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 /* FUNCTION RELEASE */
32 /* */
33 /* pthread_cond_destroy PORTABLE C */
34 /* 6.1.7 */
35 /* AUTHOR */
36 /* */
37 /* William E. Lamie, Microsoft Corporation */
38 /* */
39 /* DESCRIPTION */
40 /* */
41 /* The pthread_cond_destroy function shall destroy the given condition */
42 /* variable specified by cond; the object becomes, in effect, */
43 /* uninitialized. */
44 /* A destroyed condition variable object can be reinitialized using */
45 /* pthread_cond_init;referencing the object after it has been destroyed*/
46 /* returns error. */
47 /* */
48 /* INPUT */
49 /* */
50 /* cond condition variable object */
51 /* */
52 /* OUTPUT */
53 /* */
54 /* OK If successful */
55 /* EINVAL If error */
56 /* */
57 /* CALLS */
58 /* */
59 /* tx_semaphore_delete Deletes a semaphore internal to */
60 /* to the cond variable */
61 /* */
62 /* CALLED BY */
63 /* */
64 /* Application Code */
65 /* */
66 /* RELEASE HISTORY */
67 /* */
68 /* DATE NAME DESCRIPTION */
69 /* */
70 /* 06-02-2021 William E. Lamie Initial Version 6.1.7 */
71 /* */
72 /**************************************************************************/
pthread_cond_destroy(pthread_cond_t * cond)73 INT pthread_cond_destroy(pthread_cond_t *cond)
74 {
75
76 TX_SEMAPHORE *semaphore_ptr;
77 UINT status;
78
79 if (cond->in_use == TX_FALSE)
80 {
81 posix_errno = EINVAL;
82 posix_set_pthread_errno(EINVAL);
83 return(EINVAL);
84 }
85 else
86 {
87 cond->in_use = TX_FALSE;
88 /* Get the condition variable's internal semaphore. */
89 /* Simply convert the Condition variable control block into a semaphore a cast */
90 semaphore_ptr = (&( cond->cond_semaphore ));
91 status = tx_semaphore_delete(semaphore_ptr);
92 if (status != TX_SUCCESS)
93 {
94 posix_errno = EINVAL;
95 posix_set_pthread_errno(EINVAL);
96 return(EINVAL);
97 }
98 return(OK);
99 }
100 }
101
102
