_atomic-sparc.h

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_RWSTD_NAMESPACE (__rw) {
 
#define _RWSTD_NO_CHAR_ATOMIC_OPS
#define _RWSTD_NO_SHORT_ATOMIC_OPS
#define _RWSTD_NO_LLONG_ATOMIC_OPS
 
extern "C" {
 
// define in assembler file "atomic-sparc.s" and "atomic-sparc64.s"
// exchange returns the original value, and add returns the incremented
// value
 
int  __rw_atomic_xchg32 (int*, int);
int  __rw_atomic_add32 (int*, int);
 
#  if defined (__sparcv9) || defined (__sparcv9__)
 
long __rw_atomic_xchg64 (long*, long);
long __rw_atomic_add64 (long*, long);
 
#  endif
 
}   // extern "C"
 
 
inline int
__rw_atomic_preincrement (int &__x, bool)
{
    _RWSTD_COMPILE_ASSERT (4 == sizeof (int));
    return __rw_atomic_add32 (&__x, 1);
}
 
 
inline unsigned
__rw_atomic_preincrement (unsigned &__x, bool)
{
    _RWSTD_COMPILE_ASSERT (4 == sizeof (unsigned));
    return __rw_atomic_add32 (_RWSTD_REINTERPRET_CAST (int*, &__x), 1);
}
 
 
inline int
__rw_atomic_predecrement (int &__x, bool)
{
    _RWSTD_COMPILE_ASSERT (4 == sizeof (int));
    return __rw_atomic_add32 (&__x, -1);
}
 
 
inline unsigned
__rw_atomic_predecrement (unsigned &__x, bool)
{
    _RWSTD_COMPILE_ASSERT (4 == sizeof (unsigned));
    return __rw_atomic_add32 (_RWSTD_REINTERPRET_CAST (int*, &__x), -1);
}
 
 
inline int
__rw_atomic_exchange (int &__x, int __y, bool)
{
    _RWSTD_COMPILE_ASSERT (4 == sizeof (int));
    return __rw_atomic_xchg32 (&__x, __y);
}
 
 
inline unsigned
__rw_atomic_exchange (unsigned &__x, unsigned __y, bool)
{
    _RWSTD_COMPILE_ASSERT (4 == sizeof (unsigned));
    return __rw_atomic_xchg32 (_RWSTD_REINTERPRET_CAST (int*, &__x),
                               _RWSTD_STATIC_CAST (int, __y));
}
 
#  if _RWSTD_INT_SIZE < _RWSTD_LONG_SIZE
 
inline long
__rw_atomic_preincrement (long &__x, bool)
{
    _RWSTD_COMPILE_ASSERT (8 == sizeof (long));
    return __rw_atomic_add64 (&__x, 1);
}
 
 
inline unsigned long
__rw_atomic_preincrement (unsigned long &__x, bool)
{
    _RWSTD_COMPILE_ASSERT (8 == sizeof (unsigned long));
    return __rw_atomic_add64 (_RWSTD_REINTERPRET_CAST (long*, &__x), 1);
}
 
 
inline long
__rw_atomic_predecrement (long &__x, bool)
{
    _RWSTD_COMPILE_ASSERT (8 == sizeof (long));
    return __rw_atomic_add64 (&__x, -1);
}
 
 
inline unsigned long
__rw_atomic_predecrement (unsigned long &__x, bool)
{
    _RWSTD_COMPILE_ASSERT (8 == sizeof (unsigned long));
    return __rw_atomic_add64 (_RWSTD_REINTERPRET_CAST (long*, &__x), -1);
}
 
 
inline long
__rw_atomic_exchange (long &__x, long __y, bool)
{
    _RWSTD_COMPILE_ASSERT (8 == sizeof (long));
    return __rw_atomic_xchg64 (&__x, __y);
}
 
 
inline unsigned long
__rw_atomic_exchange (unsigned long &__x, unsigned long __y, bool)
{
    _RWSTD_COMPILE_ASSERT (8 == sizeof (unsigned long));
    return __rw_atomic_xchg64 (_RWSTD_REINTERPRET_CAST (long*, &__x),
                               _RWSTD_STATIC_CAST (long, __y));
}
 
#  else   // _RWSTD_INT_SIZE == _RWSTD_LONG_SIZE
#    define _RWSTD_NO_LONG_ATOMIC_OPS
#  endif   // _RWSTD_INT_SIZE < _RWSTD_LONG_SIZE
 
}   // namespace __rw