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 /** ThreadX Component                                                     */
16 /**                                                                       */
17 /**   Thread                                                              */
18 /**                                                                       */
19 /**************************************************************************/
20 /**************************************************************************/
21 
22 
23 #define TX_SOURCE_CODE
24 #define TX_THREAD_SMP_SOURCE_CODE
25 
26 
27 /* Include necessary system files.  */
28 
29 #include "tx_api.h"
30 #include "tx_thread.h"
31 #include "tx_timer.h"
32 
33 
34 /**************************************************************************/
35 /*                                                                        */
36 /*  FUNCTION                                               RELEASE        */
37 /*                                                                        */
38 /*    _tx_thread_smp_current_state_get                  SMP/Linux/GCC     */
39 /*                                                           6.1          */
40 /*  AUTHOR                                                                */
41 /*                                                                        */
42 /*    William E. Lamie, Microsoft Corporation                             */
43 /*                                                                        */
44 /*  DESCRIPTION                                                           */
45 /*                                                                        */
46 /*    This function is gets the current state of the calling core.        */
47 /*                                                                        */
48 /*  INPUT                                                                 */
49 /*                                                                        */
50 /*    None                                                                */
51 /*                                                                        */
52 /*  OUTPUT                                                                */
53 /*                                                                        */
54 /*    None                                                                */
55 /*                                                                        */
56 /*  CALLS                                                                 */
57 /*                                                                        */
58 /*    pthread_self                          Get Linux thread ID           */
59 /*    _tx_linux_mutex_obtain                                              */
60 /*    _tx_linux_mutex_release                                             */
61 /*                                                                        */
62 /*  CALLED BY                                                             */
63 /*                                                                        */
64 /*    ThreadX Components                                                  */
65 /*                                                                        */
66 /*  RELEASE HISTORY                                                       */
67 /*                                                                        */
68 /*    DATE              NAME                      DESCRIPTION             */
69 /*                                                                        */
70 /*  09-30-2020     William E. Lamie         Initial Version 6.1           */
71 /*                                                                        */
72 /**************************************************************************/
_tx_thread_smp_current_state_get(void)73 ULONG  _tx_thread_smp_current_state_get(void)
74 {
75 
76 UINT        core;
77 UINT        i;
78 ULONG       current_state;
79 pthread_t   thread_id;
80 
81 
82     /* Lock Linux mutex.  */
83     _tx_linux_mutex_obtain(&_tx_linux_mutex);
84 
85     /* Default to core 0 for ISRs and initialization.  */
86     core =  0;
87 
88     /* Pickup the currently executing thread ID. */
89     thread_id =  pthread_self();
90 
91     /* Loop through mapping table to find the core running this thread ID.  */
92     for (i = 0; i < TX_THREAD_SMP_MAX_CORES; i++)
93     {
94 
95         /* Does this core match?  */
96         if (_tx_linux_virtual_cores[i].tx_thread_smp_core_mapping_linux_thread_id == thread_id)
97         {
98 
99             /* Yes, we have a match.  */
100             core =  i;
101 
102             /* Get out of loop.  */
103             break;
104         }
105     }
106 
107     /* Pickup the current state.  */
108     current_state =  _tx_thread_system_state[core];
109 
110     /* Unlock linux mutex. */
111     _tx_linux_mutex_release(&_tx_linux_mutex);
112 
113     /* Now return the state for the core.  */
114     return(current_state);
115 }
116 
117 
118 
119