RFR (8u) Changed claim count to jint

[Zhengyu Gu]

Oops, pushed.

-Zhengyu

On 10/05/2017 11:41 AM, Aleksey Shipilev wrote:
> On 10/05/2017 05:33 PM, Zhengyu Gu wrote:
>> Changed claim counter from jlong to jint to avoid nasty Atomic::add(jlong, jlong*) bug, which
>> returns old value, instead of updated value (as comment stated).
>>
>> It is unlikely the number of regions can overflow max int, and avoid using jlong, in case of fixing
>> it in future release, that can break us again.
>>
>> http://cr.openjdk.java.net/~zgu/shenandoah/verf_count_jint/webrev.00/
> 
> OK. Thanks for fixing this!
> 
> I'd spell that idiomatically:
> 
>       assert(_heap->num_regions() < (size_t)max_jint, "Too many regions");
> 
> -Aleksey
>