diff options
| author | nagachika <nagachika@b2dd03c8-39d4-4d8f-98ff-823fe69b080e> | 2013-12-21 07:02:57 +0000 |
|---|---|---|
| committer | nagachika <nagachika@b2dd03c8-39d4-4d8f-98ff-823fe69b080e> | 2013-12-21 07:02:57 +0000 |
| commit | 32716d474e01418bc79afcaa4853fff1eabc4221 (patch) | |
| tree | bc41cc736cbaa3e5d25e1fa9fffea046b01adacc /ruby_atomic.h | |
| parent | 34b8c43077108cdb423a61bb9ea5b7a9bd97fc03 (diff) | |
merge revision(s) 43851,43882,43883,43995:
* 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.
* ruby_atomic.h: define ATOMIC_SIZE_CAS() with
__atomic_compare_exchange_n() and refactoring.
* ruby_atomic.h: remove duplicate definisions between ATOMIC_XXX
and ATOMIC_SIZE_XXX.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_0_0@44316 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
Diffstat (limited to 'ruby_atomic.h')
| -rw-r--r-- | ruby_atomic.h | 29 |
1 files changed, 24 insertions, 5 deletions
diff --git a/ruby_atomic.h b/ruby_atomic.h index 7e16d287f8..8e574153af 100644 --- a/ruby_atomic.h +++ b/ruby_atomic.h @@ -3,6 +3,21 @@ #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__(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) + +#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 */ @@ -17,9 +32,6 @@ typedef unsigned int rb_atomic_t; /* Anything OK */ # define ATOMIC_SIZE_ADD(var, val) __sync_fetch_and_add(&(var), (val)) # define ATOMIC_SIZE_SUB(var, val) __sync_fetch_and_sub(&(var), (val)) -# define ATOMIC_SIZE_INC(var) __sync_fetch_and_add(&(var), 1) -# define ATOMIC_SIZE_DEC(var) __sync_fetch_and_sub(&(var), 1) -# define ATOMIC_SIZE_EXCHANGE(var, val) __sync_lock_test_and_set(&(var), (val)) #elif defined _WIN32 #if defined _MSC_VER && _MSC_VER > 1200 @@ -117,8 +129,6 @@ extern rb_atomic_t ruby_atomic_compare_and_swap(rb_atomic_t *ptr, # define ATOMIC_SIZE_ADD(var, val) (void)((var) += (val)) # define ATOMIC_SIZE_SUB(var, val) (void)((var) -= (val)) -# define ATOMIC_SIZE_INC(var) ((var)++) -# define ATOMIC_SIZE_DEC(var) ((var)--) # define ATOMIC_SIZE_EXCHANGE(var, val) atomic_size_exchange(&(var), (val)) static inline size_t atomic_size_exchange(size_t *ptr, size_t val) @@ -129,6 +139,15 @@ atomic_size_exchange(size_t *ptr, size_t val) } #endif +#ifndef ATOMIC_SIZE_INC +# define ATOMIC_SIZE_INC(var) ATOMIC_INC(var) +#endif +#ifndef ATOMIC_SIZE_DEC +# define ATOMIC_SIZE_DEC(var) ATOMIC_DEC(var) +#endif +#ifndef ATOMIC_SIZE_EXCHANGE +# define ATOMIC_SIZE_EXCHANGE(var, val) ATOMIC_EXCHANGE(var, val) +#endif #ifndef ATOMIC_SIZE_CAS # define ATOMIC_SIZE_CAS(var, oldval, val) ATOMIC_CAS(var, oldval, val) #endif |