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* ruby_atomic.h (ATOMIC_CAS): added for Solaris and other platforms.

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* ruby_atomic.h, signal.c (NEED_RUBY_ATOMIC_OPS): renamed from
  NEED_RUBY_ATOMIC_EXCHANGE.
* signal.c (ruby_atomic_compare_and_swap): naive, non-atomic
  compare-and-swap implementation only used for platforms without
  valid support for atomic operations.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@37897 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
This commit is contained in:
ngoto 2012-11-27 10:21:59 +00:00
parent 6d1266a879
commit 5faf4cc77b
3 changed files with 27 additions and 2 deletions
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7
ruby_atomic.h
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@ -73,6 +73,7 @@ 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))
@ -90,14 +91,18 @@ typedef unsigned int rb_atomic_t;
#else
typedef int rb_atomic_t;
#define NEED_RUBY_ATOMIC_EXCHANGE
#define NEED_RUBY_ATOMIC_OPS
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))