The Android Open Source Project | 30957f5 | 2008-10-21 07:00:00 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2008 The Android Open Source Project |
| 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
| 15 | */ |
| 16 | |
| 17 | /* ---- includes ----------------------------------------------------------- */ |
| 18 | |
| 19 | #include "b_BasicEm/Functions.h" |
| 20 | #include "b_BasicEm/DynMemManager.h" |
| 21 | #include "b_BasicEm/Context.h" |
| 22 | |
| 23 | /* ------------------------------------------------------------------------- */ |
| 24 | |
| 25 | /* minimum block size dynamically allocated in function nextBlock (affects only shared memory) */ |
| 26 | #define bbs_DYN_MEM_MIN_NEW_BLOCK_SIZE 0 |
| 27 | |
| 28 | /** Offset to actual memory area on allocated memory blocks (in 16-bit words). |
| 29 | * Value needs to be large enough to hold the pointer to the next memory block |
| 30 | * and the size value (32-bit) of the memory area. |
| 31 | */ |
| 32 | #define bbs_MEM_OFFSET 6 |
| 33 | |
| 34 | /* ========================================================================= */ |
| 35 | /* */ |
| 36 | /* ---- \ghd{ auxiliary functions } ---------------------------------------- */ |
| 37 | /* */ |
| 38 | /* ========================================================================= */ |
| 39 | |
| 40 | /* ------------------------------------------------------------------------- */ |
| 41 | |
| 42 | /* ========================================================================= */ |
| 43 | /* */ |
| 44 | /* ---- \ghd{ constructor / destructor } ----------------------------------- */ |
| 45 | /* */ |
| 46 | /* ========================================================================= */ |
| 47 | |
| 48 | /* ------------------------------------------------------------------------- */ |
| 49 | |
| 50 | void bbs_DynMemManager_init( struct bbs_Context* cpA, |
| 51 | struct bbs_DynMemManager* ptrA ) |
| 52 | { |
| 53 | ptrA->memPtrE = NULL; |
| 54 | ptrA->mallocFPtrE = NULL; |
| 55 | ptrA->freeFPtrE = NULL; |
| 56 | } |
| 57 | |
| 58 | /* ------------------------------------------------------------------------- */ |
| 59 | |
| 60 | void bbs_DynMemManager_exit( struct bbs_Context* cpA, |
| 61 | struct bbs_DynMemManager* ptrA ) |
| 62 | { |
| 63 | ptrA->memPtrE = NULL; |
| 64 | ptrA->mallocFPtrE = NULL; |
| 65 | ptrA->freeFPtrE = NULL; |
| 66 | } |
| 67 | |
| 68 | /* ------------------------------------------------------------------------- */ |
| 69 | |
| 70 | /* ========================================================================= */ |
| 71 | /* */ |
| 72 | /* ---- \ghd{ operators } -------------------------------------------------- */ |
| 73 | /* */ |
| 74 | /* ========================================================================= */ |
| 75 | |
| 76 | /* ------------------------------------------------------------------------- */ |
| 77 | |
| 78 | /* ========================================================================= */ |
| 79 | /* */ |
| 80 | /* ---- \ghd{ query functions } -------------------------------------------- */ |
| 81 | /* */ |
| 82 | /* ========================================================================= */ |
| 83 | |
| 84 | /* ------------------------------------------------------------------------- */ |
| 85 | |
| 86 | uint32 bbs_DynMemManager_allocatedSize( struct bbs_Context* cpA, |
| 87 | const struct bbs_DynMemManager* ptrA ) |
| 88 | { |
| 89 | uint32 sizeL = 0; |
| 90 | uint16* pL = ( uint16* )ptrA->memPtrE; |
| 91 | while( pL != NULL ) |
| 92 | { |
| 93 | sizeL += ( ( uint32* )pL )[ 2 ]; |
| 94 | pL = *( uint16** )pL; |
| 95 | } |
| 96 | return sizeL; |
| 97 | } |
| 98 | |
| 99 | /* ------------------------------------------------------------------------- */ |
| 100 | |
| 101 | /* ========================================================================= */ |
| 102 | /* */ |
| 103 | /* ---- \ghd{ modify functions } ------------------------------------------- */ |
| 104 | /* */ |
| 105 | /* ========================================================================= */ |
| 106 | |
| 107 | /* ------------------------------------------------------------------------- */ |
| 108 | |
| 109 | /* ========================================================================= */ |
| 110 | /* */ |
| 111 | /* ---- \ghd{ I/O } -------------------------------------------------------- */ |
| 112 | /* */ |
| 113 | /* ========================================================================= */ |
| 114 | |
| 115 | /* ------------------------------------------------------------------------- */ |
| 116 | |
| 117 | /* ========================================================================= */ |
| 118 | /* */ |
| 119 | /* ---- \ghd{ exec functions } --------------------------------------------- */ |
| 120 | /* */ |
| 121 | /* ========================================================================= */ |
| 122 | |
| 123 | /* ------------------------------------------------------------------------- */ |
| 124 | |
| 125 | uint16* bbs_DynMemManager_alloc( struct bbs_Context* cpA, |
| 126 | struct bbs_DynMemManager* ptrA, |
| 127 | const struct bbs_MemSeg* memSegPtrA, |
| 128 | uint32 sizeA ) |
| 129 | { |
| 130 | uint16* pL = NULL; |
| 131 | bbs_DEF_fNameL( "uint16* bbs_DynMemManager_alloc( struct bbs_DynMemManager* ptrA, uint32 sizeA )" ) |
| 132 | |
| 133 | |
| 134 | if( ptrA->mallocFPtrE == NULL ) |
| 135 | { |
| 136 | bbs_ERROR1( "%s:\n Malloc handler not defined.\n", fNameL ); |
| 137 | return NULL; |
| 138 | } |
| 139 | |
| 140 | if( ptrA->memPtrE == NULL ) |
| 141 | { |
| 142 | ptrA->memPtrE = ptrA->mallocFPtrE( cpA, memSegPtrA, ( sizeA + bbs_MEM_OFFSET ) << 1 ); |
| 143 | pL = ptrA->memPtrE; |
| 144 | } |
| 145 | else |
| 146 | { |
| 147 | uint16** ppL = ( uint16** )ptrA->memPtrE; |
| 148 | while( *ppL != NULL ) ppL = ( uint16** )*ppL; |
| 149 | *ppL = ptrA->mallocFPtrE( cpA, memSegPtrA, ( sizeA + bbs_MEM_OFFSET ) << 1 ); |
| 150 | pL = *ppL; |
| 151 | } |
| 152 | |
| 153 | if( pL == NULL ) |
| 154 | { |
| 155 | bbs_ERR1( bbs_ERR_OUT_OF_MEMORY, "%s:\n Allocation failed.\n", fNameL ); |
| 156 | return NULL; |
| 157 | } |
| 158 | |
| 159 | ( ( uint32* )pL )[ 0 ] = 0; |
| 160 | ( ( uint32* )pL )[ 1 ] = 0; |
| 161 | ( ( uint32* )pL )[ 2 ] = sizeA + bbs_MEM_OFFSET; |
| 162 | |
| 163 | return pL + bbs_MEM_OFFSET; |
| 164 | } |
| 165 | |
| 166 | /* ------------------------------------------------------------------------- */ |
| 167 | |
| 168 | void bbs_DynMemManager_free( struct bbs_Context* cpA, |
| 169 | struct bbs_DynMemManager* ptrA, |
| 170 | uint16* memPtrA ) |
| 171 | { |
| 172 | bbs_DEF_fNameL( "void bbs_DynMemManager_free( .... )" ) |
| 173 | |
| 174 | if( ptrA->memPtrE == NULL ) |
| 175 | { |
| 176 | bbs_ERROR1( "%s:\n Memory was not allocated.\n", fNameL ); |
| 177 | return; |
| 178 | } |
| 179 | else if( ptrA->memPtrE + bbs_MEM_OFFSET == memPtrA ) |
| 180 | { |
| 181 | uint16* memPtrL = ptrA->memPtrE; |
| 182 | ptrA->memPtrE = *( uint16** )ptrA->memPtrE; |
| 183 | ptrA->freeFPtrE( memPtrL ); |
| 184 | } |
| 185 | else |
| 186 | { |
| 187 | uint16* p0L = NULL; |
| 188 | uint16* pL = ( uint16* )ptrA->memPtrE; |
| 189 | |
| 190 | while( pL != NULL ) |
| 191 | { |
| 192 | if( pL + bbs_MEM_OFFSET == memPtrA ) break; |
| 193 | p0L = pL; |
| 194 | pL = *( uint16** )pL; |
| 195 | } |
| 196 | |
| 197 | if( pL != NULL ) |
| 198 | { |
| 199 | if( ptrA->freeFPtrE == NULL ) |
| 200 | { |
| 201 | bbs_ERROR1( "%s:\n Free handler not defined.\n", fNameL ); |
| 202 | return; |
| 203 | } |
| 204 | |
| 205 | if( p0L != NULL ) |
| 206 | { |
| 207 | *( uint16** )p0L = *( uint16** )pL; |
| 208 | } |
| 209 | else |
| 210 | { |
| 211 | ptrA->memPtrE = *( uint16** )pL; |
| 212 | } |
| 213 | |
| 214 | ptrA->freeFPtrE( pL ); |
| 215 | } |
| 216 | else |
| 217 | { |
| 218 | bbs_ERROR1( "%s:\n Attempt to free memory that was not allocated.\n", fNameL ); |
| 219 | return; |
| 220 | } |
| 221 | } |
| 222 | } |
| 223 | |
| 224 | /* ------------------------------------------------------------------------- */ |
| 225 | |
| 226 | uint16* bbs_DynMemManager_nextBlock( struct bbs_Context* cpA, |
| 227 | struct bbs_DynMemManager* ptrA, |
| 228 | const struct bbs_MemSeg* memSegPtrA, |
| 229 | uint16* curBlockPtrA, |
| 230 | uint32 minSizeA, |
| 231 | uint32* actualSizePtrA ) |
| 232 | { |
| 233 | uint16* pL = ( uint16* )ptrA->memPtrE; |
| 234 | bbs_DEF_fNameL( "uint16* bbs_DynMemManager_nextBlock( .... )" ) |
| 235 | |
| 236 | if( curBlockPtrA != NULL ) |
| 237 | { |
| 238 | /* find current block */ |
| 239 | while( pL != NULL ) |
| 240 | { |
| 241 | if( pL + bbs_MEM_OFFSET == curBlockPtrA ) break; |
| 242 | pL = *( uint16** )pL; |
| 243 | } |
| 244 | |
| 245 | if( pL == NULL ) |
| 246 | { |
| 247 | bbs_ERROR1( "%s:\nCould not find current memory block.\n", fNameL ); |
| 248 | *actualSizePtrA = 0; |
| 249 | return NULL; |
| 250 | } |
| 251 | |
| 252 | /* go to next block */ |
| 253 | pL = *( uint16** )pL; |
| 254 | } |
| 255 | |
| 256 | /* find next fitting block */ |
| 257 | while( pL != NULL ) |
| 258 | { |
| 259 | if( ( ( uint32* )pL )[ 2 ] >= minSizeA + bbs_MEM_OFFSET ) break; |
| 260 | pL = *( uint16** )pL; |
| 261 | } |
| 262 | |
| 263 | if( pL == NULL ) |
| 264 | { |
| 265 | /* no proper block -> allocate new one */ |
| 266 | uint32 blockSizeL = minSizeA > bbs_DYN_MEM_MIN_NEW_BLOCK_SIZE ? minSizeA : bbs_DYN_MEM_MIN_NEW_BLOCK_SIZE; |
| 267 | uint16* memPtrL = bbs_DynMemManager_alloc( cpA, ptrA, memSegPtrA, blockSizeL ); |
| 268 | if( memPtrL != NULL ) |
| 269 | { |
| 270 | *actualSizePtrA = blockSizeL; |
| 271 | } |
| 272 | else |
| 273 | { |
| 274 | *actualSizePtrA = 0; |
| 275 | } |
| 276 | return memPtrL; |
| 277 | } |
| 278 | else |
| 279 | { |
| 280 | *actualSizePtrA = ( ( uint32* )pL )[ 2 ] - bbs_MEM_OFFSET; |
| 281 | return pL + bbs_MEM_OFFSET; |
| 282 | } |
| 283 | } |
| 284 | |
| 285 | /* ------------------------------------------------------------------------- */ |
| 286 | |
| 287 | void bbs_DynMemManager_freeAll( struct bbs_Context* cpA, struct bbs_DynMemManager* ptrA ) |
| 288 | { |
| 289 | uint16** ppL = ( uint16** )ptrA->memPtrE; |
| 290 | while( ppL != NULL ) |
| 291 | { |
| 292 | uint16* memPtrL = ( uint16* )ppL; |
| 293 | ppL = ( uint16** )*ppL; |
| 294 | ptrA->freeFPtrE( memPtrL ); |
| 295 | } |
| 296 | ptrA->memPtrE = NULL; |
| 297 | } |
| 298 | |
| 299 | /* ------------------------------------------------------------------------- */ |
| 300 | |
| 301 | /* ========================================================================= */ |