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ruby_atomic.h: duplicate code

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* ruby_atomic.h (ATOMIC_SIZE_CAS): remove duplicate code as
  ATOMIC_CAS().

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@43995 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
This commit is contained in:
nobu 2013-12-05 01:47:58 +00:00
parent c06f12031e
commit b8434daf6b
1 changed files with 0 additions and 4 deletions
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4
ruby_atomic.h
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@ -16,10 +16,6 @@ typedef unsigned int rb_atomic_t;
# 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_CAS(var, oldval, newval) \
({ size_t oldvaldup = (oldval); \
__atomic_compare_exchange_n(&(var), &oldvaldup, (newval), 0, __ATOMIC_SEQ_CST, __ATOMIC_SEQ_CST); \
oldvaldup; })
#elif defined HAVE_GCC_SYNC_BUILTINS
/* @shyouhei hack to support atomic operations in case of gcc. Gcc