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annotate src/g23m-aci/gdd_dio/gdd_sys.h @ 189:d78986760e92

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LICENSE: new terms
author Mychaela Falconia <falcon@freecalypso.org>
date Tue, 14 Apr 2020 20:26:40 +0000
parents d393cd9bb723
children
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1 /*
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2 +-----------------------------------------------------------------------------
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3 | Project : GSM-F&D (8411)
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4 | Modul : gdd_sys.h
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5 +-----------------------------------------------------------------------------
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6 | Copyright 2005 Texas Instruments Berlin, AG
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7 | All rights reserved.
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8 |
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9 | This file is confidential and a trade secret of Texas
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10 | Instruments Berlin, AG
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11 | The receipt of or possession of this file does not convey
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12 | any rights to reproduce or disclose its contents or to
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13 | manufacture, use, or sell anything it may describe, in
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14 | whole, or in part, without the specific written consent of
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15 | Texas Instruments Berlin, AG.
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16 +-----------------------------------------------------------------------------
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17 | Purpose : API for limited system functionality offered to application
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18 | domain libraries.
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19 +-----------------------------------------------------------------------------
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20 */
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21
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22 #ifndef GDD_SYS_H
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23 #define GDD_SYS_H
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24
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25 /*==== DEFINITIONS ==========================================================*/
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26
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27 typedef int T_GDD_SEM;
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28
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29
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30 /*==== DYNAMIC MEMORY FUNCTIONS =============================================*/
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31
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32
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33 /*
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34 +------------------------------------------------------------------------------
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35 | Function : gdd_sys_mem_malloc
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36 +------------------------------------------------------------------------------
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37 | Description : Allocate memory.
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38 |
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39 | Parameters : size - Size of memory required.
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40 |
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41 | Return : Pointer to first byte of allocated memory.
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42 | 0 if allocation failed.
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43 +------------------------------------------------------------------------------
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44 */
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45 void * gdd_sys_mem_malloc(int size);
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46
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47
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48 /*
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49 +------------------------------------------------------------------------------
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50 | Function : gdd_sys_mem_free
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51 +------------------------------------------------------------------------------
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52 | Description : Release memory which was previously allocated.
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53 |
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54 | Parameters : p - Pointer to memory to be deallocated
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55 +------------------------------------------------------------------------------
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56 */
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57 void gdd_sys_mem_free(void * p);
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58
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59
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60 /*==== SEMAPHORE FUNCTIONS ==================================================*/
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61
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62
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63 /*
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64 +------------------------------------------------------------------------------
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65 | Function : gdd_sys_sem_open
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66 +------------------------------------------------------------------------------
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67 | Description : Opens a (counting) semaphore specified by its name. If the
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68 | semaphore does not exist, it will be created with the initial
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69 | count given. If the semaphore already exists the parameter count
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70 | will be ignored.
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71 |
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72 | Parameters : name - Some name to identify the semaphore
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73 | count - initial count (e.g. 1 for a binary sem.)
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74 |
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75 | Return : Returns handle to created semaphore, or -1 if an error occured.
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76 +------------------------------------------------------------------------------
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77 */
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78 T_GDD_SEM gdd_sys_sem_open(char * name, unsigned short count);
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79
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80
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81 /*
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82 +------------------------------------------------------------------------------
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83 | Function : gdd_sys_sem_close
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84 +------------------------------------------------------------------------------
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85 | Description : Closes a semaphore
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86 |
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87 | Parameters : sem - handle of semaphore
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88 |
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89 | Return : 0 = succees
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90 | 1 = error
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91 +------------------------------------------------------------------------------
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92 */
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93 int gdd_sys_sem_close(T_GDD_SEM sem);
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94
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95
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96 /*
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97 +------------------------------------------------------------------------------
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98 | Function : gdd_sys_sem_down
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99 +------------------------------------------------------------------------------
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100 | Description : This functions obtains the specified semaphore, i.e.
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101 | the counter is decremented, if it is greater than zero.
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102 | If the counter is equal to zero, than the calling task is
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103 | suspended until the counter is incremented by another task.
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104 | If the caller is a non-task thread the function returns
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105 | immediately regardless if the request can be satisfied or not.
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106 | In this case, -1 is returned if the counter was already zero.
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107 |
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108 | Parameters : sem - handle of semaphore
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109 |
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110 | Return : 0 = succees
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111 | 1 = error
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112 +------------------------------------------------------------------------------
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113 */
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114 int gdd_sys_sem_down(T_GDD_SEM sem);
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115
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116
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117 /*
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118 +------------------------------------------------------------------------------
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119 | Function : gdd_sys_sem_down
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120 +------------------------------------------------------------------------------
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121 | Description : Releases a semaphore, i.e. counter is incremented.
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122 |
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123 | Parameters : sem - handle of semaphore
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124 |
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125 | Return : 0 = succees
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126 | 1 = error
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127 +------------------------------------------------------------------------------
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128 */
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129 int gdd_sys_sem_up(T_GDD_SEM sem);
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130
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131
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132 /*
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133 +------------------------------------------------------------------------------
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134 | Function : gdd_sys_sem_status
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135 +------------------------------------------------------------------------------
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136 | Description : Query (obtain) the counter of a semaphore.
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137 |
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138 | Parameters : sem - handle of semaphore
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139 | count - output variable to pass back the counter
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140 |
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141 | Return : 0 = succees
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142 | 1 = error
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143 +------------------------------------------------------------------------------
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144 */
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145 int gdd_sys_sem_status(T_GDD_SEM sem, /*out*/ unsigned short * count);
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146
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147
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148 #endif /* GDD_SYS_H */