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 /* sem_destroy PORTABLE C */
34 /* 6.1.7 */
35 /* AUTHOR */
36 /* */
37 /* William E. Lamie, Microsoft Corporation */
38 /* */
39 /* DESCRIPTION */
40 /* */
41 /* This function destroys a nameless semphore */
42 /* Waiting threads will be rescheduled */
43 /* No memory will be released */
44 /* */
45 /* INPUT */
46 /* */
47 /* sem Semaphore pointer */
48 /* */
49 /* OUTPUT */
50 /* */
51 /* EINVAL if error occurs */
52 /* EBUSY if threads were waiting */
53 /* NO_ERROR successful */
54 /* */
55 /* CALLS */
56 /* */
57 /* tx_semaphore_delete deletes actual THreadx semaphore */
58 /* */
59 /* CALLED BY */
60 /* */
61 /* POSIX internal 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 /**************************************************************************/
sem_destroy(sem_t * sem)70 INT sem_destroy(sem_t *sem)
71 {
72 INT result;
73
74 if((sem==NULL)|| ( sem->in_use == TX_FALSE))
75 {
76 result = EINVAL; /* general error */
77
78 }
79 else
80 {
81 if(sem->sem.tx_semaphore_suspended_count > 0 ) result = EBUSY;
82 else result = NO_ERROR;
83 tx_semaphore_delete(&(sem->sem));
84 sem->in_use = TX_FALSE;
85 }
86
87
88 return result;
89 }
90
