FreeCalypso > hg > fc-selenite
annotate src/g23m-aci/gdd_dio/gdd_dio_queue.c @ 40:614668bbbc4f
Nucleus: tmt.s ported over from FreeNucleus by XVilka
author | Mychaela Falconia <falcon@freecalypso.org> |
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date | Tue, 17 Jul 2018 07:55:01 +0000 |
parents | d393cd9bb723 |
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rev | line source |
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1
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1 /* |
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2 +----------------------------------------------------------------------------- |
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3 | File : gdd_dio_queue.c |
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4 +----------------------------------------------------------------------------- |
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5 | Copyright 2002 Texas Instruments Berlin, AG |
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6 | All rights reserved. |
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7 | |
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8 | This file is confidential and a trade secret of Texas |
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9 | Instruments Berlin, AG |
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10 | The receipt of or possession of this file does not convey |
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11 | any rights to reproduce or disclose its contents or to |
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12 | manufacture, use, or sell anything it may describe, in |
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13 | whole, or in part, without the specific written consent of |
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14 | Texas Instruments Berlin, AG. |
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15 +----------------------------------------------------------------------------- |
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16 | Purpose : Implements the queue functions for the DIO buffer FIFO |
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17 +----------------------------------------------------------------------------- |
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18 */ |
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19 |
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20 |
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21 #define ENTITY_GDD_DIO |
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22 |
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23 /*==== INCLUDES =============================================================*/ |
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24 |
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25 #include "typedefs.h" /* to get Condat data types */ |
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26 #include "vsi.h" /* to get a lot of macros */ |
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27 |
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28 #include <string.h> /* for memset */ |
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29 |
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30 #include "gdd_dio_queue.h" |
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31 |
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32 /*==== CONST ================================================================*/ |
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33 |
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34 /*==== LOCAL VARS ===========================================================*/ |
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35 |
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36 /*==== PRIVATE FUNCTIONS ====================================================*/ |
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37 |
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38 /*==== PUBLIC FUNCTIONS =====================================================*/ |
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39 |
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40 |
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41 GLOBAL void gdd_dio_queue_clear(T_GDD_BUF_QUEUE *queue) |
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42 { |
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43 queue->next_in = 0; |
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44 queue->next_out = 0; |
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45 memset(queue->elems, 0, sizeof(T_dio_buffer *) * GDD_MAX_DIO_BUF); |
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46 } |
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47 |
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48 |
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49 BOOL gdd_dio_queue_is_empty(const T_GDD_BUF_QUEUE *queue) |
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50 { |
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51 return (queue->next_in == queue->next_out) && |
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52 (0 == queue->elems[queue->next_out]); |
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53 } |
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54 |
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55 |
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56 GLOBAL BOOL gdd_dio_queue_is_full(const T_GDD_BUF_QUEUE *queue) |
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57 { |
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58 return (queue->next_in == queue->next_out) && |
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59 !(0 == queue->elems[queue->next_out]); |
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60 } |
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61 |
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62 |
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63 GLOBAL BOOL gdd_dio_dequeue(T_GDD_BUF_QUEUE *queue, T_dio_buffer **elem) |
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64 { |
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65 if(gdd_dio_queue_is_empty(queue)) |
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66 { |
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67 return FALSE; |
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68 } |
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69 else |
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70 { |
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71 (*elem) = queue->elems[queue->next_out]; |
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72 queue->elems[queue->next_out] = 0; |
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73 ++(queue->next_out); |
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74 if(queue->next_out EQ GDD_MAX_DIO_BUF) |
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75 queue->next_out = 0; |
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76 return TRUE; |
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77 } |
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78 } |
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79 |
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80 GLOBAL BOOL gdd_dio_queue_peek_next_for_dequeue |
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81 (const T_GDD_BUF_QUEUE *queue, /*out*/T_dio_buffer **elem) |
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82 { |
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83 if(gdd_dio_queue_is_empty(queue)) |
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84 { |
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85 return FALSE; |
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86 } |
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87 else |
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88 { |
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89 (*elem) = queue->elems[queue->next_out]; |
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90 return TRUE; |
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91 } |
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92 } |
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93 |
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94 GLOBAL BOOL gdd_dio_enqueue(T_dio_buffer *elem, T_GDD_BUF_QUEUE *queue, /*out*/U16 *pos) |
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95 { |
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96 if(gdd_dio_queue_is_full(queue)) |
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97 { |
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98 return FALSE; |
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99 } |
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100 else |
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101 { |
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102 queue->elems[queue->next_in] = elem; |
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103 (*pos) = queue->next_in; |
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104 ++(queue->next_in); |
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105 if(queue->next_in EQ GDD_MAX_DIO_BUF) |
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106 queue->next_in = 0; |
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107 return TRUE; |
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108 } |
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109 } |
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110 |
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111 |
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112 GLOBAL void gdd_dio_queue_peek(const T_GDD_BUF_QUEUE *queue, U16 pos, /*out*/T_dio_buffer **elem) |
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113 { |
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114 (*elem) = queue->elems[pos]; |
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115 } |