ATOMIC_SIZE_ADD(var, val) __atomic_fetch_add(&(var), (val), __ATOMIC_SEQ_CST) +# define ATOMIC_SIZE_SUB(var, val) __atomic_fetch_sub(&(var), (val), __ATOMIC_SEQ_CST) +# define ATOMIC_SIZE_INC(var) __atomic_fetch_add(&(var), 1, __ATOMIC_SEQ_CST) +# define ATOMIC_SIZE_DEC(var) __atomic_fetch_sub(&(var), 1, __ATOMIC_SEQ_CST) +# define ATOMIC_SIZE_EXCHANGE(var, val) __atomic_exchange_n(&(var), (val), __ATOMIC_SEQ_CST) + +#elif defined HAVE_GCC_SYNC_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 */ |