Thread: error: invalid use of undefined type ‘struct tms’

  1. #1
    programmer hacker DevZero's Avatar
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    error: invalid use of undefined type ‘struct tms’

    This:
    Code:
    #include <stdio.h>
    #include <sys/time.h>
    #include <time.h>
    
    struct tms tmsBegin,tmsEnd;
    void time_start() { times(&tmsBegin); }
    long time_stop()
    { times(&tmsEnd);
      return ((tmsEnd.tms_utime-tmsBegin.tms_utime)+
              (tmsEnd.tms_stime-tmsBegin.tms_stime))*1000/CLK_TCK;
    }
    
    int main()
    {
    	time_start();
    	for(int t=0; t<1000000; t++)
    	    printf("Test 1: %d\n", t);
    	printf("Result: %ld\n", time_stop());
    }
    I took this code from the Internet, here's the log after trying to copy:
    Code:
    test.c: In function ‘time_start’:
    test.c:6:1: warning: implicit declaration of function ‘times’ [-Wimplicit-function-declaration]
     void time_start() { times(&tmsBegin); }
     ^
    test.c: In function ‘time_stop’:
    test.c:9:3: error: invalid use of undefined type ‘struct tms’
       return ((tmsEnd.tms_utime-tmsBegin.tms_utime)+
       ^
    test.c:9:3: error: invalid use of undefined type ‘struct tms’
    test.c:10:11: error: invalid use of undefined type ‘struct tms’
               (tmsEnd.tms_stime-tmsBegin.tms_stime))*1000/CLK_TCK;
               ^
    test.c:10:11: error: invalid use of undefined type ‘struct tms’

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