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iperf 3.3.9

    1: /*
    2:  * iperf, Copyright (c) 2014-2018, The Regents of the University of
    3:  * California, through Lawrence Berkeley National Laboratory (subject
    4:  * to receipt of any required approvals from the U.S. Dept. of
    5:  * Energy).  All rights reserved.
    6:  *
    7:  * If you have questions about your rights to use or distribute this
    8:  * software, please contact Berkeley Lab's Technology Transfer
    9:  * Department at TTD@lbl.gov.
   10:  *
   11:  * NOTICE.  This software is owned by the U.S. Department of Energy.
   12:  * As such, the U.S. Government has been granted for itself and others
   13:  * acting on its behalf a paid-up, nonexclusive, irrevocable,
   14:  * worldwide license in the Software to reproduce, prepare derivative
   15:  * works, and perform publicly and display publicly.  Beginning five
   16:  * (5) years after the date permission to assert copyright is obtained
   17:  * from the U.S. Department of Energy, and subject to any subsequent
   18:  * five (5) year renewals, the U.S. Government is granted for itself
   19:  * and others acting on its behalf a paid-up, nonexclusive,
   20:  * irrevocable, worldwide license in the Software to reproduce,
   21:  * prepare derivative works, distribute copies to the public, perform
   22:  * publicly and display publicly, and to permit others to do so.
   23:  *
   24:  * This code is distributed under a BSD style license, see the LICENSE
   25:  * file for complete information.
   26:  */
   27: 
   28: 
   29: #include <stddef.h>
   30: 
   31: #include "iperf_config.h"
   32: #include "iperf_time.h"
   33: 
   34: #ifdef HAVE_CLOCK_GETTIME
   35: 
   36: #include <time.h>
   37: 
   38: int
   39: iperf_time_now(struct iperf_time *time1)
   40: {
   41:     struct timespec ts;
   42:     int result;
   43:     result = clock_gettime(CLOCK_MONOTONIC, &ts);
   44:     if (result == 0) {
   45:         time1->secs = (uint32_t) ts.tv_sec;
   46:         time1->usecs = (uint32_t) ts.tv_nsec / 1000;
   47:     }
   48:     return result;
   49: }
   50: 
   51: #else
   52: 
   53: #include <sys/time.h>
   54: 
   55: int
   56: iperf_time_now(struct iperf_time *time1)
   57: {
   58:     struct timeval tv;
   59:     int result;
   60:     result = gettimeofday(&tv, NULL);
   61:     time1->secs = tv.tv_sec;
   62:     time1->usecs = tv.tv_usec;
   63:     return result;
   64: }
   65: 
   66: #endif
   67: 
   68: /* iperf_time_add_usecs
   69:  *
   70:  * Add a number of microseconds to a iperf_time.
   71:  */
   72: void
   73: iperf_time_add_usecs(struct iperf_time *time1, uint64_t usecs)
   74: {
   75:     time1->secs += usecs / 1000000L;
   76:     time1->usecs += usecs % 1000000L;
   77:     if ( time1->usecs >= 1000000L ) {
   78:         time1->secs += time1->usecs / 1000000L;
   79:         time1->usecs %= 1000000L;
   80:     }
   81: }
   82: 
   83: uint64_t
   84: iperf_time_in_usecs(struct iperf_time *time)
   85: {
   86:     return time->secs * 1000000LL + time->usecs;
   87: }
   88: 
   89: double
   90: iperf_time_in_secs(struct iperf_time *time)
   91: {
   92:     return time->secs + time->usecs / 1000000.0; 
   93: }
   94: 
   95: /* iperf_time_compare
   96:  *
   97:  * Compare two timestamps
   98:  * 
   99:  * Returns -1 if time1 is earlier, 1 if time1 is later,
  100:  * or 0 if the timestamps are equal.
  101:  */
  102: int
  103: iperf_time_compare(struct iperf_time *time1, struct iperf_time *time2)
  104: {
  105:     if (time1->secs < time2->secs)
  106:         return -1;
  107:     if (time1->secs > time2->secs)
  108:         return 1;
  109:     if (time1->usecs < time2->usecs)
  110:         return -1;
  111:     if (time1->usecs > time2->usecs)
  112:         return 1;
  113:     return 0;
  114: }
  115: 
  116: /* iperf_time_diff
  117:  *
  118:  * Calculates the time from time2 to time1, assuming time1 is later than time2.
  119:  * The diff will always be positive, so the return value should be checked
  120:  * to determine if time1 was earlier than time2.
  121:  *
  122:  * Returns 1 if the time1 is less than or equal to time2, otherwise 0.
  123:  */
  124: int 
  125: iperf_time_diff(struct iperf_time *time1, struct iperf_time *time2, struct iperf_time *diff)
  126: {
  127:     int past = 0;
  128:     int cmp = 0;
  129: 
  130:     cmp = iperf_time_compare(time1, time2);
  131:     if (cmp == 0) {
  132:         diff->secs = 0;
  133:         diff->usecs = 0;
  134:         past = 1;
  135:     } 
  136:     else if (cmp == 1) {
  137:         diff->secs = time1->secs - time2->secs;
  138:         diff->usecs = time1->usecs;
  139:         if (diff->usecs < time2->usecs) {
  140:             diff->secs -= 1;
  141:             diff->usecs += 1000000;
  142:         }
  143:         diff->usecs = diff->usecs - time2->usecs;
  144:     } else {
  145:         diff->secs = time2->secs - time1->secs;
  146:         diff->usecs = time2->usecs;
  147:         if (diff->usecs < time1->usecs) {
  148:             diff->secs -= 1;
  149:             diff->usecs += 1000000;
  150:         }
  151:         diff->usecs = diff->usecs - time1->usecs;
  152:         past = 1;
  153:     }
  154: 
  155:     return past;
  156: }