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 /* posix_get_queue_desc PORTABLE C */
34 /* 6.1.7 */
35 /* AUTHOR */
36 /* */
37 /* William E. Lamie, Microsoft Corporation */
38 /* */
39 /* DESCRIPTION */
40 /* */
41 /* This function returns a message queue descriptor pointer of valid */
42 /* message queue */
43 /* */
44 /* INPUT */
45 /* */
46 /* q_ptr message queue pointer */
47 /* */
48 /* OUTPUT */
49 /* */
50 /* q_des message queue descriptor */
51 /* */
52 /* CALLS */
53 /* */
54 /* posix_internal_error Returns a Generic error */
55 /* tx_byte_allocate Allocates bytes */
56 /* */
57 /* CALLED BY */
58 /* */
59 /* POSIX internal Code */
60 /* */
61 /* RELEASE HISTORY */
62 /* */
63 /* DATE NAME DESCRIPTION */
64 /* */
65 /* 06-02-2021 William E. Lamie Initial Version 6.1.7 */
66 /* */
67 /**************************************************************************/
posix_get_queue_des(POSIX_MSG_QUEUE * q_ptr)68 struct mq_des * posix_get_queue_des(POSIX_MSG_QUEUE * q_ptr)
69 {
70
71 struct mq_des *q_des = NULL;
72 VOID *bp;
73
74 /* allocate the system resource allocated by open call. */
75 if( tx_byte_allocate((TX_BYTE_POOL *)&posix_heap_byte_pool, &bp,
76 sizeof(struct mq_des), TX_NO_WAIT))
77 {
78 /* return generic error. */
79 posix_internal_error(100);
80 /* Return error. */
81 return((struct mq_des *)ERROR);
82 }
83 q_des = (struct mq_des *)bp;
84 /* Get message queue data to mq_des structure. */
85 q_des->f_data = q_ptr;
86 return(q_des);
87 }
88
