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Annotation of embedaddon/iperf/src/iperf_time.c, revision 1.1.1.2

1.1       misho       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: {
1.1.1.2 ! misho      92:     return time->secs + time->usecs / 1000000.0;
1.1       misho      93: }
                     94: 
                     95: /* iperf_time_compare
                     96:  *
                     97:  * Compare two timestamps
1.1.1.2 ! misho      98:  *
1.1       misho      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:  */
1.1.1.2 ! misho     124: int
1.1       misho     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;
1.1.1.2 ! misho     135:     }
1.1       misho     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: }