FreeCalypso > hg > fc-magnetite
annotate src/aci2/bmi/MmiBlkResources.c @ 15:c8bdae60fcb1
changed the generation of *_version.c files to not break on make clean
author | Mychaela Falconia <falcon@freecalypso.org> |
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date | Tue, 27 Sep 2016 04:34:05 +0000 |
parents | 93999a60b835 |
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rev | line source |
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1 /******************************************************************************* |
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2 |
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3 CONDAT (UK) |
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4 |
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5 ******************************************************************************** |
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6 |
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7 This software product is the property of Condat (UK) Ltd and may not be |
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8 disclosed to any third party without the express permission of the owner. |
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9 |
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10 ******************************************************************************** |
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11 |
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12 $Project name: Basic MMI |
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13 $Project code: BMI (6349) |
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14 $Module: PhoneBook |
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15 $File: MmiBlkResources.c |
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16 $Revision: 1.0 |
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17 |
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18 $Author: Condat(UK) |
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19 $Date: 25/10/00 |
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20 |
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21 ******************************************************************************** |
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22 |
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23 Description: |
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24 |
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25 This modules provides, in conjunction with the MmiBlkManager module, |
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26 the resource management facilities for the MMI. |
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27 |
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28 ******************************************************************************** |
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29 |
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30 $History: MmiBlkResources.c |
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31 |
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32 25/10/00 Original Condat(UK) BMI version. |
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33 |
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34 $End |
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35 |
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36 *******************************************************************************/ |
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37 |
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38 |
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39 /******************************************************************************* |
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40 |
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41 Include Files |
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42 |
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43 *******************************************************************************/ |
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44 |
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45 #define ENTITY_MFW |
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46 |
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47 /* includes */ |
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48 #include <string.h> |
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49 #include <stdio.h> |
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50 #include <stdlib.h> |
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51 |
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52 #if defined (NEW_FRAME) |
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53 |
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54 #include "typedefs.h" |
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55 #include "vsi.h" |
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56 #include "pei.h" |
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57 #include "custom.h" |
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58 #include "gsm.h" |
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59 |
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60 #else |
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61 |
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62 #include "STDDEFS.H" |
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63 #include "custom.h" |
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64 #include "gsm.h" |
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65 #include "vsi.h" |
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66 |
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67 #endif |
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68 // #include <malloc.h> |
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69 |
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70 #include "MmiBlkResources.h" |
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71 |
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72 /******************************************************************************* |
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73 |
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74 Local Structures |
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75 |
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76 *******************************************************************************/ |
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77 |
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78 /* Define the control structures used to implement the block resource |
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79 manager |
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80 */ |
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81 #define RESOURCE_MANAGER_KEY 0x00BABE02L |
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82 #define RESOURCE_SEARCH_LIMIT 4 |
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83 |
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84 typedef struct _tBlkEntry_ |
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85 { |
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86 tBlkId BlkId; |
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87 tBlkHandle BlkHandle; |
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88 } tBlkEntry, *pBlkEntry; |
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89 |
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90 typedef struct _tBlkControl_ |
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91 { |
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92 long int BlkKey; |
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93 tBlkHandle BlkBase; |
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94 int BlkLength; |
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95 pBlkEntry BlkStartPtr; |
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96 tBlkHandle BlkMinAddress; |
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97 tBlkHandle BlkMaxAddress; |
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98 } tBlkControl, *pBlkControl; |
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99 |
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100 |
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101 /******************************************************************************* |
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102 |
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103 Private Routines |
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104 |
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105 *******************************************************************************/ |
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106 |
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107 /******************************************************************************* |
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108 |
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109 $Function: ValidBlockResource |
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110 |
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111 $Description: Verifies that the resource indicated by the handle is a valid |
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112 resource. |
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113 |
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114 $Returns: 0 If invalid, non-zero if valid. |
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115 |
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116 $Arguments: BlkRsrc, handle of resource |
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117 |
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118 *******************************************************************************/ |
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119 |
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120 |
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121 static int ValidBlockResource( tBlkHandle BlkRsrc ) |
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122 { |
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123 pBlkControl BlkControl = (pBlkControl) BlkRsrc; |
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124 |
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125 /* Check for non-NULL handle |
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126 */ |
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127 if ( BlkControl == NULL ) |
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128 return 0; |
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129 |
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130 /* Check key has been set up correctly |
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131 */ |
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132 return ( BlkControl->BlkKey == RESOURCE_MANAGER_KEY ); |
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133 } |
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134 |
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135 |
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136 /******************************************************************************* |
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137 |
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138 Public Routines |
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139 |
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140 *******************************************************************************/ |
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141 |
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142 /******************************************************************************* |
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143 |
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144 $Function: mmibr_Initialise |
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145 |
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146 $Description: |
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147 |
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148 The initialisation routine must be called as part of the startup |
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149 phase of the system, it will allocate working space for the block |
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150 handler if required, and will initialise any structures required |
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151 to maintain the corect operation of the functions. This routine |
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152 must be called prior to invocation of any other block resource |
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153 function |
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154 |
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155 $Returns: Handle to a resource block, NULL if unsuccessful |
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156 |
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157 $Arguments: BlkBase, Base address of the block of data relating |
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158 to the resource |
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159 NumEntries, number of entries associated with the resource |
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160 |
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161 *******************************************************************************/ |
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162 |
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163 tBlkHandle mmibr_Initialise( tBlkHandle BlkBase, int NumEntries ) |
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164 { |
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165 pBlkControl Blk; |
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166 int i; |
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167 |
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168 /* As part of the initialisation process, we need to allocate a |
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169 block of memory in which to store the control information |
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170 associated with this block resource manager |
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171 */ |
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172 if ( ( Blk = (pBlkControl) ALLOC_MEMORY( sizeof(tBlkControl) ) ) != NULL ) |
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173 { |
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174 /* Store the things we know straight off |
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175 */ |
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176 Blk->BlkKey = RESOURCE_MANAGER_KEY; |
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177 Blk->BlkBase = BlkBase; |
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178 Blk->BlkLength = NumEntries; |
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179 Blk->BlkStartPtr = (pBlkEntry) BlkBase; |
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180 |
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181 /* In order to detect memory allocations, we scan the list |
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182 of known entries, storing the maximum and minimum addresses |
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183 in the list. This scan allows us to detect when allocated |
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184 memory is being returned, since the address will be outside |
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185 the contiguous memory block we are managing. |
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186 */ |
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187 Blk->BlkMinAddress = Blk->BlkMaxAddress = BlkBase; |
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188 for ( i = 0; i < NumEntries; i++ ) |
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189 { |
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190 if ( Blk->BlkMaxAddress < Blk->BlkStartPtr[i].BlkHandle ) |
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191 Blk->BlkMaxAddress = Blk->BlkStartPtr[i].BlkHandle; |
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192 } |
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193 } |
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194 |
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195 return Blk; |
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196 } |
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197 |
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198 /******************************************************************************* |
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199 |
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200 $Function: mmibr_ShutDown |
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201 |
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202 $Description: |
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203 |
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204 The shutdown function can be called to free any allocations set up |
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205 by the Initialise routine. In a running system this is unlikely to |
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206 be called unless a catastrophic error has occurred and the system |
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207 needs to be restarted. |
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208 |
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209 $Returns: none. |
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210 |
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211 $Arguments: Pointer to a block resource handle (ie ptr to ptr) |
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212 |
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213 *******************************************************************************/ |
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214 |
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215 void mmibr_ShutDown( tBlkHandle *BlkRsrc ) |
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216 { |
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217 /* Only allow the resource manager to be shutdown if the provided |
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218 handle is consistent |
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219 */ |
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220 if ( ValidBlockResource( *BlkRsrc ) ) |
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221 { |
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222 free( *BlkRsrc ); |
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223 *BlkRsrc = NULL; |
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224 } |
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225 } |
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226 |
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227 /******************************************************************************* |
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228 |
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229 $Function: mmibr_Fetch |
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230 |
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231 $Description: |
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232 |
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233 We will adopt a mechanism where each block of data being provided |
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234 will need to be returned to the block resource manager when it |
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235 is no longer being used, this will provide an orthogonal approach |
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236 when dealing with data coming from either ROM or dynamically |
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237 allocated memory. |
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238 |
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239 $Returns: pointer to resource, NULL if unsuccessful |
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240 |
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241 $Arguments: BlkRsrc, resource handle created by mmibr_Initialise |
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242 Id, identifier of the resource to be returned |
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243 |
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244 *******************************************************************************/ |
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245 |
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246 tBlkHandle mmibr_Fetch( tBlkHandle BlkRsrc, tBlkId Id ) |
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247 { |
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248 int Start, End, Search; |
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249 tBlkId CurrentId; |
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250 tBlkHandle SearchPtr; |
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251 |
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252 /* convert the handle and verify it's valid |
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253 */ |
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254 pBlkControl BlkControl = (pBlkControl) BlkRsrc; |
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255 if ( ! ValidBlockResource( BlkRsrc ) ) |
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256 return NULL; |
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257 |
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258 /* When locating a specific entry, we need to search the list of |
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259 ids for one matching the input value. Since the Ids will be |
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260 organised as an ordered list, very important that bit, we can |
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261 perform a simple binary search to locate the items. |
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262 */ |
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263 Start = 0; |
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264 End = BlkControl->BlkLength - 1; |
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265 SearchPtr = NULL; |
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266 do |
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267 { |
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268 /* grab the entry midway between the current start and end |
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269 */ |
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270 Search = Start + ((End - Start) >> 1); |
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271 CurrentId = BlkControl->BlkStartPtr[Search].BlkId; |
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272 |
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273 /* Binary chop the search space |
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274 */ |
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275 if ( CurrentId == Id ) |
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276 { |
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277 /* Found a match, grab handle and terminate search |
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278 */ |
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279 SearchPtr = BlkControl->BlkStartPtr[Search].BlkHandle; |
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280 Start = End; |
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281 } |
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282 else if ( CurrentId > Id ) |
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283 { |
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284 /* Not got a match, but it's not in the top half so move |
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285 the End pointer down |
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286 */ |
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287 End = Search; |
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288 } |
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289 else |
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290 { |
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291 /* Not got a match, but it's not in the bottom half so |
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292 move the Start pointer up |
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293 */ |
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294 Start = Search; |
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295 } |
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296 |
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297 /* when we get down to the last three or four entries, just |
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298 search linearly to solve it, this is generally quicker for |
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299 a small number of entries than continuing the binary chop |
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300 */ |
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301 if ( ( End - Start ) < RESOURCE_SEARCH_LIMIT ) |
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302 { |
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303 /* search quickly through the possibles |
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304 */ |
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305 for ( Search = Start; Search <= End; Search++ ) |
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306 if ( Id == BlkControl->BlkStartPtr[Search].BlkId ) |
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307 SearchPtr = BlkControl->BlkStartPtr[Search].BlkHandle; |
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308 |
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309 /* And terminate the binary chop |
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310 */ |
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311 Start = End; |
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312 } |
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313 |
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314 } while ( Start != End ); |
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315 |
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316 return SearchPtr; |
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317 } |
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318 |
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319 /******************************************************************************* |
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320 |
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321 End of File |
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322 |
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323 *******************************************************************************/ |
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324 |