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* ruby_atomic.h: define ATOMIC_SIZE_CAS() with

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__atomic_compare_exchange_n() and refactoring.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@43882 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
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glass 2013-11-27 14:57:33 +00:00
parent da66677061
commit b983511292
2 changed files with 12 additions and 5 deletions
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ChangeLog
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@ -1,3 +1,8 @@
Wed Nov 27 23:55:50 2013 Masaki Matsushita <glass.saga@gmail.com>
* ruby_atomic.h: define ATOMIC_SIZE_CAS() with
__atomic_compare_exchange_n() and refactoring.
Tue Nov 27 21:43:00 2013 Akira Matsuda <ronnie@dio.jp>
* lib/irb/notifier.rb: [Doc] Fix typo

12
ruby_atomic.h
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@ -10,17 +10,19 @@ typedef unsigned int rb_atomic_t;
# 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; })
({ __typeof__(oldval) oldvaldup = (oldval); /* oldval should not be modified */ \
__atomic_compare_exchange_n(&(var), &oldvaldup, (newval), 0, __ATOMIC_SEQ_CST, __ATOMIC_SEQ_CST); \
oldvaldup; })
# 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)
# 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