_atomic-deccxx.h

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// get declarations of __ATOMIC_XXX intrinsics
#  include <machine/builtins.h>
 
#define _RWSTD_NO_CHAR_ATOMIC_OPS
#define _RWSTD_NO_SHORT_ATOMIC_OPS
#define _RWSTD_NO_LLONG_ATOMIC_OPS
 
_RWSTD_NAMESPACE (__rw) {
 
// __ATOMIC_[DE|IN]CREMENT_[LONG|QUAD] and __ATOMIC_EXCH_[LONG|QUAD] are
// intrinsic functions declared in <machine/builtins.h> that atomically
// modify their argument and return its original value (__ATOMIC_XXX_LONG
// is misnamed -- it actually operates on an int, not a long)
 
inline int
__rw_atomic_preincrement (int &__x, bool)
{
    return 1 + __ATOMIC_INCREMENT_LONG (&__x);
}
 
 
inline unsigned
__rw_atomic_preincrement (unsigned &__x, bool)
{
    return __rw_atomic_preincrement (_RWSTD_REINTERPRET_CAST (int&, __x),
                                     false);
}
 
 
inline long
__rw_atomic_preincrement (long &__x, bool)
{
    return 1 + __ATOMIC_INCREMENT_QUAD (&__x);
}
 
 
inline unsigned long
__rw_atomic_preincrement (unsigned long &__x, bool)
{
    return __rw_atomic_preincrement (_RWSTD_REINTERPRET_CAST (long&, __x),
                                     false);
}
 
 
inline int
__rw_atomic_predecrement (int &__x, bool)
{
    return __ATOMIC_DECREMENT_LONG (&__x) - 1;
}
 
 
inline unsigned
__rw_atomic_predecrement (unsigned &__x, bool)
{
    return __rw_atomic_predecrement (_RWSTD_REINTERPRET_CAST (int&, __x),
                                     false);
}
 
 
inline long
__rw_atomic_predecrement (long &__x, bool)
{
    return __ATOMIC_DECREMENT_QUAD (&__x) - 1;
}
 
 
inline unsigned long
__rw_atomic_predecrement (unsigned long &__x, bool)
{
    return __rw_atomic_predecrement (_RWSTD_REINTERPRET_CAST (long&, __x),
                                     false);
}
 
 
inline int
__rw_atomic_exchange (int &__x, int __y, bool)
{
    return __ATOMIC_EXCH_LONG (&__x, __y);
}
 
 
inline unsigned
__rw_atomic_exchange (unsigned &__x, unsigned __y, bool)
{
    return __rw_atomic_exchange (_RWSTD_REINTERPRET_CAST (unsigned&, __x),
                                 _RWSTD_STATIC_CAST (int, __y), false);
}
 
 
inline long
__rw_atomic_exchange (long &__x, long __y, bool)
{
    return __ATOMIC_EXCH_QUAD (&__x, __y);
}
 
 
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);
}
 
}   // namespace __rw