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 /* pthread_mutexattr_init PORTABLE C */
34 /* 6.1.7 */
35 /* AUTHOR */
36 /* */
37 /* William E. Lamie, Microsoft Corporation */
38 /* */
39 /* DESCRIPTION */
40 /* */
41 /* This function initializes a pthread mutex attributes object to */
42 /* default values, if the object is already created this call will */
43 /* return an error. */
44 /* */
45 /* INPUT */
46 /* */
47 /* attr Pointer to a mutex attributes */
48 /* */
49 /* OUTPUT */
50 /* */
51 /* 0 If successful */
52 /* Value In case of any error */
53 /* */
54 /* CALLS */
55 /* */
56 /* posix_allocate_pthread_mutexattr Get a new mutexattr object */
57 /* set_default_mutexattr Set mutexattr with default values */
58 /* */
59 /* CALLED BY */
60 /* */
61 /* Application Code */
62 /* */
63 /* RELEASE HISTORY */
64 /* */
65 /* DATE NAME DESCRIPTION */
66 /* */
67 /* 06-02-2021 William E. Lamie Initial Version 6.1.7 */
68 /* */
69 /**************************************************************************/
pthread_mutexattr_init(pthread_mutexattr_t * attr)70 INT pthread_mutexattr_init(pthread_mutexattr_t *attr)
71 {
72
73 TX_INTERRUPT_SAVE_AREA
74
75
76 /* Disable interrupts. */
77 TX_DISABLE
78
79 /* Check this attributes object exists ? */
80 if (attr->in_use == TX_TRUE)
81 {
82 posix_errno = EINVAL;
83 posix_set_pthread_errno(EINVAL);
84 TX_RESTORE
85 return (EINVAL);
86 }
87 attr->in_use = TX_TRUE;
88 set_default_mutexattr(attr);
89 TX_RESTORE
90 return(OK);
91 }
92
