2 * atomic.h: Atomic operations
5 * Dick Porter (dick@ximian.com)
7 * (C) 2002 Ximian, Inc.
8 * Copyright 2012 Xamarin Inc
11 #ifndef _WAPI_ATOMIC_H_
12 #define _WAPI_ATOMIC_H_
14 #if defined(__NetBSD__)
15 #include <sys/param.h>
17 #if __NetBSD_Version__ > 499004000
18 #include <sys/atomic.h>
19 #define HAVE_ATOMIC_OPS
26 #if defined(__WIN32__) || defined(_WIN32)
30 #elif defined(__NetBSD__) && defined(HAVE_ATOMIC_OPS)
32 static inline gint32 InterlockedCompareExchange(volatile gint32 *dest,
33 gint32 exch, gint32 comp)
35 return atomic_cas_32((uint32_t*)dest, comp, exch);
38 static inline gpointer InterlockedCompareExchangePointer(volatile gpointer *dest, gpointer exch, gpointer comp)
40 return atomic_cas_ptr(dest, comp, exch);
43 static inline gint32 InterlockedIncrement(volatile gint32 *val)
45 return atomic_inc_32_nv((uint32_t*)val);
48 static inline gint32 InterlockedDecrement(volatile gint32 *val)
50 return atomic_dec_32_nv((uint32_t*)val);
53 static inline gint32 InterlockedExchange(volatile gint32 *val, gint32 new_val)
55 return atomic_swap_32((uint32_t*)val, new_val);
58 static inline gpointer InterlockedExchangePointer(volatile gpointer *val,
61 return atomic_swap_ptr(val, new_val);
64 static inline gint32 InterlockedExchangeAdd(volatile gint32 *val, gint32 add)
66 return atomic_add_32_nv((uint32_t*)val, add) - add;
69 #elif defined(__i386__) || defined(__x86_64__)
72 * NB: The *Pointer() functions here assume that
73 * sizeof(pointer)==sizeof(gint32)
75 * NB2: These asm functions assume 486+ (some of the opcodes dont
76 * exist on 386). If this becomes an issue, we can get configure to
77 * fall back to the non-atomic C versions of these calls.
80 static inline gint32 InterlockedCompareExchange(volatile gint32 *dest,
81 gint32 exch, gint32 comp)
85 __asm__ __volatile__ ("lock; cmpxchgl %2, %0"
86 : "=m" (*dest), "=a" (old)
87 : "r" (exch), "m" (*dest), "a" (comp));
91 static inline gpointer InterlockedCompareExchangePointer(volatile gpointer *dest, gpointer exch, gpointer comp)
95 __asm__ __volatile__ ("lock; "
96 #if defined(__x86_64__) && !defined(__native_client__)
102 : "=m" (*dest), "=a" (old)
103 : "r" (exch), "m" (*dest), "a" (comp));
108 static inline gint32 InterlockedIncrement(volatile gint32 *val)
112 __asm__ __volatile__ ("lock; xaddl %0, %1"
113 : "=r" (tmp), "=m" (*val)
114 : "0" (1), "m" (*val));
119 static inline gint32 InterlockedDecrement(volatile gint32 *val)
123 __asm__ __volatile__ ("lock; xaddl %0, %1"
124 : "=r" (tmp), "=m" (*val)
125 : "0" (-1), "m" (*val));
132 * http://msdn.microsoft.com/msdnmag/issues/0700/Win32/
133 * for the reasons for using cmpxchg and a loop here.
135 static inline gint32 InterlockedExchange(volatile gint32 *val, gint32 new_val)
139 __asm__ __volatile__ ("1:; lock; cmpxchgl %2, %0; jne 1b"
140 : "=m" (*val), "=a" (ret)
141 : "r" (new_val), "m" (*val), "a" (*val));
145 static inline gpointer InterlockedExchangePointer(volatile gpointer *val,
150 __asm__ __volatile__ ("1:; lock; "
151 #if defined(__x86_64__) && !defined(__native_client__)
157 : "=m" (*val), "=a" (ret)
158 : "r" (new_val), "m" (*val), "a" (*val));
163 static inline gint32 InterlockedExchangeAdd(volatile gint32 *val, gint32 add)
167 __asm__ __volatile__ ("lock; xaddl %0, %1"
168 : "=r" (ret), "=m" (*val)
169 : "0" (add), "m" (*val));
174 #elif (defined(sparc) || defined (__sparc__)) && defined(__GNUC__)
177 static inline gint32 InterlockedCompareExchange(volatile gint32 *_dest, gint32 _exch, gint32 _comp)
179 register volatile gint32 *dest asm("g1") = _dest;
180 register gint32 comp asm("o4") = _comp;
181 register gint32 exch asm("o5") = _exch;
183 __asm__ __volatile__(
184 /* cas [%%g1], %%o4, %%o5 */
187 : "0" (exch), "r" (dest), "r" (comp)
194 static inline gpointer InterlockedCompareExchangePointer(volatile gpointer *_dest, gpointer _exch, gpointer _comp)
196 register volatile gpointer *dest asm("g1") = _dest;
197 register gpointer comp asm("o4") = _comp;
198 register gpointer exch asm("o5") = _exch;
200 __asm__ __volatile__(
202 /* casx [%%g1], %%o4, %%o5 */
205 /* cas [%%g1], %%o4, %%o5 */
209 : "0" (exch), "r" (dest), "r" (comp)
216 static inline gint32 InterlockedIncrement(volatile gint32 *_dest)
218 register volatile gint32 *dest asm("g1") = _dest;
219 register gint32 tmp asm("o4");
220 register gint32 ret asm("o5");
222 __asm__ __volatile__(
223 "1: ld [%%g1], %%o4\n\t"
224 " add %%o4, 1, %%o5\n\t"
225 /* cas [%%g1], %%o4, %%o5 */
226 " .word 0xdbe0500c\n\t"
227 " cmp %%o4, %%o5\n\t"
230 : "=&r" (tmp), "=&r" (ret)
238 static inline gint32 InterlockedDecrement(volatile gint32 *_dest)
240 register volatile gint32 *dest asm("g1") = _dest;
241 register gint32 tmp asm("o4");
242 register gint32 ret asm("o5");
244 __asm__ __volatile__(
245 "1: ld [%%g1], %%o4\n\t"
246 " sub %%o4, 1, %%o5\n\t"
247 /* cas [%%g1], %%o4, %%o5 */
248 " .word 0xdbe0500c\n\t"
249 " cmp %%o4, %%o5\n\t"
252 : "=&r" (tmp), "=&r" (ret)
260 static inline gint32 InterlockedExchange(volatile gint32 *_dest, gint32 exch)
262 register volatile gint32 *dest asm("g1") = _dest;
263 register gint32 tmp asm("o4");
264 register gint32 ret asm("o5");
266 __asm__ __volatile__(
267 "1: ld [%%g1], %%o4\n\t"
269 /* cas [%%g1], %%o4, %%o5 */
270 " .word 0xdbe0500c\n\t"
271 " cmp %%o4, %%o5\n\t"
274 : "=&r" (tmp), "=&r" (ret)
275 : "r" (dest), "r" (exch)
282 static inline gpointer InterlockedExchangePointer(volatile gpointer *_dest, gpointer exch)
284 register volatile gpointer *dest asm("g1") = _dest;
285 register gpointer tmp asm("o4");
286 register gpointer ret asm("o5");
288 __asm__ __volatile__(
290 "1: ldx [%%g1], %%o4\n\t"
292 "1: ld [%%g1], %%o4\n\t"
296 /* casx [%%g1], %%o4, %%o5 */
297 " .word 0xdbf0500c\n\t"
299 /* cas [%%g1], %%o4, %%o5 */
300 " .word 0xdbe0500c\n\t"
302 " cmp %%o4, %%o5\n\t"
305 : "=&r" (tmp), "=&r" (ret)
306 : "r" (dest), "r" (exch)
313 static inline gint32 InterlockedExchangeAdd(volatile gint32 *_dest, gint32 add)
315 register volatile gint32 *dest asm("g1") = _dest;
316 register gint32 tmp asm("o4");
317 register gint32 ret asm("o5");
319 __asm__ __volatile__(
320 "1: ld [%%g1], %%o4\n\t"
321 " add %%o4, %3, %%o5\n\t"
322 /* cas [%%g1], %%o4, %%o5 */
323 " .word 0xdbe0500c\n\t"
324 " cmp %%o4, %%o5\n\t"
326 " add %%o5, %3, %%o5"
327 : "=&r" (tmp), "=&r" (ret)
328 : "r" (dest), "r" (add)
337 InterlockedCompareExchange(volatile gint32 *dest,
338 gint32 exch, gint32 comp)
342 __asm__ __volatile__ ("\tLA\t1,%0\n"
345 : "+m" (*dest), "=&r" (old)
346 : "r" (exch), "r" (comp)
352 static inline gpointer
353 InterlockedCompareExchangePointer(volatile gpointer *dest,
354 gpointer exch, gpointer comp)
358 __asm__ __volatile__ ("\tLA\t1,%0\n"
361 : "+m" (*dest), "=&r" (old)
362 : "r" (exch), "r" (comp)
367 static inline gpointer
368 InterlockedCompareExchangePointer(volatile gpointer *dest,
374 __asm__ __volatile__ ("\tLA\t1,%0\n"
376 "\tCSG\t%1,%2,0(1)\n"
377 : "+m" (*dest), "=&r" (old)
378 : "r" (exch), "r" (comp)
387 InterlockedIncrement(volatile gint32 *val)
391 __asm__ __volatile__ ("\tLA\t2,%1\n"
398 : "=r" (tmp), "+m" (*val)
405 InterlockedIncrement(volatile gint32 *val)
409 __asm__ __volatile__ ("\tLA\t2,%1\n"
416 : "=r" (tmp), "+m" (*val)
425 InterlockedDecrement(volatile gint32 *val)
429 __asm__ __volatile__ ("\tLA\t2,%1\n"
436 : "=r" (tmp), "+m" (*val)
443 InterlockedDecrement(volatile gint32 *val)
447 __asm__ __volatile__ ("\tLA\t2,%1\n"
454 : "=r" (tmp), "+m" (*val)
462 InterlockedExchange(volatile gint32 *val, gint32 new_val)
466 __asm__ __volatile__ ("\tLA\t1,%0\n"
470 : "+m" (*val), "=&r" (ret)
478 static inline gpointer
479 InterlockedExchangePointer(volatile gpointer *val, gpointer new_val)
483 __asm__ __volatile__ ("\tLA\t1,%0\n"
487 : "+m" (*val), "=&r" (ret)
494 static inline gpointer
495 InterlockedExchangePointer(volatile gpointer *val, gpointer new_val)
499 __asm__ __volatile__ ("\tLA\t1,%0\n"
501 "\tCSG\t%1,%2,0(1)\n"
503 : "+m" (*val), "=&r" (ret)
513 InterlockedExchangeAdd(volatile gint32 *val, gint32 add)
517 __asm__ __volatile__ ("\tLA\t2,%1\n"
523 : "=&r" (ret), "+m" (*val)
531 InterlockedExchangeAdd(volatile gint32 *val, gint32 add)
535 __asm__ __volatile__ ("\tLA\t2,%1\n"
541 : "=&r" (ret), "+m" (*val)
549 #elif defined(__mono_ppc__)
551 #ifdef G_COMPILER_CODEWARRIOR
552 static inline gint32 InterlockedIncrement(volatile register gint32 *val)
554 gint32 result = 0, tmp;
555 register gint32 result = 0;
563 stwcx. result, 0, val
570 static inline gint32 InterlockedDecrement(register volatile gint32 *val)
572 register gint32 result = 0;
580 stwcx. result, 0, val
586 #define InterlockedCompareExchangePointer(dest,exch,comp) (void*)InterlockedCompareExchange((volatile gint32 *)(dest), (gint32)(exch), (gint32)(comp))
588 static inline gint32 InterlockedCompareExchange(volatile register gint32 *dest, register gint32 exch, register gint32 comp)
590 register gint32 tmp = 0;
605 static inline gint32 InterlockedExchange(register volatile gint32 *dest, register gint32 exch)
607 register gint32 tmp = 0;
619 #define InterlockedExchangePointer(dest,exch) (void*)InterlockedExchange((volatile gint32 *)(dest), (gint32)(exch))
622 #if defined(__mono_ppc64__) && !defined(__mono_ilp32__)
623 #define LDREGX "ldarx"
624 #define STREGCXD "stdcx."
625 #define CMPREG "cmpd"
627 #define LDREGX "lwarx"
628 #define STREGCXD "stwcx."
629 #define CMPREG "cmpw"
632 static inline gint32 InterlockedIncrement(volatile gint32 *val)
634 gint32 result = 0, tmp;
636 __asm__ __volatile__ ("\n1:\n\t"
637 "lwarx %0, 0, %2\n\t"
639 "stwcx. %1, 0, %2\n\t"
641 : "=&b" (result), "=&b" (tmp): "r" (val): "cc", "memory");
645 static inline gint32 InterlockedDecrement(volatile gint32 *val)
647 gint32 result = 0, tmp;
649 __asm__ __volatile__ ("\n1:\n\t"
650 "lwarx %0, 0, %2\n\t"
651 "addi %1, %0, -1\n\t"
652 "stwcx. %1, 0, %2\n\t"
654 : "=&b" (result), "=&b" (tmp): "r" (val): "cc", "memory");
658 static inline gpointer InterlockedCompareExchangePointer (volatile gpointer *dest,
659 gpointer exch, gpointer comp)
663 __asm__ __volatile__ ("\n1:\n\t"
664 LDREGX " %0, 0, %1\n\t"
667 STREGCXD " %3, 0, %1\n\t"
671 : "b" (dest), "r" (comp), "r" (exch): "cc", "memory");
675 static inline gint32 InterlockedCompareExchange(volatile gint32 *dest,
676 gint32 exch, gint32 comp) {
679 __asm__ __volatile__ ("\n1:\n\t"
680 "lwarx %0, 0, %1\n\t"
683 "stwcx. %3, 0, %1\n\t"
687 : "b" (dest), "r" (comp), "r" (exch): "cc", "memory");
691 static inline gint32 InterlockedExchange(volatile gint32 *dest, gint32 exch)
695 __asm__ __volatile__ ("\n1:\n\t"
696 "lwarx %0, 0, %2\n\t"
697 "stwcx. %3, 0, %2\n\t"
699 : "=r" (tmp) : "0" (tmp), "b" (dest), "r" (exch): "cc", "memory");
703 static inline gpointer InterlockedExchangePointer (volatile gpointer *dest, gpointer exch)
707 __asm__ __volatile__ ("\n1:\n\t"
708 LDREGX " %0, 0, %2\n\t"
709 STREGCXD " %3, 0, %2\n\t"
711 : "=r" (tmp) : "0" (tmp), "b" (dest), "r" (exch): "cc", "memory");
715 static inline gint32 InterlockedExchangeAdd(volatile gint32 *dest, gint32 add)
718 __asm__ __volatile__ ("\n1:\n\t"
719 "lwarx %0, 0, %2\n\t"
721 "stwcx. %1, 0, %2\n\t"
723 : "=&r" (result), "=&r" (tmp)
724 : "r" (dest), "r" (add) : "cc", "memory");
732 #endif /* !G_COMPILER_CODEWARRIOR */
734 #elif defined(__arm__)
737 * Atomic operations on ARM doesn't contain memory barriers, and the runtime code
738 * depends on this, so we add them explicitly.
741 static inline gint32 InterlockedCompareExchange(volatile gint32 *dest, gint32 exch, gint32 comp)
743 #if defined(__ARM_ARCH_6__) || defined(__ARM_ARCH_7A__) || defined(__ARM_ARCH_7__) || defined(__ARM_ARCH_7S__)
745 __asm__ __volatile__ ( "1:\n"
751 "strexeq %0, %4, [%2]\n"
755 : "=&r" (tmp), "=&r" (ret)
756 : "r" (dest), "r" (comp), "r" (exch)
763 __asm__ __volatile__ ( "0:\n\t"
768 "swp %0, %3, [%2]\n\t"
770 "swpne %3, %0, [%2]\n\t"
773 : "=&r" (a), "=&r" (b)
774 : "r" (dest), "r" (exch), "r" (comp)
781 static inline gpointer InterlockedCompareExchangePointer(volatile gpointer *dest, gpointer exch, gpointer comp)
783 #if defined(__ARM_ARCH_6__) || defined(__ARM_ARCH_7A__) || defined(__ARM_ARCH_7__) || defined(__ARM_ARCH_7S__)
785 __asm__ __volatile__ (
792 "strexeq %0, %4, [%2]\n"
796 : "=&r" (tmp), "=&r" (ret)
797 : "r" (dest), "r" (comp), "r" (exch)
804 __asm__ __volatile__ ( "0:\n\t"
809 "swpeq %0, %3, [%2]\n\t"
811 "swpne %3, %0, [%2]\n\t"
814 : "=&r" (a), "=&r" (b)
815 : "r" (dest), "r" (exch), "r" (comp)
822 static inline gint32 InterlockedIncrement(volatile gint32 *dest)
824 #if defined(__ARM_ARCH_6__) || defined(__ARM_ARCH_7A__) || defined(__ARM_ARCH_7__) || defined(__ARM_ARCH_7S__)
826 __asm__ __volatile__ (
831 "strex %1, %0, [%2]\n"
835 : "=&r" (ret), "=&r" (flag)
836 : "r" (dest), "r" (1)
843 __asm__ __volatile__ ( "0:\n\t"
846 "swp %2, %1, [%3]\n\t"
848 "swpne %1, %2, [%3]\n\t"
850 : "=&r" (a), "=&r" (b), "=&r" (c)
851 : "r" (dest), "r" (1)
858 static inline gint32 InterlockedDecrement(volatile gint32 *dest)
860 #if defined(__ARM_ARCH_6__) || defined(__ARM_ARCH_7A__) || defined(__ARM_ARCH_7__) || defined(__ARM_ARCH_7S__)
862 __asm__ __volatile__ (
867 "strex %1, %0, [%2]\n"
871 : "=&r" (ret), "=&r" (flag)
872 : "r" (dest), "r" (1)
879 __asm__ __volatile__ ( "0:\n\t"
882 "swp %2, %1, [%3]\n\t"
884 "swpne %1, %2, [%3]\n\t"
886 : "=&r" (a), "=&r" (b), "=&r" (c)
887 : "r" (dest), "r" (-1)
894 static inline gint32 InterlockedExchange(volatile gint32 *dest, gint32 exch)
896 #if defined(__ARM_ARCH_6__) || defined(__ARM_ARCH_7A__) || defined(__ARM_ARCH_7__) || defined(__ARM_ARCH_7S__)
898 __asm__ __volatile__ (
902 "strex %1, %2, [%3]\n"
906 : "=&r" (ret), "=&r" (flag)
907 : "r" (exch), "r" (dest)
913 __asm__ __volatile__ ( "swp %0, %2, [%1]"
915 : "r" (dest), "r" (exch));
921 static inline gpointer InterlockedExchangePointer(volatile gpointer *dest, gpointer exch)
923 #if defined(__ARM_ARCH_6__) || defined(__ARM_ARCH_7A__) || defined(__ARM_ARCH_7__) || defined(__ARM_ARCH_7S__)
925 __asm__ __volatile__ (
929 "strex %1, %2, [%3]\n"
933 : "=&r" (ret), "=&r" (flag)
934 : "r" (exch), "r" (dest)
940 __asm__ __volatile__ ( "swp %0, %2, [%1]"
942 : "r" (dest), "r" (exch));
948 static inline gint32 InterlockedExchangeAdd(volatile gint32 *dest, gint32 add)
950 #if defined(__ARM_ARCH_6__) || defined(__ARM_ARCH_7A__) || defined(__ARM_ARCH_7__) || defined(__ARM_ARCH_7S__)
951 gint32 ret, tmp, flag;
952 __asm__ __volatile__ (
957 "strex %2, %1, [%3]\n"
961 : "=&r" (ret), "=&r" (tmp), "=&r" (flag)
962 : "r" (dest), "r" (add)
969 __asm__ __volatile__ ( "0:\n\t"
972 "swp %2, %1, [%3]\n\t"
974 "swpne %1, %2, [%3]\n\t"
976 : "=&r" (a), "=&r" (b), "=&r" (c)
977 : "r" (dest), "r" (add)
984 #elif defined(__ia64__)
986 #ifdef __INTEL_COMPILER
987 #include <ia64intrin.h>
990 static inline gint32 InterlockedCompareExchange(gint32 volatile *dest,
991 gint32 exch, gint32 comp)
996 #ifdef __INTEL_COMPILER
997 old = _InterlockedCompareExchange (dest, exch, comp);
999 /* cmpxchg4 zero extends the value read from memory */
1000 real_comp = (guint64)(guint32)comp;
1001 asm volatile ("mov ar.ccv = %2 ;;\n\t"
1002 "cmpxchg4.acq %0 = [%1], %3, ar.ccv\n\t"
1003 : "=r" (old) : "r" (dest), "r" (real_comp), "r" (exch));
1009 static inline gpointer InterlockedCompareExchangePointer(gpointer volatile *dest,
1010 gpointer exch, gpointer comp)
1014 #ifdef __INTEL_COMPILER
1015 old = _InterlockedCompareExchangePointer (dest, exch, comp);
1017 asm volatile ("mov ar.ccv = %2 ;;\n\t"
1018 "cmpxchg8.acq %0 = [%1], %3, ar.ccv\n\t"
1019 : "=r" (old) : "r" (dest), "r" (comp), "r" (exch));
1025 static inline gint32 InterlockedIncrement(gint32 volatile *val)
1027 #ifdef __INTEL_COMPILER
1028 return _InterlockedIncrement (val);
1034 } while (InterlockedCompareExchange (val, old + 1, old) != old);
1040 static inline gint32 InterlockedDecrement(gint32 volatile *val)
1042 #ifdef __INTEL_COMPILER
1043 return _InterlockedDecrement (val);
1049 } while (InterlockedCompareExchange (val, old - 1, old) != old);
1055 static inline gint32 InterlockedExchange(gint32 volatile *dest, gint32 new_val)
1057 #ifdef __INTEL_COMPILER
1058 return _InterlockedExchange (dest, new_val);
1064 } while (InterlockedCompareExchange (dest, new_val, res) != res);
1070 static inline gpointer InterlockedExchangePointer(gpointer volatile *dest, gpointer new_val)
1072 #ifdef __INTEL_COMPILER
1073 return (gpointer)_InterlockedExchange64 ((gint64*)dest, (gint64)new_val);
1079 } while (InterlockedCompareExchangePointer (dest, new_val, res) != res);
1085 static inline gint32 InterlockedExchangeAdd(gint32 volatile *val, gint32 add)
1089 #ifdef __INTEL_COMPILER
1090 old = _InterlockedExchangeAdd (val, add);
1094 } while (InterlockedCompareExchange (val, old + add, old) != old);
1100 #elif defined(__mips__)
1102 #if SIZEOF_REGISTER == 8
1103 #error "Not implemented."
1106 static inline gint32 InterlockedIncrement(volatile gint32 *val)
1108 gint32 tmp, result = 0;
1110 __asm__ __volatile__ (" .set mips32\n"
1116 : "=&r" (result), "=&r" (tmp), "=m" (*val)
1121 static inline gint32 InterlockedDecrement(volatile gint32 *val)
1123 gint32 tmp, result = 0;
1125 __asm__ __volatile__ (" .set mips32\n"
1131 : "=&r" (result), "=&r" (tmp), "=m" (*val)
1136 static inline gint32 InterlockedCompareExchange(volatile gint32 *dest,
1137 gint32 exch, gint32 comp) {
1140 __asm__ __volatile__ (" .set mips32\n"
1147 : "=&r" (old), "=&r" (tmp), "=m" (*dest)
1148 : "m" (*dest), "r" (exch), "r" (comp));
1152 static inline gpointer InterlockedCompareExchangePointer(volatile gpointer *dest, gpointer exch, gpointer comp)
1154 return (gpointer)(InterlockedCompareExchange((volatile gint32 *)(dest), (gint32)(exch), (gint32)(comp)));
1157 static inline gint32 InterlockedExchange(volatile gint32 *dest, gint32 exch)
1161 __asm__ __volatile__ (" .set mips32\n"
1167 : "=&r" (result), "=&r" (tmp), "=m" (*dest)
1168 : "m" (*dest), "r" (exch));
1172 static inline gpointer InterlockedExchangePointer(volatile gpointer *dest, gpointer exch)
1174 return (gpointer)InterlockedExchange((volatile gint32 *)(dest), (gint32)(exch));
1177 static inline gint32 InterlockedExchangeAdd(volatile gint32 *dest, gint32 add)
1181 __asm__ __volatile__ (" .set mips32\n"
1183 " addu %1, %0, %4\n"
1187 : "=&r" (result), "=&r" (tmp), "=m" (*dest)
1188 : "m" (*dest), "r" (add));
1194 #define WAPI_NO_ATOMIC_ASM
1196 extern gint32 InterlockedCompareExchange(volatile gint32 *dest, gint32 exch, gint32 comp);
1197 extern gpointer InterlockedCompareExchangePointer(volatile gpointer *dest, gpointer exch, gpointer comp);
1198 extern gint32 InterlockedIncrement(volatile gint32 *dest);
1199 extern gint32 InterlockedDecrement(volatile gint32 *dest);
1200 extern gint32 InterlockedExchange(volatile gint32 *dest, gint32 exch);
1201 extern gpointer InterlockedExchangePointer(volatile gpointer *dest, gpointer exch);
1202 extern gint32 InterlockedExchangeAdd(volatile gint32 *dest, gint32 add);
1207 #ifdef USE_GCC_ATOMIC_OPS
1209 static inline gint32 InterlockedCompareExchange(volatile gint32 *dest,
1210 gint32 exch, gint32 comp)
1212 return __sync_val_compare_and_swap (dest, comp, exch);
1215 static inline gpointer InterlockedCompareExchangePointer(volatile gpointer *dest, gpointer exch, gpointer comp)
1217 return __sync_val_compare_and_swap (dest, comp, exch);
1220 static inline gint32 InterlockedIncrement(volatile gint32 *val)
1222 return __sync_add_and_fetch (val, 1);
1225 static inline gint32 InterlockedDecrement(volatile gint32 *val)
1227 return __sync_add_and_fetch (val, -1);
1230 static inline gint32 InterlockedExchange(volatile gint32 *val, gint32 new_val)
1235 } while (__sync_val_compare_and_swap (val, old_val, new_val) != old_val);
1239 static inline gpointer InterlockedExchangePointer(volatile gpointer *val,
1245 } while (__sync_val_compare_and_swap (val, old_val, new_val) != old_val);
1249 static inline gint32 InterlockedExchangeAdd(volatile gint32 *val, gint32 add)
1251 return __sync_fetch_and_add (val, add);
1255 #endif /* _WAPI_ATOMIC_H_ */