granicus.if.org Git - imagemagick/blob - magick/resource.c

   1 /*
   2 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
   3 %                                                                             %
   4 %                                                                             %
   5 %                                                                             %
   6 %           RRRR    EEEEE   SSSSS   OOO   U   U  RRRR    CCCC  EEEEE          %
   7 %           R   R   E       SS     O   O  U   U  R   R  C      E              %
   8 %           RRRR    EEE      SSS   O   O  U   U  RRRR   C      EEE            %
   9 %           R R     E          SS  O   O  U   U  R R    C      E              %
  10 %           R  R    EEEEE   SSSSS   OOO    UUU   R  R    CCCC  EEEEE          %
  11 %                                                                             %
  12 %                                                                             %
  13 %                        Get/Set MagickCore Resources                         %
  14 %                                                                             %
  15 %                              Software Design                                %
  16 %                                John Cristy                                  %
  17 %                               September 2002                                %
  18 %                                                                             %
  19 %                                                                             %
  20 %  Copyright 1999-2011 ImageMagick Studio LLC, a non-profit organization      %
  21 %  dedicated to making software imaging solutions freely available.           %
  22 %                                                                             %
  23 %  You may not use this file except in compliance with the License.  You may  %
  24 %  obtain a copy of the License at                                            %
  25 %                                                                             %
  26 %    http://www.imagemagick.org/script/license.php                            %
  27 %                                                                             %
  28 %  Unless required by applicable law or agreed to in writing, software        %
  29 %  distributed under the License is distributed on an "AS IS" BASIS,          %
  30 %  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.   %
  31 %  See the License for the specific language governing permissions and        %
  32 %  limitations under the License.                                             %
  33 %                                                                             %
  34 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  35 %
  36 %
  37 */
  38 \f
  39 /*
  40   Include declarations.
  41 */
  42 #include "magick/studio.h"
  43 #include "magick/cache.h"
  44 #include "magick/configure.h"
  45 #include "magick/exception.h"
  46 #include "magick/exception-private.h"
  47 #include "magick/hashmap.h"
  48 #include "magick/log.h"
  49 #include "magick/image.h"
  50 #include "magick/memory_.h"
  51 #include "magick/option.h"
  52 #include "magick/policy.h"
  53 #include "magick/random_.h"
  54 #include "magick/registry.h"
  55 #include "magick/resource_.h"
  56 #include "magick/semaphore.h"
  57 #include "magick/signature-private.h"
  58 #include "magick/string_.h"
  59 #include "magick/string-private.h"
  60 #include "magick/splay-tree.h"
  61 #include "magick/thread-private.h"
  62 #include "magick/token.h"
  63 #include "magick/utility.h"
  64 \f
  65 /*
  66   Typedef declarations.
  67 */
  68 typedef struct _ResourceInfo
  69 {
  70   MagickOffsetType
  71     area,
  72     memory,
  73     map,
  74     disk,
  75     file,
  76     thread,
  77     time;
  78
  79   MagickSizeType
  80     area_limit,
  81     memory_limit,
  82     map_limit,
  83     disk_limit,
  84     file_limit,
  85     thread_limit,
  86     time_limit;
  87 } ResourceInfo;
  88 \f
  89 /*
  90   Global declarations.
  91 */
  92 static RandomInfo
  93   *random_info = (RandomInfo *) NULL;
  94
  95 static ResourceInfo
  96   resource_info =
  97   {
  98     MagickULLConstant(0),
  99     MagickULLConstant(0),
 100     MagickULLConstant(0),
 101     MagickULLConstant(0),
 102     MagickULLConstant(0),
 103     MagickULLConstant(0),
 104     MagickULLConstant(0),
 105     MagickULLConstant(3072)*1024*1024/sizeof(PixelPacket),
 106     MagickULLConstant(1536)*1024*1024,
 107     MagickULLConstant(3072)*1024*1024,
 108     MagickResourceInfinity,
 109     MagickULLConstant(768),
 110     MagickULLConstant(4),
 111     MagickResourceInfinity
 112   };
 113
 114 static SemaphoreInfo
 115   *resource_semaphore = (SemaphoreInfo *) NULL;
 116
 117 static SplayTreeInfo
 118   *temporary_resources = (SplayTreeInfo *) NULL;
 119 \f
 120 /*
 121 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 122 %                                                                             %
 123 %                                                                             %
 124 %                                                                             %
 125 %   A c q u i r e M a g i c k R e s o u r c e                                 %
 126 %                                                                             %
 127 %                                                                             %
 128 %                                                                             %
 129 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 130 %
 131 %  AcquireMagickResource() acquires resources of the specified type.
 132 %  MagickFalse is returned if the specified resource is exhausted otherwise
 133 %  MagickTrue.
 134 %
 135 %  The format of the AcquireMagickResource() method is:
 136 %
 137 %      MagickBooleanType AcquireMagickResource(const ResourceType type,
 138 %        const MagickSizeType size)
 139 %
 140 %  A description of each parameter follows:
 141 %
 142 %    o type: the type of resource.
 143 %
 144 %    o size: the number of bytes needed from for this resource.
 145 %
 146 */
 147 MagickExport MagickBooleanType AcquireMagickResource(const ResourceType type,
 148   const MagickSizeType size)
 149 {
 150   char
 151     resource_current[MaxTextExtent],
 152     resource_limit[MaxTextExtent],
 153     resource_request[MaxTextExtent];
 154
 155   MagickBooleanType
 156     status;
 157
 158   MagickSizeType
 159     limit;
 160
 161   status=MagickFalse;
 162   (void) FormatMagickSize(size,MagickFalse,resource_request);
 163   if (resource_semaphore == (SemaphoreInfo *) NULL)
 164     AcquireSemaphoreInfo(&resource_semaphore);
 165   LockSemaphoreInfo(resource_semaphore);
 166   switch (type)
 167   {
 168     case AreaResource:
 169     {
 170       resource_info.area=(MagickOffsetType) size;
 171       limit=resource_info.area_limit;
 172       status=(resource_info.area_limit == MagickResourceInfinity) ||
 173         (size < limit) ? MagickTrue : MagickFalse;
 174       (void) FormatMagickSize((MagickSizeType) resource_info.area,MagickFalse,
 175         resource_current);
 176       (void) FormatMagickSize(resource_info.area_limit,MagickFalse,
 177         resource_limit);
 178       break;
 179     }
 180     case MemoryResource:
 181     {
 182       resource_info.memory+=size;
 183       limit=resource_info.memory_limit;
 184       status=(resource_info.memory_limit == MagickResourceInfinity) ||
 185         ((MagickSizeType) resource_info.memory < limit) ?
 186         MagickTrue : MagickFalse;
 187       (void) FormatMagickSize((MagickSizeType) resource_info.memory,MagickTrue,
 188         resource_current);
 189       (void) FormatMagickSize(resource_info.memory_limit,MagickTrue,
 190         resource_limit);
 191       break;
 192     }
 193     case MapResource:
 194     {
 195       resource_info.map+=size;
 196       limit=resource_info.map_limit;
 197       status=(resource_info.map_limit == MagickResourceInfinity) ||
 198         ((MagickSizeType) resource_info.map < limit) ?
 199         MagickTrue : MagickFalse;
 200       (void) FormatMagickSize((MagickSizeType) resource_info.map,MagickTrue,
 201         resource_current);
 202       (void) FormatMagickSize(resource_info.map_limit,MagickTrue,
 203         resource_limit);
 204       break;
 205     }
 206     case DiskResource:
 207     {
 208       resource_info.disk+=size;
 209       limit=resource_info.disk_limit;
 210       status=(resource_info.disk_limit == MagickResourceInfinity) ||
 211         ((MagickSizeType) resource_info.disk < limit) ?
 212         MagickTrue : MagickFalse;
 213       (void) FormatMagickSize((MagickSizeType) resource_info.disk,MagickTrue,
 214         resource_current);
 215       (void) FormatMagickSize(resource_info.disk_limit,MagickTrue,
 216         resource_limit);
 217       break;
 218     }
 219     case FileResource:
 220     {
 221       resource_info.file+=size;
 222       limit=resource_info.file_limit;
 223       status=(resource_info.file_limit == MagickResourceInfinity) ||
 224         ((MagickSizeType) resource_info.file < limit) ?
 225         MagickTrue : MagickFalse;
 226       (void) FormatMagickSize((MagickSizeType) resource_info.file,MagickFalse,
 227         resource_current);
 228       (void) FormatMagickSize((MagickSizeType) resource_info.file_limit,
 229         MagickFalse,resource_limit);
 230       break;
 231     }
 232     case ThreadResource:
 233     {
 234       resource_info.thread+=size;
 235       limit=resource_info.thread_limit;
 236       status=(resource_info.thread_limit == MagickResourceInfinity) ||
 237         ((MagickSizeType) resource_info.thread < limit) ?
 238         MagickTrue : MagickFalse;
 239       (void) FormatMagickSize((MagickSizeType) resource_info.thread,MagickFalse,
 240         resource_current);
 241       (void) FormatMagickSize((MagickSizeType) resource_info.thread_limit,
 242         MagickFalse,resource_limit);
 243       break;
 244     }
 245     case TimeResource:
 246     {
 247       resource_info.time+=size;
 248       limit=resource_info.time_limit;
 249       status=(resource_info.time_limit == MagickResourceInfinity) ||
 250         ((MagickSizeType) resource_info.time < limit) ?
 251         MagickTrue : MagickFalse;
 252       (void) FormatMagickSize((MagickSizeType) resource_info.time,MagickFalse,
 253         resource_current);
 254       (void) FormatMagickSize((MagickSizeType) resource_info.time_limit,
 255         MagickFalse,resource_limit);
 256       break;
 257     }
 258     default:
 259       break;
 260   }
 261   UnlockSemaphoreInfo(resource_semaphore);
 262   (void) LogMagickEvent(ResourceEvent,GetMagickModule(),"%s: %s/%s/%s",
 263     MagickOptionToMnemonic(MagickResourceOptions,(ssize_t) type),
 264     resource_request,resource_current,resource_limit);
 265   return(status);
 266 }
 267 \f
 268 /*
 269 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 270 %                                                                             %
 271 %                                                                             %
 272 %                                                                             %
 273 +   A s y n c h r o n o u s R e s o u r c e C o m p o n e n t T e r m i n u s %
 274 %                                                                             %
 275 %                                                                             %
 276 %                                                                             %
 277 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 278 %
 279 %  AsynchronousResourceComponentTerminus() destroys the resource environment.
 280 %  It differs from ResourceComponentTerminus() in that it can be called from a
 281 %  asynchronous signal handler.
 282 %
 283 %  The format of the ResourceComponentTerminus() method is:
 284 %
 285 %      ResourceComponentTerminus(void)
 286 %
 287 */
 288 MagickExport void AsynchronousResourceComponentTerminus(void)
 289 {
 290   const char
 291     *path;
 292
 293   if (temporary_resources == (SplayTreeInfo *) NULL)
 294     return;
 295   /*
 296     Remove any lingering temporary files.
 297   */
 298   ResetSplayTreeIterator(temporary_resources);
 299   path=(const char *) GetNextKeyInSplayTree(temporary_resources);
 300   while (path != (const char *) NULL)
 301   {
 302     (void) remove(path);
 303     path=(const char *) GetNextKeyInSplayTree(temporary_resources);
 304   }
 305 }
 306 \f
 307 /*
 308 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 309 %                                                                             %
 310 %                                                                             %
 311 %                                                                             %
 312 %   A c q u i r e U n i q u e F i l e R e s o u r c e                         %
 313 %                                                                             %
 314 %                                                                             %
 315 %                                                                             %
 316 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 317 %
 318 %  AcquireUniqueFileResource() returns a unique file name, and returns a file
 319 %  descriptor for the file open for reading and writing.
 320 %
 321 %  The format of the AcquireUniqueFileResource() method is:
 322 %
 323 %      int AcquireUniqueFileResource(char *path)
 324 %
 325 %  A description of each parameter follows:
 326 %
 327 %   o  path:  Specifies a pointer to an array of characters.  The unique path
 328 %      name is returned in this array.
 329 %
 330 */
 331
 332 static void *DestroyTemporaryResources(void *temporary_resource)
 333 {
 334   (void) remove((char *) temporary_resource);
 335   temporary_resource=DestroyString((char *) temporary_resource);
 336   return((void *) NULL);
 337 }
 338
 339 static MagickBooleanType GetPathTemplate(char *path)
 340 {
 341   char
 342     *directory;
 343
 344   ExceptionInfo
 345     *exception;
 346
 347   MagickBooleanType
 348     status;
 349
 350   register char
 351     *p;
 352
 353   struct stat
 354     attributes;
 355
 356   (void) CopyMagickString(path,"magick-XXXXXXXX",MaxTextExtent);
 357   exception=AcquireExceptionInfo();
 358   directory=(char *) GetImageRegistry(StringRegistryType,"temporary-path",
 359     exception);
 360   exception=DestroyExceptionInfo(exception);
 361   if (directory == (char *) NULL)
 362     directory=GetEnvironmentValue("MAGICK_TEMPORARY_PATH");
 363   if (directory == (char *) NULL)
 364     directory=GetEnvironmentValue("MAGICK_TMPDIR");
 365   if (directory == (char *) NULL)
 366     directory=GetPolicyValue("temporary-path");
 367   if (directory == (char *) NULL)
 368     directory=GetEnvironmentValue("TMPDIR");
 369 #if defined(MAGICKCORE_WINDOWS_SUPPORT) || defined(__OS2__)
 370   if (directory == (char *) NULL)
 371     directory=GetEnvironmentValue("TMP");
 372   if (directory == (char *) NULL)
 373     directory=GetEnvironmentValue("TEMP");
 374 #endif
 375 #if defined(__VMS)
 376   if (directory == (char *) NULL)
 377     directory=GetEnvironmentValue("MTMPDIR");
 378 #endif
 379 #if defined(P_tmpdir)
 380   if (directory == (char *) NULL)
 381     directory=ConstantString(P_tmpdir);
 382 #endif
 383   if (directory == (char *) NULL)
 384     return(MagickTrue);
 385   if (strlen(directory) > (MaxTextExtent-15))
 386     {
 387       directory=DestroyString(directory);
 388       return(MagickTrue);
 389     }
 390   status=GetPathAttributes(directory,&attributes);
 391   if ((status == MagickFalse) || !S_ISDIR(attributes.st_mode))
 392     {
 393       directory=DestroyString(directory);
 394       return(MagickTrue);
 395     }
 396   if (directory[strlen(directory)-1] == *DirectorySeparator)
 397     (void) FormatMagickString(path,MaxTextExtent,"%smagick-XXXXXXXX",directory);
 398   else
 399     (void) FormatMagickString(path,MaxTextExtent,"%s%smagick-XXXXXXXX",
 400       directory,DirectorySeparator);
 401   directory=DestroyString(directory);
 402   if (*DirectorySeparator != '/')
 403     for (p=path; *p != '\0'; p++)
 404       if (*p == *DirectorySeparator)
 405         *p='/';
 406   return(MagickTrue);
 407 }
 408
 409 MagickExport int AcquireUniqueFileResource(char *path)
 410 {
 411 #if !defined(O_NOFOLLOW)
 412 #define O_NOFOLLOW 0
 413 #endif
 414 #if !defined(TMP_MAX)
 415 # define TMP_MAX  238328
 416 #endif
 417
 418   int
 419     c,
 420     file;
 421
 422   register char
 423     *p;
 424
 425   register ssize_t
 426     i;
 427
 428   static const char
 429     portable_filename[65] =
 430       "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789_-";
 431
 432   StringInfo
 433     *key;
 434
 435   unsigned char
 436     *datum;
 437
 438   assert(path != (char *) NULL);
 439   (void) LogMagickEvent(ResourceEvent,GetMagickModule(),"%s",path);
 440   if (random_info == (RandomInfo *) NULL)
 441     random_info=AcquireRandomInfo();
 442   file=(-1);
 443   for (i=0; i < (ssize_t) TMP_MAX; i++)
 444   {
 445     /*
 446       Get temporary pathname.
 447     */
 448     (void) GetPathTemplate(path);
 449     key=GetRandomKey(random_info,2);
 450     p=path+strlen(path)-8;
 451     datum=GetStringInfoDatum(key);
 452     for (i=0; i < (ssize_t) GetStringInfoLength(key); i++)
 453     {
 454       c=(int) (datum[i] & 0x3f);
 455       *p++=portable_filename[c];
 456     }
 457     key=DestroyStringInfo(key);
 458 #if defined(MAGICKCORE_HAVE_MKSTEMP)
 459     file=mkstemp(path);
 460 #if defined(__OS2__)
 461     setmode(file,O_BINARY);
 462 #endif
 463     if (file != -1)
 464       break;
 465 #endif
 466     key=GetRandomKey(random_info,6);
 467     p=path+strlen(path)-6;
 468     datum=GetStringInfoDatum(key);
 469     for (i=0; i < (ssize_t) GetStringInfoLength(key); i++)
 470     {
 471       c=(int) (datum[i] & 0x3f);
 472       *p++=portable_filename[c];
 473     }
 474     key=DestroyStringInfo(key);
 475     file=open(path,O_RDWR | O_CREAT | O_EXCL | O_BINARY | O_NOFOLLOW,S_MODE);
 476     if ((file >= 0) || (errno != EEXIST))
 477       break;
 478   }
 479   (void) LogMagickEvent(ResourceEvent,GetMagickModule(),"%s",path);
 480   if (file == -1)
 481     return(file);
 482   if (resource_semaphore == (SemaphoreInfo *) NULL)
 483     AcquireSemaphoreInfo(&resource_semaphore);
 484   LockSemaphoreInfo(resource_semaphore);
 485   if (temporary_resources == (SplayTreeInfo *) NULL)
 486     temporary_resources=NewSplayTree(CompareSplayTreeString,
 487       DestroyTemporaryResources,(void *(*)(void *)) NULL);
 488   UnlockSemaphoreInfo(resource_semaphore);
 489   (void) AddValueToSplayTree(temporary_resources,ConstantString(path),
 490     (const void *) NULL);
 491   return(file);
 492 }
 493 \f
 494 /*
 495 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 496 %                                                                             %
 497 %                                                                             %
 498 %                                                                             %
 499 %   G e t M a g i c k R e s o u r c e                                         %
 500 %                                                                             %
 501 %                                                                             %
 502 %                                                                             %
 503 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 504 %
 505 %  GetMagickResource() returns the specified resource.
 506 %
 507 %  The format of the GetMagickResource() method is:
 508 %
 509 %      MagickSizeType GetMagickResource(const ResourceType type)
 510 %
 511 %  A description of each parameter follows:
 512 %
 513 %    o type: the type of resource.
 514 %
 515 */
 516 MagickExport MagickSizeType GetMagickResource(const ResourceType type)
 517 {
 518   MagickSizeType
 519     resource;
 520
 521   resource=0;
 522   LockSemaphoreInfo(resource_semaphore);
 523   switch (type)
 524   {
 525     case AreaResource:
 526     {
 527       resource=(MagickSizeType) resource_info.area;
 528       break;
 529     }
 530     case MemoryResource:
 531     {
 532       resource=(MagickSizeType) resource_info.memory;
 533       break;
 534     }
 535     case MapResource:
 536     {
 537       resource=(MagickSizeType) resource_info.map;
 538       break;
 539     }
 540     case DiskResource:
 541     {
 542       resource=(MagickSizeType) resource_info.disk;
 543       break;
 544     }
 545     case FileResource:
 546     {
 547       resource=(MagickSizeType) resource_info.file;
 548       break;
 549     }
 550     case ThreadResource:
 551     {
 552       resource=(MagickSizeType) resource_info.thread;
 553       break;
 554     }
 555     case TimeResource:
 556     {
 557       resource=(MagickSizeType) resource_info.time;
 558       break;
 559     }
 560     default:
 561       break;
 562   }
 563   UnlockSemaphoreInfo(resource_semaphore);
 564   return(resource);
 565 }
 566 \f
 567 /*
 568 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 569 %                                                                             %
 570 %                                                                             %
 571 %                                                                             %
 572 %   G e t M a g i c k R e s o u r c e L i m i t                               %
 573 %                                                                             %
 574 %                                                                             %
 575 %                                                                             %
 576 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 577 %
 578 %  GetMagickResourceLimit() returns the specified resource limit.
 579 %
 580 %  The format of the GetMagickResourceLimit() method is:
 581 %
 582 %      MagickSizeType GetMagickResourceLimit(const ResourceType type)
 583 %
 584 %  A description of each parameter follows:
 585 %
 586 %    o type: the type of resource.
 587 %
 588 */
 589 MagickExport MagickSizeType GetMagickResourceLimit(const ResourceType type)
 590 {
 591   MagickSizeType
 592     resource;
 593
 594   resource=0;
 595   if (resource_semaphore == (SemaphoreInfo *) NULL)
 596     AcquireSemaphoreInfo(&resource_semaphore);
 597   LockSemaphoreInfo(resource_semaphore);
 598   switch (type)
 599   {
 600     case AreaResource:
 601     {
 602       resource=resource_info.area_limit;
 603       break;
 604     }
 605     case MemoryResource:
 606     {
 607       resource=resource_info.memory_limit;
 608       break;
 609     }
 610     case MapResource:
 611     {
 612       resource=resource_info.map_limit;
 613       break;
 614     }
 615     case DiskResource:
 616     {
 617       resource=resource_info.disk_limit;
 618       break;
 619     }
 620     case FileResource:
 621     {
 622       resource=resource_info.file_limit;
 623       break;
 624     }
 625     case ThreadResource:
 626     {
 627       resource=resource_info.thread_limit;
 628       break;
 629     }
 630     case TimeResource:
 631     {
 632       resource=resource_info.time_limit;
 633       break;
 634     }
 635     default:
 636       break;
 637   }
 638   UnlockSemaphoreInfo(resource_semaphore);
 639   return(resource);
 640 }
 641 \f
 642 /*
 643 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 644 %                                                                             %
 645 %                                                                             %
 646 %                                                                             %
 647 %  L i s t M a g i c k R e s o u r c e I n f o                                %
 648 %                                                                             %
 649 %                                                                             %
 650 %                                                                             %
 651 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 652 %
 653 %  ListMagickResourceInfo() lists the resource info to a file.
 654 %
 655 %  The format of the ListMagickResourceInfo method is:
 656 %
 657 %      MagickBooleanType ListMagickResourceInfo(FILE *file,
 658 %        ExceptionInfo *exception)
 659 %
 660 %  A description of each parameter follows.
 661 %
 662 %    o file:  An pointer to a FILE.
 663 %
 664 %    o exception: return any errors or warnings in this structure.
 665 %
 666 */
 667 MagickExport MagickBooleanType ListMagickResourceInfo(FILE *file,
 668   ExceptionInfo *magick_unused(exception))
 669 {
 670   char
 671     area_limit[MaxTextExtent],
 672     disk_limit[MaxTextExtent],
 673     map_limit[MaxTextExtent],
 674     memory_limit[MaxTextExtent],
 675     time_limit[MaxTextExtent];
 676
 677   if (file == (const FILE *) NULL)
 678     file=stdout;
 679   if (resource_semaphore == (SemaphoreInfo *) NULL)
 680     AcquireSemaphoreInfo(&resource_semaphore);
 681   LockSemaphoreInfo(resource_semaphore);
 682   (void) FormatMagickSize(resource_info.area_limit,MagickFalse,area_limit);
 683   (void) FormatMagickSize(resource_info.memory_limit,MagickTrue,memory_limit);
 684   (void) FormatMagickSize(resource_info.map_limit,MagickTrue,map_limit);
 685   (void) CopyMagickString(disk_limit,"unlimited",MaxTextExtent);
 686   if (resource_info.disk_limit != MagickResourceInfinity)
 687     (void) FormatMagickSize(resource_info.disk_limit,MagickTrue,disk_limit);
 688   (void) CopyMagickString(time_limit,"unlimited",MaxTextExtent);
 689   if (resource_info.time_limit != MagickResourceInfinity)
 690     (void) FormatMagickString(time_limit,MaxTextExtent,"%.20g",(double)
 691       resource_info.time_limit);
 692   (void) fprintf(file,"File         Area       Memory          Map"
 693     "         Disk    Thread         Time\n");
 694   (void) fprintf(file,"--------------------------------------------------------"
 695     "-----------------------\n");
 696   (void) fprintf(file,"%4g   %10s   %10s   %10s   %10s    %6g  %11s\n",(double)
 697     resource_info.file_limit,area_limit,memory_limit,map_limit,disk_limit,
 698     (double) resource_info.thread_limit,time_limit);
 699   (void) fflush(file);
 700   UnlockSemaphoreInfo(resource_semaphore);
 701   return(MagickTrue);
 702 }
 703 \f
 704 /*
 705 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 706 %                                                                             %
 707 %                                                                             %
 708 %                                                                             %
 709 %   R e l i n q u i s h M a g i c k R e s o u r c e                           %
 710 %                                                                             %
 711 %                                                                             %
 712 %                                                                             %
 713 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 714 %
 715 %  RelinquishMagickResource() relinquishes resources of the specified type.
 716 %
 717 %  The format of the RelinquishMagickResource() method is:
 718 %
 719 %      void RelinquishMagickResource(const ResourceType type,
 720 %        const MagickSizeType size)
 721 %
 722 %  A description of each parameter follows:
 723 %
 724 %    o type: the type of resource.
 725 %
 726 %    o size: the size of the resource.
 727 %
 728 */
 729 MagickExport void RelinquishMagickResource(const ResourceType type,
 730   const MagickSizeType size)
 731 {
 732   char
 733     resource_current[MaxTextExtent],
 734     resource_limit[MaxTextExtent],
 735     resource_request[MaxTextExtent];
 736
 737   (void) FormatMagickSize(size,MagickFalse,resource_request);
 738   if (resource_semaphore == (SemaphoreInfo *) NULL)
 739     AcquireSemaphoreInfo(&resource_semaphore);
 740   LockSemaphoreInfo(resource_semaphore);
 741   switch (type)
 742   {
 743     case AreaResource:
 744     {
 745       resource_info.area=(MagickOffsetType) size;
 746       (void) FormatMagickSize((MagickSizeType) resource_info.area,MagickFalse,
 747         resource_current);
 748       (void) FormatMagickSize(resource_info.area_limit,MagickFalse,
 749         resource_limit);
 750       break;
 751     }
 752     case MemoryResource:
 753     {
 754       resource_info.memory-=size;
 755       (void) FormatMagickSize((MagickSizeType) resource_info.memory,
 756         MagickTrue,resource_current);
 757       (void) FormatMagickSize(resource_info.memory_limit,MagickTrue,
 758         resource_limit);
 759       break;
 760     }
 761     case MapResource:
 762     {
 763       resource_info.map-=size;
 764       (void) FormatMagickSize((MagickSizeType) resource_info.map,MagickTrue,
 765         resource_current);
 766       (void) FormatMagickSize(resource_info.map_limit,MagickTrue,
 767         resource_limit);
 768       break;
 769     }
 770     case DiskResource:
 771     {
 772       resource_info.disk-=size;
 773       (void) FormatMagickSize((MagickSizeType) resource_info.disk,MagickTrue,
 774         resource_current);
 775       (void) FormatMagickSize(resource_info.disk_limit,MagickTrue,
 776         resource_limit);
 777       break;
 778     }
 779     case FileResource:
 780     {
 781       resource_info.file-=size;
 782       (void) FormatMagickSize((MagickSizeType) resource_info.file,MagickFalse,
 783         resource_current);
 784       (void) FormatMagickSize((MagickSizeType) resource_info.file_limit,
 785         MagickFalse,resource_limit);
 786       break;
 787     }
 788     case ThreadResource:
 789     {
 790       resource_info.thread-=size;
 791       (void) FormatMagickSize((MagickSizeType) resource_info.thread,MagickFalse,
 792         resource_current);
 793       (void) FormatMagickSize((MagickSizeType) resource_info.thread_limit,
 794         MagickFalse,resource_limit);
 795       break;
 796     }
 797     case TimeResource:
 798     {
 799       resource_info.time-=size;
 800       (void) FormatMagickSize((MagickSizeType) resource_info.time,MagickFalse,
 801         resource_current);
 802       (void) FormatMagickSize((MagickSizeType) resource_info.time_limit,
 803         MagickFalse,resource_limit);
 804       break;
 805     }
 806     default:
 807       break;
 808   }
 809   UnlockSemaphoreInfo(resource_semaphore);
 810   (void) LogMagickEvent(ResourceEvent,GetMagickModule(),"%s: %s/%s/%s",
 811     MagickOptionToMnemonic(MagickResourceOptions,(ssize_t) type),
 812       resource_request,resource_current,resource_limit);
 813 }
 814 \f
 815 /*
 816 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 817 %                                                                             %
 818 %                                                                             %
 819 %                                                                             %
 820 %    R e l i n q u i s h U n i q u e F i l e R e s o u r c e                  %
 821 %                                                                             %
 822 %                                                                             %
 823 %                                                                             %
 824 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 825 %
 826 %  RelinquishUniqueFileResource() relinquishes a unique file resource.
 827 %
 828 %  The format of the RelinquishUniqueFileResource() method is:
 829 %
 830 %      MagickBooleanType RelinquishUniqueFileResource(const char *path)
 831 %
 832 %  A description of each parameter follows:
 833 %
 834 %    o name: the name of the temporary resource.
 835 %
 836 */
 837 MagickExport MagickBooleanType RelinquishUniqueFileResource(const char *path)
 838 {
 839   char
 840     cache_path[MaxTextExtent];
 841
 842   assert(path != (const char *) NULL);
 843   (void) LogMagickEvent(ResourceEvent,GetMagickModule(),"%s",path);
 844   if (temporary_resources != (SplayTreeInfo *) NULL)
 845     {
 846       register char
 847         *p;
 848
 849       ResetSplayTreeIterator(temporary_resources);
 850       p=(char *) GetNextKeyInSplayTree(temporary_resources);
 851       while (p != (char *) NULL)
 852       {
 853         if (LocaleCompare(p,path) == 0)
 854           break;
 855         p=(char *) GetNextKeyInSplayTree(temporary_resources);
 856       }
 857       if (p != (char *) NULL)
 858         (void) DeleteNodeFromSplayTree(temporary_resources,p);
 859     }
 860   (void) CopyMagickString(cache_path,path,MaxTextExtent);
 861   AppendImageFormat("cache",cache_path);
 862   (void) remove(cache_path);
 863   return(remove(path) == 0 ? MagickTrue : MagickFalse);
 864 }
 865 \f
 866 /*
 867 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 868 %                                                                             %
 869 %                                                                             %
 870 %                                                                             %
 871 +   R e s o u r c e C o m p o n e n t G e n e s i s                           %
 872 %                                                                             %
 873 %                                                                             %
 874 %                                                                             %
 875 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 876 %
 877 %  ResourceComponentGenesis() instantiates the resource component.
 878 %
 879 %  The format of the ResourceComponentGenesis method is:
 880 %
 881 %      MagickBooleanType ResourceComponentGenesis(void)
 882 %
 883 */
 884
 885 static inline size_t MagickMax(const size_t x,const size_t y)
 886 {
 887   if (x > y)
 888     return(x);
 889   return(y);
 890 }
 891
 892 static inline MagickSizeType StringToSizeType(const char *string,
 893   const double interval)
 894 {
 895   double
 896     value;
 897
 898   value=SiPrefixToDouble(string,interval);
 899   if (value >= (double) MagickULLConstant(~0))
 900     return(MagickULLConstant(~0));
 901   return((MagickSizeType) value);
 902 }
 903
 904 MagickExport MagickBooleanType ResourceComponentGenesis(void)
 905 {
 906   char
 907     *limit;
 908
 909   MagickSizeType
 910     memory;
 911
 912   ssize_t
 913     files,
 914     pages,
 915     pagesize;
 916
 917   /*
 918     Set Magick resource limits.
 919   */
 920   AcquireSemaphoreInfo(&resource_semaphore);
 921   pagesize=GetMagickPageSize();
 922   pages=(-1);
 923 #if defined(MAGICKCORE_HAVE_SYSCONF) && defined(_SC_PHYS_PAGES)
 924   pages=(ssize_t) sysconf(_SC_PHYS_PAGES);
 925 #endif
 926   memory=(MagickSizeType) pages*pagesize;
 927   if ((pagesize <= 0) || (pages <= 0))
 928     memory=2048UL*1024UL*1024UL;
 929 #if defined(PixelCacheThreshold)
 930   memory=PixelCacheThreshold;
 931 #endif
 932   (void) SetMagickResourceLimit(AreaResource,2*memory/sizeof(PixelPacket));
 933   (void) SetMagickResourceLimit(MemoryResource,memory);
 934   (void) SetMagickResourceLimit(MapResource,2*memory);
 935   limit=GetEnvironmentValue("MAGICK_AREA_LIMIT");
 936   if (limit == (char *) NULL)
 937     limit=GetPolicyValue("area");
 938   if (limit != (char *) NULL)
 939     {
 940       (void) SetMagickResourceLimit(AreaResource,StringToSizeType(limit,100.0));
 941       limit=DestroyString(limit);
 942     }
 943   limit=GetEnvironmentValue("MAGICK_MEMORY_LIMIT");
 944   if (limit == (char *) NULL)
 945     limit=GetPolicyValue("memory");
 946   if (limit != (char *) NULL)
 947     {
 948       (void) SetMagickResourceLimit(MemoryResource,
 949         StringToSizeType(limit,100.0));
 950       limit=DestroyString(limit);
 951     }
 952   limit=GetEnvironmentValue("MAGICK_MAP_LIMIT");
 953   if (limit == (char *) NULL)
 954     limit=GetPolicyValue("map");
 955   if (limit != (char *) NULL)
 956     {
 957       (void) SetMagickResourceLimit(MapResource,StringToSizeType(limit,100.0));
 958       limit=DestroyString(limit);
 959     }
 960   limit=GetEnvironmentValue("MAGICK_DISK_LIMIT");
 961   if (limit == (char *) NULL)
 962     limit=GetPolicyValue("disk");
 963   if (limit != (char *) NULL)
 964     {
 965       (void) SetMagickResourceLimit(DiskResource,StringToSizeType(limit,100.0));
 966       limit=DestroyString(limit);
 967     }
 968   files=(-1);
 969 #if defined(MAGICKCORE_HAVE_SYSCONF) && defined(_SC_OPEN_MAX)
 970   files=(ssize_t) sysconf(_SC_OPEN_MAX);
 971 #endif
 972 #if defined(MAGICKCORE_HAVE_GETRLIMIT) && defined(RLIMIT_NOFILE)
 973   if (files < 0)
 974     {
 975       struct rlimit
 976         resources;
 977
 978       if (getrlimit(RLIMIT_NOFILE,&resources) != -1)
 979         files=(ssize_t) resources.rlim_cur;
 980   }
 981 #endif
 982 #if defined(MAGICKCORE_HAVE_GETDTABLESIZE) && defined(MAGICKCORE_POSIX_SUPPORT)
 983   if (files < 0)
 984     files=(ssize_t) getdtablesize();
 985 #endif
 986   if (files < 0)
 987     files=64;
 988   (void) SetMagickResourceLimit(FileResource,MagickMax((size_t)
 989     (3*files/4),64));
 990   limit=GetEnvironmentValue("MAGICK_FILE_LIMIT");
 991   if (limit == (char *) NULL)
 992     limit=GetPolicyValue("file");
 993   if (limit != (char *) NULL)
 994     {
 995       (void) SetMagickResourceLimit(FileResource,StringToSizeType(limit,100.0));
 996       limit=DestroyString(limit);
 997     }
 998   (void) SetMagickResourceLimit(ThreadResource,GetOpenMPMaximumThreads());
 999   limit=GetEnvironmentValue("MAGICK_THREAD_LIMIT");
1000   if (limit == (char *) NULL)
1001     limit=GetPolicyValue("thread");
1002   if (limit != (char *) NULL)
1003     {
1004       (void) SetMagickResourceLimit(ThreadResource,StringToSizeType(limit,
1005         100.0));
1006       limit=DestroyString(limit);
1007     }
1008   limit=GetEnvironmentValue("MAGICK_TIME_LIMIT");
1009   if (limit == (char *) NULL)
1010     limit=GetPolicyValue("time");
1011   if (limit != (char *) NULL)
1012     {
1013       (void) SetMagickResourceLimit(TimeResource,StringToSizeType(limit,100.0));
1014       limit=DestroyString(limit);
1015     }
1016   return(MagickTrue);
1017 }
1018 \f
1019 /*
1020 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1021 %                                                                             %
1022 %                                                                             %
1023 %                                                                             %
1024 +   R e s o u r c e C o m p o n e n t T e r m i n u s                         %
1025 %                                                                             %
1026 %                                                                             %
1027 %                                                                             %
1028 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1029 %
1030 %  ResourceComponentTerminus() destroys the resource component.
1031 %
1032 %  The format of the ResourceComponentTerminus() method is:
1033 %
1034 %      ResourceComponentTerminus(void)
1035 %
1036 */
1037 MagickExport void ResourceComponentTerminus(void)
1038 {
1039   if (resource_semaphore == (SemaphoreInfo *) NULL)
1040     AcquireSemaphoreInfo(&resource_semaphore);
1041   LockSemaphoreInfo(resource_semaphore);
1042   if (temporary_resources != (SplayTreeInfo *) NULL)
1043     temporary_resources=DestroySplayTree(temporary_resources);
1044   if (random_info != (RandomInfo *) NULL)
1045     random_info=DestroyRandomInfo(random_info);
1046   UnlockSemaphoreInfo(resource_semaphore);
1047   DestroySemaphoreInfo(&resource_semaphore);
1048 }
1049 \f
1050 /*
1051 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1052 %                                                                             %
1053 %                                                                             %
1054 %                                                                             %
1055 %   S e t M a g i c k R e s o u r c e L i m i t                               %
1056 %                                                                             %
1057 %                                                                             %
1058 %                                                                             %
1059 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1060 %
1061 %  SetMagickResourceLimit() sets the limit for a particular resource.
1062 %
1063 %  The format of the SetMagickResourceLimit() method is:
1064 %
1065 %      MagickBooleanType SetMagickResourceLimit(const ResourceType type,
1066 %        const MagickSizeType limit)
1067 %
1068 %  A description of each parameter follows:
1069 %
1070 %    o type: the type of resource.
1071 %
1072 %    o limit: the maximum limit for the resource.
1073 %
1074 */
1075
1076 static inline MagickSizeType MagickMin(const MagickSizeType x,
1077   const MagickSizeType y)
1078 {
1079   if (x < y)
1080     return(x);
1081   return(y);
1082 }
1083
1084 MagickExport MagickBooleanType SetMagickResourceLimit(const ResourceType type,
1085   const MagickSizeType limit)
1086 {
1087   char
1088     *value;
1089
1090   if (resource_semaphore == (SemaphoreInfo *) NULL)
1091     AcquireSemaphoreInfo(&resource_semaphore);
1092   LockSemaphoreInfo(resource_semaphore);
1093   switch (type)
1094   {
1095     case AreaResource:
1096     {
1097       resource_info.area_limit=limit;
1098       value=GetPolicyValue("area");
1099       if (value != (char *) NULL)
1100         resource_info.area_limit=MagickMin(limit,StringToSizeType(value,100.0));
1101       break;
1102     }
1103     case MemoryResource:
1104     {
1105       resource_info.memory_limit=limit;
1106       value=GetPolicyValue("memory");
1107       if (value != (char *) NULL)
1108         resource_info.memory_limit=MagickMin(limit,StringToSizeType(value,
1109           100.0));
1110       break;
1111     }
1112     case MapResource:
1113     {
1114       resource_info.map_limit=limit;
1115       value=GetPolicyValue("map");
1116       if (value != (char *) NULL)
1117         resource_info.map_limit=MagickMin(limit,StringToSizeType(value,100.0));
1118       break;
1119     }
1120     case DiskResource:
1121     {
1122       resource_info.disk_limit=limit;
1123       value=GetPolicyValue("disk");
1124       if (value != (char *) NULL)
1125         resource_info.disk_limit=MagickMin(limit,StringToSizeType(value,100.0));
1126       break;
1127     }
1128     case FileResource:
1129     {
1130       resource_info.file_limit=limit;
1131       value=GetPolicyValue("file");
1132       if (value != (char *) NULL)
1133         resource_info.file_limit=MagickMin(limit,StringToSizeType(value,100.0));
1134       break;
1135     }
1136     case ThreadResource:
1137     {
1138       resource_info.thread_limit=limit;
1139       value=GetPolicyValue("thread");
1140       if (value != (char *) NULL)
1141         resource_info.thread_limit=MagickMin(limit,StringToSizeType(value,
1142           100.0));
1143       SetOpenMPMaximumThreads((int) resource_info.thread_limit);
1144       break;
1145     }
1146     case TimeResource:
1147     {
1148       resource_info.time_limit=limit;
1149       value=GetPolicyValue("time");
1150       if (value != (char *) NULL)
1151         resource_info.time_limit=MagickMin(limit,StringToSizeType(value,100.0));
1152       break;
1153     }
1154     default:
1155       break;
1156   }
1157   UnlockSemaphoreInfo(resource_semaphore);
1158   return(MagickTrue);
1159 }