diff options
Diffstat (limited to 'lib/qtime.h')
| -rw-r--r-- | lib/qtime.h | 64 |
1 files changed, 58 insertions, 6 deletions
diff --git a/lib/qtime.h b/lib/qtime.h index 24c3eb8e..4cfdd1fb 100644 --- a/lib/qtime.h +++ b/lib/qtime.h @@ -88,22 +88,33 @@ qtime2timeval(struct timeval* p_tv, qtime_t qt) ; * * Monotonic Clock * * Using clock_gettime(CLOCK_MONOTONIC, &ts) if it is available, otherwise - * a manufactured equivalent using times(). + * a manufactured equivalent using times() -- see qt_craft_monotonic(). */ Inline qtime_t -qt_get_timeofday(void) ; /* gettimeofday(&tv, NULL) */ - -Inline qtime_t qt_get_realtime(void) ; /* clock_gettime(CLOCK_REALTIME, &ts) */ Inline qtime_t qt_get_monotonic(void) ; /* clock_gettime(CLOCK_MONOTONIC, &ts */ /* OR equivalent using times() */ +Inline qtime_t /* monotonic time from CLOCK_REALTIME */ +qt_realtime2monotonic(qtime_t realtime) ; +Inline qtime_t /* CLOCK_REALTIME from monotonic time */ +qt_monotonic2realtime(qtime_t monotonic) ; + /* Function to manufacture a monotonic clock. */ extern qtime_t qt_craft_monotonic(void) ; +/* These are provided just in case gettimeofday() != CLOCK_REALTIME */ +Inline qtime_t +qt_get_timeofday(void) ; /* gettimeofday(&tv, NULL) */ + +Inline qtime_t /* monotonic time from timeofday */ +qt_timeofday2monotonic(qtime_t timeofday) ; +Inline qtime_t /* timeofday from monotonic time */ +qt_monotonic2timeofday(qtime_t monotonic) ; + /*============================================================================== * Inline conversion functions */ @@ -115,7 +126,8 @@ extern qtime_t qt_craft_monotonic(void) ; Inline qtime_t timespec2qtime(struct timespec* p_ts) { - return ((qtime_t)(p_ts->tv_sec) * QTIME_SECOND) + p_ts->tv_nsec ; + return QTIME(p_ts->tv_sec) + p_ts->tv_nsec ; + confirm(QTIME_SECOND == TIMESPEC_SECOND) ; } ; /* Convert timeval to qtime_t @@ -125,7 +137,8 @@ timespec2qtime(struct timespec* p_ts) Inline qtime_t timeval2qtime(struct timeval* p_tv) { - return ((qtime_t)(p_tv->tv_sec) * QTIME_SECOND) + (p_tv->tv_usec * 1000) ; + return QTIME(p_tv->tv_sec) + (p_tv->tv_usec * 1000) ; + confirm(QTIME_SECOND == TIMEVAL_SECOND * 1000) ; } ; /* Convert qtime_t to timespec @@ -136,8 +149,11 @@ Inline struct timespec* qtime2timespec(struct timespec* p_ts, qtime_t qt) { lldiv_t imd = lldiv(qt, QTIME_SECOND) ; + confirm(sizeof(long long) >= sizeof(qtime_t)) ; + p_ts->tv_sec = imd.quot ; p_ts->tv_nsec = imd.rem ; + confirm(TIMESPEC_SECOND == QTIME_SECOND) ; return p_ts ; } ; @@ -150,8 +166,11 @@ Inline struct timeval* qtime2timeval(struct timeval* p_tv, qtime_t qt) { lldiv_t imd = lldiv(qt, QTIME_SECOND) ; + confirm(sizeof(long long) >= sizeof(qtime_t)) ; + p_tv->tv_sec = imd.quot ; p_tv->tv_usec = imd.rem / 1000 ; + confirm(TIMEVAL_SECOND * 1000 == QTIME_SECOND) ; return p_tv ; } ; @@ -211,4 +230,37 @@ qt_get_monotonic(void) #endif } ; +/*============================================================================== + * Conversion between realtime/timeofday and monotonic + * + */ + +/* Convert a CLOCK_REALTIME time to our local monotonic time. */ +Inline qtime_t +qt_realtime2monotonic(qtime_t realtime) +{ + return qt_get_monotonic() + (realtime - qt_get_realtime()) ; +} ; + +/* Convert a local monotonic time to CLOCK_REALTIME time. */ +Inline qtime_t +qt_monotonic2realtime(qtime_t monotonic) +{ + return qt_get_realtime() + (monotonic - qt_get_monotonic()) ; +} ; + +/* Convert a gettimeofday() time to our local monotonic time. */ +Inline qtime_t +qt_timeofday2monotonic(qtime_t timeofday) +{ + return qt_get_monotonic() + (timeofday - qt_get_timeofday()) ; +} ; + +/* Convert a local monotonic time to gettimeofday() time. */ +Inline qtime_t +qt_monotonic2timeofday(qtime_t monotonic) +{ + return qt_get_timeofday() + (monotonic - qt_get_monotonic()) ; +} ; + #endif /* _ZEBRA_QTIME_H */ |