diff options
author | usa <usa@b2dd03c8-39d4-4d8f-98ff-823fe69b080e> | 2014-02-14 07:22:21 +0000 |
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committer | usa <usa@b2dd03c8-39d4-4d8f-98ff-823fe69b080e> | 2014-02-14 07:22:21 +0000 |
commit | 7493417468a731e73d0346e3bdb7bdc59d453735 (patch) | |
tree | 1a84e399312404f4694e5cd91adead8a4e4d8963 /ruby_atomic.h | |
parent | 3941326541216dd630a5b1521a62950789ac19c3 (diff) |
* ruby_atomic.h (ATOMIC_CAS): added.
* signal.c (ruby_atomic_compare_and_swap): ATOMIC_CAS implementation
for non-VC/gcc platform.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_1_9_3@44950 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
Diffstat (limited to 'ruby_atomic.h')
-rw-r--r-- | ruby_atomic.h | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/ruby_atomic.h b/ruby_atomic.h index 548adee347..1c64eadb91 100644 --- a/ruby_atomic.h +++ b/ruby_atomic.h @@ -13,6 +13,7 @@ typedef unsigned int rb_atomic_t; /* Anything OK */ # define ATOMIC_DEC(var) __sync_fetch_and_sub(&(var), 1) # define ATOMIC_OR(var, val) __sync_or_and_fetch(&(var), (val)) # define ATOMIC_EXCHANGE(var, val) __sync_lock_test_and_set(&(var), (val)) +# define ATOMIC_CAS(var, oldval, newval) __sync_val_compare_and_swap(&(var), (oldval), (newval)) # define ATOMIC_SIZE_ADD(var, val) __sync_fetch_and_add(&(var), (val)) # define ATOMIC_SIZE_SUB(var, val) __sync_fetch_and_sub(&(var), (val)) @@ -49,7 +50,17 @@ rb_w32_atomic_or(volatile rb_atomic_t *var, rb_atomic_t val) # define ATOMIC_OR(var, val) _InterlockedOr(&(var), (val)) #endif # define ATOMIC_EXCHANGE(var, val) InterlockedExchange(&(var), (val)) +# define ATOMIC_CAS(var, oldval, newval) InterlockedCompareExchange(&(var), (newval), (oldval)) +# if defined _MSC_VER && _MSC_VER <= 1200 +static inline rb_atomic_t +rb_w32_atomic_cas(volatile rb_atomic_t *var, rb_atomic_t oldval, rb_atomic_t newval) +{ + return (rb_atomic_t)InterlockedCompareExchange((PVOID *)var, (PVOID)newval, (PVOID)oldval); +} +# undef ATOMIC_CAS +# define ATOMIC_CAS(var, oldval, newval) rb_w32_atomic_cas(&(var), (oldval), (newval)) +# endif # ifdef _M_AMD64 # define ATOMIC_SIZE_ADD(var, val) InterlockedExchangeAdd64(&(var), (val)) # define ATOMIC_SIZE_SUB(var, val) InterlockedExchangeAdd64(&(var), -(val)) @@ -74,6 +85,7 @@ typedef unsigned int rb_atomic_t; # define ATOMIC_DEC(var) atomic_dec_uint(&(var)) # define ATOMIC_OR(var, val) atomic_or_uint(&(var), (val)) # define ATOMIC_EXCHANGE(var, val) atomic_swap_uint(&(var), (val)) +# define ATOMIC_CAS(var, oldval, newval) atomic_cas_uint(&(var), (oldval), (newval)) # if SIZEOF_SIZE_T == SIZEOF_LONG # define ATOMIC_SIZE_ADD(var, val) atomic_add_long(&(var), (val)) @@ -93,12 +105,16 @@ typedef unsigned int rb_atomic_t; typedef int rb_atomic_t; #define NEED_RUBY_ATOMIC_EXCHANGE extern rb_atomic_t ruby_atomic_exchange(rb_atomic_t *ptr, rb_atomic_t val); +extern rb_atomic_t ruby_atomic_compare_and_swap(rb_atomic_t *ptr, + rb_atomic_t cmp, + rb_atomic_t newval); # define ATOMIC_SET(var, val) (void)((var) = (val)) # define ATOMIC_INC(var) ((var)++) # define ATOMIC_DEC(var) ((var)--) # define ATOMIC_OR(var, val) ((var) |= (val)) # define ATOMIC_EXCHANGE(var, val) ruby_atomic_exchange(&(var), (val)) +# define ATOMIC_CAS(var, oldval, newval) ruby_atomic_compare_and_swap(&(var), (oldval), (newval)) # define ATOMIC_SIZE_ADD(var, val) (void)((var) += (val)) # define ATOMIC_SIZE_SUB(var, val) (void)((var) -= (val)) |