kotovalexarian-likes-github/ruby--ruby
1
0
Fork 0
mirror of https://github.com/ruby/ruby.git synced 2022-11-09 12:17:21 -05:00
Code Releases Activity

ruby_atomic.h: atomic VALUE operations

Browse source 
* ruby_atomic.h (ATOMIC_VALUE_EXCHANGE, ATOMIC_VALUE_CAS): add
  atomic operations for VALUE.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@51498 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
This commit is contained in:
nobu 2015-08-06 01:44:03 +00:00
parent ff7eb4c656
commit ec10c033a7
5 changed files with 76 additions and 12 deletions
Download patch file Download diff file Expand all files Collapse all files

73
ruby_atomic.h
View file

@ -17,8 +17,7 @@ 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_PTR_EXCHANGE(var, val) __atomic_exchange_n(&(var), (val), __ATOMIC_SEQ_CST)
# define ATOMIC_PTR_CAS(var, oldval, newval) ATOMIC_CAS(var, oldval, newval)
# define RUBY_ATOMIC_GENERIC_MACRO 1
#elif defined HAVE_GCC_SYNC_BUILTINS
/* @shyouhei hack to support atomic operations in case of gcc. Gcc
@ -36,8 +35,7 @@ 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_PTR_EXCHANGE(var, val) __sync_lock_test_and_set(&(var), (val))
# define ATOMIC_PTR_CAS(var, oldval, newval) ATOMIC_CAS(var, oldval, newval)
# define RUBY_ATOMIC_GENERIC_MACRO 1
#elif defined _WIN32
#if defined _MSC_VER && _MSC_VER > 1200
@ -135,9 +133,9 @@ 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_EXCHANGE(var, val) atomic_size_exchange(&(var), (val))
# define ATOMIC_SIZE_EXCHANGE(var, val) ruby_atomic_size_exchange(&(var), (val))
static inline size_t
atomic_size_exchange(size_t *ptr, size_t val)
ruby_atomic_size_exchange(size_t *ptr, size_t val)
{
size_t old = *ptr;
*ptr = val;
@ -158,14 +156,77 @@ atomic_size_exchange(size_t *ptr, size_t val)
# define ATOMIC_SIZE_CAS(var, oldval, val) ATOMIC_CAS(var, oldval, val)
#endif
#if RUBY_ATOMIC_GENERIC_MACRO
# ifndef ATOMIC_PTR_EXCHANGE
# define ATOMIC_PTR_EXCHANGE(var, val) ATOMIC_EXCHANGE(var, val)
# endif
# ifndef ATOMIC_PTR_CAS
# define ATOMIC_PTR_CAS(var, oldval, newval) ATOMIC_CAS(var, oldval, newval)
# endif
# ifndef ATOMIC_VALUE_EXCHANGE
# define ATOMIC_VALUE_EXCHANGE(var, val) ATOMIC_EXCHANGE(var, val)
# endif
# ifndef ATOMIC_VALUE_CAS
# define ATOMIC_VALUE_CAS(var, oldval, val) ATOMIC_CAS(var, oldval, newval)
# endif
#endif
#ifndef ATOMIC_PTR_EXCHANGE
# if SIZEOF_VOIDP == SIZEOF_SIZE_T
# define ATOMIC_PTR_EXCHANGE(var, val) (void *)ATOMIC_SIZE_EXCHANGE(*(size_t *)&(var), (size_t)(val))
# else
# define ATOMIC_PTR_EXCHANGE(var, val) ruby_atomic_ptr_exchange((const void **)&(var), (val))
static inline void *
ruby_atomic_ptr_exchange(const void **ptr, const void *val)
{
const void *const old = *ptr;
*ptr = val;
return (void *)old;
}
# endif
#endif
#ifndef ATOMIC_PTR_CAS
# if SIZEOF_VOIDP == SIZEOF_SIZE_T
# define ATOMIC_PTR_CAS(var, oldval, val) (void *)ATOMIC_SIZE_CAS(*(size_t *)&(var), (size_t)(oldval), (size_t)(val))
# else
# define ATOMIC_PTR_CAS(var, oldval, val) ruby_atomic_ptr_cas(&(var), (oldval), (val))
static inline void *
ruby_atomic_ptr_cas(const void **ptr, const void *oldval, const void *val)
{
const void *const old = *ptr;
if (old == oldval) *ptr = val;
return (void *)old;
}
# endif
#endif
#ifndef ATOMIC_VALUE_EXCHANGE
# if SIZEOF_VALUE == SIZEOF_SIZE_T
# define ATOMIC_VALUE_EXCHANGE(var, val) ATOMIC_SIZE_EXCHANGE(*(size_t *)&(var), (size_t)(val))
# else
# define ATOMIC_VALUE_EXCHANGE(var, val) ruby_atomic_value_exchange(&(var), (val))
static inline VALUE
ruby_atomic_value_exchange(VALUE *ptr, VALUE val)
{
const VALUE old = *ptr;
*ptr = val;
return old;
}
# endif
#endif
#ifndef ATOMIC_VALUE_CAS
# if SIZEOF_VALUE == SIZEOF_SIZE_T
# define ATOMIC_VALUE_CAS(var, oldval, val) ATOMIC_SIZE_CAS(*(size_t *)&(var), (size_t)(oldval), (size_t)(val))
# else
# define ATOMIC_VALUE_CAS(var, oldval, val) ruby_atomic_value_cas(&(var), (oldval), (val))
static inline VALUE
ruby_atomic_value_cas(VALUE *ptr, VALUE oldval, VALUE val)
{
const VALUE old = *ptr;
if (old == oldval) *ptr = val;
return old;
}
# endif
#endif