granicus.if.org Git - imagemagick/blob - MagickCore/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 %                                   Cristy                                    %
  17 %                               September 2002                                %
  18 %                                                                             %
  19 %                                                                             %
  20 %  Copyright 1999-2014 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 "MagickCore/studio.h"
  43 #include "MagickCore/cache.h"
  44 #include "MagickCore/configure.h"
  45 #include "MagickCore/exception.h"
  46 #include "MagickCore/exception-private.h"
  47 #include "MagickCore/hashmap.h"
  48 #include "MagickCore/log.h"
  49 #include "MagickCore/image.h"
  50 #include "MagickCore/memory_.h"
  51 #include "MagickCore/nt-base-private.h"
  52 #include "MagickCore/option.h"
  53 #include "MagickCore/policy.h"
  54 #include "MagickCore/random_.h"
  55 #include "MagickCore/registry.h"
  56 #include "MagickCore/resource_.h"
  57 #include "MagickCore/resource-private.h"
  58 #include "MagickCore/semaphore.h"
  59 #include "MagickCore/signature-private.h"
  60 #include "MagickCore/string_.h"
  61 #include "MagickCore/string-private.h"
  62 #include "MagickCore/splay-tree.h"
  63 #include "MagickCore/thread-private.h"
  64 #include "MagickCore/token.h"
  65 #include "MagickCore/utility.h"
  66 #include "MagickCore/utility-private.h"
  67 \f
  68 /*
  69   Typedef declarations.
  70 */
  71 typedef struct _ResourceInfo
  72 {
  73   MagickOffsetType
  74     area,
  75     memory,
  76     map,
  77     disk,
  78     file,
  79     thread,
  80     throttle,
  81     time;
  82
  83   MagickSizeType
  84     area_limit,
  85     memory_limit,
  86     map_limit,
  87     disk_limit,
  88     file_limit,
  89     thread_limit,
  90     throttle_limit,
  91     time_limit;
  92 } ResourceInfo;
  93 \f
  94 /*
  95   Global declarations.
  96 */
  97 static RandomInfo
  98   *random_info = (RandomInfo *) NULL;
  99
 100 static ResourceInfo
 101   resource_info =
 102   {
 103     MagickULLConstant(0),              /* initial area */
 104     MagickULLConstant(0),              /* initial memory */
 105     MagickULLConstant(0),              /* initial map */
 106     MagickULLConstant(0),              /* initial disk */
 107     MagickULLConstant(0),              /* initial file */
 108     MagickULLConstant(0),              /* initial thread */
 109     MagickULLConstant(0),              /* initial throttle */
 110     MagickULLConstant(0),              /* initial time */
 111     MagickULLConstant(3072)*1024*1024, /* area limit */
 112     MagickULLConstant(1536)*1024*1024, /* memory limit */
 113     MagickULLConstant(3072)*1024*1024, /* map limit */
 114     MagickResourceInfinity,            /* disk limit */
 115     MagickULLConstant(768),            /* file limit */
 116     MagickULLConstant(1),              /* thread limit */
 117     MagickULLConstant(0),              /* throttle limit */
 118     MagickResourceInfinity             /* time limit */
 119   };
 120
 121 static SemaphoreInfo
 122   *resource_semaphore = (SemaphoreInfo *) NULL;
 123
 124 static SplayTreeInfo
 125   *temporary_resources = (SplayTreeInfo *) NULL;
 126 \f
 127 /*
 128 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 129 %                                                                             %
 130 %                                                                             %
 131 %                                                                             %
 132 %   A c q u i r e M a g i c k R e s o u r c e                                 %
 133 %                                                                             %
 134 %                                                                             %
 135 %                                                                             %
 136 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 137 %
 138 %  AcquireMagickResource() acquires resources of the specified type.
 139 %  MagickFalse is returned if the specified resource is exhausted otherwise
 140 %  MagickTrue.
 141 %
 142 %  The format of the AcquireMagickResource() method is:
 143 %
 144 %      MagickBooleanType AcquireMagickResource(const ResourceType type,
 145 %        const MagickSizeType size)
 146 %
 147 %  A description of each parameter follows:
 148 %
 149 %    o type: the type of resource.
 150 %
 151 %    o size: the number of bytes needed from for this resource.
 152 %
 153 */
 154 MagickExport MagickBooleanType AcquireMagickResource(const ResourceType type,
 155   const MagickSizeType size)
 156 {
 157   char
 158     resource_current[MaxTextExtent],
 159     resource_limit[MaxTextExtent],
 160     resource_request[MaxTextExtent];
 161
 162   MagickBooleanType
 163     status;
 164
 165   MagickSizeType
 166     limit;
 167
 168   status=MagickFalse;
 169   (void) FormatMagickSize(size,MagickFalse,resource_request);
 170   if (resource_semaphore == (SemaphoreInfo *) NULL)
 171     ActivateSemaphoreInfo(&resource_semaphore);
 172   LockSemaphoreInfo(resource_semaphore);
 173   switch (type)
 174   {
 175     case AreaResource:
 176     {
 177       resource_info.area=(MagickOffsetType) size;
 178       limit=resource_info.area_limit;
 179       status=(resource_info.area_limit == MagickResourceInfinity) ||
 180         (size < limit) ? MagickTrue : MagickFalse;
 181       (void) FormatMagickSize((MagickSizeType) resource_info.area,MagickFalse,
 182         resource_current);
 183       (void) FormatMagickSize(resource_info.area_limit,MagickFalse,
 184         resource_limit);
 185       break;
 186     }
 187     case MemoryResource:
 188     {
 189       resource_info.memory+=size;
 190       limit=resource_info.memory_limit;
 191       status=(resource_info.memory_limit == MagickResourceInfinity) ||
 192         ((MagickSizeType) resource_info.memory < limit) ? MagickTrue :
 193         MagickFalse;
 194       (void) FormatMagickSize((MagickSizeType) resource_info.memory,MagickTrue,
 195         resource_current);
 196       (void) FormatMagickSize(resource_info.memory_limit,MagickTrue,
 197         resource_limit);
 198       break;
 199     }
 200     case MapResource:
 201     {
 202       resource_info.map+=size;
 203       limit=resource_info.map_limit;
 204       status=(resource_info.map_limit == MagickResourceInfinity) ||
 205         ((MagickSizeType) resource_info.map < limit) ? MagickTrue : MagickFalse;
 206       (void) FormatMagickSize((MagickSizeType) resource_info.map,MagickTrue,
 207         resource_current);
 208       (void) FormatMagickSize(resource_info.map_limit,MagickTrue,
 209         resource_limit);
 210       break;
 211     }
 212     case DiskResource:
 213     {
 214       resource_info.disk+=size;
 215       limit=resource_info.disk_limit;
 216       status=(resource_info.disk_limit == MagickResourceInfinity) ||
 217         ((MagickSizeType) resource_info.disk < limit) ? MagickTrue :
 218         MagickFalse;
 219       (void) FormatMagickSize((MagickSizeType) resource_info.disk,MagickTrue,
 220         resource_current);
 221       (void) FormatMagickSize(resource_info.disk_limit,MagickTrue,
 222         resource_limit);
 223       break;
 224     }
 225     case FileResource:
 226     {
 227       resource_info.file+=size;
 228       limit=resource_info.file_limit;
 229       status=(resource_info.file_limit == MagickResourceInfinity) ||
 230         ((MagickSizeType) resource_info.file < limit) ?
 231         MagickTrue : MagickFalse;
 232       (void) FormatMagickSize((MagickSizeType) resource_info.file,MagickFalse,
 233         resource_current);
 234       (void) FormatMagickSize((MagickSizeType) resource_info.file_limit,
 235         MagickFalse,resource_limit);
 236       break;
 237     }
 238     case ThreadResource:
 239     {
 240       limit=resource_info.thread_limit;
 241       status=(resource_info.thread_limit == MagickResourceInfinity) ||
 242         ((MagickSizeType) resource_info.thread < limit) ?
 243         MagickTrue : MagickFalse;
 244       (void) FormatMagickSize((MagickSizeType) resource_info.thread,MagickFalse,
 245         resource_current);
 246       (void) FormatMagickSize((MagickSizeType) resource_info.thread_limit,
 247         MagickFalse,resource_limit);
 248       break;
 249     }
 250     case ThrottleResource:
 251     {
 252       limit=resource_info.throttle_limit;
 253       status=(resource_info.throttle_limit == MagickResourceInfinity) ||
 254         ((MagickSizeType) resource_info.throttle < limit) ?
 255         MagickTrue : MagickFalse;
 256       (void) FormatMagickSize((MagickSizeType) resource_info.throttle,
 257         MagickFalse,resource_current);
 258       (void) FormatMagickSize((MagickSizeType) resource_info.throttle_limit,
 259         MagickFalse,resource_limit);
 260       break;
 261     }
 262     case TimeResource:
 263     {
 264       resource_info.time+=size;
 265       limit=resource_info.time_limit;
 266       status=(resource_info.time_limit == MagickResourceInfinity) ||
 267         ((MagickSizeType) resource_info.time < limit) ?
 268         MagickTrue : MagickFalse;
 269       (void) FormatMagickSize((MagickSizeType) resource_info.time,MagickFalse,
 270         resource_current);
 271       (void) FormatMagickSize((MagickSizeType) resource_info.time_limit,
 272         MagickFalse,resource_limit);
 273       break;
 274     }
 275     default:
 276       break;
 277   }
 278   UnlockSemaphoreInfo(resource_semaphore);
 279   (void) LogMagickEvent(ResourceEvent,GetMagickModule(),"%s: %s/%s/%s",
 280     CommandOptionToMnemonic(MagickResourceOptions,(ssize_t) type),
 281     resource_request,resource_current,resource_limit);
 282   return(status);
 283 }
 284 \f
 285 /*
 286 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 287 %                                                                             %
 288 %                                                                             %
 289 %                                                                             %
 290 +   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 %
 291 %                                                                             %
 292 %                                                                             %
 293 %                                                                             %
 294 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 295 %
 296 %  AsynchronousResourceComponentTerminus() destroys the resource environment.
 297 %  It differs from ResourceComponentTerminus() in that it can be called from a
 298 %  asynchronous signal handler.
 299 %
 300 %  The format of the ResourceComponentTerminus() method is:
 301 %
 302 %      ResourceComponentTerminus(void)
 303 %
 304 */
 305 MagickPrivate void AsynchronousResourceComponentTerminus(void)
 306 {
 307   const char
 308     *path;
 309
 310   if (temporary_resources == (SplayTreeInfo *) NULL)
 311     return;
 312   /*
 313     Remove any lingering temporary files.
 314   */
 315   ResetSplayTreeIterator(temporary_resources);
 316   path=(const char *) GetNextKeyInSplayTree(temporary_resources);
 317   while (path != (const char *) NULL)
 318   {
 319     (void) ShredFile(path);
 320     path=(const char *) GetNextKeyInSplayTree(temporary_resources);
 321   }
 322 }
 323 \f
 324 /*
 325 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 326 %                                                                             %
 327 %                                                                             %
 328 %                                                                             %
 329 %   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                         %
 330 %                                                                             %
 331 %                                                                             %
 332 %                                                                             %
 333 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 334 %
 335 %  AcquireUniqueFileResource() returns a unique file name, and returns a file
 336 %  descriptor for the file open for reading and writing.
 337 %
 338 %  The format of the AcquireUniqueFileResource() method is:
 339 %
 340 %      int AcquireUniqueFileResource(char *path)
 341 %
 342 %  A description of each parameter follows:
 343 %
 344 %   o  path:  Specifies a pointer to an array of characters.  The unique path
 345 %      name is returned in this array.
 346 %
 347 */
 348
 349 static void *DestroyTemporaryResources(void *temporary_resource)
 350 {
 351   (void) ShredFile((char *) temporary_resource);
 352   temporary_resource=DestroyString((char *) temporary_resource);
 353   return((void *) NULL);
 354 }
 355
 356 MagickExport MagickBooleanType GetPathTemplate(char *path)
 357 {
 358   char
 359     *directory,
 360     *value;
 361
 362   ExceptionInfo
 363     *exception;
 364
 365   MagickBooleanType
 366     status;
 367
 368   struct stat
 369     attributes;
 370
 371   (void) FormatLocaleString(path,MaxTextExtent,"magick-%.20gXXXXXXXXXXXX",
 372     (double) getpid());
 373   exception=AcquireExceptionInfo();
 374   directory=(char *) GetImageRegistry(StringRegistryType,"temporary-path",
 375     exception);
 376   exception=DestroyExceptionInfo(exception);
 377   if (directory == (char *) NULL)
 378     directory=GetEnvironmentValue("MAGICK_TEMPORARY_PATH");
 379   if (directory == (char *) NULL)
 380     directory=GetEnvironmentValue("MAGICK_TMPDIR");
 381   if (directory == (char *) NULL)
 382     directory=GetEnvironmentValue("TMPDIR");
 383 #if defined(MAGICKCORE_WINDOWS_SUPPORT) || defined(__OS2__)
 384   if (directory == (char *) NULL)
 385     directory=GetEnvironmentValue("TMP");
 386   if (directory == (char *) NULL)
 387     directory=GetEnvironmentValue("TEMP");
 388 #endif
 389 #if defined(__VMS)
 390   if (directory == (char *) NULL)
 391     directory=GetEnvironmentValue("MTMPDIR");
 392 #endif
 393 #if defined(P_tmpdir)
 394   if (directory == (char *) NULL)
 395     directory=ConstantString(P_tmpdir);
 396 #endif
 397   if (directory == (char *) NULL)
 398     return(MagickTrue);
 399   value=GetPolicyValue("temporary-path");
 400   if (value != (char *) NULL)
 401     (void) CloneString(&directory,value);
 402   if (strlen(directory) > (MaxTextExtent-25))
 403     {
 404       directory=DestroyString(directory);
 405       return(MagickFalse);
 406     }
 407   status=GetPathAttributes(directory,&attributes);
 408   if ((status == MagickFalse) || !S_ISDIR(attributes.st_mode))
 409     {
 410       directory=DestroyString(directory);
 411       return(MagickFalse);
 412     }
 413   if (directory[strlen(directory)-1] == *DirectorySeparator)
 414     (void) FormatLocaleString(path,MaxTextExtent,"%smagick-%.20gXXXXXXXXXXXX",
 415       directory,(double) getpid());
 416   else
 417     (void) FormatLocaleString(path,MaxTextExtent,"%s%smagick-%.20gXXXXXXXXXXXX",
 418       directory,DirectorySeparator,(double) getpid());
 419   directory=DestroyString(directory);
 420   return(MagickTrue);
 421 }
 422
 423 MagickExport int AcquireUniqueFileResource(char *path)
 424 {
 425 #if !defined(O_NOFOLLOW)
 426 #define O_NOFOLLOW 0
 427 #endif
 428 #if !defined(TMP_MAX)
 429 # define TMP_MAX  238328
 430 #endif
 431
 432   int
 433     c,
 434     file;
 435
 436   register char
 437     *p;
 438
 439   register ssize_t
 440     i;
 441
 442   static const char
 443     portable_filename[65] =
 444       "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789_-";
 445
 446   StringInfo
 447     *key;
 448
 449   unsigned char
 450     *datum;
 451
 452   assert(path != (char *) NULL);
 453   (void) LogMagickEvent(ResourceEvent,GetMagickModule(),"...");
 454   if (random_info == (RandomInfo *) NULL)
 455     random_info=AcquireRandomInfo();
 456   file=(-1);
 457   for (i=0; i < (ssize_t) TMP_MAX; i++)
 458   {
 459     /*
 460       Get temporary pathname.
 461     */
 462     (void) GetPathTemplate(path);
 463     key=GetRandomKey(random_info,6);
 464     p=path+strlen(path)-12;
 465     datum=GetStringInfoDatum(key);
 466     for (i=0; i < (ssize_t) GetStringInfoLength(key); i++)
 467     {
 468       c=(int) (datum[i] & 0x3f);
 469       *p++=portable_filename[c];
 470     }
 471     key=DestroyStringInfo(key);
 472 #if defined(MAGICKCORE_HAVE_MKSTEMP)
 473     file=mkstemp(path);
 474 #if defined(__OS2__)
 475     setmode(file,O_BINARY);
 476 #endif
 477     if (file != -1)
 478       break;
 479 #endif
 480     key=GetRandomKey(random_info,12);
 481     p=path+strlen(path)-12;
 482     datum=GetStringInfoDatum(key);
 483     for (i=0; i < (ssize_t) GetStringInfoLength(key); i++)
 484     {
 485       c=(int) (datum[i] & 0x3f);
 486       *p++=portable_filename[c];
 487     }
 488     key=DestroyStringInfo(key);
 489     file=open_utf8(path,O_RDWR | O_CREAT | O_EXCL | O_BINARY | O_NOFOLLOW,
 490       S_MODE);
 491     if ((file >= 0) || (errno != EEXIST))
 492       break;
 493   }
 494   (void) LogMagickEvent(ResourceEvent,GetMagickModule(),"%s",path);
 495   if (file == -1)
 496     return(file);
 497   if (resource_semaphore == (SemaphoreInfo *) NULL)
 498     ActivateSemaphoreInfo(&resource_semaphore);
 499   LockSemaphoreInfo(resource_semaphore);
 500   if (temporary_resources == (SplayTreeInfo *) NULL)
 501     temporary_resources=NewSplayTree(CompareSplayTreeString,
 502       DestroyTemporaryResources,(void *(*)(void *)) NULL);
 503   UnlockSemaphoreInfo(resource_semaphore);
 504   (void) AddValueToSplayTree(temporary_resources,ConstantString(path),
 505     (const void *) NULL);
 506   return(file);
 507 }
 508 \f
 509 /*
 510 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 511 %                                                                             %
 512 %                                                                             %
 513 %                                                                             %
 514 %   G e t M a g i c k R e s o u r c e                                         %
 515 %                                                                             %
 516 %                                                                             %
 517 %                                                                             %
 518 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 519 %
 520 %  GetMagickResource() returns the specified resource.
 521 %
 522 %  The format of the GetMagickResource() method is:
 523 %
 524 %      MagickSizeType GetMagickResource(const ResourceType type)
 525 %
 526 %  A description of each parameter follows:
 527 %
 528 %    o type: the type of resource.
 529 %
 530 */
 531 MagickExport MagickSizeType GetMagickResource(const ResourceType type)
 532 {
 533   MagickSizeType
 534     resource;
 535
 536   resource=0;
 537   LockSemaphoreInfo(resource_semaphore);
 538   switch (type)
 539   {
 540     case AreaResource:
 541     {
 542       resource=(MagickSizeType) resource_info.area;
 543       break;
 544     }
 545     case MemoryResource:
 546     {
 547       resource=(MagickSizeType) resource_info.memory;
 548       break;
 549     }
 550     case MapResource:
 551     {
 552       resource=(MagickSizeType) resource_info.map;
 553       break;
 554     }
 555     case DiskResource:
 556     {
 557       resource=(MagickSizeType) resource_info.disk;
 558       break;
 559     }
 560     case FileResource:
 561     {
 562       resource=(MagickSizeType) resource_info.file;
 563       break;
 564     }
 565     case ThreadResource:
 566     {
 567       resource=(MagickSizeType) resource_info.thread;
 568       break;
 569     }
 570     case ThrottleResource:
 571     {
 572       resource=(MagickSizeType) resource_info.throttle;
 573       break;
 574     }
 575     case TimeResource:
 576     {
 577       resource=(MagickSizeType) resource_info.time;
 578       break;
 579     }
 580     default:
 581       break;
 582   }
 583   UnlockSemaphoreInfo(resource_semaphore);
 584   return(resource);
 585 }
 586 \f
 587 /*
 588 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 589 %                                                                             %
 590 %                                                                             %
 591 %                                                                             %
 592 %   G e t M a g i c k R e s o u r c e L i m i t                               %
 593 %                                                                             %
 594 %                                                                             %
 595 %                                                                             %
 596 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 597 %
 598 %  GetMagickResourceLimit() returns the specified resource limit.
 599 %
 600 %  The format of the GetMagickResourceLimit() method is:
 601 %
 602 %      MagickSizeType GetMagickResourceLimit(const ResourceType type)
 603 %
 604 %  A description of each parameter follows:
 605 %
 606 %    o type: the type of resource.
 607 %
 608 */
 609 MagickExport MagickSizeType GetMagickResourceLimit(const ResourceType type)
 610 {
 611   MagickSizeType
 612     resource;
 613
 614   resource=0;
 615   if (resource_semaphore == (SemaphoreInfo *) NULL)
 616     ActivateSemaphoreInfo(&resource_semaphore);
 617   LockSemaphoreInfo(resource_semaphore);
 618   switch (type)
 619   {
 620     case AreaResource:
 621     {
 622       resource=resource_info.area_limit;
 623       break;
 624     }
 625     case MemoryResource:
 626     {
 627       resource=resource_info.memory_limit;
 628       break;
 629     }
 630     case MapResource:
 631     {
 632       resource=resource_info.map_limit;
 633       break;
 634     }
 635     case DiskResource:
 636     {
 637       resource=resource_info.disk_limit;
 638       break;
 639     }
 640     case FileResource:
 641     {
 642       resource=resource_info.file_limit;
 643       break;
 644     }
 645     case ThreadResource:
 646     {
 647       resource=resource_info.thread_limit;
 648       break;
 649     }
 650     case ThrottleResource:
 651     {
 652       resource=resource_info.throttle_limit;
 653       break;
 654     }
 655     case TimeResource:
 656     {
 657       resource=resource_info.time_limit;
 658       break;
 659     }
 660     default:
 661       break;
 662   }
 663   UnlockSemaphoreInfo(resource_semaphore);
 664   return(resource);
 665 }
 666 \f
 667 /*
 668 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 669 %                                                                             %
 670 %                                                                             %
 671 %                                                                             %
 672 %  L i s t M a g i c k R e s o u r c e I n f o                                %
 673 %                                                                             %
 674 %                                                                             %
 675 %                                                                             %
 676 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 677 %
 678 %  ListMagickResourceInfo() lists the resource info to a file.
 679 %
 680 %  The format of the ListMagickResourceInfo method is:
 681 %
 682 %      MagickBooleanType ListMagickResourceInfo(FILE *file,
 683 %        ExceptionInfo *exception)
 684 %
 685 %  A description of each parameter follows.
 686 %
 687 %    o file:  An pointer to a FILE.
 688 %
 689 %    o exception: return any errors or warnings in this structure.
 690 %
 691 */
 692 MagickExport MagickBooleanType ListMagickResourceInfo(FILE *file,
 693   ExceptionInfo *magick_unused(exception))
 694 {
 695   char
 696     area_limit[MaxTextExtent],
 697     disk_limit[MaxTextExtent],
 698     map_limit[MaxTextExtent],
 699     memory_limit[MaxTextExtent],
 700     time_limit[MaxTextExtent];
 701
 702   if (file == (const FILE *) NULL)
 703     file=stdout;
 704   if (resource_semaphore == (SemaphoreInfo *) NULL)
 705     ActivateSemaphoreInfo(&resource_semaphore);
 706   LockSemaphoreInfo(resource_semaphore);
 707   (void) FormatMagickSize(resource_info.area_limit,MagickFalse,area_limit);
 708   (void) FormatMagickSize(resource_info.memory_limit,MagickTrue,memory_limit);
 709   (void) FormatMagickSize(resource_info.map_limit,MagickTrue,map_limit);
 710   (void) CopyMagickString(disk_limit,"unlimited",MaxTextExtent);
 711   if (resource_info.disk_limit != MagickResourceInfinity)
 712     (void) FormatMagickSize(resource_info.disk_limit,MagickTrue,disk_limit);
 713   (void) CopyMagickString(time_limit,"unlimited",MaxTextExtent);
 714   if (resource_info.time_limit != MagickResourceInfinity)
 715     (void) FormatLocaleString(time_limit,MaxTextExtent,"%.20g",(double)
 716       ((MagickOffsetType) resource_info.time_limit));
 717   (void) FormatLocaleFile(file,"  File       Area     Memory        Map"
 718     "       Disk   Thread  Throttle       Time\n");
 719   (void) FormatLocaleFile(file,
 720     "--------------------------------------------------------"
 721     "------------------------\n");
 722   (void) FormatLocaleFile(file,"%6g %10s %10s %10s %10s %8g  %8g %10s\n",
 723     (double) ((MagickOffsetType) resource_info.file_limit),area_limit,
 724     memory_limit,map_limit,disk_limit,(double) ((MagickOffsetType)
 725     resource_info.thread_limit),(double) ((MagickOffsetType)
 726     resource_info.throttle_limit),time_limit);
 727   (void) fflush(file);
 728   UnlockSemaphoreInfo(resource_semaphore);
 729   return(MagickTrue);
 730 }
 731 \f
 732 /*
 733 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 734 %                                                                             %
 735 %                                                                             %
 736 %                                                                             %
 737 %   R e l i n q u i s h M a g i c k R e s o u r c e                           %
 738 %                                                                             %
 739 %                                                                             %
 740 %                                                                             %
 741 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 742 %
 743 %  RelinquishMagickResource() relinquishes resources of the specified type.
 744 %
 745 %  The format of the RelinquishMagickResource() method is:
 746 %
 747 %      void RelinquishMagickResource(const ResourceType type,
 748 %        const MagickSizeType size)
 749 %
 750 %  A description of each parameter follows:
 751 %
 752 %    o type: the type of resource.
 753 %
 754 %    o size: the size of the resource.
 755 %
 756 */
 757 MagickExport void RelinquishMagickResource(const ResourceType type,
 758   const MagickSizeType size)
 759 {
 760   char
 761     resource_current[MaxTextExtent],
 762     resource_limit[MaxTextExtent],
 763     resource_request[MaxTextExtent];
 764
 765   (void) FormatMagickSize(size,MagickFalse,resource_request);
 766   if (resource_semaphore == (SemaphoreInfo *) NULL)
 767                 ActivateSemaphoreInfo(&resource_semaphore);
 768   LockSemaphoreInfo(resource_semaphore);
 769   switch (type)
 770   {
 771     case AreaResource:
 772     {
 773       resource_info.area=(MagickOffsetType) size;
 774       (void) FormatMagickSize((MagickSizeType) resource_info.area,MagickFalse,
 775         resource_current);
 776       (void) FormatMagickSize(resource_info.area_limit,MagickFalse,
 777         resource_limit);
 778       break;
 779     }
 780     case MemoryResource:
 781     {
 782       resource_info.memory-=size;
 783       (void) FormatMagickSize((MagickSizeType) resource_info.memory,
 784         MagickTrue,resource_current);
 785       (void) FormatMagickSize(resource_info.memory_limit,MagickTrue,
 786         resource_limit);
 787       break;
 788     }
 789     case MapResource:
 790     {
 791       resource_info.map-=size;
 792       (void) FormatMagickSize((MagickSizeType) resource_info.map,MagickTrue,
 793         resource_current);
 794       (void) FormatMagickSize(resource_info.map_limit,MagickTrue,
 795         resource_limit);
 796       break;
 797     }
 798     case DiskResource:
 799     {
 800       resource_info.disk-=size;
 801       (void) FormatMagickSize((MagickSizeType) resource_info.disk,MagickTrue,
 802         resource_current);
 803       (void) FormatMagickSize(resource_info.disk_limit,MagickTrue,
 804         resource_limit);
 805       break;
 806     }
 807     case FileResource:
 808     {
 809       resource_info.file-=size;
 810       (void) FormatMagickSize((MagickSizeType) resource_info.file,MagickFalse,
 811         resource_current);
 812       (void) FormatMagickSize((MagickSizeType) resource_info.file_limit,
 813         MagickFalse,resource_limit);
 814       break;
 815     }
 816     case ThreadResource:
 817     {
 818       (void) FormatMagickSize((MagickSizeType) resource_info.thread,MagickFalse,
 819         resource_current);
 820       (void) FormatMagickSize((MagickSizeType) resource_info.thread_limit,
 821         MagickFalse,resource_limit);
 822       break;
 823     }
 824     case ThrottleResource:
 825     {
 826       (void) FormatMagickSize((MagickSizeType) resource_info.throttle,
 827         MagickFalse,resource_current);
 828       (void) FormatMagickSize((MagickSizeType) resource_info.throttle_limit,
 829         MagickFalse,resource_limit);
 830       break;
 831     }
 832     case TimeResource:
 833     {
 834       resource_info.time-=size;
 835       (void) FormatMagickSize((MagickSizeType) resource_info.time,MagickFalse,
 836         resource_current);
 837       (void) FormatMagickSize((MagickSizeType) resource_info.time_limit,
 838         MagickFalse,resource_limit);
 839       break;
 840     }
 841     default:
 842       break;
 843   }
 844   UnlockSemaphoreInfo(resource_semaphore);
 845   (void) LogMagickEvent(ResourceEvent,GetMagickModule(),"%s: %s/%s/%s",
 846     CommandOptionToMnemonic(MagickResourceOptions,(ssize_t) type),
 847       resource_request,resource_current,resource_limit);
 848 }
 849 \f
 850 /*
 851 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 852 %                                                                             %
 853 %                                                                             %
 854 %                                                                             %
 855 %    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                  %
 856 %                                                                             %
 857 %                                                                             %
 858 %                                                                             %
 859 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 860 %
 861 %  RelinquishUniqueFileResource() relinquishes a unique file resource.
 862 %
 863 %  The format of the RelinquishUniqueFileResource() method is:
 864 %
 865 %      MagickBooleanType RelinquishUniqueFileResource(const char *path)
 866 %
 867 %  A description of each parameter follows:
 868 %
 869 %    o name: the name of the temporary resource.
 870 %
 871 */
 872 MagickExport MagickBooleanType RelinquishUniqueFileResource(const char *path)
 873 {
 874   char
 875     cache_path[MaxTextExtent];
 876
 877   assert(path != (const char *) NULL);
 878   (void) LogMagickEvent(ResourceEvent,GetMagickModule(),"%s",path);
 879   if (temporary_resources != (SplayTreeInfo *) NULL)
 880     {
 881       register char
 882         *p;
 883
 884       ResetSplayTreeIterator(temporary_resources);
 885       p=(char *) GetNextKeyInSplayTree(temporary_resources);
 886       while (p != (char *) NULL)
 887       {
 888         if (LocaleCompare(p,path) == 0)
 889           break;
 890         p=(char *) GetNextKeyInSplayTree(temporary_resources);
 891       }
 892       if (p != (char *) NULL)
 893         (void) DeleteNodeFromSplayTree(temporary_resources,p);
 894     }
 895   (void) CopyMagickString(cache_path,path,MaxTextExtent);
 896   AppendImageFormat("cache",cache_path);
 897   (void) ShredFile(cache_path);
 898   return(ShredFile(path));
 899 }
 900 \f
 901 /*
 902 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 903 %                                                                             %
 904 %                                                                             %
 905 %                                                                             %
 906 +   R e s o u r c e C o m p o n e n t G e n e s i s                           %
 907 %                                                                             %
 908 %                                                                             %
 909 %                                                                             %
 910 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 911 %
 912 %  ResourceComponentGenesis() instantiates the resource component.
 913 %
 914 %  The format of the ResourceComponentGenesis method is:
 915 %
 916 %      MagickBooleanType ResourceComponentGenesis(void)
 917 %
 918 */
 919
 920 static inline size_t MagickMax(const size_t x,const size_t y)
 921 {
 922   if (x > y)
 923     return(x);
 924   return(y);
 925 }
 926
 927 static inline MagickSizeType StringToSizeType(const char *string,
 928   const double interval)
 929 {
 930   double
 931     value;
 932
 933   value=SiPrefixToDoubleInterval(string,interval);
 934   if (value >= (double) MagickULLConstant(~0))
 935     return(MagickULLConstant(~0));
 936   return((MagickSizeType) value);
 937 }
 938
 939 MagickPrivate MagickBooleanType ResourceComponentGenesis(void)
 940 {
 941   char
 942     *limit;
 943
 944   MagickSizeType
 945     memory;
 946
 947   ssize_t
 948     files,
 949     pages,
 950     pagesize;
 951
 952   /*
 953     Set Magick resource limits.
 954   */
 955   resource_semaphore=AcquireSemaphoreInfo();
 956   pagesize=GetMagickPageSize();
 957   pages=(-1);
 958 #if defined(MAGICKCORE_HAVE_SYSCONF) && defined(_SC_PHYS_PAGES)
 959   pages=(ssize_t) sysconf(_SC_PHYS_PAGES);
 960 #endif
 961   memory=(MagickSizeType) pages*pagesize;
 962   if ((pagesize <= 0) || (pages <= 0))
 963     memory=2048UL*1024UL*1024UL;
 964 #if defined(PixelCacheThreshold)
 965   memory=PixelCacheThreshold;
 966 #endif
 967   (void) SetMagickResourceLimit(AreaResource,2*memory);
 968   limit=GetEnvironmentValue("MAGICK_AREA_LIMIT");
 969   if (limit != (char *) NULL)
 970     {
 971       (void) SetMagickResourceLimit(AreaResource,StringToSizeType(limit,100.0));
 972       limit=DestroyString(limit);
 973     }
 974   (void) SetMagickResourceLimit(MemoryResource,memory);
 975   limit=GetEnvironmentValue("MAGICK_MEMORY_LIMIT");
 976   if (limit != (char *) NULL)
 977     {
 978       (void) SetMagickResourceLimit(MemoryResource,
 979         StringToSizeType(limit,100.0));
 980       limit=DestroyString(limit);
 981     }
 982   (void) SetMagickResourceLimit(MapResource,2*memory);
 983   limit=GetEnvironmentValue("MAGICK_MAP_LIMIT");
 984   if (limit != (char *) NULL)
 985     {
 986       (void) SetMagickResourceLimit(MapResource,StringToSizeType(limit,100.0));
 987       limit=DestroyString(limit);
 988     }
 989   (void) SetMagickResourceLimit(DiskResource,MagickResourceInfinity);
 990   limit=GetEnvironmentValue("MAGICK_DISK_LIMIT");
 991   if (limit != (char *) NULL)
 992     {
 993       (void) SetMagickResourceLimit(DiskResource,StringToSizeType(limit,100.0));
 994       limit=DestroyString(limit);
 995     }
 996   files=(-1);
 997 #if defined(MAGICKCORE_HAVE_SYSCONF) && defined(_SC_OPEN_MAX)
 998   files=(ssize_t) sysconf(_SC_OPEN_MAX);
 999 #endif
1000 #if defined(MAGICKCORE_HAVE_GETRLIMIT) && defined(RLIMIT_NOFILE)
1001   if (files < 0)
1002     {
1003       struct rlimit
1004         resources;
1005
1006       if (getrlimit(RLIMIT_NOFILE,&resources) != -1)
1007         files=(ssize_t) resources.rlim_cur;
1008   }
1009 #endif
1010 #if defined(MAGICKCORE_HAVE_GETDTABLESIZE) && defined(MAGICKCORE_POSIX_SUPPORT)
1011   if (files < 0)
1012     files=(ssize_t) getdtablesize();
1013 #endif
1014   if (files < 0)
1015     files=64;
1016   (void) SetMagickResourceLimit(FileResource,MagickMax((size_t)
1017     (3*files/4),64));
1018   limit=GetEnvironmentValue("MAGICK_FILE_LIMIT");
1019   if (limit != (char *) NULL)
1020     {
1021       (void) SetMagickResourceLimit(FileResource,StringToSizeType(limit,
1022         100.0));
1023       limit=DestroyString(limit);
1024     }
1025   (void) SetMagickResourceLimit(ThreadResource,GetOpenMPMaximumThreads());
1026   limit=GetEnvironmentValue("MAGICK_THREAD_LIMIT");
1027   if (limit != (char *) NULL)
1028     {
1029       (void) SetMagickResourceLimit(ThreadResource,StringToSizeType(limit,
1030         100.0));
1031       limit=DestroyString(limit);
1032     }
1033   (void) SetMagickResourceLimit(ThrottleResource,0);
1034   limit=GetEnvironmentValue("MAGICK_THROTTLE_LIMIT");
1035   if (limit != (char *) NULL)
1036     {
1037       (void) SetMagickResourceLimit(ThrottleResource,StringToSizeType(limit,
1038         100.0));
1039       limit=DestroyString(limit);
1040     }
1041   (void) SetMagickResourceLimit(TimeResource,MagickResourceInfinity);
1042   limit=GetEnvironmentValue("MAGICK_TIME_LIMIT");
1043   if (limit != (char *) NULL)
1044     {
1045       (void) SetMagickResourceLimit(TimeResource,StringToSizeType(limit,100.0));
1046       limit=DestroyString(limit);
1047     }
1048   return(MagickTrue);
1049 }
1050 \f
1051 /*
1052 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1053 %                                                                             %
1054 %                                                                             %
1055 %                                                                             %
1056 +   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                         %
1057 %                                                                             %
1058 %                                                                             %
1059 %                                                                             %
1060 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1061 %
1062 %  ResourceComponentTerminus() destroys the resource component.
1063 %
1064 %  The format of the ResourceComponentTerminus() method is:
1065 %
1066 %      ResourceComponentTerminus(void)
1067 %
1068 */
1069 MagickPrivate void ResourceComponentTerminus(void)
1070 {
1071   if (resource_semaphore == (SemaphoreInfo *) NULL)
1072     resource_semaphore=AcquireSemaphoreInfo();
1073   LockSemaphoreInfo(resource_semaphore);
1074   if (temporary_resources != (SplayTreeInfo *) NULL)
1075     temporary_resources=DestroySplayTree(temporary_resources);
1076   if (random_info != (RandomInfo *) NULL)
1077     random_info=DestroyRandomInfo(random_info);
1078   UnlockSemaphoreInfo(resource_semaphore);
1079   RelinquishSemaphoreInfo(&resource_semaphore);
1080 }
1081 \f
1082 /*
1083 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1084 %                                                                             %
1085 %                                                                             %
1086 %                                                                             %
1087 %   S e t M a g i c k R e s o u r c e L i m i t                               %
1088 %                                                                             %
1089 %                                                                             %
1090 %                                                                             %
1091 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1092 %
1093 %  SetMagickResourceLimit() sets the limit for a particular resource.
1094 %
1095 %  The format of the SetMagickResourceLimit() method is:
1096 %
1097 %      MagickBooleanType SetMagickResourceLimit(const ResourceType type,
1098 %        const MagickSizeType limit)
1099 %
1100 %  A description of each parameter follows:
1101 %
1102 %    o type: the type of resource.
1103 %
1104 %    o limit: the maximum limit for the resource.
1105 %
1106 */
1107
1108 static inline MagickSizeType MagickMin(const MagickSizeType x,
1109   const MagickSizeType y)
1110 {
1111   if (x < y)
1112     return(x);
1113   return(y);
1114 }
1115
1116 MagickExport MagickBooleanType SetMagickResourceLimit(const ResourceType type,
1117   const MagickSizeType limit)
1118 {
1119   char
1120     *value;
1121
1122   if (resource_semaphore == (SemaphoreInfo *) NULL)
1123     resource_semaphore=AcquireSemaphoreInfo();
1124   LockSemaphoreInfo(resource_semaphore);
1125   value=(char *) NULL;
1126   switch (type)
1127   {
1128     case AreaResource:
1129     {
1130       resource_info.area_limit=limit;
1131       value=GetPolicyValue("area");
1132       if (value != (char *) NULL)
1133         resource_info.area_limit=MagickMin(limit,StringToSizeType(value,100.0));
1134       break;
1135     }
1136     case MemoryResource:
1137     {
1138       resource_info.memory_limit=limit;
1139       value=GetPolicyValue("memory");
1140       if (value != (char *) NULL)
1141         resource_info.memory_limit=MagickMin(limit,StringToSizeType(value,
1142           100.0));
1143       break;
1144     }
1145     case MapResource:
1146     {
1147       resource_info.map_limit=limit;
1148       value=GetPolicyValue("map");
1149       if (value != (char *) NULL)
1150         resource_info.map_limit=MagickMin(limit,StringToSizeType(value,100.0));
1151       break;
1152     }
1153     case DiskResource:
1154     {
1155       resource_info.disk_limit=limit;
1156       value=GetPolicyValue("disk");
1157       if (value != (char *) NULL)
1158         resource_info.disk_limit=MagickMin(limit,StringToSizeType(value,100.0));
1159       break;
1160     }
1161     case FileResource:
1162     {
1163       resource_info.file_limit=limit;
1164       value=GetPolicyValue("file");
1165       if (value != (char *) NULL)
1166         resource_info.file_limit=MagickMin(limit,StringToSizeType(value,100.0));
1167       break;
1168     }
1169     case ThreadResource:
1170     {
1171       resource_info.thread_limit=limit;
1172       value=GetPolicyValue("thread");
1173       if (value != (char *) NULL)
1174         resource_info.thread_limit=MagickMin(limit,StringToSizeType(value,
1175           100.0));
1176       if (resource_info.thread_limit > GetOpenMPMaximumThreads())
1177         resource_info.thread_limit=GetOpenMPMaximumThreads();
1178       break;
1179     }
1180     case ThrottleResource:
1181     {
1182       resource_info.throttle_limit=limit;
1183       value=GetPolicyValue("throttle");
1184       if (value != (char *) NULL)
1185         resource_info.throttle_limit=MagickMin(limit,StringToSizeType(value,
1186           100.0));
1187       if (resource_info.throttle_limit > GetOpenMPMaximumThreads())
1188         resource_info.throttle_limit=GetOpenMPMaximumThreads();
1189       break;
1190     }
1191     case TimeResource:
1192     {
1193       resource_info.time_limit=limit;
1194       value=GetPolicyValue("time");
1195       if (value != (char *) NULL)
1196         resource_info.time_limit=MagickMin(limit,StringToSizeType(value,100.0));
1197       break;
1198     }
1199     default:
1200       break;
1201   }
1202   if (value != (char *) NULL)
1203     value=DestroyString(value);
1204   UnlockSemaphoreInfo(resource_semaphore);
1205   return(MagickTrue);
1206 }