Github user astitcher commented on the pull request:
https://github.com/apache/qpid/pull/7#issuecomment-170631466
As a way to implement clock_gettime() this seems like a good approach.
However the bigger problem is the timekeeping between clock_gettime() and
condition vars need to be the same. So you would either need to reimplement
condvars to use CLOCK_MONOTONIC (SYSTEM_CLOCK?) or go back to using
CLOCK_REALTIME in the OSX port.
The reason we changed to CLOCK_MONOTONIC in the first instance is that
CLOCK_REALTIME can go backwards if the system time is changed and this has bad
effects on qpid. If OSX/Mach CALENDAR_CLOCK can't go backwards then this isn't
important, I expect that, given its name, it can go back though.
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