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

   1 /*
   2 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
   3 %                                                                             %
   4 %                                                                             %
   5 %                                                                             %
   6 %           RRRR    EEEEE   SSSSS   OOO   U   U  RRRR    CCCC  EEEEE          %
   7 %           R   R   E       SS     O   O  U   U  R   R  C      E              %
   8 %           RRRR    EEE      SSS   O   O  U   U  RRRR   C      EEE            %
   9 %           R R     E          SS  O   O  U   U  R R    C      E              %
  10 %           R  R    EEEEE   SSSSS   OOO    UUU   R  R    CCCC  EEEEE          %
  11 %                                                                             %
  12 %                                                                             %
  13 %                        Get/Set MagickCore Resources                         %
  14 %                                                                             %
  15 %                              Software Design                                %
  16 %                                John Cristy                                  %
  17 %                               September 2002                                %
  18 %                                                                             %
  19 %                                                                             %
  20 %  Copyright 1999-2011 ImageMagick Studio LLC, a non-profit organization      %
  21 %  dedicated to making software imaging solutions freely available.           %
  22 %                                                                             %
  23 %  You may not use this file except in compliance with the License.  You may  %
  24 %  obtain a copy of the License at                                            %
  25 %                                                                             %
  26 %    http://www.imagemagick.org/script/license.php                            %
  27 %                                                                             %
  28 %  Unless required by applicable law or agreed to in writing, software        %
  29 %  distributed under the License is distributed on an "AS IS" BASIS,          %
  30 %  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.   %
  31 %  See the License for the specific language governing permissions and        %
  32 %  limitations under the License.                                             %
  33 %                                                                             %
  34 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  35 %
  36 %
  37 */
  38 \f
  39 /*
  40   Include declarations.
  41 */
  42 #include "magick/studio.h"
  43 #include "magick/cache.h"
  44 #include "magick/configure.h"
  45 #include "magick/exception.h"
  46 #include "magick/exception-private.h"
  47 #include "magick/hashmap.h"
  48 #include "magick/log.h"
  49 #include "magick/image.h"
  50 #include "magick/memory_.h"
  51 #include "magick/option.h"
  52 #include "magick/policy.h"
  53 #include "magick/random_.h"
  54 #include "magick/registry.h"
  55 #include "magick/resource_.h"
  56 #include "magick/semaphore.h"
  57 #include "magick/signature-private.h"
  58 #include "magick/string_.h"
  59 #include "magick/string-private.h"
  60 #include "magick/splay-tree.h"
  61 #include "magick/thread-private.h"
  62 #include "magick/token.h"
  63 #include "magick/utility.h"
  64 \f
  65 /*
  66   Typedef declarations.
  67 */
  68 typedef struct _ResourceInfo
  69 {
  70   MagickOffsetType
  71     area,
  72     memory,
  73     map,
  74     disk,
  75     file,
  76     thread,
  77     time;
  78
  79   MagickSizeType
  80     area_limit,
  81     memory_limit,
  82     map_limit,
  83     disk_limit,
  84     file_limit,
  85     thread_limit,
  86     time_limit;
  87 } ResourceInfo;
  88 \f
  89 /*
  90   Global declarations.
  91 */
  92 static RandomInfo
  93   *random_info = (RandomInfo *) NULL;
  94
  95 static ResourceInfo
  96   resource_info =
  97   {
  98     MagickULLConstant(0),
  99     MagickULLConstant(0),
 100     MagickULLConstant(0),
 101     MagickULLConstant(0),
 102     MagickULLConstant(0),
 103     MagickULLConstant(0),
 104     MagickULLConstant(0),
 105     MagickULLConstant(3072)*1024*1024/sizeof(PixelPacket),
 106     MagickULLConstant(1536)*1024*1024,
 107     MagickULLConstant(3072)*1024*1024,
 108     MagickResourceInfinity,
 109     MagickULLConstant(768),
 110     MagickULLConstant(4),
 111     MagickResourceInfinity
 112   };
 113
 114 static SemaphoreInfo
 115   *resource_semaphore = (SemaphoreInfo *) NULL;
 116
 117 static SplayTreeInfo
 118   *temporary_resources = (SplayTreeInfo *) NULL;
 119 \f
 120 /*
 121 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 122 %                                                                             %
 123 %                                                                             %
 124 %                                                                             %
 125 %   A c q u i r e M a g i c k R e s o u r c e                                 %
 126 %                                                                             %
 127 %                                                                             %
 128 %                                                                             %
 129 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 130 %
 131 %  AcquireMagickResource() acquires resources of the specified type.
 132 %  MagickFalse is returned if the specified resource is exhausted otherwise
 133 %  MagickTrue.
 134 %
 135 %  The format of the AcquireMagickResource() method is:
 136 %
 137 %      MagickBooleanType AcquireMagickResource(const ResourceType type,
 138 %        const MagickSizeType size)
 139 %
 140 %  A description of each parameter follows:
 141 %
 142 %    o type: the type of resource.
 143 %
 144 %    o size: the number of bytes needed from for this resource.
 145 %
 146 */
 147 MagickExport MagickBooleanType AcquireMagickResource(const ResourceType type,
 148   const MagickSizeType size)
 149 {
 150   char
 151     resource_current[MaxTextExtent],
 152     resource_limit[MaxTextExtent],
 153     resource_request[MaxTextExtent];
 154
 155   MagickBooleanType
 156     status;
 157
 158   MagickSizeType
 159     limit;
 160
 161   status=MagickFalse;
 162   (void) FormatMagickSize(size,MagickFalse,resource_request);
 163   if (resource_semaphore == (SemaphoreInfo *) NULL)
 164     AcquireSemaphoreInfo(&resource_semaphore);
 165   LockSemaphoreInfo(resource_semaphore);
 166   switch (type)
 167   {
 168     case AreaResource:
 169     {
 170       resource_info.area=(MagickOffsetType) size;
 171       limit=resource_info.area_limit;
 172       status=(resource_info.area_limit == MagickResourceInfinity) ||
 173         (size < limit) ? MagickTrue : MagickFalse;
 174       (void) FormatMagickSize((MagickSizeType) resource_info.area,MagickFalse,
 175         resource_current);
 176       (void) FormatMagickSize(resource_info.area_limit,MagickFalse,
 177         resource_limit);
 178       break;
 179     }
 180     case MemoryResource:
 181     {
 182       resource_info.memory+=size;
 183       limit=resource_info.memory_limit;
 184       status=(resource_info.memory_limit == MagickResourceInfinity) ||
 185         ((MagickSizeType) resource_info.memory < limit) ?
 186         MagickTrue : MagickFalse;
 187       (void) FormatMagickSize((MagickSizeType) resource_info.memory,MagickTrue,
 188         resource_current);
 189       (void) FormatMagickSize(resource_info.memory_limit,MagickTrue,
 190         resource_limit);
 191       break;
 192     }
 193     case MapResource:
 194     {
 195       resource_info.map+=size;
 196       limit=resource_info.map_limit;
 197       status=(resource_info.map_limit == MagickResourceInfinity) ||
 198         ((MagickSizeType) resource_info.map < limit) ?
 199         MagickTrue : MagickFalse;
 200       (void) FormatMagickSize((MagickSizeType) resource_info.map,MagickTrue,
 201         resource_current);
 202       (void) FormatMagickSize(resource_info.map_limit,MagickTrue,
 203         resource_limit);
 204       break;
 205     }
 206     case DiskResource:
 207     {
 208       resource_info.disk+=size;
 209       limit=resource_info.disk_limit;
 210       status=(resource_info.disk_limit == MagickResourceInfinity) ||
 211         ((MagickSizeType) resource_info.disk < limit) ?
 212         MagickTrue : MagickFalse;
 213       (void) FormatMagickSize((MagickSizeType) resource_info.disk,MagickTrue,
 214         resource_current);
 215       (void) FormatMagickSize(resource_info.disk_limit,MagickTrue,
 216         resource_limit);
 217       break;
 218     }
 219     case FileResource:
 220     {
 221       resource_info.file+=size;
 222       limit=resource_info.file_limit;
 223       status=(resource_info.file_limit == MagickResourceInfinity) ||
 224         ((MagickSizeType) resource_info.file < limit) ?
 225         MagickTrue : MagickFalse;
 226       (void) FormatMagickSize((MagickSizeType) resource_info.file,MagickFalse,
 227         resource_current);
 228       (void) FormatMagickSize((MagickSizeType) resource_info.file_limit,
 229         MagickFalse,resource_limit);
 230       break;
 231     }
 232     case ThreadResource:
 233     {
 234       resource_info.thread+=size;
 235       limit=resource_info.thread_limit;
 236       status=(resource_info.thread_limit == MagickResourceInfinity) ||
 237         ((MagickSizeType) resource_info.thread < limit) ?
 238         MagickTrue : MagickFalse;
 239       (void) FormatMagickSize((MagickSizeType) resource_info.thread,MagickFalse,
 240         resource_current);
 241       (void) FormatMagickSize((MagickSizeType) resource_info.thread_limit,
 242         MagickFalse,resource_limit);
 243       break;
 244     }
 245     case TimeResource:
 246     {
 247       resource_info.time+=size;
 248       limit=resource_info.time_limit;
 249       status=(resource_info.time_limit == MagickResourceInfinity) ||
 250         ((MagickSizeType) resource_info.time < limit) ?
 251         MagickTrue : MagickFalse;
 252       (void) FormatMagickSize((MagickSizeType) resource_info.time,MagickFalse,
 253         resource_current);
 254       (void) FormatMagickSize((MagickSizeType) resource_info.time_limit,
 255         MagickFalse,resource_limit);
 256       break;
 257     }
 258     default:
 259       break;
 260   }
 261   UnlockSemaphoreInfo(resource_semaphore);
 262   (void) LogMagickEvent(ResourceEvent,GetMagickModule(),"%s: %s/%s/%s",
 263     CommandOptionToMnemonic(MagickResourceOptions,(ssize_t) type),
 264     resource_request,resource_current,resource_limit);
 265   return(status);
 266 }
 267 \f
 268 /*
 269 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 270 %                                                                             %
 271 %                                                                             %
 272 %                                                                             %
 273 +   A s y n c h r o n o u s R e s o u r c e C o m p o n e n t T e r m i n u s %
 274 %                                                                             %
 275 %                                                                             %
 276 %                                                                             %
 277 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 278 %
 279 %  AsynchronousResourceComponentTerminus() destroys the resource environment.
 280 %  It differs from ResourceComponentTerminus() in that it can be called from a
 281 %  asynchronous signal handler.
 282 %
 283 %  The format of the ResourceComponentTerminus() method is:
 284 %
 285 %      ResourceComponentTerminus(void)
 286 %
 287 */
 288 MagickExport void AsynchronousResourceComponentTerminus(void)
 289 {
 290   const char
 291     *path;
 292
 293   if (temporary_resources == (SplayTreeInfo *) NULL)
 294     return;
 295   /*
 296     Remove any lingering temporary files.
 297   */
 298   ResetSplayTreeIterator(temporary_resources);
 299   path=(const char *) GetNextKeyInSplayTree(temporary_resources);
 300   while (path != (const char *) NULL)
 301   {
 302     (void) remove(path);
 303     path=(const char *) GetNextKeyInSplayTree(temporary_resources);
 304   }
 305 }
 306 \f
 307 /*
 308 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 309 %                                                                             %
 310 %                                                                             %
 311 %                                                                             %
 312 %   A c q u i r e U n i q u e F i l e R e s o u r c e                         %
 313 %                                                                             %
 314 %                                                                             %
 315 %                                                                             %
 316 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 317 %
 318 %  AcquireUniqueFileResource() returns a unique file name, and returns a file
 319 %  descriptor for the file open for reading and writing.
 320 %
 321 %  The format of the AcquireUniqueFileResource() method is:
 322 %
 323 %      int AcquireUniqueFileResource(char *path)
 324 %
 325 %  A description of each parameter follows:
 326 %
 327 %   o  path:  Specifies a pointer to an array of characters.  The unique path
 328 %      name is returned in this array.
 329 %
 330 */
 331
 332 static void *DestroyTemporaryResources(void *temporary_resource)
 333 {
 334   (void) remove((char *) temporary_resource);
 335   temporary_resource=DestroyString((char *) temporary_resource);
 336   return((void *) NULL);
 337 }
 338
 339 static MagickBooleanType GetPathTemplate(char *path)
 340 {
 341   char
 342     *directory;
 343
 344   ExceptionInfo
 345     *exception;
 346
 347   MagickBooleanType
 348     status;
 349
 350   register char
 351     *p;
 352
 353   struct stat
 354     attributes;
 355
 356   (void) CopyMagickString(path,"magick-XXXXXXXX",MaxTextExtent);
 357   exception=AcquireExceptionInfo();
 358   directory=(char *) GetImageRegistry(StringRegistryType,"temporary-path",
 359     exception);
 360   exception=DestroyExceptionInfo(exception);
 361   if (directory == (char *) NULL)
 362     directory=GetEnvironmentValue("MAGICK_TEMPORARY_PATH");
 363   if (directory == (char *) NULL)
 364     directory=GetEnvironmentValue("MAGICK_TMPDIR");
 365   if (directory == (char *) NULL)
 366     directory=GetPolicyValue("temporary-path");
 367   if (directory == (char *) NULL)
 368     directory=GetEnvironmentValue("TMPDIR");
 369 #if defined(MAGICKCORE_WINDOWS_SUPPORT) || defined(__OS2__)
 370   if (directory == (char *) NULL)
 371     directory=GetEnvironmentValue("TMP");
 372   if (directory == (char *) NULL)
 373     directory=GetEnvironmentValue("TEMP");
 374 #endif
 375 #if defined(__VMS)
 376   if (directory == (char *) NULL)
 377     directory=GetEnvironmentValue("MTMPDIR");
 378 #endif
 379 #if defined(P_tmpdir)
 380   if (directory == (char *) NULL)
 381     directory=ConstantString(P_tmpdir);
 382 #endif
 383   if (directory == (char *) NULL)
 384     return(MagickTrue);
 385   if (strlen(directory) > (MaxTextExtent-15))
 386     {
 387       directory=DestroyString(directory);
 388       return(MagickTrue);
 389     }
 390   status=GetPathAttributes(directory,&attributes);
 391   if ((status == MagickFalse) || !S_ISDIR(attributes.st_mode))
 392     {
 393       directory=DestroyString(directory);
 394       return(MagickTrue);
 395     }
 396   if (directory[strlen(directory)-1] == *DirectorySeparator)
 397     (void) FormatLocaleString(path,MaxTextExtent,"%smagick-XXXXXXXX",directory);
 398   else
 399     (void) FormatLocaleString(path,MaxTextExtent,"%s%smagick-XXXXXXXX",
 400       directory,DirectorySeparator);
 401   directory=DestroyString(directory);
 402   if (*DirectorySeparator != '/')
 403     for (p=path; *p != '\0'; p++)
 404       if (*p == *DirectorySeparator)
 405         *p='/';
 406   return(MagickTrue);
 407 }
 408
 409 MagickExport int AcquireUniqueFileResource(char *path)
 410 {
 411 #if !defined(O_NOFOLLOW)
 412 #define O_NOFOLLOW 0
 413 #endif
 414 #if !defined(TMP_MAX)
 415 # define TMP_MAX  238328
 416 #endif
 417
 418   int
 419     c,
 420     file;
 421
 422   register char
 423     *p;
 424
 425   register ssize_t
 426     i;
 427
 428   static const char
 429     portable_filename[65] =
 430       "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789_-";
 431
 432   StringInfo
 433     *key;
 434
 435   unsigned char
 436     *datum;
 437
 438   assert(path != (char *) NULL);
 439   (void) LogMagickEvent(ResourceEvent,GetMagickModule(),"%s",path);
 440   if (random_info == (RandomInfo *) NULL)
 441     random_info=AcquireRandomInfo();
 442   file=(-1);
 443   for (i=0; i < (ssize_t) TMP_MAX; i++)
 444   {
 445     /*
 446       Get temporary pathname.
 447     */
 448     (void) GetPathTemplate(path);
 449     key=GetRandomKey(random_info,2);
 450     p=path+strlen(path)-8;
 451     datum=GetStringInfoDatum(key);
 452     for (i=0; i < (ssize_t) GetStringInfoLength(key); i++)
 453     {
 454       c=(int) (datum[i] & 0x3f);
 455       *p++=portable_filename[c];
 456     }
 457     key=DestroyStringInfo(key);
 458 #if defined(MAGICKCORE_HAVE_MKSTEMP)
 459     file=mkstemp(path);
 460 #if defined(__OS2__)
 461     setmode(file,O_BINARY);
 462 #endif
 463     if (file != -1)
 464       break;
 465 #endif
 466     key=GetRandomKey(random_info,6);
 467     p=path+strlen(path)-6;
 468     datum=GetStringInfoDatum(key);
 469     for (i=0; i < (ssize_t) GetStringInfoLength(key); i++)
 470     {
 471       c=(int) (datum[i] & 0x3f);
 472       *p++=portable_filename[c];
 473     }
 474     key=DestroyStringInfo(key);
 475     file=open(path,O_RDWR | O_CREAT | O_EXCL | O_BINARY | O_NOFOLLOW,S_MODE);
 476     if ((file >= 0) || (errno != EEXIST))
 477       break;
 478   }
 479   (void) LogMagickEvent(ResourceEvent,GetMagickModule(),"%s",path);
 480   if (file == -1)
 481     return(file);
 482   if (resource_semaphore == (SemaphoreInfo *) NULL)
 483     AcquireSemaphoreInfo(&resource_semaphore);
 484   LockSemaphoreInfo(resource_semaphore);
 485   if (temporary_resources == (SplayTreeInfo *) NULL)
 486     temporary_resources=NewSplayTree(CompareSplayTreeString,
 487       DestroyTemporaryResources,(void *(*)(void *)) NULL);
 488   UnlockSemaphoreInfo(resource_semaphore);
 489   (void) AddValueToSplayTree(temporary_resources,ConstantString(path),
 490     (const void *) NULL);
 491   return(file);
 492 }
 493 \f
 494 /*
 495 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 496 %                                                                             %
 497 %                                                                             %
 498 %                                                                             %
 499 %   G e t M a g i c k R e s o u r c e                                         %
 500 %                                                                             %
 501 %                                                                             %
 502 %                                                                             %
 503 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 504 %
 505 %  GetMagickResource() returns the specified resource.
 506 %
 507 %  The format of the GetMagickResource() method is:
 508 %
 509 %      MagickSizeType GetMagickResource(const ResourceType type)
 510 %
 511 %  A description of each parameter follows:
 512 %
 513 %    o type: the type of resource.
 514 %
 515 */
 516 MagickExport MagickSizeType GetMagickResource(const ResourceType type)
 517 {
 518   MagickSizeType
 519     resource;
 520
 521   resource=0;
 522   LockSemaphoreInfo(resource_semaphore);
 523   switch (type)
 524   {
 525     case AreaResource:
 526     {
 527       resource=(MagickSizeType) resource_info.area;
 528       break;
 529     }
 530     case MemoryResource:
 531     {
 532       resource=(MagickSizeType) resource_info.memory;
 533       break;
 534     }
 535     case MapResource:
 536     {
 537       resource=(MagickSizeType) resource_info.map;
 538       break;
 539     }
 540     case DiskResource:
 541     {
 542       resource=(MagickSizeType) resource_info.disk;
 543       break;
 544     }
 545     case FileResource:
 546     {
 547       resource=(MagickSizeType) resource_info.file;
 548       break;
 549     }
 550     case ThreadResource:
 551     {
 552       resource=(MagickSizeType) resource_info.thread;
 553       break;
 554     }
 555     case TimeResource:
 556     {
 557       resource=(MagickSizeType) resource_info.time;
 558       break;
 559     }
 560     default:
 561       break;
 562   }
 563   UnlockSemaphoreInfo(resource_semaphore);
 564   return(resource);
 565 }
 566 \f
 567 /*
 568 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 569 %                                                                             %
 570 %                                                                             %
 571 %                                                                             %
 572 %   G e t M a g i c k R e s o u r c e L i m i t                               %
 573 %                                                                             %
 574 %                                                                             %
 575 %                                                                             %
 576 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 577 %
 578 %  GetMagickResourceLimit() returns the specified resource limit.
 579 %
 580 %  The format of the GetMagickResourceLimit() method is:
 581 %
 582 %      MagickSizeType GetMagickResourceLimit(const ResourceType type)
 583 %
 584 %  A description of each parameter follows:
 585 %
 586 %    o type: the type of resource.
 587 %
 588 */
 589 MagickExport MagickSizeType GetMagickResourceLimit(const ResourceType type)
 590 {
 591   MagickSizeType
 592     resource;
 593
 594   resource=0;
 595   if (resource_semaphore == (SemaphoreInfo *) NULL)
 596     AcquireSemaphoreInfo(&resource_semaphore);
 597   LockSemaphoreInfo(resource_semaphore);
 598   switch (type)
 599   {
 600     case AreaResource:
 601     {
 602       resource=resource_info.area_limit;
 603       break;
 604     }
 605     case MemoryResource:
 606     {
 607       resource=resource_info.memory_limit;
 608       break;
 609     }
 610     case MapResource:
 611     {
 612       resource=resource_info.map_limit;
 613       break;
 614     }
 615     case DiskResource:
 616     {
 617       resource=resource_info.disk_limit;
 618       break;
 619     }
 620     case FileResource:
 621     {
 622       resource=resource_info.file_limit;
 623       break;
 624     }
 625     case ThreadResource:
 626     {
 627       resource=resource_info.thread_limit;
 628       break;
 629     }
 630     case TimeResource:
 631     {
 632       resource=resource_info.time_limit;
 633       break;
 634     }
 635     default:
 636       break;
 637   }
 638   UnlockSemaphoreInfo(resource_semaphore);
 639   return(resource);
 640 }
 641 \f
 642 /*
 643 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 644 %                                                                             %
 645 %                                                                             %
 646 %                                                                             %
 647 %  L i s t M a g i c k R e s o u r c e I n f o                                %
 648 %                                                                             %
 649 %                                                                             %
 650 %                                                                             %
 651 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 652 %
 653 %  ListMagickResourceInfo() lists the resource info to a file.
 654 %
 655 %  The format of the ListMagickResourceInfo method is:
 656 %
 657 %      MagickBooleanType ListMagickResourceInfo(FILE *file,
 658 %        ExceptionInfo *exception)
 659 %
 660 %  A description of each parameter follows.
 661 %
 662 %    o file:  An pointer to a FILE.
 663 %
 664 %    o exception: return any errors or warnings in this structure.
 665 %
 666 */
 667 MagickExport MagickBooleanType ListMagickResourceInfo(FILE *file,
 668   ExceptionInfo *magick_unused(exception))
 669 {
 670   char
 671     area_limit[MaxTextExtent],
 672     disk_limit[MaxTextExtent],
 673     map_limit[MaxTextExtent],
 674     memory_limit[MaxTextExtent],
 675     time_limit[MaxTextExtent];
 676
 677   if (file == (const FILE *) NULL)
 678     file=stdout;
 679   if (resource_semaphore == (SemaphoreInfo *) NULL)
 680     AcquireSemaphoreInfo(&resource_semaphore);
 681   LockSemaphoreInfo(resource_semaphore);
 682   (void) FormatMagickSize(resource_info.area_limit,MagickFalse,area_limit);
 683   (void) FormatMagickSize(resource_info.memory_limit,MagickTrue,memory_limit);
 684   (void) FormatMagickSize(resource_info.map_limit,MagickTrue,map_limit);
 685   (void) CopyMagickString(disk_limit,"unlimited",MaxTextExtent);
 686   if (resource_info.disk_limit != MagickResourceInfinity)
 687     (void) FormatMagickSize(resource_info.disk_limit,MagickTrue,disk_limit);
 688   (void) CopyMagickString(time_limit,"unlimited",MaxTextExtent);
 689   if (resource_info.time_limit != MagickResourceInfinity)
 690     (void) FormatLocaleString(time_limit,MaxTextExtent,"%.20g",(double)
 691       resource_info.time_limit);
 692   (void) FormatLocaleFile(file,"File         Area       Memory          Map"
 693     "         Disk    Thread         Time\n");
 694   (void) FormatLocaleFile(file,
 695     "--------------------------------------------------------"
 696     "-----------------------\n");
 697   (void) FormatLocaleFile(file,"%4g   %10s   %10s   %10s   %10s    %6g  %11s\n",
 698     (double) resource_info.file_limit,area_limit,memory_limit,map_limit,
 699     disk_limit,(double) resource_info.thread_limit,time_limit);
 700   (void) fflush(file);
 701   UnlockSemaphoreInfo(resource_semaphore);
 702   return(MagickTrue);
 703 }
 704 \f
 705 /*
 706 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 707 %                                                                             %
 708 %                                                                             %
 709 %                                                                             %
 710 %   R e l i n q u i s h M a g i c k R e s o u r c e                           %
 711 %                                                                             %
 712 %                                                                             %
 713 %                                                                             %
 714 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 715 %
 716 %  RelinquishMagickResource() relinquishes resources of the specified type.
 717 %
 718 %  The format of the RelinquishMagickResource() method is:
 719 %
 720 %      void RelinquishMagickResource(const ResourceType type,
 721 %        const MagickSizeType size)
 722 %
 723 %  A description of each parameter follows:
 724 %
 725 %    o type: the type of resource.
 726 %
 727 %    o size: the size of the resource.
 728 %
 729 */
 730 MagickExport void RelinquishMagickResource(const ResourceType type,
 731   const MagickSizeType size)
 732 {
 733   char
 734     resource_current[MaxTextExtent],
 735     resource_limit[MaxTextExtent],
 736     resource_request[MaxTextExtent];
 737
 738   (void) FormatMagickSize(size,MagickFalse,resource_request);
 739   if (resource_semaphore == (SemaphoreInfo *) NULL)
 740     AcquireSemaphoreInfo(&resource_semaphore);
 741   LockSemaphoreInfo(resource_semaphore);
 742   switch (type)
 743   {
 744     case AreaResource:
 745     {
 746       resource_info.area=(MagickOffsetType) size;
 747       (void) FormatMagickSize((MagickSizeType) resource_info.area,MagickFalse,
 748         resource_current);
 749       (void) FormatMagickSize(resource_info.area_limit,MagickFalse,
 750         resource_limit);
 751       break;
 752     }
 753     case MemoryResource:
 754     {
 755       resource_info.memory-=size;
 756       (void) FormatMagickSize((MagickSizeType) resource_info.memory,
 757         MagickTrue,resource_current);
 758       (void) FormatMagickSize(resource_info.memory_limit,MagickTrue,
 759         resource_limit);
 760       break;
 761     }
 762     case MapResource:
 763     {
 764       resource_info.map-=size;
 765       (void) FormatMagickSize((MagickSizeType) resource_info.map,MagickTrue,
 766         resource_current);
 767       (void) FormatMagickSize(resource_info.map_limit,MagickTrue,
 768         resource_limit);
 769       break;
 770     }
 771     case DiskResource:
 772     {
 773       resource_info.disk-=size;
 774       (void) FormatMagickSize((MagickSizeType) resource_info.disk,MagickTrue,
 775         resource_current);
 776       (void) FormatMagickSize(resource_info.disk_limit,MagickTrue,
 777         resource_limit);
 778       break;
 779     }
 780     case FileResource:
 781     {
 782       resource_info.file-=size;
 783       (void) FormatMagickSize((MagickSizeType) resource_info.file,MagickFalse,
 784         resource_current);
 785       (void) FormatMagickSize((MagickSizeType) resource_info.file_limit,
 786         MagickFalse,resource_limit);
 787       break;
 788     }
 789     case ThreadResource:
 790     {
 791       resource_info.thread-=size;
 792       (void) FormatMagickSize((MagickSizeType) resource_info.thread,MagickFalse,
 793         resource_current);
 794       (void) FormatMagickSize((MagickSizeType) resource_info.thread_limit,
 795         MagickFalse,resource_limit);
 796       break;
 797     }
 798     case TimeResource:
 799     {
 800       resource_info.time-=size;
 801       (void) FormatMagickSize((MagickSizeType) resource_info.time,MagickFalse,
 802         resource_current);
 803       (void) FormatMagickSize((MagickSizeType) resource_info.time_limit,
 804         MagickFalse,resource_limit);
 805       break;
 806     }
 807     default:
 808       break;
 809   }
 810   UnlockSemaphoreInfo(resource_semaphore);
 811   (void) LogMagickEvent(ResourceEvent,GetMagickModule(),"%s: %s/%s/%s",
 812     CommandOptionToMnemonic(MagickResourceOptions,(ssize_t) type),
 813       resource_request,resource_current,resource_limit);
 814 }
 815 \f
 816 /*
 817 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 818 %                                                                             %
 819 %                                                                             %
 820 %                                                                             %
 821 %    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                  %
 822 %                                                                             %
 823 %                                                                             %
 824 %                                                                             %
 825 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 826 %
 827 %  RelinquishUniqueFileResource() relinquishes a unique file resource.
 828 %
 829 %  The format of the RelinquishUniqueFileResource() method is:
 830 %
 831 %      MagickBooleanType RelinquishUniqueFileResource(const char *path)
 832 %
 833 %  A description of each parameter follows:
 834 %
 835 %    o name: the name of the temporary resource.
 836 %
 837 */
 838 MagickExport MagickBooleanType RelinquishUniqueFileResource(const char *path)
 839 {
 840   char
 841     cache_path[MaxTextExtent];
 842
 843   assert(path != (const char *) NULL);
 844   (void) LogMagickEvent(ResourceEvent,GetMagickModule(),"%s",path);
 845   if (temporary_resources != (SplayTreeInfo *) NULL)
 846     {
 847       register char
 848         *p;
 849
 850       ResetSplayTreeIterator(temporary_resources);
 851       p=(char *) GetNextKeyInSplayTree(temporary_resources);
 852       while (p != (char *) NULL)
 853       {
 854         if (LocaleCompare(p,path) == 0)
 855           break;
 856         p=(char *) GetNextKeyInSplayTree(temporary_resources);
 857       }
 858       if (p != (char *) NULL)
 859         (void) DeleteNodeFromSplayTree(temporary_resources,p);
 860     }
 861   (void) CopyMagickString(cache_path,path,MaxTextExtent);
 862   AppendImageFormat("cache",cache_path);
 863   (void) remove(cache_path);
 864   return(remove(path) == 0 ? MagickTrue : MagickFalse);
 865 }
 866 \f
 867 /*
 868 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 869 %                                                                             %
 870 %                                                                             %
 871 %                                                                             %
 872 +   R e s o u r c e C o m p o n e n t G e n e s i s                           %
 873 %                                                                             %
 874 %                                                                             %
 875 %                                                                             %
 876 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 877 %
 878 %  ResourceComponentGenesis() instantiates the resource component.
 879 %
 880 %  The format of the ResourceComponentGenesis method is:
 881 %
 882 %      MagickBooleanType ResourceComponentGenesis(void)
 883 %
 884 */
 885
 886 static inline size_t MagickMax(const size_t x,const size_t y)
 887 {
 888   if (x > y)
 889     return(x);
 890   return(y);
 891 }
 892
 893 static inline MagickSizeType StringToSizeType(const char *string,
 894   const double interval)
 895 {
 896   double
 897     value;
 898
 899   value=SiPrefixToDouble(string,interval);
 900   if (value >= (double) MagickULLConstant(~0))
 901     return(MagickULLConstant(~0));
 902   return((MagickSizeType) value);
 903 }
 904
 905 MagickExport MagickBooleanType ResourceComponentGenesis(void)
 906 {
 907   char
 908     *limit;
 909
 910   MagickSizeType
 911     memory;
 912
 913   ssize_t
 914     files,
 915     pages,
 916     pagesize;
 917
 918   /*
 919     Set Magick resource limits.
 920   */
 921   AcquireSemaphoreInfo(&resource_semaphore);
 922   pagesize=GetMagickPageSize();
 923   pages=(-1);
 924 #if defined(MAGICKCORE_HAVE_SYSCONF) && defined(_SC_PHYS_PAGES)
 925   pages=(ssize_t) sysconf(_SC_PHYS_PAGES);
 926 #endif
 927   memory=(MagickSizeType) pages*pagesize;
 928   if ((pagesize <= 0) || (pages <= 0))
 929     memory=2048UL*1024UL*1024UL;
 930 #if defined(PixelCacheThreshold)
 931   memory=PixelCacheThreshold;
 932 #endif
 933   (void) SetMagickResourceLimit(AreaResource,2*memory/sizeof(PixelPacket));
 934   (void) SetMagickResourceLimit(MemoryResource,memory);
 935   (void) SetMagickResourceLimit(MapResource,2*memory);
 936   limit=GetEnvironmentValue("MAGICK_AREA_LIMIT");
 937   if (limit == (char *) NULL)
 938     limit=GetPolicyValue("area");
 939   if (limit != (char *) NULL)
 940     {
 941       (void) SetMagickResourceLimit(AreaResource,StringToSizeType(limit,100.0));
 942       limit=DestroyString(limit);
 943     }
 944   limit=GetEnvironmentValue("MAGICK_MEMORY_LIMIT");
 945   if (limit == (char *) NULL)
 946     limit=GetPolicyValue("memory");
 947   if (limit != (char *) NULL)
 948     {
 949       (void) SetMagickResourceLimit(MemoryResource,
 950         StringToSizeType(limit,100.0));
 951       limit=DestroyString(limit);
 952     }
 953   limit=GetEnvironmentValue("MAGICK_MAP_LIMIT");
 954   if (limit == (char *) NULL)
 955     limit=GetPolicyValue("map");
 956   if (limit != (char *) NULL)
 957     {
 958       (void) SetMagickResourceLimit(MapResource,StringToSizeType(limit,100.0));
 959       limit=DestroyString(limit);
 960     }
 961   limit=GetEnvironmentValue("MAGICK_DISK_LIMIT");
 962   if (limit == (char *) NULL)
 963     limit=GetPolicyValue("disk");
 964   if (limit != (char *) NULL)
 965     {
 966       (void) SetMagickResourceLimit(DiskResource,StringToSizeType(limit,100.0));
 967       limit=DestroyString(limit);
 968     }
 969   files=(-1);
 970 #if defined(MAGICKCORE_HAVE_SYSCONF) && defined(_SC_OPEN_MAX)
 971   files=(ssize_t) sysconf(_SC_OPEN_MAX);
 972 #endif
 973 #if defined(MAGICKCORE_HAVE_GETRLIMIT) && defined(RLIMIT_NOFILE)
 974   if (files < 0)
 975     {
 976       struct rlimit
 977         resources;
 978
 979       if (getrlimit(RLIMIT_NOFILE,&resources) != -1)
 980         files=(ssize_t) resources.rlim_cur;
 981   }
 982 #endif
 983 #if defined(MAGICKCORE_HAVE_GETDTABLESIZE) && defined(MAGICKCORE_POSIX_SUPPORT)
 984   if (files < 0)
 985     files=(ssize_t) getdtablesize();
 986 #endif
 987   if (files < 0)
 988     files=64;
 989   (void) SetMagickResourceLimit(FileResource,MagickMax((size_t)
 990     (3*files/4),64));
 991   limit=GetEnvironmentValue("MAGICK_FILE_LIMIT");
 992   if (limit == (char *) NULL)
 993     limit=GetPolicyValue("file");
 994   if (limit != (char *) NULL)
 995     {
 996       (void) SetMagickResourceLimit(FileResource,StringToSizeType(limit,100.0));
 997       limit=DestroyString(limit);
 998     }
 999   (void) SetMagickResourceLimit(ThreadResource,GetOpenMPMaximumThreads());
1000   limit=GetEnvironmentValue("MAGICK_THREAD_LIMIT");
1001   if (limit == (char *) NULL)
1002     limit=GetPolicyValue("thread");
1003   if (limit != (char *) NULL)
1004     {
1005       (void) SetMagickResourceLimit(ThreadResource,StringToSizeType(limit,
1006         100.0));
1007       limit=DestroyString(limit);
1008     }
1009   limit=GetEnvironmentValue("MAGICK_TIME_LIMIT");
1010   if (limit == (char *) NULL)
1011     limit=GetPolicyValue("time");
1012   if (limit != (char *) NULL)
1013     {
1014       (void) SetMagickResourceLimit(TimeResource,StringToSizeType(limit,100.0));
1015       limit=DestroyString(limit);
1016     }
1017   return(MagickTrue);
1018 }
1019 \f
1020 /*
1021 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1022 %                                                                             %
1023 %                                                                             %
1024 %                                                                             %
1025 +   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                         %
1026 %                                                                             %
1027 %                                                                             %
1028 %                                                                             %
1029 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1030 %
1031 %  ResourceComponentTerminus() destroys the resource component.
1032 %
1033 %  The format of the ResourceComponentTerminus() method is:
1034 %
1035 %      ResourceComponentTerminus(void)
1036 %
1037 */
1038 MagickExport void ResourceComponentTerminus(void)
1039 {
1040   if (resource_semaphore == (SemaphoreInfo *) NULL)
1041     AcquireSemaphoreInfo(&resource_semaphore);
1042   LockSemaphoreInfo(resource_semaphore);
1043   if (temporary_resources != (SplayTreeInfo *) NULL)
1044     temporary_resources=DestroySplayTree(temporary_resources);
1045   if (random_info != (RandomInfo *) NULL)
1046     random_info=DestroyRandomInfo(random_info);
1047   UnlockSemaphoreInfo(resource_semaphore);
1048   DestroySemaphoreInfo(&resource_semaphore);
1049 }
1050 \f
1051 /*
1052 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1053 %                                                                             %
1054 %                                                                             %
1055 %                                                                             %
1056 %   S e t M a g i c k R e s o u r c e L i m i t                               %
1057 %                                                                             %
1058 %                                                                             %
1059 %                                                                             %
1060 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1061 %
1062 %  SetMagickResourceLimit() sets the limit for a particular resource.
1063 %
1064 %  The format of the SetMagickResourceLimit() method is:
1065 %
1066 %      MagickBooleanType SetMagickResourceLimit(const ResourceType type,
1067 %        const MagickSizeType limit)
1068 %
1069 %  A description of each parameter follows:
1070 %
1071 %    o type: the type of resource.
1072 %
1073 %    o limit: the maximum limit for the resource.
1074 %
1075 */
1076
1077 static inline MagickSizeType MagickMin(const MagickSizeType x,
1078   const MagickSizeType y)
1079 {
1080   if (x < y)
1081     return(x);
1082   return(y);
1083 }
1084
1085 MagickExport MagickBooleanType SetMagickResourceLimit(const ResourceType type,
1086   const MagickSizeType limit)
1087 {
1088   char
1089     *value;
1090
1091   if (resource_semaphore == (SemaphoreInfo *) NULL)
1092     AcquireSemaphoreInfo(&resource_semaphore);
1093   LockSemaphoreInfo(resource_semaphore);
1094   switch (type)
1095   {
1096     case AreaResource:
1097     {
1098       resource_info.area_limit=limit;
1099       value=GetPolicyValue("area");
1100       if (value != (char *) NULL)
1101         resource_info.area_limit=MagickMin(limit,StringToSizeType(value,100.0));
1102       break;
1103     }
1104     case MemoryResource:
1105     {
1106       resource_info.memory_limit=limit;
1107       value=GetPolicyValue("memory");
1108       if (value != (char *) NULL)
1109         resource_info.memory_limit=MagickMin(limit,StringToSizeType(value,
1110           100.0));
1111       break;
1112     }
1113     case MapResource:
1114     {
1115       resource_info.map_limit=limit;
1116       value=GetPolicyValue("map");
1117       if (value != (char *) NULL)
1118         resource_info.map_limit=MagickMin(limit,StringToSizeType(value,100.0));
1119       break;
1120     }
1121     case DiskResource:
1122     {
1123       resource_info.disk_limit=limit;
1124       value=GetPolicyValue("disk");
1125       if (value != (char *) NULL)
1126         resource_info.disk_limit=MagickMin(limit,StringToSizeType(value,100.0));
1127       break;
1128     }
1129     case FileResource:
1130     {
1131       resource_info.file_limit=limit;
1132       value=GetPolicyValue("file");
1133       if (value != (char *) NULL)
1134         resource_info.file_limit=MagickMin(limit,StringToSizeType(value,100.0));
1135       break;
1136     }
1137     case ThreadResource:
1138     {
1139       resource_info.thread_limit=limit;
1140       value=GetPolicyValue("thread");
1141       if (value != (char *) NULL)
1142         resource_info.thread_limit=MagickMin(limit,StringToSizeType(value,
1143           100.0));
1144       SetOpenMPMaximumThreads((int) resource_info.thread_limit);
1145       break;
1146     }
1147     case TimeResource:
1148     {
1149       resource_info.time_limit=limit;
1150       value=GetPolicyValue("time");
1151       if (value != (char *) NULL)
1152         resource_info.time_limit=MagickMin(limit,StringToSizeType(value,100.0));
1153       break;
1154     }
1155     default:
1156       break;
1157   }
1158   UnlockSemaphoreInfo(resource_semaphore);
1159   return(MagickTrue);
1160 }