src/ThreadTasks.cpp

   1 //
   2 // This file is part of the aMule Project.
   3 //
   4 // Copyright (c) 2006-2008 Mikkel Schubert ( xaignar@amule.org / http:://www.amule.org )
   5 // Copyright (c) 2003-2008 aMule Team ( admin@amule.org / http://www.amule.org )
   6 // Copyright (c) 2002-2008 Merkur ( devs@emule-project.net / http://www.emule-project.net )
   7 //
   8 // Any parts of this program derived from the xMule, lMule or eMule project,
   9 // or contributed by third-party developers are copyrighted by their
  10 // respective authors.
  11 //
  12 // This program is free software; you can redistribute it and/or modify
  13 // it under the terms of the GNU General Public License as published by
  14 // the Free Software Foundation; either version 2 of the License, or
  15 // (at your option) any later version.
  16 //
  17 // This program is distributed in the hope that it will be useful,
  18 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  19 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20 // GNU General Public License for more details.
  21 //
  22 // You should have received a copy of the GNU General Public License
  23 // along with this program; if not, write to the Free Software
  24 // Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301, USA
  25 //
  26
  27
  28 #include <wx/app.h>                     // Needed for wxTheApp
  29
  30 #include "ThreadTasks.h"                // Interface declarations
  31 #include "PartFile.h"                   // Needed for CPartFile
  32 #include "Logger.h"                     // Needed for Add(Debug)LogLineM
  33 #include <common/Format.h>              // Needed for CFormat
  34 #include "amule.h"                      // Needed for theApp
  35 #include "KnownFileList.h"              // Needed for theApp->knownfiles
  36 #include "Preferences.h"                // Needed for thePrefs
  37 #include "ScopedPtr.h"                  // Needed for CScopedPtr and CScopedArray
  38 #include "PlatformSpecific.h"           // Needed for CanFSHandleSpecialChars
  39
  40 #ifdef HAVE_CONFIG_H
  41 #       include "config.h"
  42 #endif
  43
  44 //! This hash represents the value for an empty MD4 hashing
  45 const byte g_emptyMD4Hash[16] = {
  46         0x31, 0xD6, 0xCF, 0xE0, 0xD1, 0x6A, 0xE9, 0x31,
  47         0xB7, 0x3C, 0x59, 0xD7, 0xE0, 0xC0, 0x89, 0xC0 };
  48
  49
  50 ////////////////////////////////////////////////////////////
  51 // CHashingTask
  52
  53 CHashingTask::CHashingTask(const CPath& path, const CPath& filename, const CPartFile* part)
  54         // GetPrintable is used to improve the readability of the log.
  55         : CThreadTask(wxT("Hashing"), path.JoinPaths(filename).GetPrintable(), (part ? ETP_High : ETP_Normal)),
  56           m_path(path),
  57           m_filename(filename),
  58           m_toHash((EHashes)(EH_MD4 | EH_AICH)),
  59           m_owner(part)
  60 {
  61         // We can only create the AICH hashset if the file is a knownfile or
  62         // if the partfile is complete, since the MD4 hashset is checked first,
  63         // so that the AICH hashset only gets assigned if the MD4 hashset
  64         // matches what we expected. Due to the rareity of post-completion
  65         // corruptions, this gives us a nice speedup in most cases.
  66         if (part && !part->GetGapList().empty()) {
  67                 m_toHash = EH_MD4;
  68         }
  69 }
  70
  71
  72 CHashingTask::CHashingTask(const CKnownFile* toAICHHash)
  73         // GetPrintable is used to improve the readability of the log.
  74         : CThreadTask(wxT("AICH Hashing"), toAICHHash->GetFilePath().JoinPaths(toAICHHash->GetFileName()).GetPrintable(), ETP_Low),
  75           m_path(toAICHHash->GetFilePath()),
  76           m_filename(toAICHHash->GetFileName()),
  77           m_toHash(EH_AICH),
  78           m_owner(toAICHHash)
  79 {
  80 }
  81
  82
  83 void CHashingTask::Entry()
  84 {
  85         CFileAutoClose file;
  86
  87         CPath fullPath = m_path.JoinPaths(m_filename);
  88         if (!file.Open(fullPath, CFile::read)) {
  89                 AddDebugLogLineM(true, logHasher,
  90                         CFormat(wxT("Warning, failed to open file, skipping: %s")) % fullPath);
  91                 return;
  92         }
  93
  94         uint64 fileLength = 0;
  95         try {
  96                 fileLength = file.GetLength();
  97         } catch (const CIOFailureException&) {
  98                 AddDebugLogLineM(true, logHasher,
  99                         CFormat(wxT("Warning, failed to retrieve file-length, skipping: %s")) % fullPath);
 100                 return;
 101         }
 102
 103         if (fileLength > MAX_FILE_SIZE) {
 104                 AddDebugLogLineM(true, logHasher,
 105                         CFormat(wxT("Warning, file is larger than supported size, skipping: %s")) % fullPath);
 106                 return;
 107         } else if (fileLength == 0) {
 108                 if (m_owner) {
 109                         // It makes no sense to try to hash empty partfiles ...
 110                         wxFAIL;
 111                 } else {
 112                         // Zero-size partfiles should be hashed, but not zero-sized shared-files.
 113                         AddDebugLogLineM( true, logHasher,
 114                                 CFormat(wxT("Warning, 0-size file, skipping: %s")) % fullPath);
 115                 }
 116
 117                 return;
 118         }
 119
 120         // For thread-safety, results are passed via a temporary file object.
 121         CScopedPtr<CKnownFile> knownfile(new CKnownFile());
 122         knownfile->m_filePath = m_path;
 123         knownfile->SetFileName(m_filename);
 124         knownfile->SetFileSize(fileLength);
 125         knownfile->m_lastDateChanged = CPath::GetModificationTime(fullPath);
 126         knownfile->m_AvailPartFrequency.insert(
 127                 knownfile->m_AvailPartFrequency.begin(),
 128                 knownfile->GetPartCount(), 0);
 129
 130         if ((m_toHash & EH_MD4) && (m_toHash & EH_AICH)) {
 131                 knownfile->GetAICHHashset()->FreeHashSet();
 132                 AddDebugLogLineM( false, logHasher, CFormat(
 133                         _("Starting to create MD4 and AICH hash for file: %s")) %
 134                         m_filename );
 135         } else if ((m_toHash & EH_MD4)) {
 136                 AddDebugLogLineM( false, logHasher, CFormat(
 137                         _("Starting to create MD4 hash for file: %s")) % m_filename );
 138         } else if ((m_toHash & EH_AICH)) {
 139                 knownfile->GetAICHHashset()->FreeHashSet();
 140                 AddDebugLogLineM( false, logHasher, CFormat(
 141                         _("Starting to create AICH hash for file: %s")) % m_filename );
 142         } else {
 143                 wxCHECK_RET(0, (CFormat(wxT("No hashes requested for file, skipping: %s"))
 144                         % m_filename).GetString());
 145         }
 146
 147
 148         // This loops creates the part-hashes, loop-de-loop.
 149         try {
 150                 for (uint16 part = 0; part < knownfile->GetPartCount() && !TestDestroy(); part++) {
 151                         if (CreateNextPartHash(file, part, knownfile.get(), m_toHash) == false) {
 152                                 AddDebugLogLineM(true, logHasher,
 153                                         CFormat(wxT("Error while hashing file, skipping: %s"))
 154                                                 % m_filename);
 155
 156                                 return;
 157                         }
 158                 }
 159         } catch (const CSafeIOException& e) {
 160                 AddDebugLogLineM(true, logHasher, wxT("IO exception while hashing file: ") + e.what());
 161                 return;
 162         }
 163
 164         if ((m_toHash & EH_MD4) && !TestDestroy()) {
 165                 // If the file is < PARTSIZE, then the filehash is that one hash,
 166                 // otherwise, the filehash is the hash of the parthashes
 167                 if ( knownfile->m_hashlist.size() == 1 ) {
 168                         knownfile->m_abyFileHash = knownfile->m_hashlist[0];
 169                         knownfile->m_hashlist.clear();
 170                 } else if ( knownfile->m_hashlist.size() ) {
 171                         CMD4Hash hash;
 172                         knownfile->CreateHashFromHashlist(knownfile->m_hashlist, &hash);
 173                         knownfile->m_abyFileHash = hash;
 174                 } else {
 175                         // This should not happen!
 176                         wxFAIL;
 177                 }
 178         }
 179
 180         // Did we create a AICH hashset?
 181         if ((m_toHash & EH_AICH) && !TestDestroy()) {
 182                 CAICHHashSet* AICHHashSet = knownfile->GetAICHHashset();
 183
 184                 AICHHashSet->ReCalculateHash(false);
 185                 if (AICHHashSet->VerifyHashTree(true) ) {
 186                         AICHHashSet->SetStatus(AICH_HASHSETCOMPLETE);
 187                         if (!AICHHashSet->SaveHashSet()) {
 188                                 AddDebugLogLineM( true, logHasher,
 189                                         CFormat(wxT("Warning, failed to save AICH hashset for file: %s"))
 190                                                 % m_filename );
 191                         }
 192                 }
 193         }
 194
 195         if ((m_toHash == EH_AICH) && !TestDestroy()) {
 196                 CHashingEvent evt(MULE_EVT_AICH_HASHING, knownfile.release(), m_owner);
 197
 198                 wxPostEvent(wxTheApp, evt);
 199         } else if (!TestDestroy()) {
 200                 CHashingEvent evt(MULE_EVT_HASHING, knownfile.release(), m_owner);
 201
 202                 wxPostEvent(wxTheApp, evt);
 203         }
 204 }
 205
 206
 207 bool CHashingTask::CreateNextPartHash(CFileAutoClose& file, uint16 part, CKnownFile* owner, EHashes toHash)
 208 {
 209         wxCHECK_MSG(!file.Eof(), false, wxT("Unexpected EOF in CreateNextPartHash"));
 210
 211         const uint64 offset = part * PARTSIZE;
 212         // We'll read at most PARTSIZE bytes per cycle
 213         const uint64 partLength = owner->GetPartSize(part);
 214
 215         CMD4Hash hash;
 216         CMD4Hash* md4Hash = ((toHash & EH_MD4) ? &hash : NULL);
 217         CAICHHashTree* aichHash = NULL;
 218
 219         // Setup for AICH hashing
 220         if (toHash & EH_AICH) {
 221                 aichHash = owner->GetAICHHashset()->m_pHashTree.FindHash(offset, partLength);
 222         }
 223
 224         owner->CreateHashFromFile(file, offset, partLength, md4Hash, aichHash);
 225
 226         if (toHash & EH_MD4) {
 227                 // Store the md4 hash
 228                 owner->m_hashlist.push_back(hash);
 229
 230                 // This is because of the ed2k implementation for parts. A 2 * PARTSIZE
 231                 // file i.e. will have 3 parts (see CKnownFile::SetFileSize for comments).
 232                 // So we have to create the hash for the 0-size data, which will be the default
 233                 // md4 hash for null data: 31D6CFE0D16AE931B73C59D7E0C089C0
 234                 if ((partLength == PARTSIZE) && file.Eof()) {
 235                         owner->m_hashlist.push_back(CMD4Hash(g_emptyMD4Hash));
 236                 }
 237         }
 238
 239         return true;
 240 }
 241
 242
 243 void CHashingTask::OnLastTask()
 244 {
 245         if (GetType() == wxT("Hashing")) {
 246                 // To prevent rehashing in case of crashes, we
 247                 // explicity save the list of hashed files here.
 248                 theApp->knownfiles->Save();
 249
 250                 // Make sure the AICH-hashes are up to date.
 251                 CThreadScheduler::AddTask(new CAICHSyncTask());
 252         }
 253 }
 254
 255
 256 ////////////////////////////////////////////////////////////
 257 // CAICHSyncTask
 258
 259 CAICHSyncTask::CAICHSyncTask()
 260         : CThreadTask(wxT("AICH Syncronizing"), wxEmptyString, ETP_Low)
 261 {
 262 }
 263
 264
 265 void CAICHSyncTask::Entry()
 266 {
 267         ConvertToKnown2ToKnown264();
 268
 269         AddDebugLogLineM( false, logAICHThread, wxT("Syncronization thread started.") );
 270
 271         // We collect all masterhashs which we find in the known2.met and store them in a list
 272         std::list<CAICHHash> hashlist;
 273         const CPath fullpath = CPath(theApp->ConfigDir + KNOWN2_MET_FILENAME);
 274
 275         CFile file;
 276         if (!file.Open(fullpath, (fullpath.FileExists() ? CFile::read_write : CFile::write))) {
 277                 AddDebugLogLineM( true, logAICHThread, wxT("Error, failed to open 'known2_64.met' file!") );
 278                 return;
 279         }
 280
 281         uint32 nLastVerifiedPos = 0;
 282         try {
 283                 if (file.Eof()) {
 284                         file.WriteUInt8(KNOWN2_MET_VERSION);
 285                 } else {
 286                         if (file.ReadUInt8() != KNOWN2_MET_VERSION) {
 287                                 throw CEOFException(wxT("Invalid met-file header found, removing file."));
 288                         }
 289
 290                         uint64 nExistingSize = file.GetLength();
 291                         while (file.GetPosition() < nExistingSize) {
 292                                 // Read the next hash
 293                                 hashlist.push_back(CAICHHash(&file));
 294
 295                                 uint32 nHashCount = file.ReadUInt32();
 296                                 if (file.GetPosition() + nHashCount * CAICHHash::GetHashSize() > nExistingSize){
 297                                         throw CEOFException(wxT("Hashlist ends past end of file."));
 298                                 }
 299
 300                                 // skip the rest of this hashset
 301                                 nLastVerifiedPos = file.Seek(nHashCount * HASHSIZE, wxFromCurrent);
 302                         }
 303                 }
 304         } catch (const CEOFException&) {
 305                 AddDebugLogLineM(true, logAICHThread, wxT("Hashlist corrupted, truncating file."));
 306                 file.SetLength(nLastVerifiedPos);
 307         } catch (const CIOFailureException& e) {
 308                 AddDebugLogLineM(true, logAICHThread, wxT("IO failure while reading hashlist (Aborting): ") + e.what());
 309
 310                 return;
 311         }
 312
 313         AddDebugLogLineM( false, logAICHThread, wxT("Masterhashes of known files have been loaded.") );
 314
 315         // Now we check that all files which are in the sharedfilelist have a
 316         // corresponding hash in our list. Those how don't are queued for hashing.
 317         theApp->sharedfiles->CheckAICHHashes(hashlist);
 318 }
 319
 320
 321 bool CAICHSyncTask::ConvertToKnown2ToKnown264()
 322 {
 323         // converting known2.met to known2_64.met to support large files
 324         // changing hashcount from uint16 to uint32
 325
 326         const CPath oldfullpath = CPath(theApp->ConfigDir + OLD_KNOWN2_MET_FILENAME);
 327         const CPath newfullpath = CPath(theApp->ConfigDir + KNOWN2_MET_FILENAME);
 328
 329         if (newfullpath.FileExists() || !oldfullpath.FileExists()) {
 330                 // In this case, there is nothing that we need to do.
 331                 return false;
 332         }
 333
 334         CFile oldfile;
 335         CFile newfile;
 336
 337         if (!oldfile.Open(oldfullpath, CFile::read)) {
 338                 AddDebugLogLineM(true, logAICHThread, wxT("Failed to open 'known2.met' file."));
 339
 340                 // else -> known2.met also doesn't exists, so nothing to convert
 341                 return false;
 342         }
 343
 344
 345         if (!newfile.Open(newfullpath, CFile::write_excl)) {
 346                 AddDebugLogLineM(true, logAICHThread, wxT("Failed to create 'known2_64.met' file."));
 347
 348                 return false;
 349         }
 350
 351         AddLogLineM(false, CFormat(_("Converting old AICH hashsets in '%s' to 64b in '%s'."))
 352                         % OLD_KNOWN2_MET_FILENAME % KNOWN2_MET_FILENAME);
 353
 354         try {
 355                 newfile.WriteUInt8(KNOWN2_MET_VERSION);
 356
 357                 while (newfile.GetPosition() < oldfile.GetLength()) {
 358                         CAICHHash aichHash(&oldfile);
 359                         uint32 nHashCount = oldfile.ReadUInt16();
 360
 361                         CScopedArray<byte> buffer(nHashCount * CAICHHash::GetHashSize());
 362
 363                         oldfile.Read(buffer.get(), nHashCount * CAICHHash::GetHashSize());
 364                         newfile.Write(aichHash.GetRawHash(), CAICHHash::GetHashSize());
 365                         newfile.WriteUInt32(nHashCount);
 366                         newfile.Write(buffer.get(), nHashCount * CAICHHash::GetHashSize());
 367                 }
 368                 newfile.Flush();
 369         } catch (const CEOFException& e) {
 370                 AddDebugLogLineM(true, logAICHThread, wxT("Error reading old 'known2.met' file.") + e.what());
 371                 return false;
 372         } catch (const CIOFailureException& e) {
 373                 AddDebugLogLineM(true, logAICHThread, wxT("IO error while converting 'known2.met' file: ") + e.what());
 374                 return false;
 375         }
 376
 377         // FIXME LARGE FILES (uncomment)
 378         //DeleteFile(oldfullpath);
 379
 380         return true;
 381 }
 382
 383
 384
 385 ////////////////////////////////////////////////////////////
 386 // CCompletionTask
 387
 388
 389 CCompletionTask::CCompletionTask(const CPartFile* file)
 390         // GetPrintable is used to improve the readability of the log.
 391         : CThreadTask(wxT("Completing"), file->GetFullName().GetPrintable(), ETP_High),
 392           m_filename(file->GetFileName()),
 393           m_metPath(file->GetFullName()),
 394           m_category(file->GetCategory()),
 395           m_owner(file),
 396           m_error(false)
 397 {
 398         wxASSERT(m_filename.IsOk());
 399         wxASSERT(m_metPath.IsOk());
 400         wxASSERT(m_owner);
 401 }
 402
 403
 404 void CCompletionTask::Entry()
 405 {
 406         CPath targetPath;
 407
 408         {
 409 #ifndef AMULE_DAEMON
 410                 // Prevent the preference values from changing underneeth us.
 411                 wxMutexGuiLocker guiLock;
 412 #else
 413                 //#warning Thread-safety needed
 414 #endif
 415
 416                 targetPath = theApp->glob_prefs->GetCategory(m_category)->path;
 417                 if (!targetPath.DirExists()) {
 418                         targetPath = thePrefs::GetIncomingDir();
 419                 }
 420         }
 421
 422         CPath dstName = m_filename.Cleanup(true, !PlatformSpecific::CanFSHandleSpecialChars(targetPath));
 423
 424         // Avoid empty filenames ...
 425         if (!dstName.IsOk()) {
 426                 dstName = CPath(wxT("Unknown"));
 427         }
 428
 429         if (m_filename != dstName) {
 430                 AddDebugLogLineM(true, logPartFile, CFormat(_("WARNING: The filename '%s' is invalid and has been renamed to '%s'."))
 431                         % m_filename % dstName);
 432         }
 433
 434         // Avoid saving to an already existing filename
 435         CPath newName = targetPath.JoinPaths(dstName);
 436         for (unsigned count = 0; newName.FileExists(); ++count) {
 437                 wxString postfix = wxString::Format(wxT("(%u)"), count);
 438
 439                 newName = targetPath.JoinPaths(dstName.AddPostfix(postfix));
 440         }
 441
 442         if (newName != targetPath.JoinPaths(dstName)) {
 443                 AddDebugLogLineM(true, logPartFile, CFormat(_("WARNING: The file '%s' already exists, new file renamed to '%s'."))
 444                         % dstName % newName.GetFullName());
 445         }
 446
 447         // Move will handle dirs on the same partition, otherwise copy is needed.
 448         CPath partfilename = m_metPath.RemoveExt();
 449         if (!CPath::RenameFile(partfilename, newName)) {
 450                 if (!CPath::CloneFile(partfilename, newName, true)) {
 451                         m_error = true;
 452                         return;
 453                 }
 454
 455                 if (!CPath::RemoveFile(partfilename)) {
 456                         AddDebugLogLineM(true, logPartFile, CFormat(_("WARNING: Could not remove original '%s' after creating backup"))
 457                                 % partfilename);
 458                 }
 459         }
 460
 461         // Removes the various other data-files
 462         const wxChar* otherMetExt[] = { wxT(""), PARTMET_BAK_EXT, wxT(".seeds"), NULL };
 463         for (size_t i = 0; otherMetExt[i]; ++i) {
 464                 CPath toRemove = m_metPath.AppendExt(otherMetExt[i]);
 465
 466                 if (toRemove.FileExists()) {
 467                         if (!CPath::RemoveFile(toRemove)) {
 468                                 AddDebugLogLineM(true, logPartFile, CFormat(_("WARNING: Failed to delete %s")) % toRemove);
 469                         }
 470                 }
 471         }
 472
 473         m_newName = newName;
 474 }
 475
 476
 477 void CCompletionTask::OnExit()
 478 {
 479         // Notify the app that the completion has finished for this file.
 480         CCompletionEvent evt(m_error, m_owner, m_newName);
 481
 482         wxPostEvent(wxTheApp, evt);
 483 }
 484
 485
 486
 487 ////////////////////////////////////////////////////////////
 488 // CAllocateFileTask
 489
 490 #ifdef HAVE_FALLOCATE
 491 #       define _GNU_SOURCE
 492 #       ifdef HAVE_FCNTL_H
 493 #               include <fcntl.h>
 494 #       endif
 495 #       include <linux/falloc.h>
 496 #elif defined HAVE_SYS_FALLOCATE
 497 #       include <sys/syscall.h>
 498 #       include <sys/types.h>
 499 #       include <unistd.h>
 500 #elif defined HAVE_POSIX_FALLOCATE
 501 #       define _XOPEN_SOURCE 600
 502 #       include <stdlib.h>
 503 #       ifdef HAVE_FCNTL_H
 504 #               include <fcntl.h>
 505 #       endif
 506 #endif
 507 #include <stdlib.h>
 508 #include <errno.h>
 509
 510 CAllocateFileTask::CAllocateFileTask(CPartFile *file, bool pause)
 511         // GetPrintable is used to improve the readability of the log.
 512         : CThreadTask(wxT("Allocating"), file->GetFullName().RemoveExt().GetPrintable(), ETP_High),
 513           m_file(file), m_pause(pause), m_result(ENOSYS)
 514 {
 515         wxASSERT(file != NULL);
 516 }
 517
 518 void CAllocateFileTask::Entry()
 519 {
 520         if (m_file->GetFileSize() == 0) {
 521                 m_result = 0;
 522                 return;
 523         }
 524
 525         uint64_t minFree = thePrefs::IsCheckDiskspaceEnabled() ? thePrefs::GetMinFreeDiskSpace() : 0;
 526         int64_t freeSpace = CPath::GetFreeSpaceAt(thePrefs::GetTempDir());
 527
 528         // Don't even try to allocate, if there's no space to complete the operation.
 529         if (freeSpace != wxInvalidOffset) {
 530                 if ((uint64_t)freeSpace < m_file->GetFileSize() + minFree) {
 531                         m_result = ENOSPC;
 532                         return;
 533                 }
 534         }
 535
 536         CFile file;
 537         file.Open(m_file->GetFullName().RemoveExt(), CFile::read_write);
 538
 539 #ifdef __WXMSW__
 540         try {
 541                 // File is already created as non-sparse, so we only need to set the length.
 542                 // This will fail to allocate the file e.g. under wine on linux/ext3,
 543                 // but works with NTFS and FAT32.
 544                 file.Seek(m_file->GetFileSize() - 1, wxFromStart);
 545                 file.WriteUInt8(0);
 546                 file.Close();
 547                 m_result = 0;
 548         } catch (const CSafeIOException&) {
 549                 m_result = errno;
 550         }
 551 #else
 552         // Use kernel level routines if possible
 553 #  ifdef HAVE_FALLOCATE
 554         m_result = fallocate(file.fd(), 0, 0, m_file->GetFileSize());
 555 #  elif defined HAVE_SYS_FALLOCATE
 556         m_result = syscall(SYS_fallocate, file.fd(), 0, (loff_t)0, (loff_t)m_file->GetFileSize());
 557         if (m_result == -1) {
 558                 m_result = errno;
 559         }
 560 #  elif defined HAVE_POSIX_FALLOCATE
 561         // otherwise use glibc implementation, if available
 562         m_result = posix_fallocate(file.fd(), 0, m_file->GetFileSize());
 563 #  endif
 564
 565         if (m_result != 0 && m_result != ENOSPC) {
 566                 // If everything else fails, use slow-and-dirty method of allocating the file: write the whole file with zeroes.
 567 #  define BLOCK_SIZE    1048576         /* Write 1 MB blocks */
 568                 void *zero = calloc(1, BLOCK_SIZE);
 569                 if (zero != NULL) {
 570                         try {
 571                                 uint64_t size = m_file->GetFileSize();
 572                                 for (; size >= BLOCK_SIZE; size -= BLOCK_SIZE) {
 573                                         file.Write(zero, BLOCK_SIZE);
 574                                 }
 575                                 if (size > 0) {
 576                                         file.Write(zero, size);
 577                                 }
 578                                 file.Close();
 579                                 m_result = 0;
 580                         } catch (const CSafeIOException&) {
 581                                 m_result = errno;
 582                         }
 583                         free(zero);
 584                 } else {
 585                         m_result = ENOMEM;
 586                 }
 587         }
 588
 589 #endif
 590         if (file.IsOpened()) {
 591                 file.Close();
 592         }
 593 }
 594
 595 void CAllocateFileTask::OnExit()
 596 {
 597         // Notify the app that the preallocation has finished for this file.
 598         CAllocFinishedEvent evt(m_file, m_pause, m_result);
 599
 600         wxPostEvent(wxTheApp, evt);
 601 }
 602
 603
 604
 605 ////////////////////////////////////////////////////////////
 606 // CHashingEvent
 607
 608 DEFINE_LOCAL_EVENT_TYPE(MULE_EVT_HASHING)
 609 DEFINE_LOCAL_EVENT_TYPE(MULE_EVT_AICH_HASHING)
 610
 611 CHashingEvent::CHashingEvent(wxEventType type, CKnownFile* result, const CKnownFile* owner)
 612         : wxEvent(-1, type),
 613           m_owner(owner),
 614           m_result(result)
 615 {
 616 }
 617
 618
 619 wxEvent* CHashingEvent::Clone() const
 620 {
 621         return new CHashingEvent(GetEventType(), m_result, m_owner);
 622 }
 623
 624
 625 const CKnownFile* CHashingEvent::GetOwner() const
 626 {
 627         return m_owner;
 628 }
 629
 630
 631 CKnownFile* CHashingEvent::GetResult() const
 632 {
 633         return m_result;
 634 }
 635
 636
 637
 638
 639 ////////////////////////////////////////////////////////////
 640 // CCompletionEvent
 641
 642 DEFINE_LOCAL_EVENT_TYPE(MULE_EVT_FILE_COMPLETED)
 643
 644
 645 CCompletionEvent::CCompletionEvent(bool errorOccured, const CPartFile* owner, const CPath& fullPath)
 646         : wxEvent(-1, MULE_EVT_FILE_COMPLETED),
 647           m_fullPath(fullPath),
 648           m_owner(owner),
 649           m_error(errorOccured)
 650 {
 651 }
 652
 653
 654 wxEvent* CCompletionEvent::Clone() const
 655 {
 656         return new CCompletionEvent(m_error, m_owner, m_fullPath);
 657 }
 658
 659
 660 bool CCompletionEvent::ErrorOccured() const
 661 {
 662         return m_error;
 663 }
 664
 665
 666 const CPartFile* CCompletionEvent::GetOwner() const
 667 {
 668         return m_owner;
 669 }
 670
 671
 672 const CPath& CCompletionEvent::GetFullPath() const
 673 {
 674         return m_fullPath;
 675 }
 676
 677
 678 ////////////////////////////////////////////////////////////
 679 // CAllocFinishedEvent
 680
 681 DEFINE_LOCAL_EVENT_TYPE(MULE_EVT_ALLOC_FINISHED)
 682
 683 wxEvent *CAllocFinishedEvent::Clone() const
 684 {
 685         return new CAllocFinishedEvent(m_file, m_pause, m_result);
 686 }
 687
 688 // File_checked_for_headers