_atomic-xlc.h

Go to the documentation of this file.

 
#include <sys/atomic_op.h>
 
#define _RWSTD_NO_CHAR_ATOMIC_OPS
#define _RWSTD_NO_SHORT_ATOMIC_OPS
#define _RWSTD_NO_LLONG_ATOMIC_OPS
 
_RWSTD_NAMESPACE (__rw) {
 
inline int
__rw_atomic_preincrement (int &__x, bool)
{
    return fetch_and_add (&__x, 1) + 1;
}
 
 
inline unsigned
__rw_atomic_preincrement (unsigned &__x, bool)
{
    return __rw_atomic_preincrement (_RWSTD_REINTERPRET_CAST (int&, __x),
                                     false);
}
 
 
inline int
__rw_atomic_predecrement (int &__x, bool)
{
    return fetch_and_add(&__x,-1) - 1;
}
 
 
inline unsigned
__rw_atomic_predecrement (unsigned &__x, bool)
{
    return __rw_atomic_predecrement (_RWSTD_REINTERPRET_CAST (int&, __x),
                                     false);
}
 
 
inline int
__rw_atomic_exchange (int &__x, int __y, bool)
{
    int __tmp;
 
    do {
        __tmp = __x;
    } while (!compare_and_swap (&__x, &__tmp, __y));
 
    return __tmp;
}
 
 
inline unsigned
__rw_atomic_exchange (unsigned &__x, unsigned __y, bool)
{
    return __rw_atomic_exchange (_RWSTD_REINTERPRET_CAST (int&, __x),
                                 _RWSTD_STATIC_CAST (int, __y), false);
}
 
 
#  if _RWSTD_INT_SIZE < _RWSTD_LONG_SIZE
 
inline long
__rw_atomic_preincrement (long &__x, bool)
{
    return fetch_and_addlp (&__x, 1) + 1;
}
 
 
inline unsigned long
__rw_atomic_preincrement (unsigned long &__x, bool)
{
  return __rw_atomic_preincrement (_RWSTD_REINTERPRET_CAST (long&, __x),
                                   false);
}
 
 
inline long
__rw_atomic_predecrement (long &__x, bool)
{
    return fetch_and_addlp (&__x, -1) - 1;
}
 
 
inline unsigned long
__rw_atomic_predecrement (unsigned long &__x, bool)
{
    return __rw_atomic_predecrement (_RWSTD_REINTERPRET_CAST (long&, __x),
                                     false);
}
 
 
inline long
__rw_atomic_exchange (long &__x, long __y, bool)
{
    long __tmp;
 
    do {
        __tmp = __x;
    } while (!compare_and_swaplp (&__x, &__tmp, __y));
 
    return __tmp;
}
 
 
inline unsigned long
__rw_atomic_exchange (unsigned long &__x, unsigned long __y, bool)
{
    return __rw_atomic_exchange (_RWSTD_REINTERPRET_CAST (long&, __x),
                                 _RWSTD_STATIC_CAST (long, __y), false);
}
 
#  else   // _RWSTD_INT_SIZE == _RWSTD_LONG_SIZE
#    define _RWSTD_NO_LONG_ATOMIC_OPS
#  endif   // _RWSTD_INT_SIZE < _RWSTD_LONG_SIZE
 
}   // namespace __rw