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authorPaul Jakma <paul.jakma@sun.com>2006-08-27 06:44:02 +0000
committerPaul Jakma <paul.jakma@sun.com>2006-08-27 06:44:02 +0000
commitdb9c0df934e62835bc09604a7ae7932693b4254a (patch)
tree7e382d6012701e345492756f7716d4f62030e9f8 /ospfd/ospf_nsm.h
parentf0894cf8c323a25053e1f5e82be3ea5d88c2aacb (diff)
[lib] Bug #134: threads should be more robust against backward time jumps
2006-08-25 Paul Jakma <paul.jakma@sun.com> * thread.c: (general) Add support for monotonic clock, it may still jump forward by huge amounts, but should be immune to going backwards. Fixes bug #134. (quagga_gettimeofday_relative_adjust) helper, does what name says - adjusts gettimeofday based relative timer. (quagga_gettimeofday) helper to keep recent_time up to date. (quagga_get_relative) helper, update and getch the relative timer using gettimeofday(). POSIX CLOCK_MONOTONIC is also supported, but the code is not enabled yet nor tested. (quagga_real_stabilised) helper, retrieve absolute time but stabilised so as to never decrease. (quagga_gettime) Exported interface, analogous to POSIX clock_gettime() in interface, supporting several clocks. (quagga_time) Exported interface, analogous to traditional time(), will never decrease. (recent_relative_time) Convenience function to retrieve relative_time timeval, similar to existing recent_time absolute timeval, for when an approximately recent value will do. (remainder) Update to use above helpers. (thread_getrusage) Previously was a macro, but needs to be a function to twiddle with thread.c private stuff. * thread.c: Point the GETRUSAGE macro at previous function. Export quagga_gettime, quagga_time and recent_relative_time for general use.
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