1 /*

     2 * Copyright (c) 2009 Nokia Corporation and/or its subsidiary(-ies).

     3 * All rights reserved.

     4 * This component and the accompanying materials are made available

     5 * under the terms of "Eclipse Public License v1.0"

     6 * which accompanies this distribution, and is available

     7 * at the URL "http://www.eclipse.org/legal/epl-v10.html".

     8 *

     9 * Initial Contributors:

    10 * Nokia Corporation - initial contribution.

    11 *

    12 * Contributors:

    13 *

    14 * Description: 

    15 *

    16 */

    17 

    18 // Currently, SUN CC requires object file

    19 

    20 #if defined (__GNUC__)

    21 

    22 /*

    23 **  int _STLP_atomic_exchange (__stl_atomic_t *pvalue, __stl_atomic_t value)

    24 */

    25 

    26 # if defined(__sparc_v9__) || defined (__sparcv9) 

    27 

    28 #  ifdef __arch64__

    29 

    30 #   define _STLP_EXCH_ASM  asm volatile ("casx [%3], %4, %0 ;  membar  #LoadLoad | #LoadStore " : \

    31                    "=r" (_L_value2), "=m" (*_L_pvalue1) : \

    32                    "m" (*_L_pvalue1), "r" (_L_pvalue1), "r" (_L_value1), "0" (_L_value2) )

    33 

    34 #  else /* __arch64__ */

    35 

    36 #   define _STLP_EXCH_ASM  asm volatile ("cas [%3], %4, %0" : \

    37                    "=r" (_L_value2), "=m" (*_L_pvalue1) : \

    38                    "m" (*_L_pvalue1), "r" (_L_pvalue1), "r" (_L_value1), "0" (_L_value2) )

    39 #  endif

    40 

    41 # else /* __sparc_v9__ */

    42 

    43 #  define _STLP_EXCH_ASM asm volatile ("swap [%3], %0 " : \

    44                                        "=r" (_L_value2), "=m" (*_L_pvalue1) : \

    45                                        "m" (*_L_pvalue1), "r" (_L_pvalue1),  "0" (_L_value2) )

    46 # endif

    47 

    48 

    49 #  define _STLP_ATOMIC_EXCHANGE(__pvalue1, __value2) \

    50  ({  register volatile __stl_atomic_t *_L_pvalue1 = __pvalue1; \

    51      register __stl_atomic_t _L_value1, _L_value2 =  __value2 ; \

    52      do { _L_value1 = *_L_pvalue1; _STLP_EXCH_ASM; } while ( _L_value1 != _L_value2 ) ; \

    53      _L_value1; })

    54 

    55 #  define _STLP_ATOMIC_INCREMENT(__pvalue1) \

    56  ({  register volatile __stl_atomic_t *_L_pvalue1 = __pvalue1; \

    57     register __stl_atomic_t _L_value1, _L_value2; \

    58     do { _L_value1 = *_L_pvalue1;  _L_value2 = _L_value1+1; _STLP_EXCH_ASM; } while ( _L_value1 != _L_value2 ) ; \

    59     (_L_value2 + 1); })

    60 

    61 #  define _STLP_ATOMIC_DECREMENT(__pvalue1) \

    62  ({  register volatile __stl_atomic_t *_L_pvalue1 = __pvalue1; \

    63     register __stl_atomic_t _L_value1, _L_value2; \

    64     do { _L_value1 = *_L_pvalue1;  _L_value2 = _L_value1-1; _STLP_EXCH_ASM; } while ( _L_value1 != _L_value2 ) ; \

    65     (_L_value2 - 1); })

    66 

    67 # elif ! defined (_STLP_NO_EXTERN_INLINE)

    68 

    69 extern "C" __stl_atomic_t _STLP_atomic_exchange(__stl_atomic_t * __x, __stl_atomic_t __v);

    70 extern "C" void _STLP_atomic_decrement(__stl_atomic_t* i);

    71 extern "C" void _STLP_atomic_increment(__stl_atomic_t* i);

    72 

    73 #  define _STLP_ATOMIC_INCREMENT(__x)           _STLP_atomic_increment((__stl_atomic_t*)__x)

    74 #  define _STLP_ATOMIC_DECREMENT(__x)           _STLP_atomic_decrement((__stl_atomic_t*)__x)

    75 #  define _STLP_ATOMIC_EXCHANGE(__x, __y)       _STLP_atomic_exchange((__stl_atomic_t*)__x, (__stl_atomic_t)__y)

    76 

    77 # endif

    78