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85dad004 DW |
1 | /* |
2 | char id_dtime[] = "@(#)dtime_.c 1.1"; | |
3 | * | |
4 | * Returns the delta time since the last call to dtime. | |
5 | * | |
6 | * calling sequence: | |
7 | * real time(2) | |
8 | * call dtime(time) | |
9 | * where: | |
10 | * the 2 element array time will receive the user and system | |
11 | * elapsed time since the last call to dtime, or since the start | |
12 | * of execution. | |
13 | * | |
14 | * This routine can be called as function, and returns the sum of | |
15 | * user and system times. The time_array argument must always be given. | |
16 | * | |
17 | * The resolution for all timing is 1/60 second. | |
18 | */ | |
19 | ||
20 | #include <sys/types.h> | |
21 | #include <sys/times.h> | |
22 | ||
23 | struct tb { float usrtime; float systime; }; | |
24 | ||
25 | time_t dutime=0, dstime=0; | |
26 | ||
27 | float | |
28 | dtime_(dt) struct tb *dt; | |
29 | { struct tms clock; | |
30 | ||
31 | times(&clock); | |
32 | dt->usrtime = (float)(clock.tms_utime - dutime) / 60.0; | |
33 | dt->systime = (float)(clock.tms_stime - dstime) / 60.0; | |
34 | dutime = clock.tms_utime; | |
35 | dstime = clock.tms_stime; | |
36 | return(dt->usrtime + dt->systime); | |
37 | } |