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comparison src/g23m-aci/gdd_dio/gdd_dio_queue.h @ 1:d393cd9bb723

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src/g23m-*: initial import from Magnetite
author Mychaela Falconia <falcon@freecalypso.org>
date Sun, 15 Jul 2018 04:40:46 +0000
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0:b6a5e36de839 1:d393cd9bb723
1 /*
2 +-----------------------------------------------------------------------------
3 | File : gdd_dio_queue.h
4 +-----------------------------------------------------------------------------
5 | Copyright 2002 Texas Instruments Berlin, AG
6 | All rights reserved.
7 |
8 | This file is confidential and a trade secret of Texas
9 | Instruments Berlin, AG
10 | The receipt of or possession of this file does not convey
11 | any rights to reproduce or disclose its contents or to
12 | manufacture, use, or sell anything it may describe, in
13 | whole, or in part, without the specific written consent of
14 | Texas Instruments Berlin, AG.
15 +-----------------------------------------------------------------------------
16 | Purpose : Definitions for gdd_dio_queue.c
17 +-----------------------------------------------------------------------------
18 */
19
20 #ifndef GDD_DIO_QUEUE_H
21 #define GDD_DIO_QUEUE_H
22
23 /*==== INCLUDES =============================================================*/
24
25 #include "gdd.h"
26
27 #include "p_dio.h"
28
29
30 /*==== DEFINITIONS ==========================================================*/
31
32 /**
33 * Maximum numbers of simultaneous DIO buffers provided by PSI.
34 * Might be increased at one stage in the future.
35 */
36 #define GDD_MAX_DIO_BUF 2
37
38 /**
39 * Definition of buffer queue
40 */
41 typedef struct
42 {
43 T_dio_buffer * elems[GDD_MAX_DIO_BUF];
44 U16 next_in;
45 U16 next_out;
46 } T_GDD_BUF_QUEUE;
47
48
49 /*==== EXPORTS ===============================================================*/
50
51 /*
52 +------------------------------------------------------------------------------
53 | Function : gdd_dio_queue_clear
54 +------------------------------------------------------------------------------
55 | Description : Clear a queue
56 |
57 | Parameters : queue - pointer to queue to be cleared
58 |
59 +------------------------------------------------------------------------------
60 */
61 EXTERN void gdd_dio_queue_clear(T_GDD_BUF_QUEUE *queue);
62
63
64 /*
65 +------------------------------------------------------------------------------
66 | Function : gdd_dio_queue_is_empty
67 +------------------------------------------------------------------------------
68 | Description : Check if a queue is empty
69 |
70 | Parameters : queue - pointer to queue to be checked
71 |
72 | Return : TRUE if queue is empty, FALSE otherwise
73 +------------------------------------------------------------------------------
74 */
75 EXTERN BOOL gdd_dio_queue_is_empty(const T_GDD_BUF_QUEUE *queue);
76
77
78 /*
79 +------------------------------------------------------------------------------
80 | Function : gdd_dio_queue_is_full
81 +------------------------------------------------------------------------------
82 | Description : Check if a queue is full
83 |
84 | Parameters : queue - pointer to queue to be checked
85 |
86 | Return : TRUE if queue is full, FALSE otherwise
87 +------------------------------------------------------------------------------
88 */
89 EXTERN BOOL gdd_dio_queue_is_full(const T_GDD_BUF_QUEUE *queue);
90
91
92 /*
93 +------------------------------------------------------------------------------
94 | Function : gdd_dio_enqueue
95 +------------------------------------------------------------------------------
96 | Description : Enqueue an item into the queue
97 |
98 | Parameters : elem - item to be enqueued
99 | queue - pointer to queue to be modified
100 | pos - to return the position of the enqueued item
101 |
102 | Return : TRUE if item is enqueued, FALSE if the queue is already full
103 +------------------------------------------------------------------------------
104 */
105 EXTERN BOOL gdd_dio_enqueue(T_dio_buffer *elem, T_GDD_BUF_QUEUE *queue, /*out*/U16 *pos);
106
107
108 /*
109 +------------------------------------------------------------------------------
110 | Function : gdd_dio_dequeue
111 +------------------------------------------------------------------------------
112 | Description : Dequeue an item into the queue
113 |
114 | Parameters : queue - pointer to queue to be modified
115 | elem - to return the dequeued item
116 |
117 | Return : TRUE if item is dequeued, FALSE if the queue is empty
118 +------------------------------------------------------------------------------
119 */
120 EXTERN BOOL gdd_dio_dequeue(T_GDD_BUF_QUEUE *queue, /*out*/T_dio_buffer **elem);
121
122 /*
123 +------------------------------------------------------------------------------
124 | Function : gdd_dio_queue_peek_next_for_dequeue
125 +------------------------------------------------------------------------------
126 | Description : Retrieves the element that is next to dequeue without actually
127 | dequeuing it.
128 |
129 | Parameters : queue - pointer to queue
130 | pos - position of element
131 | elem - to output element value
132 |
133 | Return : TRUE if item is available, FALSE if the queue is empty
134 +------------------------------------------------------------------------------
135 */
136 EXTERN BOOL gdd_dio_queue_peek_next_for_dequeue
137 (const T_GDD_BUF_QUEUE *queue, T_dio_buffer **elem);
138
139 /*
140 +------------------------------------------------------------------------------
141 | Function : gdd_dio_queue_peek
142 +------------------------------------------------------------------------------
143 | Description : Retrieve element at specified position
144 |
145 | Parameters : queue - pointer to queue
146 | pos - position of element
147 | elem - to output element value
148 |
149 | Attention : This function does not do bounds checking
150 +------------------------------------------------------------------------------
151 */
152 EXTERN void gdd_dio_queue_peek(const T_GDD_BUF_QUEUE *queue, U16 pos, /*out*/T_dio_buffer **elem);
153
154 #endif /* !GDD_DIO_QUEUE_H */
155