static VALUE ir_compare_and_set(volatile VALUE self, VALUE expect_value, VALUE new_value) {
#if __ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__ >= 1050
if (OSAtomicCompareAndSwap64(expect_value, new_value, &DATA_PTR(self))) {
return Qtrue;
}
#elif defined(__sun)
/* Assuming VALUE is uintptr_t */
/* Based on the definition of uintptr_t from /usr/include/sys/int_types.h */
#if defined(_LP64) || defined(_I32LPx)
/* 64-bit: uintptr_t === unsigned long */
if (atomic_cas_ulong((uintptr_t *) &DATA_PTR(self), expect_value, new_value)) {
return Qtrue;
}
#else
/* 32-bit: uintptr_t === unsigned int */
if (atomic_cas_uint((uintptr_t *) &DATA_PTR(self), expect_value, new_value)) {
return Qtrue;
}
#endif
#elif defined _MSC_VER && defined _M_AMD64
if (InterlockedCompareExchange64((LONGLONG*)&DATA_PTR(self), new_value, expect_value)) {
return Qtrue;
}
#elif defined _MSC_VER && defined _M_IX86
if (InterlockedCompareExchange((LONG*)&DATA_PTR(self), new_value, expect_value)) {
return Qtrue;
}
#else
if (__sync_bool_compare_and_swap(&DATA_PTR(self), expect_value, new_value)) {
return Qtrue;
}
#endif
return Qfalse;
}
inline bool compare_and_swap(volatile Node*volatile *target, volatile Node *comperand, volatile Node * exchange){
#ifdef _WIN32
return InterlockedCompareExchangePointer((volatile PVOID*)target, (volatile PVOID)exchange, (volatile PVOID)comperand)==comperand;
#else
#ifdef __APPLE__
if (sizeof(exchange)==4) {
return OSAtomicCompareAndSwap32((int32_t)comperand, (int32_t)exchange, (int32_t*)target);
}else {
return OSAtomicCompareAndSwap64((int64_t)comperand, (int64_t)exchange, (int64_t*)target);
}
#else
return __sync_bool_compare_and_swap (target, comperand, exchange);
#endif
#endif
}
