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_cond_init PORTABLE C */
35 /* 6.1.7 */
36 /* AUTHOR */
37 /* */
38 /* William E. Lamie, Microsoft Corporation */
39 /* */
40 /* DESCRIPTION */
41 /* */
42 /* This function shall initialize the condition variable referenced by */
43 /* cond with attributes referenced by attr. If attr is NULL,the default*/
44 /* condition variable attributes shall be used; the effect is the same */
45 /* as passing the address of a default condition variable attributes */
46 /* object. Upon successful initialization, the state of the condition */
47 /* variable shall become initialized. */
48 /* */
49 /* INPUT */
50 /* */
51 /* Nothing */
52 /* */
53 /* OUTPUT */
54 /* */
55 /* cond condition variable object */
56 /* attr attributes */
57 /* */
58 /* CALLS */
59 /* */
60 /* tx_semaphore_create create a semaphore internal to */
61 /* cond variable */
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_init(pthread_cond_t * cond,pthread_condattr_t * attr)73 INT pthread_cond_init(pthread_cond_t *cond, pthread_condattr_t *attr)
74 {
75
76 TX_SEMAPHORE *semaphore_ptr;
77 UINT status;
78
79 cond->in_use = TX_TRUE;
80 /* Get the condition variable's internal semaphore. */
81 /* Simply convert the COndition variable control block into a semaphore a cast */
82 semaphore_ptr = (&( cond->cond_semaphore ));
83 /* Now create the internal semaphore for this cond variable */
84 status = tx_semaphore_create(semaphore_ptr,"csem",0);
85 if (status != TX_SUCCESS)
86 {
87 posix_errno = EINVAL;
88 posix_set_pthread_errno(EINVAL);
89 return(EINVAL);
90 }
91 else
92 return(OK);
93 }
94
