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: }
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