RFR 8017540: Improve multi-threaded contention behavior of BigInteger.toString() radix conversion cache

[Brian Burkhalter]

Branching off from this thread

http://mail.openjdk.java.net/pipermail/core-libs-dev/2013-June/018244.html

I filed this issue (should be public tomorrow)

http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=8017540

for the getRadixConversionCache() enhancement. The patch is here

http://cr.openjdk.java.net/~bpb/8017540/

I reviewed and tested the code for correctness and see no issues, so to speak. This patch cannot be integrated prior to that for 4641897.

Thanks,

Brian