Function hdr_atomic_add_fetch_64

deps/hdr_histogram/hdr_atomic.h:59–75

}

static int64_t __inline hdr_atomic_add_fetch_64(volatile int64_t* field, int64_t value)
{
#if defined(_WIN64)
	return _InterlockedExchangeAdd64(field, value) + value;
#else
    int64_t comparand;
    int64_t initial_value = *field;
    do
    {
        comparand = initial_value;
        initial_value = _InterlockedCompareExchange64(field, comparand + value, comparand);
    }
    while (comparand != initial_value);

    return initial_value + value;
#endif
}

static bool __inline hdr_atomic_compare_exchange_64(volatile int64_t* field, int64_t* expected, int64_t desired)
{