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 1999-2010 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(2048)*1024*1024,
 106     MagickULLConstant(1536)*1024*1024,
 107     MagickULLConstant(8192)*1024*1024,
 108     MagickResourceInfinity,
 109     MagickULLConstant(768),
 110     MagickULLConstant(8),
 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,MagickFalse,
 214         resource_current);
 215       (void) FormatMagickSize(resource_info.disk_limit,MagickFalse,
 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: %sB/%sB/%sB",
 263     MagickOptionToMnemonic(MagickResourceOptions,(ssize_t) type),
 264     resource_request,resource_current,resource_limit);
 265   return(status);
 266 }
 267 \f
 268 /*
 269 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 270 %                                                                             %
 271 %                                                                             %
 272 %                                                                             %
 273 +   A s y n c h r o n o u s R e s o u r c e C o m p o n e n t T e r m i n u s %
 274 %                                                                             %
 275 %                                                                             %
 276 %                                                                             %
 277 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 278 %
 279 %  AsynchronousResourceComponentTerminus() destroys the resource environment.
 280 %  It differs from ResourceComponentTerminus() in that it can be called from a
 281 %  asynchronous signal handler.
 282 %
 283 %  The format of the ResourceComponentTerminus() method is:
 284 %
 285 %      ResourceComponentTerminus(void)
 286 %
 287 */
 288 MagickExport void AsynchronousResourceComponentTerminus(void)
 289 {
 290   const char
 291     *path;
 292
 293   if (temporary_resources == (SplayTreeInfo *) NULL)
 294     return;
 295   /*
 296     Remove any lingering temporary files.
 297   */
 298   ResetSplayTreeIterator(temporary_resources);
 299   path=(const char *) GetNextKeyInSplayTree(temporary_resources);
 300   while (path != (const char *) NULL)
 301   {
 302     (void) remove(path);
 303     path=(const char *) GetNextKeyInSplayTree(temporary_resources);
 304   }
 305 }
 306 \f
 307 /*
 308 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 309 %                                                                             %
 310 %                                                                             %
 311 %                                                                             %
 312 %   A c q u i r e U n i q u e F i l e R e s o u r c e                         %
 313 %                                                                             %
 314 %                                                                             %
 315 %                                                                             %
 316 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 317 %
 318 %  AcquireUniqueFileResource() returns a unique file name, and returns a file
 319 %  descriptor for the file open for reading and writing.
 320 %
 321 %  The format of the AcquireUniqueFileResource() method is:
 322 %
 323 %      int AcquireUniqueFileResource(char *path)
 324 %
 325 %  A description of each parameter follows:
 326 %
 327 %   o  path:  Specifies a pointer to an array of characters.  The unique path
 328 %      name is returned in this array.
 329 %
 330 */
 331
 332 static void *DestroyTemporaryResources(void *temporary_resource)
 333 {
 334   (void) remove((char *) temporary_resource);
 335   temporary_resource=DestroyString((char *) temporary_resource);
 336   return((void *) NULL);
 337 }
 338
 339 static MagickBooleanType GetPathTemplate(char *path)
 340 {
 341   char
 342     *directory;
 343
 344   ExceptionInfo
 345     *exception;
 346
 347   MagickBooleanType
 348     status;
 349
 350   register char
 351     *p;
 352
 353   struct stat
 354     attributes;
 355
 356   (void) CopyMagickString(path,"magick-XXXXXXXX",MaxTextExtent);
 357   exception=AcquireExceptionInfo();
 358   directory=(char *) GetImageRegistry(StringRegistryType,"temporary-path",
 359     exception);
 360   exception=DestroyExceptionInfo(exception);
 361   if (directory == (char *) NULL)
 362     directory=GetEnvironmentValue("MAGICK_TEMPORARY_PATH");
 363   if (directory == (char *) NULL)
 364     directory=GetEnvironmentValue("MAGICK_TMPDIR");
 365   if (directory == (char *) NULL)
 366     directory=GetPolicyValue("temporary-path");
 367   if (directory == (char *) NULL)
 368     directory=GetEnvironmentValue("TMPDIR");
 369 #if defined(MAGICKCORE_WINDOWS_SUPPORT) || defined(__OS2__)
 370   if (directory == (char *) NULL)
 371     directory=GetEnvironmentValue("TMP");
 372   if (directory == (char *) NULL)
 373     directory=GetEnvironmentValue("TEMP");
 374 #endif
 375 #if defined(__VMS)
 376   if (directory == (char *) NULL)
 377     directory=GetEnvironmentValue("MTMPDIR");
 378 #endif
 379 #if defined(P_tmpdir)
 380   if (directory == (char *) NULL)
 381     directory=ConstantString(P_tmpdir);
 382 #endif
 383   if (directory == (char *) NULL)
 384     return(MagickTrue);
 385   if (strlen(directory) > (MaxTextExtent-15))
 386     {
 387       directory=DestroyString(directory);
 388       return(MagickTrue);
 389     }
 390   status=GetPathAttributes(directory,&attributes);
 391   if ((status == MagickFalse) || !S_ISDIR(attributes.st_mode))
 392     {
 393       directory=DestroyString(directory);
 394       return(MagickTrue);
 395     }
 396   if (directory[strlen(directory)-1] == *DirectorySeparator)
 397     (void) FormatMagickString(path,MaxTextExtent,"%smagick-XXXXXXXX",directory);
 398   else
 399     (void) FormatMagickString(path,MaxTextExtent,"%s%smagick-XXXXXXXX",
 400       directory,DirectorySeparator);
 401   directory=DestroyString(directory);
 402   if (*DirectorySeparator != '/')
 403     for (p=path; *p != '\0'; p++)
 404       if (*p == *DirectorySeparator)
 405         *p='/';
 406   return(MagickTrue);
 407 }
 408
 409 MagickExport int AcquireUniqueFileResource(char *path)
 410 {
 411 #if !defined(O_NOFOLLOW)
 412 #define O_NOFOLLOW 0
 413 #endif
 414 #if !defined(TMP_MAX)
 415 # define TMP_MAX  238328
 416 #endif
 417
 418   int
 419     c,
 420     file;
 421
 422   register char
 423     *p;
 424
 425   register ssize_t
 426     i;
 427
 428   static const char
 429     portable_filename[65] =
 430       "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789_-";
 431
 432   StringInfo
 433     *key;
 434
 435   unsigned char
 436     *datum;
 437
 438   assert(path != (char *) NULL);
 439   (void) LogMagickEvent(ResourceEvent,GetMagickModule(),"%s",path);
 440   if (random_info == (RandomInfo *) NULL)
 441     random_info=AcquireRandomInfo();
 442   file=(-1);
 443   for (i=0; i < (ssize_t) TMP_MAX; i++)
 444   {
 445     /*
 446       Get temporary pathname.
 447     */
 448     (void) GetPathTemplate(path);
 449 #if defined(MAGICKCORE_HAVE_MKSTEMP)
 450     file=mkstemp(path);
 451 #if defined(__OS2__)
 452     setmode(file,O_BINARY);
 453 #endif
 454     if (file != -1)
 455       break;
 456 #endif
 457     key=GetRandomKey(random_info,8);
 458     p=path+strlen(path)-8;
 459     datum=GetStringInfoDatum(key);
 460     for (i=0; i < 8; i++)
 461     {
 462       c=(int) (datum[i] & 0x3f);
 463       *p++=portable_filename[c];
 464     }
 465     key=DestroyStringInfo(key);
 466     file=open(path,O_RDWR | O_CREAT | O_EXCL | O_BINARY | O_NOFOLLOW,S_MODE);
 467     if ((file > 0) || (errno != EEXIST))
 468       break;
 469   }
 470   (void) LogMagickEvent(ResourceEvent,GetMagickModule(),"%s",path);
 471   if (file == -1)
 472     return(file);
 473   if (resource_semaphore == (SemaphoreInfo *) NULL)
 474     AcquireSemaphoreInfo(&resource_semaphore);
 475   LockSemaphoreInfo(resource_semaphore);
 476   if (temporary_resources == (SplayTreeInfo *) NULL)
 477     temporary_resources=NewSplayTree(CompareSplayTreeString,
 478       DestroyTemporaryResources,(void *(*)(void *)) NULL);
 479   UnlockSemaphoreInfo(resource_semaphore);
 480   (void) AddValueToSplayTree(temporary_resources,ConstantString(path),
 481     (const void *) NULL);
 482   return(file);
 483 }
 484 \f
 485 /*
 486 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 487 %                                                                             %
 488 %                                                                             %
 489 %                                                                             %
 490 %   G e t M a g i c k R e s o u r c e                                         %
 491 %                                                                             %
 492 %                                                                             %
 493 %                                                                             %
 494 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 495 %
 496 %  GetMagickResource() returns the specified resource.
 497 %
 498 %  The format of the GetMagickResource() method is:
 499 %
 500 %      MagickSizeType GetMagickResource(const ResourceType type)
 501 %
 502 %  A description of each parameter follows:
 503 %
 504 %    o type: the type of resource.
 505 %
 506 */
 507 MagickExport MagickSizeType GetMagickResource(const ResourceType type)
 508 {
 509   MagickSizeType
 510     resource;
 511
 512   resource=0;
 513   LockSemaphoreInfo(resource_semaphore);
 514   switch (type)
 515   {
 516     case AreaResource:
 517     {
 518       resource=(MagickSizeType) resource_info.area;
 519       break;
 520     }
 521     case MemoryResource:
 522     {
 523       resource=(MagickSizeType) resource_info.memory;
 524       break;
 525     }
 526     case MapResource:
 527     {
 528       resource=(MagickSizeType) resource_info.map;
 529       break;
 530     }
 531     case DiskResource:
 532     {
 533       resource=(MagickSizeType) resource_info.disk;
 534       break;
 535     }
 536     case FileResource:
 537     {
 538       resource=(MagickSizeType) resource_info.file;
 539       break;
 540     }
 541     case ThreadResource:
 542     {
 543       resource=(MagickSizeType) resource_info.thread;
 544       break;
 545     }
 546     case TimeResource:
 547     {
 548       resource=(MagickSizeType) resource_info.time;
 549       break;
 550     }
 551     default:
 552       break;
 553   }
 554   UnlockSemaphoreInfo(resource_semaphore);
 555   return(resource);
 556 }
 557 \f
 558 /*
 559 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 560 %                                                                             %
 561 %                                                                             %
 562 %                                                                             %
 563 %   G e t M a g i c k R e s o u r c e L i m i t                               %
 564 %                                                                             %
 565 %                                                                             %
 566 %                                                                             %
 567 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 568 %
 569 %  GetMagickResource() returns the specified resource limit.
 570 %
 571 %  The format of the GetMagickResourceLimit() method is:
 572 %
 573 %      MagickSizeType GetMagickResourceLimit(const ResourceType type)
 574 %
 575 %  A description of each parameter follows:
 576 %
 577 %    o type: the type of resource.
 578 %
 579 */
 580 MagickExport MagickSizeType GetMagickResourceLimit(const ResourceType type)
 581 {
 582   MagickSizeType
 583     resource;
 584
 585   resource=0;
 586   if (resource_semaphore == (SemaphoreInfo *) NULL)
 587     AcquireSemaphoreInfo(&resource_semaphore);
 588   LockSemaphoreInfo(resource_semaphore);
 589   switch (type)
 590   {
 591     case AreaResource:
 592     {
 593       resource=resource_info.area_limit;
 594       break;
 595     }
 596     case MemoryResource:
 597     {
 598       resource=resource_info.memory_limit;
 599       break;
 600     }
 601     case MapResource:
 602     {
 603       resource=resource_info.map_limit;
 604       break;
 605     }
 606     case DiskResource:
 607     {
 608       resource=resource_info.disk_limit;
 609       break;
 610     }
 611     case FileResource:
 612     {
 613       resource=resource_info.file_limit;
 614       break;
 615     }
 616     case ThreadResource:
 617     {
 618       resource=resource_info.thread_limit;
 619       break;
 620     }
 621     case TimeResource:
 622     {
 623       resource=resource_info.time_limit;
 624       break;
 625     }
 626     default:
 627       break;
 628   }
 629   UnlockSemaphoreInfo(resource_semaphore);
 630   return(resource);
 631 }
 632 \f
 633 /*
 634 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 635 %                                                                             %
 636 %                                                                             %
 637 %                                                                             %
 638 %  L i s t M a g i c k R e s o u r c e I n f o                                %
 639 %                                                                             %
 640 %                                                                             %
 641 %                                                                             %
 642 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 643 %
 644 %  ListMagickResourceInfo() lists the resource info to a file.
 645 %
 646 %  The format of the ListMagickResourceInfo method is:
 647 %
 648 %      MagickBooleanType ListMagickResourceInfo(FILE *file,
 649 %        ExceptionInfo *exception)
 650 %
 651 %  A description of each parameter follows.
 652 %
 653 %    o file:  An pointer to a FILE.
 654 %
 655 %    o exception: return any errors or warnings in this structure.
 656 %
 657 */
 658 MagickExport MagickBooleanType ListMagickResourceInfo(FILE *file,
 659   ExceptionInfo *magick_unused(exception))
 660 {
 661   char
 662     area_limit[MaxTextExtent],
 663     disk_limit[MaxTextExtent],
 664     map_limit[MaxTextExtent],
 665     memory_limit[MaxTextExtent],
 666     time_limit[MaxTextExtent];
 667
 668   if (file == (const FILE *) NULL)
 669     file=stdout;
 670   if (resource_semaphore == (SemaphoreInfo *) NULL)
 671     AcquireSemaphoreInfo(&resource_semaphore);
 672   LockSemaphoreInfo(resource_semaphore);
 673   (void) FormatMagickSize(resource_info.area_limit,MagickFalse,area_limit);
 674   (void) FormatMagickSize(resource_info.memory_limit,MagickTrue,memory_limit);
 675   (void) FormatMagickSize(resource_info.map_limit,MagickTrue,map_limit);
 676   (void) FormatMagickSize(resource_info.disk_limit,MagickFalse,disk_limit);
 677   (void) CopyMagickString(time_limit,"unlimited",MaxTextExtent);
 678   if (resource_info.time_limit != MagickResourceInfinity)
 679     (void) FormatMagickString(time_limit,MaxTextExtent,"%.20g",(double)
 680       resource_info.time_limit);
 681   (void) fprintf(file,"File         Area       Memory          Map"
 682     "         Disk    Thread         Time\n");
 683   (void) fprintf(file,"--------------------------------------------------------"
 684     "-----------------------\n");
 685   (void) fprintf(file,"%4g  %10sB  %10sB  %10sB  %10sB    %6g  %11s\n",(double)
 686     resource_info.file_limit,area_limit,memory_limit,map_limit,disk_limit,
 687     (double) resource_info.thread_limit,time_limit);
 688   (void) fflush(file);
 689   UnlockSemaphoreInfo(resource_semaphore);
 690   return(MagickTrue);
 691 }
 692 \f
 693 /*
 694 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 695 %                                                                             %
 696 %                                                                             %
 697 %                                                                             %
 698 %   R e l i n q u i s h M a g i c k R e s o u r c e                           %
 699 %                                                                             %
 700 %                                                                             %
 701 %                                                                             %
 702 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 703 %
 704 %  RelinquishMagickResource() relinquishes resources of the specified type.
 705 %
 706 %  The format of the RelinquishMagickResource() method is:
 707 %
 708 %      void RelinquishMagickResource(const ResourceType type,
 709 %        const MagickSizeType size)
 710 %
 711 %  A description of each parameter follows:
 712 %
 713 %    o type: the type of resource.
 714 %
 715 %    o size: the size of the resource.
 716 %
 717 */
 718 MagickExport void RelinquishMagickResource(const ResourceType type,
 719   const MagickSizeType size)
 720 {
 721   char
 722     resource_current[MaxTextExtent],
 723     resource_limit[MaxTextExtent],
 724     resource_request[MaxTextExtent];
 725
 726   (void) FormatMagickSize(size,MagickFalse,resource_request);
 727   if (resource_semaphore == (SemaphoreInfo *) NULL)
 728     AcquireSemaphoreInfo(&resource_semaphore);
 729   LockSemaphoreInfo(resource_semaphore);
 730   switch (type)
 731   {
 732     case AreaResource:
 733     {
 734       resource_info.area=(MagickOffsetType) size;
 735       (void) FormatMagickSize((MagickSizeType) resource_info.area,MagickFalse,
 736         resource_current);
 737       (void) FormatMagickSize(resource_info.area_limit,MagickFalse,
 738         resource_limit);
 739       break;
 740     }
 741     case MemoryResource:
 742     {
 743       resource_info.memory-=size;
 744       (void) FormatMagickSize((MagickSizeType) resource_info.memory,
 745         MagickTrue,resource_current);
 746       (void) FormatMagickSize(resource_info.memory_limit,MagickTrue,
 747         resource_limit);
 748       break;
 749     }
 750     case MapResource:
 751     {
 752       resource_info.map-=size;
 753       (void) FormatMagickSize((MagickSizeType) resource_info.map,MagickTrue,
 754         resource_current);
 755       (void) FormatMagickSize(resource_info.map_limit,MagickTrue,
 756         resource_limit);
 757       break;
 758     }
 759     case DiskResource:
 760     {
 761       resource_info.disk-=size;
 762       (void) FormatMagickSize((MagickSizeType) resource_info.disk,MagickFalse,
 763         resource_current);
 764       (void) FormatMagickSize(resource_info.disk_limit,MagickFalse,
 765         resource_limit);
 766       break;
 767     }
 768     case FileResource:
 769     {
 770       resource_info.file-=size;
 771       (void) FormatMagickSize((MagickSizeType) resource_info.file,MagickFalse,
 772         resource_current);
 773       (void) FormatMagickSize((MagickSizeType) resource_info.file_limit,
 774         MagickFalse,resource_limit);
 775       break;
 776     }
 777     case ThreadResource:
 778     {
 779       resource_info.thread-=size;
 780       (void) FormatMagickSize((MagickSizeType) resource_info.thread,MagickFalse,
 781         resource_current);
 782       (void) FormatMagickSize((MagickSizeType) resource_info.thread_limit,
 783         MagickFalse,resource_limit);
 784       break;
 785     }
 786     case TimeResource:
 787     {
 788       resource_info.time-=size;
 789       (void) FormatMagickSize((MagickSizeType) resource_info.time,MagickFalse,
 790         resource_current);
 791       (void) FormatMagickSize((MagickSizeType) resource_info.time_limit,
 792         MagickFalse,resource_limit);
 793       break;
 794     }
 795     default:
 796       break;
 797   }
 798   UnlockSemaphoreInfo(resource_semaphore);
 799   (void) LogMagickEvent(ResourceEvent,GetMagickModule(),"%s: %sB/%sB/%sB",
 800     MagickOptionToMnemonic(MagickResourceOptions,(ssize_t) type),
 801       resource_request,resource_current,resource_limit);
 802 }
 803 \f
 804 /*
 805 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 806 %                                                                             %
 807 %                                                                             %
 808 %                                                                             %
 809 %    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                  %
 810 %                                                                             %
 811 %                                                                             %
 812 %                                                                             %
 813 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 814 %
 815 %  RelinquishUniqueFileResource() relinquishes a unique file resource.
 816 %
 817 %  The format of the RelinquishUniqueFileResource() method is:
 818 %
 819 %      MagickBooleanType RelinquishUniqueFileResource(const char *path)
 820 %
 821 %  A description of each parameter follows:
 822 %
 823 %    o name: the name of the temporary resource.
 824 %
 825 */
 826 MagickExport MagickBooleanType RelinquishUniqueFileResource(const char *path)
 827 {
 828   char
 829     cache_path[MaxTextExtent];
 830
 831   assert(path != (const char *) NULL);
 832   (void) LogMagickEvent(ResourceEvent,GetMagickModule(),"%s",path);
 833   if (temporary_resources != (SplayTreeInfo *) NULL)
 834     {
 835       register char
 836         *p;
 837
 838       ResetSplayTreeIterator(temporary_resources);
 839       p=(char *) GetNextKeyInSplayTree(temporary_resources);
 840       while (p != (char *) NULL)
 841       {
 842         if (LocaleCompare(p,path) == 0)
 843           break;
 844         p=(char *) GetNextKeyInSplayTree(temporary_resources);
 845       }
 846       if (p != (char *) NULL)
 847         (void) DeleteNodeFromSplayTree(temporary_resources,p);
 848     }
 849   (void) CopyMagickString(cache_path,path,MaxTextExtent);
 850   AppendImageFormat("cache",cache_path);
 851   (void) remove(cache_path);
 852   return(remove(path) == 0 ? MagickTrue : MagickFalse);
 853 }
 854 \f
 855 /*
 856 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 857 %                                                                             %
 858 %                                                                             %
 859 %                                                                             %
 860 +   R e s o u r c e C o m p o n e n t G e n e s i s                           %
 861 %                                                                             %
 862 %                                                                             %
 863 %                                                                             %
 864 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 865 %
 866 %  ResourceComponentGenesis() instantiates the resource component.
 867 %
 868 %  The format of the ResourceComponentGenesis method is:
 869 %
 870 %      MagickBooleanType ResourceComponentGenesis(void)
 871 %
 872 */
 873
 874 static inline size_t MagickMax(const size_t x,
 875   const size_t y)
 876 {
 877   if (x > y)
 878     return(x);
 879   return(y);
 880 }
 881
 882 static inline MagickSizeType StringToSizeType(const char *string,
 883   const double interval)
 884 {
 885   double
 886     value;
 887
 888   value=SiPrefixToDouble(string,interval);
 889   if (value >= (double) MagickULLConstant(~0))
 890     return(MagickULLConstant(~0));
 891   return((MagickSizeType) value);
 892 }
 893
 894 MagickExport MagickBooleanType ResourceComponentGenesis(void)
 895 {
 896   char
 897     *limit;
 898
 899   ssize_t
 900     files,
 901     pages,
 902     pagesize;
 903
 904   MagickSizeType
 905     memory;
 906
 907   /*
 908     Set Magick resource limits.
 909   */
 910   AcquireSemaphoreInfo(&resource_semaphore);
 911   pagesize=GetMagickPageSize();
 912   pages=(-1);
 913 #if defined(MAGICKCORE_HAVE_SYSCONF) && defined(_SC_PHYS_PAGES)
 914   pages=(ssize_t) sysconf(_SC_PHYS_PAGES);
 915 #endif
 916   memory=(MagickSizeType) pages*pagesize;
 917   if ((pagesize <= 0) || (pages <= 0))
 918     memory=2048UL*1024UL*1024UL;
 919 #if defined(PixelCacheThreshold)
 920   memory=PixelCacheThreshold;
 921 #endif
 922   (void) SetMagickResourceLimit(AreaResource,2UL*memory);
 923   (void) SetMagickResourceLimit(MemoryResource,3UL*memory/2UL);
 924   (void) SetMagickResourceLimit(MapResource,4UL*memory);
 925   limit=GetEnvironmentValue("MAGICK_AREA_LIMIT");
 926   if (limit == (char *) NULL)
 927     limit=GetPolicyValue("area");
 928   if (limit != (char *) NULL)
 929     {
 930       (void) SetMagickResourceLimit(AreaResource,StringToSizeType(limit,100.0));
 931       limit=DestroyString(limit);
 932     }
 933   limit=GetEnvironmentValue("MAGICK_MEMORY_LIMIT");
 934   if (limit == (char *) NULL)
 935     limit=GetPolicyValue("memory");
 936   if (limit != (char *) NULL)
 937     {
 938       (void) SetMagickResourceLimit(MemoryResource,
 939         StringToSizeType(limit,100.0));
 940       limit=DestroyString(limit);
 941     }
 942   limit=GetEnvironmentValue("MAGICK_MAP_LIMIT");
 943   if (limit == (char *) NULL)
 944     limit=GetPolicyValue("map");
 945   if (limit != (char *) NULL)
 946     {
 947       (void) SetMagickResourceLimit(MapResource,StringToSizeType(limit,100.0));
 948       limit=DestroyString(limit);
 949     }
 950   limit=GetEnvironmentValue("MAGICK_DISK_LIMIT");
 951   if (limit == (char *) NULL)
 952     limit=GetPolicyValue("disk");
 953   if (limit != (char *) NULL)
 954     {
 955       (void) SetMagickResourceLimit(DiskResource,StringToSizeType(limit,100.0));
 956       limit=DestroyString(limit);
 957     }
 958   files=(-1);
 959 #if defined(MAGICKCORE_HAVE_SYSCONF) && defined(_SC_OPEN_MAX)
 960   files=(ssize_t) sysconf(_SC_OPEN_MAX);
 961 #endif
 962 #if defined(MAGICKCORE_HAVE_GETRLIMIT) && defined(RLIMIT_NOFILE)
 963   if (files < 0)
 964     {
 965       struct rlimit
 966         resources;
 967
 968       if (getrlimit(RLIMIT_NOFILE,&resources) != -1)
 969         files=(ssize_t) resources.rlim_cur;
 970   }
 971 #endif
 972 #if defined(MAGICKCORE_HAVE_GETDTABLESIZE) && defined(MAGICKCORE_POSIX_SUPPORT)
 973   if (files < 0)
 974     files=(ssize_t) getdtablesize();
 975 #endif
 976   if (files < 0)
 977     files=64;
 978   (void) SetMagickResourceLimit(FileResource,MagickMax((size_t)
 979     (3*files/4),64));
 980   limit=GetEnvironmentValue("MAGICK_FILE_LIMIT");
 981   if (limit == (char *) NULL)
 982     limit=GetPolicyValue("file");
 983   if (limit != (char *) NULL)
 984     {
 985       (void) SetMagickResourceLimit(FileResource,StringToSizeType(limit,100.0));
 986       limit=DestroyString(limit);
 987     }
 988   (void) SetMagickResourceLimit(ThreadResource,GetOpenMPMaximumThreads());
 989   limit=GetEnvironmentValue("MAGICK_THREAD_LIMIT");
 990   if (limit == (char *) NULL)
 991     limit=GetPolicyValue("thread");
 992   if (limit != (char *) NULL)
 993     {
 994       SetOpenMPMaximumThreads((int) StringToUnsignedLong(limit));
 995       (void) SetMagickResourceLimit(ThreadResource,StringToSizeType(limit,
 996         100.0));
 997       limit=DestroyString(limit);
 998     }
 999   limit=GetEnvironmentValue("MAGICK_TIME_LIMIT");
1000   if (limit == (char *) NULL)
1001     limit=GetPolicyValue("time");
1002   if (limit != (char *) NULL)
1003     {
1004       (void) SetMagickResourceLimit(TimeResource,StringToSizeType(limit,100.0));
1005       limit=DestroyString(limit);
1006     }
1007   return(MagickTrue);
1008 }
1009 \f
1010 /*
1011 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1012 %                                                                             %
1013 %                                                                             %
1014 %                                                                             %
1015 +   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                         %
1016 %                                                                             %
1017 %                                                                             %
1018 %                                                                             %
1019 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1020 %
1021 %  ResourceComponentTerminus() destroys the resource component.
1022 %
1023 %  The format of the ResourceComponentTerminus() method is:
1024 %
1025 %      ResourceComponentTerminus(void)
1026 %
1027 */
1028 MagickExport void ResourceComponentTerminus(void)
1029 {
1030   if (resource_semaphore == (SemaphoreInfo *) NULL)
1031     AcquireSemaphoreInfo(&resource_semaphore);
1032   LockSemaphoreInfo(resource_semaphore);
1033   if (temporary_resources != (SplayTreeInfo *) NULL)
1034     temporary_resources=DestroySplayTree(temporary_resources);
1035   if (random_info != (RandomInfo *) NULL)
1036     random_info=DestroyRandomInfo(random_info);
1037   UnlockSemaphoreInfo(resource_semaphore);
1038   DestroySemaphoreInfo(&resource_semaphore);
1039 }
1040 \f
1041 /*
1042 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1043 %                                                                             %
1044 %                                                                             %
1045 %                                                                             %
1046 %   S e t M a g i c k R e s o u r c e L i m i t                               %
1047 %                                                                             %
1048 %                                                                             %
1049 %                                                                             %
1050 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1051 %
1052 %  SetMagickResourceLimit() sets the limit for a particular resource.
1053 %
1054 %  The format of the SetMagickResourceLimit() method is:
1055 %
1056 %      MagickBooleanType SetMagickResourceLimit(const ResourceType type,
1057 %        const MagickSizeType limit)
1058 %
1059 %  A description of each parameter follows:
1060 %
1061 %    o type: the type of resource.
1062 %
1063 %    o limit: the maximum limit for the resource.
1064 %
1065 */
1066 MagickExport MagickBooleanType SetMagickResourceLimit(const ResourceType type,
1067   const MagickSizeType limit)
1068 {
1069   if (resource_semaphore == (SemaphoreInfo *) NULL)
1070     AcquireSemaphoreInfo(&resource_semaphore);
1071   LockSemaphoreInfo(resource_semaphore);
1072   switch (type)
1073   {
1074     case AreaResource:
1075     {
1076       resource_info.area_limit=limit;
1077       break;
1078     }
1079     case MemoryResource:
1080     {
1081       resource_info.memory_limit=limit;
1082       break;
1083     }
1084     case MapResource:
1085     {
1086       resource_info.map_limit=limit;
1087       break;
1088     }
1089     case DiskResource:
1090     {
1091       resource_info.disk_limit=limit;
1092       break;
1093     }
1094     case FileResource:
1095     {
1096       resource_info.file_limit=limit;
1097       break;
1098     }
1099     case ThreadResource:
1100     {
1101       SetOpenMPMaximumThreads((int) limit);
1102       resource_info.thread_limit=limit;
1103       break;
1104     }
1105     case TimeResource:
1106     {
1107       resource_info.time_limit=limit;
1108       break;
1109     }
1110     default:
1111       break;
1112   }
1113   UnlockSemaphoreInfo(resource_semaphore);
1114   return(MagickTrue);
1115 }