FreeCalypso > hg > fc-magnetite

annotate src/ui3/bmi/mmiBlkResources.c @ 686:59f07d67eb45

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luna target split into luna1 and luna2 luna1 is FC Luna based on iWOW DSK v4.0 or v5.0 motherboard luna2 is FC Luna based on FC Caramel2 MB
author Mychaela Falconia <falcon@freecalypso.org>
date Mon, 12 Oct 2020 18:51:24 +0000
parents 6a4d9f47793e
children
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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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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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32 25/10/00 Original Condat(UK) BMI version.
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33
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34 $End
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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