diff options
Diffstat (limited to 'lib/qtime.h')
| -rw-r--r-- | lib/qtime.h | 155 |
1 files changed, 60 insertions, 95 deletions
diff --git a/lib/qtime.h b/lib/qtime.h index df486dfd..577c34a3 100644 --- a/lib/qtime.h +++ b/lib/qtime.h @@ -22,19 +22,12 @@ #ifndef _ZEBRA_QTIME_H #define _ZEBRA_QTIME_H -#include <stdint.h> -#include <stdlib.h> +#include "misc.h" + #include <time.h> #include <sys/time.h> #include <unistd.h> -#include "zassert.h" -#include "config.h" - -#ifndef Inline -#define Inline static inline -#endif - /*============================================================================== * qtime_t -- signed 64-bit integer. * @@ -59,26 +52,22 @@ typedef qtime_t qtime_mono_t ; /* qtime_t value, monotonic time-base */ typedef qtime_t qtime_tod_t ; /* qtime_t value, timeofday time-base... */ /* ...just in case != CLOCK_REALTIME ! */ -/* A qtime_t second 123456789 -- nano-seconds */ -#define QTIME_SECOND 1000000000 -#define TIMESPEC_SECOND 1000000000 -#define TIMEVAL_SECOND 1000000 +/* A qtime_t second 123456789 -- nano-seconds */ +#define QTIME_SECOND ((qtime_t)1000000000) +#define TIMESPEC_SECOND 1000000000 +#define TIMEVAL_SECOND 1000000 /* Macro to convert time in seconds to a qtime_t */ /* Note that the time to convert may be a float. */ #define QTIME(s) ((qtime_t)((s) * (qtime_t)QTIME_SECOND)) -Inline qtime_t -timespec2qtime(struct timespec* p_ts) ; - -Inline qtime_t -timeval2qtime(struct timeval* p_tv) ; - -Inline struct timespec* -qtime2timespec(struct timespec* p_ts, qtime_t qt) ; - -Inline struct timeval* -qtime2timeval(struct timeval* p_tv, qtime_t qt) ; +/*============================================================================== + * Conversion functions + */ +Inline qtime_t timespec2qtime(struct timespec* p_ts) ; +Inline qtime_t timeval2qtime(struct timeval* p_tv) ; +Inline struct timespec* qtime2timespec(struct timespec* p_ts, qtime_t qt) ; +Inline struct timeval* qtime2timeval(struct timeval* p_tv, qtime_t qt) ; /*============================================================================== * Clocks. @@ -97,47 +86,40 @@ qtime2timeval(struct timeval* p_tv, qtime_t qt) ; * a manufactured equivalent using times() -- see qt_craft_monotonic(). */ -Inline qtime_real_t -qt_get_realtime(void) ; /* clock_gettime(CLOCK_REALTIME, ...) */ - -Inline qtime_mono_t -qt_add_realtime(qtime_t interval) ; /* qt_get_realtime() + interval */ +Inline qtime_real_t qt_get_realtime(void) ; + /* clock_gettime(CLOCK_REALTIME, ...) */ +Inline qtime_mono_t qt_add_realtime(qtime_t interval) ; + /* qt_get_realtime() + interval */ -Inline qtime_mono_t -qt_get_monotonic(void) ; /* clock_gettime(CLOCK_MONOTONIC, ...) */ +Inline qtime_mono_t qt_get_monotonic(void) ; + /* clock_gettime(CLOCK_MONOTONIC, ...) */ /* OR equivalent using times() */ -Inline qtime_mono_t -qt_add_monotonic(qtime_t interval) ; /* qt_get_monotonic() + interval */ +Inline qtime_mono_t qt_add_monotonic(qtime_t interval) ; + /* qt_get_monotonic() + interval */ Inline time_t qt_get_mono_secs(void) ; /* clock_gettime(CLOCK_MONOTONIC, ...) */ /* OR equivalent using times() */ -Inline qtime_mono_t /* monotonic time from CLOCK_REALTIME */ -qt_realtime2monotonic(qtime_real_t realtime) ; -Inline qtime_real_t /* CLOCK_REALTIME from monotonic time */ -qt_monotonic2realtime(qtime_mono_t monotonic) ; - -/* Function to manufacture a monotonic clock. */ -extern qtime_mono_t qt_craft_monotonic(void) ; -extern time_t qt_craft_mono_secs(void) ; - /* These are provided just in case gettimeofday() != CLOCK_REALTIME */ -Inline qtime_tod_t -qt_get_timeofday(void) ; /* gettimeofday(&tv, NULL) */ - -Inline qtime_tod_t -qt_add_timeofday(qtime_t interval) ; /* qt_get_timeofday() + interval */ +Inline qtime_tod_t qt_get_timeofday(void) ; + /* gettimeofday(&tv, NULL) */ +Inline qtime_tod_t qt_add_timeofday(qtime_t interval) ; + /* qt_get_timeofday() + interval */ -Inline qtime_mono_t /* monotonic time from timeofday */ -qt_timeofday2monotonic(qtime_tod_t timeofday) ; -Inline qtime_tod_t /* timeofday from monotonic time */ -qt_monotonic2timeofday(qtime_mono_t monotonic) ; +/*============================================================================== + * Primitive random number generation. + * + * Uses time and other stuff to produce something which is not particularly + * predictable. + */ +extern uint32_t qt_random(uint32_t seed) ; /*============================================================================== * Inline conversion functions */ -/* Convert timespec to qtime_t +/*------------------------------------------------------------------------------ + * Convert timespec to qtime_t * * Returns qtime_t value. */ @@ -148,7 +130,8 @@ timespec2qtime(struct timespec* p_ts) confirm(QTIME_SECOND == TIMESPEC_SECOND) ; } ; -/* Convert timeval to qtime_t +/*------------------------------------------------------------------------------ + * Convert timeval to qtime_t * * Returns qtime_t value. */ @@ -159,7 +142,8 @@ timeval2qtime(struct timeval* p_tv) confirm(QTIME_SECOND == TIMEVAL_SECOND * 1000) ; } ; -/* Convert qtime_t to timespec +/*------------------------------------------------------------------------------ + * Convert qtime_t to timespec * * Takes address of struct timespec and returns that address. */ @@ -176,7 +160,8 @@ qtime2timespec(struct timespec* p_ts, qtime_t qt) return p_ts ; } ; -/* Convert timespec to qtime_t +/*------------------------------------------------------------------------------ + * Convert timespec to qtime_t * * Takes address of struct timespec and returns that address. */ @@ -197,7 +182,12 @@ qtime2timeval(struct timeval* p_tv, qtime_t qt) * Inline Clock Functions. */ -/* Read given clock & return a qtime_t value. +/* Function to manufacture a monotonic clock. */ +Private qtime_mono_t qt_craft_monotonic(void) ; +Private time_t qt_craft_mono_secs(void) ; + +/*------------------------------------------------------------------------------ + * Read given clock & return a qtime_t value. * * While possibility of error is essentially theoretical, must treat it as a * FATAL error -- cannot continue with broken time value ! @@ -214,7 +204,8 @@ qt_clock_gettime(clockid_t clock_id) return timespec2qtime(&ts) ; } ; -/* clock_gettime(CLOCK_REALTIME, ...) -- returning qtime_t value +/*------------------------------------------------------------------------------ + * clock_gettime(CLOCK_REALTIME, ...) -- returning qtime_t value * * While possibility of error is essentially theoretical, must treat it as a * FATAL error -- cannot continue with broken time value ! @@ -225,7 +216,8 @@ qt_get_realtime(void) return qt_clock_gettime(CLOCK_REALTIME) ; } ; -/* qt_get_realtime() + interval +/*------------------------------------------------------------------------------ + * qt_get_realtime() + interval */ Inline qtime_real_t qt_add_realtime(qtime_t interval) @@ -233,7 +225,8 @@ qt_add_realtime(qtime_t interval) return qt_get_realtime() + interval; } ; -/* clock_gettime(CLOCK_MONOTONIC, ...) OR qt_craft_monotonic() +/*------------------------------------------------------------------------------ + * clock_gettime(CLOCK_MONOTONIC, ...) OR qt_craft_monotonic() * -- returning qtime_t value * * While possibility of error is essentially theoretical, must treat it as a @@ -249,7 +242,8 @@ qt_get_monotonic(void) #endif } ; -/* qt_get_monotonic() + interval +/*------------------------------------------------------------------------------ + * qt_get_monotonic() + interval */ Inline qtime_mono_t qt_add_monotonic(qtime_t interval) @@ -257,7 +251,8 @@ qt_add_monotonic(qtime_t interval) return qt_get_monotonic() + interval; } ; -/* clock_gettime(CLOCK_MONOTONIC, ...) OR qt_craft_monotonic() +/*------------------------------------------------------------------------------ + * clock_gettime(CLOCK_MONOTONIC, ...) OR qt_craft_monotonic() * -- returning time_t value * * Value returned is in seconds -- for coarser grain timings. @@ -280,7 +275,8 @@ qt_get_mono_secs(void) #endif } ; -/* gettimeofday(&tv, NULL) -- returning qtime_t value +/*------------------------------------------------------------------------------ + * gettimeofday(&tv, NULL) -- returning qtime_t value */ Inline qtime_tod_t qt_get_timeofday(void) @@ -290,7 +286,8 @@ qt_get_timeofday(void) return timeval2qtime(&tv) ; } -/* qt_get_timeofday() + interval +/*------------------------------------------------------------------------------ + * qt_get_timeofday() + interval */ Inline qtime_tod_t qt_add_timeofday(qtime_t interval) @@ -298,36 +295,4 @@ qt_add_timeofday(qtime_t interval) return qt_get_timeofday() + interval; } ; -/*============================================================================== - * Conversion between realtime/timeofday and monotonic - */ - -/* Convert a CLOCK_REALTIME time to our local monotonic time. */ -Inline qtime_mono_t -qt_realtime2monotonic(qtime_real_t realtime) -{ - return qt_get_monotonic() + (realtime - qt_get_realtime()) ; -} ; - -/* Convert a local monotonic time to CLOCK_REALTIME time. */ -Inline qtime_real_t -qt_monotonic2realtime(qtime_mono_t monotonic) -{ - return qt_get_realtime() + (monotonic - qt_get_monotonic()) ; -} ; - -/* Convert a gettimeofday() time to our local monotonic time. */ -Inline qtime_mono_t -qt_timeofday2monotonic(qtime_tod_t timeofday) -{ - return qt_get_monotonic() + (timeofday - qt_get_timeofday()) ; -} ; - -/* Convert a local monotonic time to gettimeofday() time. */ -Inline qtime_tod_t -qt_monotonic2timeofday(qtime_mono_t monotonic) -{ - return qt_get_timeofday() + (monotonic - qt_get_monotonic()) ; -} ; - #endif /* _ZEBRA_QTIME_H */ |