/**
 * Atomic add
 */


template <typename ValueT>
inline ValueT add_and_fetch(volatile ValueT *ptr, ValueT val);

template <>
inline uint64_t add_and_fetch(volatile uint64_t *ptr, uint64_t val)
{
#if LEVELDB_IS_SOLARIS
    return atomic_add_64_nv(ptr, val);
#else
    return __sync_add_and_fetch(ptr, val);
#endif
}

template <>
inline uint32_t add_and_fetch(volatile uint32_t *ptr, uint32_t val)
{
#if LEVELDB_IS_SOLARIS
    return atomic_add_32_nv(ptr, val);
#else
    return __sync_add_and_fetch(ptr, val);
#endif
}

#if defined(__APPLE__) || defined(__OpenBSD__) || (defined(__s390__) && !defined(__s390x__))
template <>
inline size_t add_and_fetch(volatile size_t *ptr, size_t val)
{
    return __sync_add_and_fetch(ptr, val);
}
#endif
});