1 /***************************************************************************
2 * Copyright (c) 2024 Microsoft Corporation
3 *
4 * This program and the accompanying materials are made available under the
5 * terms of the MIT License which is available at
6 * https://opensource.org/licenses/MIT.
7 *
8 * SPDX-License-Identifier: MIT
9 **************************************************************************/
10
11
12 /**************************************************************************/
13 /**************************************************************************/
14 /** */
15 /** POSIX wrapper for THREADX */
16 /** */
17 /** */
18 /** */
19 /**************************************************************************/
20 /**************************************************************************/
21
22 /* Include necessary system files. */
23
24 #include "tx_api.h" /* Threadx API */
25 #include "pthread.h" /* Posix API */
26 #include "px_int.h" /* Posix helper functions */
27
28
29 /**************************************************************************/
30 /* */
31 /* FUNCTION RELEASE */
32 /* */
33 /* clock_getres PORTABLE C */
34 /* 6.1.7 */
35 /* AUTHOR */
36 /* */
37 /* William E. Lamie, Microsoft Corporation */
38 /* */
39 /* DESCRIPTION */
40 /* */
41 /* This subroutine returns the Clock resolution of the Threadx real */
42 /* time clock in nanoseconds */
43 /* */
44 /* INPUT */
45 /* */
46 /* clockid_t, tspec */
47 /* */
48 /* OUTPUT */
49 /* */
50 /* error code */
51 /* */
52 /* CALLS */
53 /* */
54 /* */
55 /* CALLED BY */
56 /* */
57 /* Application Code */
58 /* */
59 /* RELEASE HISTORY */
60 /* */
61 /* DATE NAME DESCRIPTION */
62 /* */
63 /* 06-02-2021 William E. Lamie Initial Version 6.1.7 */
64 /* */
65 /**************************************************************************/
clock_getres(clockid_t t,struct timespec * tspec)66 INT clock_getres(clockid_t t, struct timespec * tspec)
67 {
68
69 if(t==CLOCK_REALTIME)
70 {
71 if(tspec) tspec->tv_nsec= NANOSECONDS_IN_CPU_TICK;
72 return(OK);
73 }
74 else return(EINVAL);
75
76 }
77
