utility/rtos_compatibility_layers/posix/px_sleep.c


1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91

/***************************************************************************
 * Copyright (c) 2024 Microsoft Corporation
 * Copyright (c) 2026-present Eclipse ThreadX contributors
 *
 * This program and the accompanying materials are made available under the
 * terms of the MIT License which is available at
 * https://opensource.org/licenses/MIT.
 *
 * SPDX-License-Identifier: MIT
 **************************************************************************/


/**************************************************************************/
/**************************************************************************/
/**                                                                       */
/** POSIX wrapper for THREADX                                             */
/**                                                                       */
/**                                                                       */
/**                                                                       */
/**************************************************************************/
/**************************************************************************/

/* Include necessary system files.  */

#include "tx_api.h"    /* Threadx API */
#include "pthread.h"  /* Posix API */
#include "px_int.h"    /* Posix helper functions */


/**************************************************************************/
/*                                                                        */
/*  FUNCTION                                               RELEASE        */
/*                                                                        */
/*  sleep                                                  PORTABLE C     */
/*                                                           6.1.7        */
/*  AUTHOR                                                                */
/*                                                                        */
/*    William E. Lamie, Microsoft Corporation                             */
/*                                                                        */
/*  DESCRIPTION                                                           */
/*                                                                        */
/*    This function shall cause the calling thread to be suspended from   */
/*    execution until either the number of realtime seconds specified by  */
/*    the argument seconds has elapsed                                    */
/*                                                                        */
/*  INPUT                                                                 */
/*                                                                        */
/*   seconds                      Is the number of real-time (as opposed  */
/*                                to CPU-time) seconds to suspend the     */
/*                                calling thread.                         */
/*                                                                        */
/*  OUTPUT                                                                */
/*                                                                        */
/*   number of seconds remaining to sleep                                 */
/*                                A nonzero value indicates sleep was     */
/*                                interrupted. Zero is successful         */
/*                                completion                              */
/*                                                                        */
/*                                                                        */
/*  CALLS                                                                 */
/*                                                                        */
/*    tx_thread_sleep             ThreadX thread sleep service            */
/*                                                                        */
/*  CALLED BY                                                             */
/*                                                                        */
/*    Application Code                                                    */
/*                                                                        */
/**************************************************************************/
UINT sleep(ULONG seconds)
{

UINT temp1, temp2, diff, result;

    temp1 = tx_time_get();
    tx_thread_sleep(seconds * CPU_TICKS_PER_SECOND);
    temp2 = tx_time_get();
    diff = temp2 - temp1;

    if (diff > (seconds * CPU_TICKS_PER_SECOND))
    {
        result = (diff - (seconds * CPU_TICKS_PER_SECOND));
    }
    else
    {
        result = ((seconds * CPU_TICKS_PER_SECOND) - diff);
    }

    return (result/CPU_TICKS_PER_SECOND);

}