1 /*******************************************************************************
2 * Copyright (c) 2020, 2021 IBM Corp. and Ian Craggs
3 *
4 * All rights reserved. This program and the accompanying materials
5 * are made available under the terms of the Eclipse Public License v2.0
6 * and Eclipse Distribution License v1.0 which accompany this distribution.
7 *
8 * The Eclipse Public License is available at
9 * https://www.eclipse.org/legal/epl-2.0/
10 * and the Eclipse Distribution License is available at
11 * http://www.eclipse.org/org/documents/edl-v10.php.
12 *
13 * Contributors:
14 * Ian Craggs - initial implementation
15 *******************************************************************************/
16
17 #include "MQTTTime.h"
18 #include "StackTrace.h"
19
20 #if defined(_WIN32) || defined(_WIN64)
21 #include <windows.h>
22 #elif defined(IOT_LITEOS_ADAPT)
23 #include <time.h>
24 #else
25 #include <unistd.h>
26 #include <sys/time.h>
27 #endif
28 #if defined(IOT_CONNECT)
29 #include "atiny_mqtt_commu.h"
30 #endif
31
MQTTTime_sleep(ELAPSED_TIME_TYPE milliseconds)32 void MQTTTime_sleep(ELAPSED_TIME_TYPE milliseconds)
33 {
34 FUNC_ENTRY;
35 #if defined(_WIN32) || defined(_WIN64)
36 Sleep((DWORD)milliseconds);
37 #else
38 usleep((useconds_t)(milliseconds*1000));
39 #endif
40 FUNC_EXIT;
41 }
42
43 #if defined(_WIN32) || defined(_WIN64)
MQTTTime_start_clock(void)44 START_TIME_TYPE MQTTTime_start_clock(void)
45 {
46 #if WINVER >= _WIN32_WINNT_VISTA
47 return GetTickCount64();
48 #else
49 return GetTickCount();
50 #endif
51 }
52 #elif defined(AIX)
MQTTTime_start_clock(void)53 START_TIME_TYPE MQTTTime_start_clock(void)
54 {
55 struct timespec start;
56 clock_gettime(CLOCK_MONOTONIC, &start);
57 return start;
58 }
59 #else
MQTTTime_start_clock(void)60 START_TIME_TYPE MQTTTime_start_clock(void)
61 {
62 struct timeval start;
63 struct timespec start_ts;
64
65 clock_gettime(CLOCK_MONOTONIC, &start_ts);
66 start.tv_sec = start_ts.tv_sec;
67 start.tv_usec = start_ts.tv_nsec / 1000;
68 return start;
69 }
70 #endif
MQTTTime_now(void)71 START_TIME_TYPE MQTTTime_now(void)
72 {
73 return MQTTTime_start_clock();
74 }
75
76
77 #if defined(_WIN32) || defined(_WIN64)
78 /*
79 * @param t_new most recent time in milliseconds from GetTickCount()
80 * @param t_old older time in milliseconds from GetTickCount()
81 * @return difference in milliseconds
82 */
MQTTTime_difftime(START_TIME_TYPE t_new,START_TIME_TYPE t_old)83 DIFF_TIME_TYPE MQTTTime_difftime(START_TIME_TYPE t_new, START_TIME_TYPE t_old)
84 {
85 #if WINVER >= _WIN32_WINNT_VISTA
86 return (DIFF_TIME_TYPE)(t_new - t_old);
87 #else
88 if (t_old < t_new) /* check for wrap around condition in GetTickCount */
89 return (DIFF_TIME_TYPE)(t_new - t_old);
90 else
91 return (DIFF_TIME_TYPE)((0xFFFFFFFFL - t_old) + 1 + t_new);
92 #endif
93 }
94 #elif defined(AIX)
95 #define assert(a)
MQTTTime_difftime(START_TIME_TYPE t_new,START_TIME_TYPE t_old)96 DIFF_TIME_TYPE MQTTTime_difftime(START_TIME_TYPE t_new, START_TIME_TYPE t_old)
97 {
98 struct timespec result;
99
100 ntimersub(t_new, t_old, result);
101 return (DIFF_TIME_TYPE)((result.tv_sec)*1000L + (result.tv_nsec)/1000000L); /* convert to milliseconds */
102 }
103 #else
MQTTTime_difftime(START_TIME_TYPE t_new,START_TIME_TYPE t_old)104 DIFF_TIME_TYPE MQTTTime_difftime(START_TIME_TYPE t_new, START_TIME_TYPE t_old)
105 {
106 struct timeval result;
107
108 timersub(&t_new, &t_old, &result);
109 return (DIFF_TIME_TYPE)(((DIFF_TIME_TYPE)result.tv_sec)*1000 + ((DIFF_TIME_TYPE)result.tv_usec)/1000); /* convert to milliseconds */
110 }
111 #endif
112
113
MQTTTime_elapsed(START_TIME_TYPE milliseconds)114 ELAPSED_TIME_TYPE MQTTTime_elapsed(START_TIME_TYPE milliseconds)
115 {
116 return (ELAPSED_TIME_TYPE)MQTTTime_difftime(MQTTTime_now(), milliseconds);
117 }
118