* process.c (get_mach_timebase_info): Extracted from rb_clock_gettime.
  (rb_clock_gettime): Use get_mach_timebase_info.
  (rb_clock_getres): Support MACH_ABSOLUTE_TIME_BASED_CLOCK_MONOTONIC.



git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@42763 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
* 2013-09-02

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@42764 b2dd03c8-39d4-4d8f-98ff-823fe69b080e