RFR (S): 8211175: Remove temporary clock initialization duplication

David Holmes david.holmes at oracle.com
Tue Oct 2 06:08:06 UTC 2018

webrev: http://cr.openjdk.java.net/~dholmes/8211175/webrev/
bug: https://bugs.openjdk.java.net/browse/JDK-8211175

This cleans up some code duplication between os::Linux and os::Posix. 
os::Posix now exports the necessary clock functions so the Linux code 
can use those.

Also cleaned up the clock_getres syscall as that is already provided via 
the direct clock_getres (no need for a syscall).

Finally, as code in os::Linux already assumed clock_gettime etc was 
always available at build-time (and run-time for that matter) this is 
now explicitly checked via:

+ #error "Build platform doesn't support clock_gettime and related 
+ #endif

Testing: tiers 1-3 (mach5)


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