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Max gerrit-no-reply at lists.osmocom.orgReview at https://gerrit.osmocom.org/4367 Expand osmo_gettimeofday() docs Change-Id: I9bc835aea56f5f2fb652bb5ab3405e354ba3b95c Related: OS#2586 --- M src/timer_gettimeofday.c 1 file changed, 7 insertions(+), 1 deletion(-) git pull ssh://gerrit.osmocom.org:29418/libosmocore refs/changes/67/4367/1 diff --git a/src/timer_gettimeofday.c b/src/timer_gettimeofday.c index 1bf714e..4298805 100644 --- a/src/timer_gettimeofday.c +++ b/src/timer_gettimeofday.c @@ -33,7 +33,13 @@ /*! shim around gettimeofday to be able to set the time manually. * To override, set osmo_gettimeofday_override == true and set the desired - * current time in osmo_gettimeofday_override_time. */ + * current time in osmo_gettimeofday_override_time. + * + * N. B: gettimeofday() is affected by discontinuous jumps in the system time + * (e.g., if the system administrator manually changes the system time). + * Hence this should NEVER be used for elapsed time computation. + * Instead, clock_gettime(CLOCK_MONOTONIC, ..) should be used for that (with similar shim if necessary). + */ int osmo_gettimeofday(struct timeval *tv, struct timezone *tz) { if (osmo_gettimeofday_override) { -- To view, visit https://gerrit.osmocom.org/4367 To unsubscribe, visit https://gerrit.osmocom.org/settings Gerrit-MessageType: newchange Gerrit-Change-Id: I9bc835aea56f5f2fb652bb5ab3405e354ba3b95c Gerrit-PatchSet: 1 Gerrit-Project: libosmocore Gerrit-Branch: master Gerrit-Owner: Max <msuraev at sysmocom.de>