change Init to handle alloc failures and refuse multiple concurrent runs of a thread instance r=dougt a=asa git-svn-id: svn://10.0.0.236/trunk@174283 18797224-902f-48f8-a5cc-f745e15eee43
change Init to handle alloc failures and refuse multiple concurrent runs of a thread instance r=dougt a=asa git-svn-id: svn://10.0.0.236/trunk@174283 18797224-902f-48f8-a5cc-f745e15eee43