88 lines
2.1 KiB
C
88 lines
2.1 KiB
C
/*
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Tis file is part of libcapwap.
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libcapwap is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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libcapwap is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with Foobar. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef __CW_TIMER_H
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#define __CW_TIMER_H
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#include <time.h>
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#include <sys/time.h>
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/**
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* @defgroup TimerFunctions Timer Functions
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* @{
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*/
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/**
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* Start a timer.
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* @param t number of seconds until the timer expires
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* @return timer value to initialize a variable of time_t
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*
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* Example: time_t timer = cw_timer_start(60);
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*/
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#define cw_timer_start(t) (time(NULL)+t)
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/**
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* Check if a timer is expired.
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* @param t an time_t variable intializes by #cw_timer_start
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* @return 0=timer is not expired\n 1=timer is expired.
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*/
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#define cw_timer_timeout(t) (time(NULL)>t ? 1 : 0)
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#define cw_timevaltodouble(tv) \
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(( ((1000000.0)*(double)((tv)->tv_sec) + (double)(tv)->tv_usec)) )
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/**
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* Define a clock variable to measure runtime (not CPU runtime, but
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* real time). This variable can be used with #cw_clock_start
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* and #cw_clock_lap.
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*
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* @param c name of the variable
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*/
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#define DEFINE_CLOCK(c)\
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struct timeval c;
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/**
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* Start the clock (stop watch), start measuring time
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* @param c a pounter to a variable defined with #DEFINE_CLOCK
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*/
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#define cw_clock_start(c)\
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gettimeofday(c,NULL);
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/**
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* Get lap time. (stop watch)
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* @param tv pointer to clock variable defined with #DEFINE_CLOCK
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* @return lap time in seconds.
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*/
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static inline double cw_clock_lap(struct timeval *tv){
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struct timeval lap;
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gettimeofday(&lap,NULL);
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return (cw_timevaltodouble(&lap)-cw_timevaltodouble(tv))/1000000.0;
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}
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/**
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* An alias for #cw_clock_lap
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*/
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#define cw_clock_stop cw_clock_lap
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/** @} */
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#endif
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