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 /*    pthread_setcancelstate                              PORTABLE C      */
34 /*                                                           6.1.7        */
35 /*  AUTHOR                                                                */
36 /*                                                                        */
37 /*    William E. Lamie, Microsoft Corporation                             */
38 /*                                                                        */
39 /*  DESCRIPTION                                                           */
40 /*                                                                        */
41 /*    The pthread_setcancelstate()function shall atomically both set the  */
42 /*    calling thread�s cancelability state to the indicated state and  */
43 /*    return the previous cancelability state at the location referenced  */
44 /*    by oldstate.Legal values for state are PTHREAD_CANCEL_ENABLE and    */
45 /*    PTHREAD_CANCEL_DISABLE.                                             */
46 /*                                                                        */
47 /*  INPUT                                                                 */
48 /*                                                                        */
49 /*    state                          New cancelability state to be set    */
50 /*    oldstate                       Pointer to old cancelability state   */
51 /*                                                                        */
52 /*  OUTPUT                                                                */
53 /*                                                                        */
54 /*     0                             if successful                        */
55 /*     Value                         in case of any error                 */
56 /*                                                                        */
57 /*  CALLS                                                                 */
58 /*                                                                        */
59 /*    None                                                                */
60 /*                                                                        */
61 /*  CALLED BY                                                             */
62 /*                                                                        */
63 /*    Application Code                                                    */
64 /*                                                                        */
65 /*  RELEASE HISTORY                                                       */
66 /*                                                                        */
67 /*    DATE              NAME                      DESCRIPTION             */
68 /*                                                                        */
69 /*  06-02-2021     William E. Lamie         Initial Version 6.1.7         */
70 /*                                                                        */
71 /**************************************************************************/
pthread_setcancelstate(INT state,INT * oldstate)72 INT pthread_setcancelstate (INT state, INT *oldstate)
73 {
74 
75 TX_INTERRUPT_SAVE_AREA
76 
77 TX_THREAD     *thread_ptr;
78 POSIX_TCB     *pthread_ptr;
79 
80     /* First check for validity of the new cancel state to be set  */
81     if ( (state  == PTHREAD_CANCEL_ENABLE) || (state == PTHREAD_CANCEL_DISABLE) )
82     {
83         TX_DISABLE
84 
85             /* Get the thread identifier of the currently running thread */
86             thread_ptr = tx_thread_identify();
87             /* get posix TCB for this pthread */
88             pthread_ptr = (POSIX_TCB *)thread_ptr;
89             *oldstate = pthread_ptr->cancel_state;
90             pthread_ptr->cancel_state = state;
91 
92         TX_RESTORE
93 
94         return(OK);
95     }
96     else
97     {
98         posix_errno  = EINVAL;
99         posix_set_pthread_errno(EINVAL);
100         return (EINVAL);
101     }
102 }
103