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| author | Max <msuraev@sysmocom.de> | 2017-10-20 12:48:04 +0200 |
|---|---|---|
| committer | Harald Welte <laforge@gnumonks.org> | 2017-10-23 17:53:11 +0000 |
| commit | 1fa8dfbaf42a4341255b3bbef3c8a3c574e8c477 (patch) | |
| tree | 9e6da064c7cf387e753e9e536344a602d5f6b190 /src/timer_gettimeofday.c | |
| parent | 4b45669761234ff23769c4d376b04b3003d4bea9 (diff) | |
Expand osmo_gettimeofday() docs
Change-Id: I9bc835aea56f5f2fb652bb5ab3405e354ba3b95c
Related: OS#2586
Diffstat (limited to 'src/timer_gettimeofday.c')
| -rw-r--r-- | src/timer_gettimeofday.c | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/src/timer_gettimeofday.c b/src/timer_gettimeofday.c index 1bf714eb..42988053 100644 --- a/src/timer_gettimeofday.c +++ b/src/timer_gettimeofday.c @@ -33,7 +33,13 @@ struct timeval osmo_gettimeofday_override_time = { 23, 424242 }; /*! 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) { |