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 /** GUIX Component                                                        */
16 /**                                                                       */
17 /**   System Management (System)                                          */
18 /**                                                                       */
19 /**************************************************************************/
20 
21 #define GX_SOURCE_CODE
22 
23 
24 /* Include necessary system files.  */
25 
26 #include "gx_api.h"
27 #include "gx_system.h"
28 
29 /**************************************************************************/
30 /*                                                                        */
31 /*  FUNCTION                                               RELEASE        */
32 /*                                                                        */
33 /*    _gx_system_event_fold                               PORTABLE C      */
34 /*                                                           6.1          */
35 /*  AUTHOR                                                                */
36 /*                                                                        */
37 /*    Kenneth Maxwell, Microsoft Corporation                              */
38 /*                                                                        */
39 /*  DESCRIPTION                                                           */
40 /*                                                                        */
41 /*    This service folds GUIX events.                                     */
42 /*                                                                        */
43 /*  INPUT                                                                 */
44 /*                                                                        */
45 /*    event                                 Pointer to event              */
46 /*                                                                        */
47 /*  OUTPUT                                                                */
48 /*                                                                        */
49 /*    status                                Completion status             */
50 /*                                                                        */
51 /*  CALLS                                                                 */
52 /*                                                                        */
53 /*    TX_DISABLE                                                          */
54 /*    TX_RESTORE                                                          */
55 /*    _gx_system_pen_speed_update                                         */
56 /*    _gx_system_event_send                 Send GUIX events              */
57 /*                                                                        */
58 /*  CALLED BY                                                             */
59 /*                                                                        */
60 /*    GUIX Internal Code                                                  */
61 /*                                                                        */
62 /*  RELEASE HISTORY                                                       */
63 /*                                                                        */
64 /*    DATE              NAME                      DESCRIPTION             */
65 /*                                                                        */
66 /*  05-19-2020     Kenneth Maxwell          Initial Version 6.0           */
67 /*  09-30-2020     Kenneth Maxwell          Modified comment(s),          */
68 /*                                            resulting in version 6.1    */
69 /*                                                                        */
70 /**************************************************************************/
_gx_system_event_fold(GX_EVENT * in_event)71 UINT  _gx_system_event_fold(GX_EVENT *in_event)
72 {
73 #ifdef GX_THREADX_BINDING
74 TX_INTERRUPT_SAVE_AREA
75 
76 GX_EVENT *pEvent;
77 ULONG    *pSrc;
78 TX_QUEUE *pQueue;
79 
80     TX_DISABLE
81 
82     pQueue = &_gx_system_event_queue;
83 
84     if (pQueue -> tx_queue_enqueued)
85     {
86         pSrc =  pQueue -> tx_queue_read;
87 
88         do
89         {
90             pEvent = (GX_EVENT *)pSrc;
91 
92             if (pEvent -> gx_event_type == in_event -> gx_event_type &&
93                 pEvent -> gx_event_target == in_event -> gx_event_target)
94             {
95                 /* we found a matching event, just update the existing event data
96                    rather than posting a new event
97                  */
98 
99                 /* for timer event, update tick count */
100                 if (pEvent -> gx_event_type == GX_EVENT_TIMER)
101                 {
102                     pEvent -> gx_event_payload.gx_event_ulongdata++;
103                 }
104                 else
105                 {
106                     /* for all other event types, just copy payload */
107                     pEvent -> gx_event_payload.gx_event_ulongdata = in_event -> gx_event_payload.gx_event_ulongdata;
108                 }
109                 TX_RESTORE
110 
111                 if (pEvent -> gx_event_type == GX_EVENT_PEN_DRAG)
112                 {
113                     _gx_system_pen_speed_update(&pEvent -> gx_event_payload.gx_event_pointdata);
114                 }
115                 return GX_SUCCESS;
116             }
117 
118             pSrc += pQueue -> tx_queue_message_size;
119 
120             if (pSrc >= pQueue -> tx_queue_end)
121             {
122                 pSrc = pQueue -> tx_queue_start;
123             }
124         } while (pSrc != pQueue->tx_queue_write);
125     }
126 
127     TX_RESTORE
128 
129     /* we didn't find a matching event, so post a new event */
130     return _gx_system_event_send(in_event);
131 #else
132     return(GX_EVENT_FOLD(in_event));
133 #endif
134 }
135 
136