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 /* clock_getres PORTABLE C */
35 /* 6.1.7 */
36 /* AUTHOR */
37 /* */
38 /* William E. Lamie, Microsoft Corporation */
39 /* */
40 /* DESCRIPTION */
41 /* */
42 /* This subroutine returns the Clock resolution of the Threadx real */
43 /* time clock in nanoseconds */
44 /* */
45 /* INPUT */
46 /* */
47 /* clockid_t, tspec */
48 /* */
49 /* OUTPUT */
50 /* */
51 /* error code */
52 /* */
53 /* CALLS */
54 /* */
55 /* */
56 /* CALLED BY */
57 /* */
58 /* Application Code */
59 /* */
60 /* RELEASE HISTORY */
61 /* */
62 /* DATE NAME DESCRIPTION */
63 /* */
64 /* 06-02-2021 William E. Lamie Initial Version 6.1.7 */
65 /* */
66 /**************************************************************************/
clock_getres(clockid_t t,struct timespec * tspec)67 INT clock_getres(clockid_t t, struct timespec * tspec)
68 {
69
70 if(t==CLOCK_REALTIME)
71 {
72 if(tspec) tspec->tv_nsec= NANOSECONDS_IN_CPU_TICK;
73 return(OK);
74 }
75 else return(EINVAL);
76
77 }
78
