1 2 // Currently, SUN CC requires object file 3 4 #if defined (__GNUC__) 5 6 /* 7 ** int _STLP_atomic_exchange (__stl_atomic_t *pvalue, __stl_atomic_t value) 8 */ 9 10 # if defined(__sparc_v9__) || defined (__sparcv9) 11 12 # ifdef __arch64__ 13 14 # define _STLP_EXCH_ASM asm volatile ("casx [%3], %4, %0 ; membar #LoadLoad | #LoadStore " : \ 15 "=r" (_L_value2), "=m" (*_L_pvalue1) : \ 16 "m" (*_L_pvalue1), "r" (_L_pvalue1), "r" (_L_value1), "0" (_L_value2) ) 17 18 # else /* __arch64__ */ 19 20 # define _STLP_EXCH_ASM asm volatile ("cas [%3], %4, %0" : \ 21 "=r" (_L_value2), "=m" (*_L_pvalue1) : \ 22 "m" (*_L_pvalue1), "r" (_L_pvalue1), "r" (_L_value1), "0" (_L_value2) ) 23 # endif 24 25 # else /* __sparc_v9__ */ 26 27 # define _STLP_EXCH_ASM asm volatile ("swap [%3], %0 " : \ 28 "=r" (_L_value2), "=m" (*_L_pvalue1) : \ 29 "m" (*_L_pvalue1), "r" (_L_pvalue1), "0" (_L_value2) ) 30 # endif 31 32 33 # define _STLP_ATOMIC_EXCHANGE(__pvalue1, __value2) \ 34 ({ register volatile __stl_atomic_t *_L_pvalue1 = __pvalue1; \ 35 register __stl_atomic_t _L_value1, _L_value2 = __value2 ; \ 36 do { _L_value1 = *_L_pvalue1; _STLP_EXCH_ASM; } while ( _L_value1 != _L_value2 ) ; \ 37 _L_value1; }) 38 39 # define _STLP_ATOMIC_INCREMENT(__pvalue1) \ 40 ({ register volatile __stl_atomic_t *_L_pvalue1 = __pvalue1; \ 41 register __stl_atomic_t _L_value1, _L_value2; \ 42 do { _L_value1 = *_L_pvalue1; _L_value2 = _L_value1+1; _STLP_EXCH_ASM; } while ( _L_value1 != _L_value2 ) ; \ 43 (_L_value2 + 1); }) 44 45 # define _STLP_ATOMIC_DECREMENT(__pvalue1) \ 46 ({ register volatile __stl_atomic_t *_L_pvalue1 = __pvalue1; \ 47 register __stl_atomic_t _L_value1, _L_value2; \ 48 do { _L_value1 = *_L_pvalue1; _L_value2 = _L_value1-1; _STLP_EXCH_ASM; } while ( _L_value1 != _L_value2 ) ; \ 49 (_L_value2 - 1); }) 50 51 # elif ! defined (_STLP_NO_EXTERN_INLINE) 52 53 extern "C" __stl_atomic_t _STLP_atomic_exchange(__stl_atomic_t * __x, __stl_atomic_t __v); 54 extern "C" void _STLP_atomic_decrement(__stl_atomic_t* i); 55 extern "C" void _STLP_atomic_increment(__stl_atomic_t* i); 56 57 # define _STLP_ATOMIC_INCREMENT(__x) _STLP_atomic_increment((__stl_atomic_t*)__x) 58 # define _STLP_ATOMIC_DECREMENT(__x) _STLP_atomic_decrement((__stl_atomic_t*)__x) 59 # define _STLP_ATOMIC_EXCHANGE(__x, __y) _STLP_atomic_exchange((__stl_atomic_t*)__x, (__stl_atomic_t)__y) 60 61 #endif 62
