1 /**************************************************************************/
2 /* */
3 /* Copyright (c) Microsoft Corporation. All rights reserved. */
4 /* */
5 /* This software is licensed under the Microsoft Software License */
6 /* Terms for Microsoft Azure RTOS. Full text of the license can be */
7 /* found in the LICENSE file at https://aka.ms/AzureRTOS_EULA */
8 /* and in the root directory of this software. */
9 /* */
10 /**************************************************************************/
11
12
13 /**************************************************************************/
14 /**************************************************************************/
15 /** */
16 /** POSIX wrapper for THREADX */
17 /** */
18 /** */
19 /** */
20 /**************************************************************************/
21 /**************************************************************************/
22
23 /* Include necessary system files. */
24
25 #include "tx_api.h" /* Threadx API */
26 #include "pthread.h" /* Posix API */
27 #include "px_int.h" /* Posix helper functions */
28
29
30 /**************************************************************************/
31 /* */
32 /* FUNCTION RELEASE */
33 /* */
34 /* sleep PORTABLE C */
35 /* 6.1.7 */
36 /* AUTHOR */
37 /* */
38 /* William E. Lamie, Microsoft Corporation */
39 /* */
40 /* DESCRIPTION */
41 /* */
42 /* This function shall cause the calling thread to be suspended from */
43 /* execution until either the number of realtime seconds specified by */
44 /* the argument seconds has elapsed */
45 /* */
46 /* INPUT */
47 /* */
48 /* seconds Is the number of real-time (as opposed */
49 /* to CPU-time) seconds to suspend the */
50 /* calling thread. */
51 /* */
52 /* OUTPUT */
53 /* */
54 /* number of seconds remaining to sleep */
55 /* A nonzero value indicates sleep was */
56 /* interrupted. Zero is successful */
57 /* completion */
58 /* */
59 /* */
60 /* CALLS */
61 /* */
62 /* tx_thread_sleep ThreadX thread sleep service */
63 /* */
64 /* CALLED BY */
65 /* */
66 /* Application Code */
67 /* */
68 /* RELEASE HISTORY */
69 /* */
70 /* DATE NAME DESCRIPTION */
71 /* */
72 /* 06-02-2021 William E. Lamie Initial Version 6.1.7 */
73 /* */
74 /**************************************************************************/
sleep(ULONG seconds)75 UINT sleep(ULONG seconds)
76 {
77
78 UINT temp1, temp2, diff, result;
79
80 temp1 = tx_time_get();
81 tx_thread_sleep(seconds * CPU_TICKS_PER_SECOND);
82 temp2 = tx_time_get();
83 diff = temp2 - temp1;
84
85 if (diff > (seconds * CPU_TICKS_PER_SECOND))
86 {
87 result = (diff - (seconds * CPU_TICKS_PER_SECOND));
88 }
89 else
90 {
91 result = ((seconds * CPU_TICKS_PER_SECOND) - diff);
92 }
93
94 return (result/CPU_TICKS_PER_SECOND);
95
96 }
97
98
