1 /* 2 * Copyright (c) 1980 Regents of the University of California. 3 * All rights reserved. The Berkeley software License Agreement 4 * specifies the terms and conditions for redistribution. 5 * 6 * @(#)dtime_.c 5.1 06/07/85 7 */ 8 9 /* 10 * Returns the delta time since the last call to dtime. 11 * 12 * calling sequence: 13 * real time(2) 14 * call dtime(time) 15 * where: 16 * the 2 element array time will receive the user and system 17 * elapsed time since the last call to dtime, or since the start 18 * of execution. 19 * 20 * This routine can be called as function, and returns the sum of 21 * user and system times. The time_array argument must always be given. 22 * 23 * The resolution for all timing is 1/60 second. 24 */ 25 26 #include <sys/types.h> 27 #include <sys/times.h> 28 29 struct tb { float usrtime; float systime; }; 30 31 time_t dutime=0, dstime=0; 32 33 float 34 dtime_(dt) struct tb *dt; 35 { struct tms clock; 36 37 times(&clock); 38 dt->usrtime = (float)(clock.tms_utime - dutime) / 60.0; 39 dt->systime = (float)(clock.tms_stime - dstime) / 60.0; 40 dutime = clock.tms_utime; 41 dstime = clock.tms_stime; 42 return(dt->usrtime + dt->systime); 43 } 44