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 /* pthread_mutexattr_init PORTABLE C */
35 /* 6.1.7 */
36 /* AUTHOR */
37 /* */
38 /* William E. Lamie, Microsoft Corporation */
39 /* */
40 /* DESCRIPTION */
41 /* */
42 /* This function initializes a pthread mutex attributes object to */
43 /* default values, if the object is already created this call will */
44 /* return an error. */
45 /* */
46 /* INPUT */
47 /* */
48 /* attr Pointer to a mutex attributes */
49 /* */
50 /* OUTPUT */
51 /* */
52 /* 0 If successful */
53 /* Value In case of any error */
54 /* */
55 /* CALLS */
56 /* */
57 /* posix_allocate_pthread_mutexattr Get a new mutexattr object */
58 /* set_default_mutexattr Set mutexattr with default values */
59 /* */
60 /* CALLED BY */
61 /* */
62 /* Application Code */
63 /* */
64 /* RELEASE HISTORY */
65 /* */
66 /* DATE NAME DESCRIPTION */
67 /* */
68 /* 06-02-2021 William E. Lamie Initial Version 6.1.7 */
69 /* */
70 /**************************************************************************/
pthread_mutexattr_init(pthread_mutexattr_t * attr)71 INT pthread_mutexattr_init(pthread_mutexattr_t *attr)
72 {
73
74 TX_INTERRUPT_SAVE_AREA
75
76
77 /* Disable interrupts. */
78 TX_DISABLE
79
80 /* Check this attributes object exists ? */
81 if (attr->in_use == TX_TRUE)
82 {
83 posix_errno = EINVAL;
84 posix_set_pthread_errno(EINVAL);
85 TX_RESTORE
86 return (EINVAL);
87 }
88 attr->in_use = TX_TRUE;
89 set_default_mutexattr(attr);
90 TX_RESTORE
91 return(OK);
92 }
93
