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 %                                John Cristy                                  %
  17 %                               September 2002                                %
  18 %                                                                             %
  19 %                                                                             %
  20 %  Copyright 1999-2012 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/option.h"
  52 #include "MagickCore/policy.h"
  53 #include "MagickCore/random_.h"
  54 #include "MagickCore/registry.h"
  55 #include "MagickCore/resource_.h"
  56 #include "MagickCore/resource-private.h"
  57 #include "MagickCore/semaphore.h"
  58 #include "MagickCore/signature-private.h"
  59 #include "MagickCore/string_.h"
  60 #include "MagickCore/string-private.h"
  61 #include "MagickCore/splay-tree.h"
  62 #include "MagickCore/thread-private.h"
  63 #include "MagickCore/token.h"
  64 #include "MagickCore/utility.h"
  65 #include "MagickCore/utility-private.h"
  66 \f
  67 /*
  68   Typedef declarations.
  69 */
  70 typedef struct _ResourceInfo
  71 {
  72   MagickOffsetType
  73     area,
  74     memory,
  75     map,
  76     disk,
  77     file,
  78     thread,
  79     time;
  80
  81   MagickSizeType
  82     area_limit,
  83     memory_limit,
  84     map_limit,
  85     disk_limit,
  86     file_limit,
  87     thread_limit,
  88     time_limit;
  89 } ResourceInfo;
  90 \f
  91 /*
  92   Global declarations.
  93 */
  94 static RandomInfo
  95   *random_info = (RandomInfo *) NULL;
  96
  97 static ResourceInfo
  98   resource_info =
  99   {
 100     MagickULLConstant(0),
 101     MagickULLConstant(0),
 102     MagickULLConstant(0),
 103     MagickULLConstant(0),
 104     MagickULLConstant(0),
 105     MagickULLConstant(0),
 106     MagickULLConstant(0),
 107     MagickULLConstant(3072)*1024*1024,
 108     MagickULLConstant(1536)*1024*1024,
 109     MagickULLConstant(3072)*1024*1024,
 110     MagickResourceInfinity,
 111     MagickULLConstant(768),
 112     MagickULLConstant(1),
 113     MagickResourceInfinity
 114   };
 115
 116 static SemaphoreInfo
 117   *resource_semaphore = (SemaphoreInfo *) NULL;
 118
 119 static SplayTreeInfo
 120   *temporary_resources = (SplayTreeInfo *) NULL;
 121 \f
 122 /*
 123 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 124 %                                                                             %
 125 %                                                                             %
 126 %                                                                             %
 127 %   A c q u i r e M a g i c k R e s o u r c e                                 %
 128 %                                                                             %
 129 %                                                                             %
 130 %                                                                             %
 131 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 132 %
 133 %  AcquireMagickResource() acquires resources of the specified type.
 134 %  MagickFalse is returned if the specified resource is exhausted otherwise
 135 %  MagickTrue.
 136 %
 137 %  The format of the AcquireMagickResource() method is:
 138 %
 139 %      MagickBooleanType AcquireMagickResource(const ResourceType type,
 140 %        const MagickSizeType size)
 141 %
 142 %  A description of each parameter follows:
 143 %
 144 %    o type: the type of resource.
 145 %
 146 %    o size: the number of bytes needed from for this resource.
 147 %
 148 */
 149 MagickExport MagickBooleanType AcquireMagickResource(const ResourceType type,
 150   const MagickSizeType size)
 151 {
 152   char
 153     resource_current[MaxTextExtent],
 154     resource_limit[MaxTextExtent],
 155     resource_request[MaxTextExtent];
 156
 157   MagickBooleanType
 158     status;
 159
 160   MagickSizeType
 161     limit;
 162
 163   status=MagickFalse;
 164   (void) FormatMagickSize(size,MagickFalse,resource_request);
 165   if (resource_semaphore == (SemaphoreInfo *) NULL)
 166     AcquireSemaphoreInfo(&resource_semaphore);
 167   LockSemaphoreInfo(resource_semaphore);
 168   switch (type)
 169   {
 170     case AreaResource:
 171     {
 172       resource_info.area=(MagickOffsetType) size;
 173       limit=resource_info.area_limit;
 174       status=(resource_info.area_limit == MagickResourceInfinity) ||
 175         (size < limit) ? MagickTrue : MagickFalse;
 176       (void) FormatMagickSize((MagickSizeType) resource_info.area,MagickFalse,
 177         resource_current);
 178       (void) FormatMagickSize(resource_info.area_limit,MagickFalse,
 179         resource_limit);
 180       break;
 181     }
 182     case MemoryResource:
 183     {
 184       resource_info.memory+=size;
 185       limit=resource_info.memory_limit;
 186       status=(resource_info.memory_limit == MagickResourceInfinity) ||
 187         ((MagickSizeType) resource_info.memory < limit) ?
 188         MagickTrue : MagickFalse;
 189       (void) FormatMagickSize((MagickSizeType) resource_info.memory,MagickTrue,
 190         resource_current);
 191       (void) FormatMagickSize(resource_info.memory_limit,MagickTrue,
 192         resource_limit);
 193       break;
 194     }
 195     case MapResource:
 196     {
 197       resource_info.map+=size;
 198       limit=resource_info.map_limit;
 199       status=(resource_info.map_limit == MagickResourceInfinity) ||
 200         ((MagickSizeType) resource_info.map < limit) ?
 201         MagickTrue : MagickFalse;
 202       (void) FormatMagickSize((MagickSizeType) resource_info.map,MagickTrue,
 203         resource_current);
 204       (void) FormatMagickSize(resource_info.map_limit,MagickTrue,
 205         resource_limit);
 206       break;
 207     }
 208     case DiskResource:
 209     {
 210       resource_info.disk+=size;
 211       limit=resource_info.disk_limit;
 212       status=(resource_info.disk_limit == MagickResourceInfinity) ||
 213         ((MagickSizeType) resource_info.disk < limit) ?
 214         MagickTrue : MagickFalse;
 215       (void) FormatMagickSize((MagickSizeType) resource_info.disk,MagickTrue,
 216         resource_current);
 217       (void) FormatMagickSize(resource_info.disk_limit,MagickTrue,
 218         resource_limit);
 219       break;
 220     }
 221     case FileResource:
 222     {
 223       resource_info.file+=size;
 224       limit=resource_info.file_limit;
 225       status=(resource_info.file_limit == MagickResourceInfinity) ||
 226         ((MagickSizeType) resource_info.file < limit) ?
 227         MagickTrue : MagickFalse;
 228       (void) FormatMagickSize((MagickSizeType) resource_info.file,MagickFalse,
 229         resource_current);
 230       (void) FormatMagickSize((MagickSizeType) resource_info.file_limit,
 231         MagickFalse,resource_limit);
 232       break;
 233     }
 234     case ThreadResource:
 235     {
 236       limit=resource_info.thread_limit;
 237       status=(resource_info.thread_limit == MagickResourceInfinity) ||
 238         ((MagickSizeType) resource_info.thread < limit) ?
 239         MagickTrue : MagickFalse;
 240       (void) FormatMagickSize((MagickSizeType) resource_info.thread,MagickFalse,
 241         resource_current);
 242       (void) FormatMagickSize((MagickSizeType) resource_info.thread_limit,
 243         MagickFalse,resource_limit);
 244       break;
 245     }
 246     case TimeResource:
 247     {
 248       resource_info.time+=size;
 249       limit=resource_info.time_limit;
 250       status=(resource_info.time_limit == MagickResourceInfinity) ||
 251         ((MagickSizeType) resource_info.time < limit) ?
 252         MagickTrue : MagickFalse;
 253       (void) FormatMagickSize((MagickSizeType) resource_info.time,MagickFalse,
 254         resource_current);
 255       (void) FormatMagickSize((MagickSizeType) resource_info.time_limit,
 256         MagickFalse,resource_limit);
 257       break;
 258     }
 259     default:
 260       break;
 261   }
 262   UnlockSemaphoreInfo(resource_semaphore);
 263   (void) LogMagickEvent(ResourceEvent,GetMagickModule(),"%s: %s/%s/%s",
 264     CommandOptionToMnemonic(MagickResourceOptions,(ssize_t) type),
 265     resource_request,resource_current,resource_limit);
 266   return(status);
 267 }
 268 \f
 269 /*
 270 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 271 %                                                                             %
 272 %                                                                             %
 273 %                                                                             %
 274 +   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 %
 275 %                                                                             %
 276 %                                                                             %
 277 %                                                                             %
 278 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 279 %
 280 %  AsynchronousResourceComponentTerminus() destroys the resource environment.
 281 %  It differs from ResourceComponentTerminus() in that it can be called from a
 282 %  asynchronous signal handler.
 283 %
 284 %  The format of the ResourceComponentTerminus() method is:
 285 %
 286 %      ResourceComponentTerminus(void)
 287 %
 288 */
 289 MagickPrivate void AsynchronousResourceComponentTerminus(void)
 290 {
 291   const char
 292     *path;
 293
 294   if (temporary_resources == (SplayTreeInfo *) NULL)
 295     return;
 296   /*
 297     Remove any lingering temporary files.
 298   */
 299   ResetSplayTreeIterator(temporary_resources);
 300   path=(const char *) GetNextKeyInSplayTree(temporary_resources);
 301   while (path != (const char *) NULL)
 302   {
 303     (void) remove_utf8(path);
 304     path=(const char *) GetNextKeyInSplayTree(temporary_resources);
 305   }
 306 }
 307 \f
 308 /*
 309 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 310 %                                                                             %
 311 %                                                                             %
 312 %                                                                             %
 313 %   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                         %
 314 %                                                                             %
 315 %                                                                             %
 316 %                                                                             %
 317 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 318 %
 319 %  AcquireUniqueFileResource() returns a unique file name, and returns a file
 320 %  descriptor for the file open for reading and writing.
 321 %
 322 %  The format of the AcquireUniqueFileResource() method is:
 323 %
 324 %      int AcquireUniqueFileResource(char *path)
 325 %
 326 %  A description of each parameter follows:
 327 %
 328 %   o  path:  Specifies a pointer to an array of characters.  The unique path
 329 %      name is returned in this array.
 330 %
 331 */
 332
 333 static void *DestroyTemporaryResources(void *temporary_resource)
 334 {
 335   (void) remove_utf8((char *) temporary_resource);
 336   temporary_resource=DestroyString((char *) temporary_resource);
 337   return((void *) NULL);
 338 }
 339
 340 static MagickBooleanType GetPathTemplate(char *path)
 341 {
 342   char
 343     *directory;
 344
 345   ExceptionInfo
 346     *exception;
 347
 348   MagickBooleanType
 349     status;
 350
 351   register char
 352     *p;
 353
 354   struct stat
 355     attributes;
 356
 357   (void) FormatLocaleString(path,MaxTextExtent,"magick-%.20g-XXXXXXXXXXXX",
 358     (double) getpid());
 359   exception=AcquireExceptionInfo();
 360   directory=(char *) GetImageRegistry(StringRegistryType,"temporary-path",
 361     exception);
 362   exception=DestroyExceptionInfo(exception);
 363   if (directory == (char *) NULL)
 364     directory=GetEnvironmentValue("MAGICK_TEMPORARY_PATH");
 365   if (directory == (char *) NULL)
 366     directory=GetEnvironmentValue("MAGICK_TMPDIR");
 367   if (directory == (char *) NULL)
 368     directory=GetPolicyValue("temporary-path");
 369   if (directory == (char *) NULL)
 370     directory=GetEnvironmentValue("TMPDIR");
 371 #if defined(MAGICKCORE_WINDOWS_SUPPORT) || defined(__OS2__)
 372   if (directory == (char *) NULL)
 373     directory=GetEnvironmentValue("TMP");
 374   if (directory == (char *) NULL)
 375     directory=GetEnvironmentValue("TEMP");
 376 #endif
 377 #if defined(__VMS)
 378   if (directory == (char *) NULL)
 379     directory=GetEnvironmentValue("MTMPDIR");
 380 #endif
 381 #if defined(P_tmpdir)
 382   if (directory == (char *) NULL)
 383     directory=ConstantString(P_tmpdir);
 384 #endif
 385   if (directory == (char *) NULL)
 386     return(MagickTrue);
 387   if (strlen(directory) > (MaxTextExtent-25))
 388     {
 389       directory=DestroyString(directory);
 390       return(MagickTrue);
 391     }
 392   status=GetPathAttributes(directory,&attributes);
 393   if ((status == MagickFalse) || !S_ISDIR(attributes.st_mode))
 394     {
 395       directory=DestroyString(directory);
 396       return(MagickTrue);
 397     }
 398   if (directory[strlen(directory)-1] == *DirectorySeparator)
 399     (void) FormatLocaleString(path,MaxTextExtent,"%smagick-%.20g-XXXXXXXXXXXX",
 400       directory,(double) getpid());
 401   else
 402     (void) FormatLocaleString(path,MaxTextExtent,
 403       "%s%smagick-%.20g-XXXXXXXXXXXX",directory,DirectorySeparator,(double)
 404       getpid());
 405   directory=DestroyString(directory);
 406   if (*DirectorySeparator != '/')
 407     for (p=path; *p != '\0'; p++)
 408       if (*p == *DirectorySeparator)
 409         *p='/';
 410   return(MagickTrue);
 411 }
 412
 413 MagickExport int AcquireUniqueFileResource(char *path)
 414 {
 415 #if !defined(O_NOFOLLOW)
 416 #define O_NOFOLLOW 0
 417 #endif
 418 #if !defined(TMP_MAX)
 419 # define TMP_MAX  238328
 420 #endif
 421
 422   int
 423     c,
 424     file;
 425
 426   register char
 427     *p;
 428
 429   register ssize_t
 430     i;
 431
 432   static const char
 433     portable_filename[65] =
 434       "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789_-";
 435
 436   StringInfo
 437     *key;
 438
 439   unsigned char
 440     *datum;
 441
 442   assert(path != (char *) NULL);
 443   (void) LogMagickEvent(ResourceEvent,GetMagickModule(),"%s",path);
 444   if (random_info == (RandomInfo *) NULL)
 445     random_info=AcquireRandomInfo();
 446   file=(-1);
 447   for (i=0; i < (ssize_t) TMP_MAX; i++)
 448   {
 449     /*
 450       Get temporary pathname.
 451     */
 452     (void) GetPathTemplate(path);
 453     key=GetRandomKey(random_info,2);
 454     p=path+strlen(path)-12;
 455     datum=GetStringInfoDatum(key);
 456     for (i=0; i < (ssize_t) GetStringInfoLength(key); i++)
 457     {
 458       c=(int) (datum[i] & 0x3f);
 459       *p++=portable_filename[c];
 460     }
 461     key=DestroyStringInfo(key);
 462 #if defined(MAGICKCORE_HAVE_MKSTEMP)
 463     file=mkstemp(path);
 464 #if defined(__OS2__)
 465     setmode(file,O_BINARY);
 466 #endif
 467     if (file != -1)
 468       break;
 469 #endif
 470     key=GetRandomKey(random_info,12);
 471     p=path+strlen(path)-12;
 472     datum=GetStringInfoDatum(key);
 473     for (i=0; i < (ssize_t) GetStringInfoLength(key); i++)
 474     {
 475       c=(int) (datum[i] & 0x3f);
 476       *p++=portable_filename[c];
 477     }
 478     key=DestroyStringInfo(key);
 479     file=open_utf8(path,O_RDWR | O_CREAT | O_EXCL | O_BINARY | O_NOFOLLOW,
 480       S_MODE);
 481     if ((file >= 0) || (errno != EEXIST))
 482       break;
 483   }
 484   (void) LogMagickEvent(ResourceEvent,GetMagickModule(),"%s",path);
 485   if (file == -1)
 486     return(file);
 487   if (resource_semaphore == (SemaphoreInfo *) NULL)
 488     AcquireSemaphoreInfo(&resource_semaphore);
 489   LockSemaphoreInfo(resource_semaphore);
 490   if (temporary_resources == (SplayTreeInfo *) NULL)
 491     temporary_resources=NewSplayTree(CompareSplayTreeString,
 492       DestroyTemporaryResources,(void *(*)(void *)) NULL);
 493   UnlockSemaphoreInfo(resource_semaphore);
 494   (void) AddValueToSplayTree(temporary_resources,ConstantString(path),
 495     (const void *) NULL);
 496   return(file);
 497 }
 498 \f
 499 /*
 500 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 501 %                                                                             %
 502 %                                                                             %
 503 %                                                                             %
 504 %   G e t M a g i c k R e s o u r c e                                         %
 505 %                                                                             %
 506 %                                                                             %
 507 %                                                                             %
 508 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 509 %
 510 %  GetMagickResource() returns the specified resource.
 511 %
 512 %  The format of the GetMagickResource() method is:
 513 %
 514 %      MagickSizeType GetMagickResource(const ResourceType type)
 515 %
 516 %  A description of each parameter follows:
 517 %
 518 %    o type: the type of resource.
 519 %
 520 */
 521 MagickExport MagickSizeType GetMagickResource(const ResourceType type)
 522 {
 523   MagickSizeType
 524     resource;
 525
 526   resource=0;
 527   LockSemaphoreInfo(resource_semaphore);
 528   switch (type)
 529   {
 530     case AreaResource:
 531     {
 532       resource=(MagickSizeType) resource_info.area;
 533       break;
 534     }
 535     case MemoryResource:
 536     {
 537       resource=(MagickSizeType) resource_info.memory;
 538       break;
 539     }
 540     case MapResource:
 541     {
 542       resource=(MagickSizeType) resource_info.map;
 543       break;
 544     }
 545     case DiskResource:
 546     {
 547       resource=(MagickSizeType) resource_info.disk;
 548       break;
 549     }
 550     case FileResource:
 551     {
 552       resource=(MagickSizeType) resource_info.file;
 553       break;
 554     }
 555     case ThreadResource:
 556     {
 557       resource=(MagickSizeType) resource_info.thread;
 558       break;
 559     }
 560     case TimeResource:
 561     {
 562       resource=(MagickSizeType) resource_info.time;
 563       break;
 564     }
 565     default:
 566       break;
 567   }
 568   UnlockSemaphoreInfo(resource_semaphore);
 569   return(resource);
 570 }
 571 \f
 572 /*
 573 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 574 %                                                                             %
 575 %                                                                             %
 576 %                                                                             %
 577 %   G e t M a g i c k R e s o u r c e L i m i t                               %
 578 %                                                                             %
 579 %                                                                             %
 580 %                                                                             %
 581 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 582 %
 583 %  GetMagickResourceLimit() returns the specified resource limit.
 584 %
 585 %  The format of the GetMagickResourceLimit() method is:
 586 %
 587 %      MagickSizeType GetMagickResourceLimit(const ResourceType type)
 588 %
 589 %  A description of each parameter follows:
 590 %
 591 %    o type: the type of resource.
 592 %
 593 */
 594 MagickExport MagickSizeType GetMagickResourceLimit(const ResourceType type)
 595 {
 596   MagickSizeType
 597     resource;
 598
 599   resource=0;
 600   if (resource_semaphore == (SemaphoreInfo *) NULL)
 601     AcquireSemaphoreInfo(&resource_semaphore);
 602   LockSemaphoreInfo(resource_semaphore);
 603   switch (type)
 604   {
 605     case AreaResource:
 606     {
 607       resource=resource_info.area_limit;
 608       break;
 609     }
 610     case MemoryResource:
 611     {
 612       resource=resource_info.memory_limit;
 613       break;
 614     }
 615     case MapResource:
 616     {
 617       resource=resource_info.map_limit;
 618       break;
 619     }
 620     case DiskResource:
 621     {
 622       resource=resource_info.disk_limit;
 623       break;
 624     }
 625     case FileResource:
 626     {
 627       resource=resource_info.file_limit;
 628       break;
 629     }
 630     case ThreadResource:
 631     {
 632       resource=resource_info.thread_limit;
 633       break;
 634     }
 635     case TimeResource:
 636     {
 637       resource=resource_info.time_limit;
 638       break;
 639     }
 640     default:
 641       break;
 642   }
 643   UnlockSemaphoreInfo(resource_semaphore);
 644   return(resource);
 645 }
 646 \f
 647 /*
 648 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 649 %                                                                             %
 650 %                                                                             %
 651 %                                                                             %
 652 %  L i s t M a g i c k R e s o u r c e I n f o                                %
 653 %                                                                             %
 654 %                                                                             %
 655 %                                                                             %
 656 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 657 %
 658 %  ListMagickResourceInfo() lists the resource info to a file.
 659 %
 660 %  The format of the ListMagickResourceInfo method is:
 661 %
 662 %      MagickBooleanType ListMagickResourceInfo(FILE *file,
 663 %        ExceptionInfo *exception)
 664 %
 665 %  A description of each parameter follows.
 666 %
 667 %    o file:  An pointer to a FILE.
 668 %
 669 %    o exception: return any errors or warnings in this structure.
 670 %
 671 */
 672 MagickExport MagickBooleanType ListMagickResourceInfo(FILE *file,
 673   ExceptionInfo *magick_unused(exception))
 674 {
 675   char
 676     area_limit[MaxTextExtent],
 677     disk_limit[MaxTextExtent],
 678     map_limit[MaxTextExtent],
 679     memory_limit[MaxTextExtent],
 680     time_limit[MaxTextExtent];
 681
 682   if (file == (const FILE *) NULL)
 683     file=stdout;
 684   if (resource_semaphore == (SemaphoreInfo *) NULL)
 685     AcquireSemaphoreInfo(&resource_semaphore);
 686   LockSemaphoreInfo(resource_semaphore);
 687   (void) FormatMagickSize(resource_info.area_limit,MagickFalse,area_limit);
 688   (void) FormatMagickSize(resource_info.memory_limit,MagickTrue,memory_limit);
 689   (void) FormatMagickSize(resource_info.map_limit,MagickTrue,map_limit);
 690   (void) CopyMagickString(disk_limit,"unlimited",MaxTextExtent);
 691   if (resource_info.disk_limit != MagickResourceInfinity)
 692     (void) FormatMagickSize(resource_info.disk_limit,MagickTrue,disk_limit);
 693   (void) CopyMagickString(time_limit,"unlimited",MaxTextExtent);
 694   if (resource_info.time_limit != MagickResourceInfinity)
 695     (void) FormatLocaleString(time_limit,MaxTextExtent,"%.20g",(double)
 696       ((MagickOffsetType) resource_info.time_limit));
 697   (void) FormatLocaleFile(file,"File         Area       Memory          Map"
 698     "         Disk    Thread         Time\n");
 699   (void) FormatLocaleFile(file,
 700     "--------------------------------------------------------"
 701     "-----------------------\n");
 702   (void) FormatLocaleFile(file,"%4g   %10s   %10s   %10s   %10s    %6g  %11s\n",
 703     (double) ((MagickOffsetType) resource_info.file_limit),area_limit,
 704     memory_limit,map_limit,disk_limit,(double) ((MagickOffsetType)
 705     resource_info.thread_limit),time_limit);
 706   (void) fflush(file);
 707   UnlockSemaphoreInfo(resource_semaphore);
 708   return(MagickTrue);
 709 }
 710 \f
 711 /*
 712 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 713 %                                                                             %
 714 %                                                                             %
 715 %                                                                             %
 716 %   R e l i n q u i s h M a g i c k R e s o u r c e                           %
 717 %                                                                             %
 718 %                                                                             %
 719 %                                                                             %
 720 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 721 %
 722 %  RelinquishMagickResource() relinquishes resources of the specified type.
 723 %
 724 %  The format of the RelinquishMagickResource() method is:
 725 %
 726 %      void RelinquishMagickResource(const ResourceType type,
 727 %        const MagickSizeType size)
 728 %
 729 %  A description of each parameter follows:
 730 %
 731 %    o type: the type of resource.
 732 %
 733 %    o size: the size of the resource.
 734 %
 735 */
 736 MagickExport void RelinquishMagickResource(const ResourceType type,
 737   const MagickSizeType size)
 738 {
 739   char
 740     resource_current[MaxTextExtent],
 741     resource_limit[MaxTextExtent],
 742     resource_request[MaxTextExtent];
 743
 744   (void) FormatMagickSize(size,MagickFalse,resource_request);
 745   if (resource_semaphore == (SemaphoreInfo *) NULL)
 746     AcquireSemaphoreInfo(&resource_semaphore);
 747   LockSemaphoreInfo(resource_semaphore);
 748   switch (type)
 749   {
 750     case AreaResource:
 751     {
 752       resource_info.area=(MagickOffsetType) size;
 753       (void) FormatMagickSize((MagickSizeType) resource_info.area,MagickFalse,
 754         resource_current);
 755       (void) FormatMagickSize(resource_info.area_limit,MagickFalse,
 756         resource_limit);
 757       break;
 758     }
 759     case MemoryResource:
 760     {
 761       resource_info.memory-=size;
 762       (void) FormatMagickSize((MagickSizeType) resource_info.memory,
 763         MagickTrue,resource_current);
 764       (void) FormatMagickSize(resource_info.memory_limit,MagickTrue,
 765         resource_limit);
 766       break;
 767     }
 768     case MapResource:
 769     {
 770       resource_info.map-=size;
 771       (void) FormatMagickSize((MagickSizeType) resource_info.map,MagickTrue,
 772         resource_current);
 773       (void) FormatMagickSize(resource_info.map_limit,MagickTrue,
 774         resource_limit);
 775       break;
 776     }
 777     case DiskResource:
 778     {
 779       resource_info.disk-=size;
 780       (void) FormatMagickSize((MagickSizeType) resource_info.disk,MagickTrue,
 781         resource_current);
 782       (void) FormatMagickSize(resource_info.disk_limit,MagickTrue,
 783         resource_limit);
 784       break;
 785     }
 786     case FileResource:
 787     {
 788       resource_info.file-=size;
 789       (void) FormatMagickSize((MagickSizeType) resource_info.file,MagickFalse,
 790         resource_current);
 791       (void) FormatMagickSize((MagickSizeType) resource_info.file_limit,
 792         MagickFalse,resource_limit);
 793       break;
 794     }
 795     case ThreadResource:
 796     {
 797       (void) FormatMagickSize((MagickSizeType) resource_info.thread,MagickFalse,
 798         resource_current);
 799       (void) FormatMagickSize((MagickSizeType) resource_info.thread_limit,
 800         MagickFalse,resource_limit);
 801       break;
 802     }
 803     case TimeResource:
 804     {
 805       resource_info.time-=size;
 806       (void) FormatMagickSize((MagickSizeType) resource_info.time,MagickFalse,
 807         resource_current);
 808       (void) FormatMagickSize((MagickSizeType) resource_info.time_limit,
 809         MagickFalse,resource_limit);
 810       break;
 811     }
 812     default:
 813       break;
 814   }
 815   UnlockSemaphoreInfo(resource_semaphore);
 816   (void) LogMagickEvent(ResourceEvent,GetMagickModule(),"%s: %s/%s/%s",
 817     CommandOptionToMnemonic(MagickResourceOptions,(ssize_t) type),
 818       resource_request,resource_current,resource_limit);
 819 }
 820 \f
 821 /*
 822 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 823 %                                                                             %
 824 %                                                                             %
 825 %                                                                             %
 826 %    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                  %
 827 %                                                                             %
 828 %                                                                             %
 829 %                                                                             %
 830 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 831 %
 832 %  RelinquishUniqueFileResource() relinquishes a unique file resource.
 833 %
 834 %  The format of the RelinquishUniqueFileResource() method is:
 835 %
 836 %      MagickBooleanType RelinquishUniqueFileResource(const char *path)
 837 %
 838 %  A description of each parameter follows:
 839 %
 840 %    o name: the name of the temporary resource.
 841 %
 842 */
 843 MagickExport MagickBooleanType RelinquishUniqueFileResource(const char *path)
 844 {
 845   char
 846     cache_path[MaxTextExtent];
 847
 848   assert(path != (const char *) NULL);
 849   (void) LogMagickEvent(ResourceEvent,GetMagickModule(),"%s",path);
 850   if (temporary_resources != (SplayTreeInfo *) NULL)
 851     {
 852       register char
 853         *p;
 854
 855       ResetSplayTreeIterator(temporary_resources);
 856       p=(char *) GetNextKeyInSplayTree(temporary_resources);
 857       while (p != (char *) NULL)
 858       {
 859         if (LocaleCompare(p,path) == 0)
 860           break;
 861         p=(char *) GetNextKeyInSplayTree(temporary_resources);
 862       }
 863       if (p != (char *) NULL)
 864         (void) DeleteNodeFromSplayTree(temporary_resources,p);
 865     }
 866   (void) CopyMagickString(cache_path,path,MaxTextExtent);
 867   AppendImageFormat("cache",cache_path);
 868   (void) remove_utf8(cache_path);
 869   return(remove_utf8(path) == 0 ? MagickTrue : MagickFalse);
 870 }
 871 \f
 872 /*
 873 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 874 %                                                                             %
 875 %                                                                             %
 876 %                                                                             %
 877 +   R e s o u r c e C o m p o n e n t G e n e s i s                           %
 878 %                                                                             %
 879 %                                                                             %
 880 %                                                                             %
 881 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 882 %
 883 %  ResourceComponentGenesis() instantiates the resource component.
 884 %
 885 %  The format of the ResourceComponentGenesis method is:
 886 %
 887 %      MagickBooleanType ResourceComponentGenesis(void)
 888 %
 889 */
 890
 891 static inline size_t MagickMax(const size_t x,const size_t y)
 892 {
 893   if (x > y)
 894     return(x);
 895   return(y);
 896 }
 897
 898 static inline MagickSizeType StringToSizeType(const char *string,
 899   const double interval)
 900 {
 901   double
 902     value;
 903
 904   value=SiPrefixToDoubleInterval(string,interval);
 905   if (value >= (double) MagickULLConstant(~0))
 906     return(MagickULLConstant(~0));
 907   return((MagickSizeType) value);
 908 }
 909
 910 MagickPrivate MagickBooleanType ResourceComponentGenesis(void)
 911 {
 912   char
 913     *limit;
 914
 915   MagickSizeType
 916     memory;
 917
 918   ssize_t
 919     files,
 920     pages,
 921     pagesize;
 922
 923   /*
 924     Set Magick resource limits.
 925   */
 926   AcquireSemaphoreInfo(&resource_semaphore);
 927   pagesize=GetMagickPageSize();
 928   pages=(-1);
 929 #if defined(MAGICKCORE_HAVE_SYSCONF) && defined(_SC_PHYS_PAGES)
 930   pages=(ssize_t) sysconf(_SC_PHYS_PAGES);
 931 #endif
 932   memory=(MagickSizeType) pages*pagesize;
 933   if ((pagesize <= 0) || (pages <= 0))
 934     memory=2048UL*1024UL*1024UL;
 935 #if defined(PixelCacheThreshold)
 936   memory=PixelCacheThreshold;
 937 #endif
 938   (void) SetMagickResourceLimit(AreaResource,2*memory);
 939   (void) SetMagickResourceLimit(MemoryResource,memory);
 940   (void) SetMagickResourceLimit(MapResource,2*memory);
 941   limit=GetEnvironmentValue("MAGICK_AREA_LIMIT");
 942   if (limit == (char *) NULL)
 943     limit=GetPolicyValue("area");
 944   if (limit != (char *) NULL)
 945     {
 946       (void) SetMagickResourceLimit(AreaResource,StringToSizeType(limit,100.0));
 947       limit=DestroyString(limit);
 948     }
 949   limit=GetEnvironmentValue("MAGICK_MEMORY_LIMIT");
 950   if (limit == (char *) NULL)
 951     limit=GetPolicyValue("memory");
 952   if (limit != (char *) NULL)
 953     {
 954       (void) SetMagickResourceLimit(MemoryResource,
 955         StringToSizeType(limit,100.0));
 956       limit=DestroyString(limit);
 957     }
 958   limit=GetEnvironmentValue("MAGICK_MAP_LIMIT");
 959   if (limit == (char *) NULL)
 960     limit=GetPolicyValue("map");
 961   if (limit != (char *) NULL)
 962     {
 963       (void) SetMagickResourceLimit(MapResource,StringToSizeType(limit,100.0));
 964       limit=DestroyString(limit);
 965     }
 966   limit=GetEnvironmentValue("MAGICK_DISK_LIMIT");
 967   if (limit == (char *) NULL)
 968     limit=GetPolicyValue("disk");
 969   if (limit != (char *) NULL)
 970     {
 971       (void) SetMagickResourceLimit(DiskResource,StringToSizeType(limit,100.0));
 972       limit=DestroyString(limit);
 973     }
 974   files=(-1);
 975 #if defined(MAGICKCORE_HAVE_SYSCONF) && defined(_SC_OPEN_MAX)
 976   files=(ssize_t) sysconf(_SC_OPEN_MAX);
 977 #endif
 978 #if defined(MAGICKCORE_HAVE_GETRLIMIT) && defined(RLIMIT_NOFILE)
 979   if (files < 0)
 980     {
 981       struct rlimit
 982         resources;
 983
 984       if (getrlimit(RLIMIT_NOFILE,&resources) != -1)
 985         files=(ssize_t) resources.rlim_cur;
 986   }
 987 #endif
 988 #if defined(MAGICKCORE_HAVE_GETDTABLESIZE) && defined(MAGICKCORE_POSIX_SUPPORT)
 989   if (files < 0)
 990     files=(ssize_t) getdtablesize();
 991 #endif
 992   if (files < 0)
 993     files=64;
 994   (void) SetMagickResourceLimit(FileResource,MagickMax((size_t)
 995     (3*files/4),64));
 996   limit=GetEnvironmentValue("MAGICK_FILE_LIMIT");
 997   if (limit == (char *) NULL)
 998     limit=GetPolicyValue("file");
 999   if (limit != (char *) NULL)
1000     {
1001       (void) SetMagickResourceLimit(FileResource,StringToSizeType(limit,
1002         100.0));
1003       limit=DestroyString(limit);
1004     }
1005   (void) SetMagickResourceLimit(ThreadResource,GetOpenMPMaximumThreads());
1006   limit=GetEnvironmentValue("MAGICK_THREAD_LIMIT");
1007   if (limit == (char *) NULL)
1008     limit=GetPolicyValue("thread");
1009   if (limit != (char *) NULL)
1010     {
1011       (void) SetMagickResourceLimit(ThreadResource,StringToSizeType(limit,
1012         100.0));
1013       limit=DestroyString(limit);
1014     }
1015   limit=GetEnvironmentValue("MAGICK_TIME_LIMIT");
1016   if (limit == (char *) NULL)
1017     limit=GetPolicyValue("time");
1018   if (limit != (char *) NULL)
1019     {
1020       (void) SetMagickResourceLimit(TimeResource,StringToSizeType(limit,100.0));
1021       limit=DestroyString(limit);
1022     }
1023   return(MagickTrue);
1024 }
1025 \f
1026 /*
1027 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1028 %                                                                             %
1029 %                                                                             %
1030 %                                                                             %
1031 +   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                         %
1032 %                                                                             %
1033 %                                                                             %
1034 %                                                                             %
1035 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1036 %
1037 %  ResourceComponentTerminus() destroys the resource component.
1038 %
1039 %  The format of the ResourceComponentTerminus() method is:
1040 %
1041 %      ResourceComponentTerminus(void)
1042 %
1043 */
1044 MagickPrivate void ResourceComponentTerminus(void)
1045 {
1046   if (resource_semaphore == (SemaphoreInfo *) NULL)
1047     AcquireSemaphoreInfo(&resource_semaphore);
1048   LockSemaphoreInfo(resource_semaphore);
1049   if (temporary_resources != (SplayTreeInfo *) NULL)
1050     temporary_resources=DestroySplayTree(temporary_resources);
1051   if (random_info != (RandomInfo *) NULL)
1052     random_info=DestroyRandomInfo(random_info);
1053   UnlockSemaphoreInfo(resource_semaphore);
1054   DestroySemaphoreInfo(&resource_semaphore);
1055 }
1056 \f
1057 /*
1058 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1059 %                                                                             %
1060 %                                                                             %
1061 %                                                                             %
1062 %   S e t M a g i c k R e s o u r c e L i m i t                               %
1063 %                                                                             %
1064 %                                                                             %
1065 %                                                                             %
1066 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1067 %
1068 %  SetMagickResourceLimit() sets the limit for a particular resource.
1069 %
1070 %  The format of the SetMagickResourceLimit() method is:
1071 %
1072 %      MagickBooleanType SetMagickResourceLimit(const ResourceType type,
1073 %        const MagickSizeType limit)
1074 %
1075 %  A description of each parameter follows:
1076 %
1077 %    o type: the type of resource.
1078 %
1079 %    o limit: the maximum limit for the resource.
1080 %
1081 */
1082
1083 static inline MagickSizeType MagickMin(const MagickSizeType x,
1084   const MagickSizeType y)
1085 {
1086   if (x < y)
1087     return(x);
1088   return(y);
1089 }
1090
1091 MagickExport MagickBooleanType SetMagickResourceLimit(const ResourceType type,
1092   const MagickSizeType limit)
1093 {
1094   char
1095     *value;
1096
1097   if (resource_semaphore == (SemaphoreInfo *) NULL)
1098     AcquireSemaphoreInfo(&resource_semaphore);
1099   LockSemaphoreInfo(resource_semaphore);
1100   value=(char *) NULL;
1101   switch (type)
1102   {
1103     case AreaResource:
1104     {
1105       resource_info.area_limit=limit;
1106       value=GetPolicyValue("area");
1107       if (value != (char *) NULL)
1108         resource_info.area_limit=MagickMin(limit,StringToSizeType(value,100.0));
1109       break;
1110     }
1111     case MemoryResource:
1112     {
1113       resource_info.memory_limit=limit;
1114       value=GetPolicyValue("memory");
1115       if (value != (char *) NULL)
1116         resource_info.memory_limit=MagickMin(limit,StringToSizeType(value,
1117           100.0));
1118       break;
1119     }
1120     case MapResource:
1121     {
1122       resource_info.map_limit=limit;
1123       value=GetPolicyValue("map");
1124       if (value != (char *) NULL)
1125         resource_info.map_limit=MagickMin(limit,StringToSizeType(value,100.0));
1126       break;
1127     }
1128     case DiskResource:
1129     {
1130       resource_info.disk_limit=limit;
1131       value=GetPolicyValue("disk");
1132       if (value != (char *) NULL)
1133         resource_info.disk_limit=MagickMin(limit,StringToSizeType(value,100.0));
1134       break;
1135     }
1136     case FileResource:
1137     {
1138       resource_info.file_limit=limit;
1139       value=GetPolicyValue("file");
1140       if (value != (char *) NULL)
1141         resource_info.file_limit=MagickMin(limit,StringToSizeType(value,100.0));
1142       break;
1143     }
1144     case ThreadResource:
1145     {
1146       resource_info.thread_limit=limit;
1147       value=GetPolicyValue("thread");
1148       if (value != (char *) NULL)
1149         resource_info.thread_limit=MagickMin(limit,StringToSizeType(value,
1150           100.0));
1151       if (resource_info.thread_limit > GetOpenMPMaximumThreads())
1152         resource_info.thread_limit=GetOpenMPMaximumThreads();
1153       break;
1154     }
1155     case TimeResource:
1156     {
1157       resource_info.time_limit=limit;
1158       value=GetPolicyValue("time");
1159       if (value != (char *) NULL)
1160         resource_info.time_limit=MagickMin(limit,StringToSizeType(value,100.0));
1161       break;
1162     }
1163     default:
1164       break;
1165   }
1166   if (value != (char *) NULL)
1167     value=DestroyString(value);
1168   UnlockSemaphoreInfo(resource_semaphore);
1169   return(MagickTrue);
1170 }