| 1 | // Created on: 2002-04-12 |
| 2 | // Created by: Alexander GRIGORIEV |
| 3 | // Copyright (c) 2002-2012 OPEN CASCADE SAS |
| 4 | // |
| 5 | // The content of this file is subject to the Open CASCADE Technology Public |
| 6 | // License Version 6.5 (the "License"). You may not use the content of this file |
| 7 | // except in compliance with the License. Please obtain a copy of the License |
| 8 | // at http://www.opencascade.org and read it completely before using this file. |
| 9 | // |
| 10 | // The Initial Developer of the Original Code is Open CASCADE S.A.S., having its |
| 11 | // main offices at: 1, place des Freres Montgolfier, 78280 Guyancourt, France. |
| 12 | // |
| 13 | // The Original Code and all software distributed under the License is |
| 14 | // distributed on an "AS IS" basis, without warranty of any kind, and the |
| 15 | // Initial Developer hereby disclaims all such warranties, including without |
| 16 | // limitation, any warranties of merchantability, fitness for a particular |
| 17 | // purpose or non-infringement. Please see the License for the specific terms |
| 18 | // and conditions governing the rights and limitations under the License. |
| 19 | |
| 20 | |
| 21 | #include <NCollection_IncAllocator.hxx> |
| 22 | #include <NCollection_DataMap.hxx> |
| 23 | #include <NCollection_Map.hxx> |
| 24 | #include <Standard_Mutex.hxx> |
| 25 | #include <Standard_OutOfMemory.hxx> |
| 26 | #include <stdio.h> |
| 27 | |
| 28 | IMPLEMENT_STANDARD_HANDLE (NCollection_IncAllocator,NCollection_BaseAllocator) |
| 29 | IMPLEMENT_STANDARD_RTTIEXT (NCollection_IncAllocator,NCollection_BaseAllocator) |
| 30 | |
| 31 | namespace |
| 32 | { |
| 33 | |
| 34 | inline size_t IMEM_SIZE (const size_t theSize) |
| 35 | { |
| 36 | return (theSize - 1) / sizeof(NCollection_IncAllocator::aligned_t) + 1; |
| 37 | } |
| 38 | |
| 39 | inline size_t IMEM_ALIGN (const void* theAddress) |
| 40 | { |
| 41 | return sizeof(NCollection_IncAllocator::aligned_t) * IMEM_SIZE (size_t(theAddress)); |
| 42 | } |
| 43 | |
| 44 | #define IMEM_FREE(p_bl) (size_t(p_bl->p_end_block - p_bl->p_free_space)) |
| 45 | |
| 46 | }; |
| 47 | |
| 48 | #define MaxLookup 16 |
| 49 | |
| 50 | static Standard_Boolean IS_DEBUG = Standard_False; |
| 51 | |
| 52 | //======================================================================= |
| 53 | /** |
| 54 | * Static data map (address -> AllocatorID) |
| 55 | */ |
| 56 | //======================================================================= |
| 57 | static NCollection_DataMap<Standard_Address, Standard_Size>& StorageIDMap() |
| 58 | { |
| 59 | static NCollection_DataMap<Standard_Address, Standard_Size> TheMap; |
| 60 | return TheMap; |
| 61 | } |
| 62 | |
| 63 | //======================================================================= |
| 64 | /** |
| 65 | * Static map (AllocatorID) |
| 66 | */ |
| 67 | //======================================================================= |
| 68 | static NCollection_Map<Standard_Size>& StorageIDSet() |
| 69 | { |
| 70 | static NCollection_Map<Standard_Size> TheMap; |
| 71 | return TheMap; |
| 72 | } |
| 73 | |
| 74 | //======================================================================= |
| 75 | //function : IncAllocator_SetDebugFlag |
| 76 | //purpose : Turn on/off debugging of memory allocation |
| 77 | //======================================================================= |
| 78 | |
| 79 | Standard_EXPORT void IncAllocator_SetDebugFlag(const Standard_Boolean theDebug) |
| 80 | { |
| 81 | IS_DEBUG = theDebug; |
| 82 | } |
| 83 | |
| 84 | //======================================================================= |
| 85 | /** |
| 86 | * Static value of the current allocation ID. It provides unique |
| 87 | * numbering of allocators. |
| 88 | */ |
| 89 | //======================================================================= |
| 90 | static Standard_Size CurrentID = 0; |
| 91 | static Standard_Size CATCH_ID = 0; |
| 92 | |
| 93 | //======================================================================= |
| 94 | //function : Debug_Create |
| 95 | //purpose : Store the allocator address in the internal maps |
| 96 | //======================================================================= |
| 97 | |
| 98 | static void Debug_Create(Standard_Address theAlloc) |
| 99 | { |
| 100 | static Standard_Mutex aMutex; |
| 101 | aMutex.Lock(); |
| 102 | StorageIDMap().Bind(theAlloc, ++CurrentID); |
| 103 | StorageIDSet().Add(CurrentID); |
| 104 | aMutex.Unlock(); |
| 105 | if (CurrentID == CATCH_ID) |
| 106 | { |
| 107 | // Place for break point for creation of investigated allocator |
| 108 | int a = 1; |
| 109 | } |
| 110 | } |
| 111 | |
| 112 | //======================================================================= |
| 113 | //function : Debug_Destroy |
| 114 | //purpose : Forget the allocator address from the internal maps |
| 115 | //======================================================================= |
| 116 | |
| 117 | static void Debug_Destroy(Standard_Address theAlloc) |
| 118 | { |
| 119 | static Standard_Mutex aMutex; |
| 120 | aMutex.Lock(); |
| 121 | if (StorageIDMap().IsBound(theAlloc)) |
| 122 | { |
| 123 | Standard_Size anID = StorageIDMap()(theAlloc); |
| 124 | StorageIDSet().Remove(anID); |
| 125 | StorageIDMap().UnBind(theAlloc); |
| 126 | } |
| 127 | aMutex.Unlock(); |
| 128 | } |
| 129 | |
| 130 | //======================================================================= |
| 131 | //function : IncAllocator_PrintAlive |
| 132 | //purpose : Outputs the alive numbers to the file inc_alive.d |
| 133 | //======================================================================= |
| 134 | |
| 135 | Standard_EXPORT void IncAllocator_PrintAlive() |
| 136 | { |
| 137 | if (!StorageIDSet().IsEmpty()) |
| 138 | { |
| 139 | FILE * ff = fopen("inc_alive.d", "wt"); |
| 140 | if (ff == NULL) |
| 141 | { |
| 142 | cout << "failure writing file inc_alive.d" << endl; |
| 143 | } |
| 144 | else |
| 145 | { |
| 146 | fprintf(ff, "Alive IncAllocators (number, size in Kb)\n"); |
| 147 | NCollection_DataMap<Standard_Address, Standard_Size>::Iterator |
| 148 | itMap(StorageIDMap()); |
| 149 | Standard_Size aTotSize = 0; |
| 150 | Standard_Integer nbAlloc = 0; |
| 151 | for (; itMap.More(); itMap.Next()) |
| 152 | { |
| 153 | NCollection_IncAllocator* anAlloc = |
| 154 | static_cast<NCollection_IncAllocator*>(itMap.Key()); |
| 155 | Standard_Size anID = itMap.Value(); |
| 156 | Standard_Size aSize = anAlloc->GetMemSize(); |
| 157 | aTotSize += aSize; |
| 158 | nbAlloc++; |
| 159 | fprintf(ff, "%-8d %8.1f\n", anID, double(aSize)/1024); |
| 160 | } |
| 161 | fprintf(ff, "Total:\n%-8d %8.1f\n", nbAlloc, double(aTotSize)/1024); |
| 162 | fclose(ff); |
| 163 | } |
| 164 | } |
| 165 | } |
| 166 | |
| 167 | //======================================================================= |
| 168 | //function : NCollection_IncAllocator() |
| 169 | //purpose : Constructor |
| 170 | //======================================================================= |
| 171 | |
| 172 | NCollection_IncAllocator::NCollection_IncAllocator (const size_t theBlockSize) |
| 173 | { |
| 174 | #ifdef ALLOC_TRACK_USAGE |
| 175 | printf ("\n..NCollection_IncAllocator: Created (%x)\n",this); |
| 176 | #endif |
| 177 | #ifdef DEB |
| 178 | if (IS_DEBUG) |
| 179 | Debug_Create(this); |
| 180 | #endif |
| 181 | const size_t aDefault = DefaultBlockSize; |
| 182 | const size_t aSize = IMEM_SIZE(sizeof(IBlock)) + |
| 183 | IMEM_SIZE((theBlockSize > 2*sizeof(IBlock)) ? theBlockSize : aDefault); |
| 184 | IBlock * const aBlock = (IBlock *) malloc (aSize * sizeof(aligned_t)); |
| 185 | myFirstBlock = aBlock; |
| 186 | mySize = aSize - IMEM_SIZE(sizeof(IBlock)); |
| 187 | myMemSize = aSize * sizeof(aligned_t); |
| 188 | if (aBlock == NULL) |
| 189 | Standard_OutOfMemory::Raise("NCollection_IncAllocator: out of memory"); |
| 190 | aBlock -> p_free_space = (aligned_t *) IMEM_ALIGN (&aBlock[1]); |
| 191 | aBlock -> p_end_block = ((aligned_t *) aBlock) + aSize; |
| 192 | aBlock -> p_next = NULL; |
| 193 | } |
| 194 | |
| 195 | //======================================================================= |
| 196 | //function : ~NCollection_IncAllocator |
| 197 | //purpose : Destructor |
| 198 | //======================================================================= |
| 199 | |
| 200 | NCollection_IncAllocator::~NCollection_IncAllocator () |
| 201 | { |
| 202 | #ifdef DEB |
| 203 | if (IS_DEBUG) |
| 204 | Debug_Destroy(this); |
| 205 | #endif |
| 206 | Clean(); |
| 207 | free (myFirstBlock); |
| 208 | } |
| 209 | |
| 210 | //======================================================================= |
| 211 | //function : Allocate |
| 212 | //purpose : allocate a memory |
| 213 | //remark : returns NULL if allocation fails |
| 214 | //======================================================================= |
| 215 | |
| 216 | void * NCollection_IncAllocator::Allocate (const size_t aSize) |
| 217 | { |
| 218 | aligned_t * aResult = NULL; |
| 219 | const size_t cSize = aSize ? IMEM_SIZE(aSize) : 0; |
| 220 | |
| 221 | if (cSize > mySize) { |
| 222 | /* If the requested size exceeds normal allocation size, allocate |
| 223 | a separate block and place it as the head of the list */ |
| 224 | aResult = (aligned_t *) allocateNewBlock (cSize+1); |
| 225 | if (aResult) |
| 226 | myFirstBlock -> p_free_space = myFirstBlock -> p_end_block; |
| 227 | else |
| 228 | Standard_OutOfMemory::Raise("NCollection_IncAllocator: out of memory"); |
| 229 | } else |
| 230 | if (cSize <= IMEM_FREE(myFirstBlock)) { |
| 231 | /* If the requested size fits into the free space in the 1st block */ |
| 232 | aResult = myFirstBlock -> allocateInBlock (cSize); |
| 233 | } else { |
| 234 | /* Search for a block in the list with enough free space */ |
| 235 | int aMaxLookup = MaxLookup; /* limit the number of blocks to query */ |
| 236 | IBlock * aCurrentBlock = myFirstBlock -> p_next; |
| 237 | while (aCurrentBlock && aMaxLookup--) { |
| 238 | if (cSize <= IMEM_FREE(aCurrentBlock)) { |
| 239 | aResult = aCurrentBlock -> allocateInBlock (cSize); |
| 240 | break; |
| 241 | } |
| 242 | aCurrentBlock = aCurrentBlock -> p_next; |
| 243 | } |
| 244 | if (aResult == NULL) { |
| 245 | /* There is no available block with enough free space. Create a new |
| 246 | one and place it in the head of the list */ |
| 247 | aResult = (aligned_t *) allocateNewBlock (mySize); |
| 248 | if (aResult) |
| 249 | myFirstBlock -> p_free_space = aResult + cSize; |
| 250 | else |
| 251 | { |
| 252 | const size_t aDefault = IMEM_SIZE(DefaultBlockSize); |
| 253 | if (cSize > aDefault) |
| 254 | Standard_OutOfMemory::Raise("NCollection_IncAllocator: out of memory"); |
| 255 | else |
| 256 | { |
| 257 | aResult = (aligned_t *) allocateNewBlock (aDefault); |
| 258 | if (aResult) |
| 259 | myFirstBlock -> p_free_space = aResult + cSize; |
| 260 | else |
| 261 | Standard_OutOfMemory::Raise("NCollection_IncAllocator: out of memory"); |
| 262 | } |
| 263 | } |
| 264 | } |
| 265 | } |
| 266 | return aResult; |
| 267 | } |
| 268 | |
| 269 | //======================================================================= |
| 270 | //function : Reallocate |
| 271 | //purpose : |
| 272 | //======================================================================= |
| 273 | |
| 274 | void * NCollection_IncAllocator::Reallocate (void * theAddress, |
| 275 | const size_t oldSize, |
| 276 | const size_t newSize) |
| 277 | { |
| 278 | // Check that the dummy parameters are OK |
| 279 | if (theAddress == NULL || oldSize == 0) |
| 280 | return Allocate (newSize); |
| 281 | const size_t cOldSize = IMEM_SIZE(oldSize); |
| 282 | const size_t cNewSize = newSize ? IMEM_SIZE(newSize) : 0; |
| 283 | aligned_t * anAddress = (aligned_t *) theAddress; |
| 284 | |
| 285 | // We check only the LAST allocation to do the real extension/contraction |
| 286 | if (anAddress + cOldSize == myFirstBlock -> p_free_space) { |
| 287 | myFirstBlock -> p_free_space = anAddress; |
| 288 | // If the new size fits into the memory block => OK |
| 289 | // This also includes any case of contraction |
| 290 | if (cNewSize <= IMEM_FREE(myFirstBlock)) { |
| 291 | myFirstBlock -> p_free_space += cNewSize; |
| 292 | return anAddress; |
| 293 | } |
| 294 | } |
| 295 | // In case of contraction of non-terminating allocation, do nothing |
| 296 | else if (cOldSize >= cNewSize) |
| 297 | return anAddress; |
| 298 | // Extension of non-terminated allocation if there is enough room in the |
| 299 | // current memory block |
| 300 | if (cNewSize <= IMEM_FREE(myFirstBlock)) { |
| 301 | aligned_t * aResult = myFirstBlock -> allocateInBlock (cNewSize); |
| 302 | if (aResult) |
| 303 | for (unsigned i = 0; i < cOldSize; i++) |
| 304 | aResult[i] = anAddress[i]; |
| 305 | return aResult; |
| 306 | } |
| 307 | |
| 308 | // This is either of the cases: |
| 309 | // - extension of non-terminating allocation, or |
| 310 | // - extension of terminating allocation when the new size is too big |
| 311 | // In both cases create a new memory block, allocate memory and copy there |
| 312 | // the reallocated memory. |
| 313 | size_t cMaxSize = mySize > cNewSize ? mySize : cNewSize; |
| 314 | aligned_t * aResult = (aligned_t *) allocateNewBlock (cMaxSize); |
| 315 | if (aResult) { |
| 316 | myFirstBlock -> p_free_space = aResult + cNewSize; |
| 317 | for (unsigned i = 0; i < cOldSize; i++) |
| 318 | aResult[i] = anAddress[i]; |
| 319 | } |
| 320 | else |
| 321 | { |
| 322 | Standard_OutOfMemory::Raise("NCollection_IncAllocator: out of memory"); |
| 323 | } |
| 324 | return aResult; |
| 325 | } |
| 326 | |
| 327 | //======================================================================= |
| 328 | //function : Free |
| 329 | //purpose : |
| 330 | //======================================================================= |
| 331 | |
| 332 | void NCollection_IncAllocator::Free (void *) |
| 333 | {} |
| 334 | |
| 335 | //======================================================================= |
| 336 | //function : Clean |
| 337 | //purpose : |
| 338 | //======================================================================= |
| 339 | |
| 340 | void NCollection_IncAllocator::Clean () |
| 341 | { |
| 342 | #ifdef ALLOC_TRACK_USAGE |
| 343 | printf ("\n..NCollection_IncAllocator: Memory size to clean:%8.1f kB (%x)\n", |
| 344 | double(GetMemSize())/1024, this); |
| 345 | #endif |
| 346 | IBlock * aBlock = myFirstBlock; |
| 347 | if (aBlock) { |
| 348 | aBlock -> p_free_space = (aligned_t *) &aBlock[1]; |
| 349 | aBlock = aBlock -> p_next; |
| 350 | while (aBlock) { |
| 351 | IBlock * aNext = aBlock -> p_next; |
| 352 | free (aBlock); |
| 353 | aBlock = aNext; |
| 354 | } |
| 355 | myFirstBlock -> p_next = NULL; |
| 356 | } |
| 357 | myMemSize = 0; |
| 358 | } |
| 359 | |
| 360 | //======================================================================= |
| 361 | //function : Reset |
| 362 | //purpose : |
| 363 | //======================================================================= |
| 364 | |
| 365 | void NCollection_IncAllocator::Reset (const Standard_Boolean doReleaseMem) |
| 366 | { |
| 367 | if (doReleaseMem) |
| 368 | Clean(); |
| 369 | else { |
| 370 | Standard_Integer aBlockCount(0); |
| 371 | IBlock * aBlock = myFirstBlock; |
| 372 | while (aBlock) |
| 373 | if (aBlockCount++ < MaxLookup) { |
| 374 | aBlock -> p_free_space = (aligned_t *) &aBlock[1]; |
| 375 | if (aBlockCount < MaxLookup) |
| 376 | aBlock = aBlock -> p_next; |
| 377 | else { |
| 378 | IBlock * aNext = aBlock -> p_next; |
| 379 | aBlock -> p_next = NULL; |
| 380 | aBlock = aNext; |
| 381 | } |
| 382 | } else { |
| 383 | IBlock * aNext = aBlock -> p_next; |
| 384 | myMemSize -= (aBlock -> p_end_block - (aligned_t *) aBlock) * sizeof (aligned_t); |
| 385 | free (aBlock); |
| 386 | aBlock = aNext; |
| 387 | } |
| 388 | } |
| 389 | } |
| 390 | |
| 391 | //======================================================================= |
| 392 | //function : GetMemSize |
| 393 | //purpose : diagnostic utility |
| 394 | //======================================================================= |
| 395 | |
| 396 | size_t NCollection_IncAllocator::GetMemSize () const |
| 397 | { |
| 398 | // size_t aResult = 0; |
| 399 | // IBlock * aBlock = myFirstBlock; |
| 400 | // while (aBlock) { |
| 401 | // aResult += (aBlock -> p_end_block - (aligned_t *) aBlock); |
| 402 | // aBlock = aBlock -> p_next; |
| 403 | // } |
| 404 | // return aResult * sizeof (aligned_t); |
| 405 | return myMemSize; |
| 406 | } |
| 407 | |
| 408 | //======================================================================= |
| 409 | //function : allocateNewBlock |
| 410 | //purpose : |
| 411 | //======================================================================= |
| 412 | |
| 413 | void * NCollection_IncAllocator::allocateNewBlock (const size_t cSize) |
| 414 | { |
| 415 | aligned_t * aResult = 0L; |
| 416 | const size_t aSz = cSize + IMEM_SIZE(sizeof(IBlock)); |
| 417 | IBlock * aBlock = (IBlock *) malloc (aSz * sizeof(aligned_t)); |
| 418 | if (aBlock) { |
| 419 | aBlock -> p_end_block = ((aligned_t *)aBlock) + aSz; |
| 420 | aBlock -> p_next = myFirstBlock; |
| 421 | myFirstBlock = aBlock; |
| 422 | aResult = (aligned_t *) IMEM_ALIGN(&aBlock[1]); |
| 423 | myMemSize += aSz * sizeof(aligned_t); |
| 424 | } |
| 425 | return aResult; |
| 426 | } |