src/ThreadTasks.cpp

   1 //
   2 // This file is part of the aMule Project.
   3 //
   4 // Copyright (c) 2006-2011 Mikkel Schubert ( xaignar@amule.org / http:://www.amule.org )
   5 // Copyright (c) 2003-2011 aMule Team ( admin@amule.org / http://www.amule.org )
   6 // Copyright (c) 2002-2011 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)LogLine{C,N}
  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 #include "config.h"
  40
  41 //! This hash represents the value for an empty MD4 hashing
  42 const uint8_t g_emptyMD4Hash[16] = {
  43         0x31, 0xD6, 0xCF, 0xE0, 0xD1, 0x6A, 0xE9, 0x31,
  44         0xB7, 0x3C, 0x59, 0xD7, 0xE0, 0xC0, 0x89, 0xC0 };
  45
  46
  47 ////////////////////////////////////////////////////////////
  48 // CHashingTask
  49
  50 CHashingTask::CHashingTask(const CPath& path, const CPath& filename, const CPartFile* part)
  51         // GetPrintable is used to improve the readability of the log.
  52         : CThreadTask(wxT("Hashing"), path.JoinPaths(filename).GetPrintable(), (part ? ETP_High : ETP_Normal)),
  53           m_path(path),
  54           m_filename(filename),
  55           m_toHash((EHashes)(EH_MD4 | EH_AICH)),
  56           m_owner(part)
  57 {
  58         // We can only create the AICH hashset if the file is a knownfile or
  59         // if the partfile is complete, since the MD4 hashset is checked first,
  60         // so that the AICH hashset only gets assigned if the MD4 hashset
  61         // matches what we expected. Due to the rareity of post-completion
  62         // corruptions, this gives us a nice speedup in most cases.
  63         if (part && !part->GetGapList().empty()) {
  64                 m_toHash = EH_MD4;
  65         }
  66 }
  67
  68
  69 CHashingTask::CHashingTask(const CKnownFile* toAICHHash)
  70         // GetPrintable is used to improve the readability of the log.
  71         : CThreadTask(wxT("AICH Hashing"), toAICHHash->GetFilePath().JoinPaths(toAICHHash->GetFileName()).GetPrintable(), ETP_Low),
  72           m_path(toAICHHash->GetFilePath()),
  73           m_filename(toAICHHash->GetFileName()),
  74           m_toHash(EH_AICH),
  75           m_owner(toAICHHash)
  76 {
  77 }
  78
  79
  80 void CHashingTask::Entry()
  81 {
  82         CFileAutoClose file;
  83
  84         CPath fullPath = m_path.JoinPaths(m_filename);
  85         if (!file.Open(fullPath, CFile::read)) {
  86                 AddDebugLogLineC(logHasher,
  87                         CFormat(wxT("Warning, failed to open file, skipping: %s")) % fullPath);
  88                 return;
  89         }
  90
  91         uint64 fileLength = 0;
  92         try {
  93                 fileLength = file.GetLength();
  94         } catch (const CIOFailureException&) {
  95                 AddDebugLogLineC(logHasher,
  96                         CFormat(wxT("Warning, failed to retrieve file-length, skipping: %s")) % fullPath);
  97                 return;
  98         }
  99
 100         if (fileLength > MAX_FILE_SIZE) {
 101                 AddDebugLogLineC(logHasher,
 102                         CFormat(wxT("Warning, file is larger than supported size, skipping: %s")) % fullPath);
 103                 return;
 104         } else if (fileLength == 0) {
 105                 if (m_owner) {
 106                         // It makes no sense to try to hash empty partfiles ...
 107                         wxFAIL;
 108                 } else {
 109                         // Zero-size partfiles should be hashed, but not zero-sized shared-files.
 110                         AddDebugLogLineC(logHasher,
 111                                 CFormat(wxT("Warning, 0-size file, skipping: %s")) % fullPath);
 112                 }
 113
 114                 return;
 115         }
 116
 117         // For thread-safety, results are passed via a temporary file object.
 118         CScopedPtr<CKnownFile> knownfile;
 119         knownfile->m_filePath = m_path;
 120         knownfile->SetFileName(m_filename);
 121         knownfile->SetFileSize(fileLength);
 122         knownfile->m_lastDateChanged = CPath::GetModificationTime(fullPath);
 123         knownfile->m_AvailPartFrequency.insert(
 124                 knownfile->m_AvailPartFrequency.begin(),
 125                 knownfile->GetPartCount(), 0);
 126
 127         if ((m_toHash & EH_MD4) && (m_toHash & EH_AICH)) {
 128                 knownfile->GetAICHHashset()->FreeHashSet();
 129                 AddDebugLogLineN( logHasher, CFormat(
 130                         wxT("Starting to create MD4 and AICH hash for file: %s")) %
 131                         m_filename );
 132         } else if ((m_toHash & EH_MD4)) {
 133                 AddDebugLogLineN( logHasher, CFormat(
 134                         wxT("Starting to create MD4 hash for file: %s")) % m_filename );
 135         } else if ((m_toHash & EH_AICH)) {
 136                 knownfile->GetAICHHashset()->FreeHashSet();
 137                 AddDebugLogLineN( logHasher, CFormat(
 138                         wxT("Starting to create AICH hash for file: %s")) % m_filename );
 139         } else {
 140                 wxCHECK_RET(0, (CFormat(wxT("No hashes requested for file, skipping: %s"))
 141                         % m_filename).GetString());
 142         }
 143
 144         // This loops creates the part-hashes, loop-de-loop.
 145         try {
 146                 for (uint16 part = 0; part < knownfile->GetPartCount() && !TestDestroy(); part++) {
 147                         SetHashingProgress(part + 1);
 148                         if (CreateNextPartHash(file, part, knownfile.get(), m_toHash) == false) {
 149                                 AddDebugLogLineC(logHasher,
 150                                         CFormat(wxT("Error while hashing file, skipping: %s"))
 151                                                 % m_filename);
 152
 153                                 SetHashingProgress(0);
 154                                 return;
 155                         }
 156                 }
 157         } catch (const CSafeIOException& e) {
 158                 AddDebugLogLineC(logHasher, wxT("IO exception while hashing file: ") + e.what());
 159                 SetHashingProgress(0);
 160                 return;
 161         }
 162         SetHashingProgress(0);
 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                                 AddDebugLogLineC( logHasher,
 189                                         CFormat(wxT("Warning, failed to save AICH hashset for file: %s"))
 190                                                 % m_filename );
 191                         }
 192                         // delete hashset now to free memory
 193                         AICHHashSet->FreeHashSet();
 194                 }
 195         }
 196
 197         if ((m_toHash == EH_AICH) && !TestDestroy()) {
 198                 CHashingEvent evt(MULE_EVT_AICH_HASHING, knownfile.release(), m_owner);
 199
 200                 wxPostEvent(wxTheApp, evt);
 201         } else if (!TestDestroy()) {
 202                 CHashingEvent evt(MULE_EVT_HASHING, knownfile.release(), m_owner);
 203
 204                 wxPostEvent(wxTheApp, evt);
 205         }
 206 }
 207
 208
 209 void CHashingTask::SetHashingProgress(uint16 part)
 210 {
 211         if (m_owner) {
 212                 m_owner->SetHashingProgress(part);
 213         }
 214 }
 215
 216
 217 bool CHashingTask::CreateNextPartHash(CFileAutoClose& file, uint16 part, CKnownFile* owner, EHashes toHash)
 218 {
 219         wxCHECK_MSG(!file.Eof(), false, wxT("Unexpected EOF in CreateNextPartHash"));
 220
 221         const uint64 offset = part * PARTSIZE;
 222         // We'll read at most PARTSIZE bytes per cycle
 223         const uint64 partLength = owner->GetPartSize(part);
 224
 225         CMD4Hash hash;
 226         CMD4Hash* md4Hash = ((toHash & EH_MD4) ? &hash : NULL);
 227         CAICHHashTree* aichHash = NULL;
 228
 229         // Setup for AICH hashing
 230         if (toHash & EH_AICH) {
 231                 aichHash = owner->GetAICHHashset()->m_pHashTree.FindHash(offset, partLength);
 232         }
 233
 234         owner->CreateHashFromFile(file, offset, partLength, md4Hash, aichHash);
 235
 236         if (toHash & EH_MD4) {
 237                 // Store the md4 hash
 238                 owner->m_hashlist.push_back(hash);
 239
 240                 // This is because of the ed2k implementation for parts. A 2 * PARTSIZE
 241                 // file i.e. will have 3 parts (see CKnownFile::SetFileSize for comments).
 242                 // So we have to create the hash for the 0-size data, which will be the default
 243                 // md4 hash for null data: 31D6CFE0D16AE931B73C59D7E0C089C0
 244                 if ((partLength == PARTSIZE) && file.Eof()) {
 245                         owner->m_hashlist.push_back(CMD4Hash(g_emptyMD4Hash));
 246                 }
 247         }
 248
 249         return true;
 250 }
 251
 252
 253 void CHashingTask::OnLastTask()
 254 {
 255         if (GetType() == wxT("Hashing")) {
 256                 // To prevent rehashing in case of crashes, we
 257                 // explicity save the list of hashed files here.
 258                 theApp->knownfiles->Save();
 259
 260                 // Make sure the AICH-hashes are up to date.
 261                 CThreadScheduler::AddTask(new CAICHSyncTask());
 262         }
 263 }
 264
 265
 266 ////////////////////////////////////////////////////////////
 267 // CAICHSyncTask
 268
 269 CAICHSyncTask::CAICHSyncTask()
 270         : CThreadTask(wxT("AICH Syncronizing"), wxEmptyString, ETP_Low)
 271 {
 272 }
 273
 274
 275 void CAICHSyncTask::Entry()
 276 {
 277         ConvertToKnown2ToKnown264();
 278
 279         AddDebugLogLineN( logAICHThread, wxT("Syncronization thread started.") );
 280
 281         // We collect all masterhashs which we find in the known2.met and store them in a list
 282         std::list<CAICHHash> hashlist;
 283         const CPath fullpath = CPath(thePrefs::GetConfigDir() + KNOWN2_MET_FILENAME);
 284
 285         CFile file;
 286         if (!fullpath.FileExists()) {
 287                 // File does not exist. Try to create it to see if it can be created at all (and don't start hashing otherwise).
 288                 if (!file.Open(fullpath, CFile::write)) {
 289                         AddDebugLogLineC( logAICHThread, wxT("Error, failed to open 'known2_64.met' file!") );
 290                         return;
 291                 }
 292                 try {
 293                         file.WriteUInt8(KNOWN2_MET_VERSION);
 294                 } catch (const CIOFailureException& e) {
 295                         AddDebugLogLineC(logAICHThread, wxT("IO failure while creating hashlist (Aborting): ") + e.what());
 296                         return;
 297                 }
 298         } else {
 299                 if (!file.Open(fullpath, CFile::read)) {
 300                         AddDebugLogLineC( logAICHThread, wxT("Error, failed to open 'known2_64.met' file!") );
 301                         return;
 302                 }
 303
 304                 uint32 nLastVerifiedPos = 0;
 305                 try {
 306                         if (file.ReadUInt8() != KNOWN2_MET_VERSION) {
 307                                 throw CEOFException(wxT("Invalid met-file header found, removing file."));
 308                         }
 309
 310                         uint64 nExistingSize = file.GetLength();
 311                         while (file.GetPosition() < nExistingSize) {
 312                                 // Read the next hash
 313                                 hashlist.push_back(CAICHHash(&file));
 314
 315                                 uint32 nHashCount = file.ReadUInt32();
 316                                 if (file.GetPosition() + nHashCount * CAICHHash::GetHashSize() > nExistingSize){
 317                                         throw CEOFException(wxT("Hashlist ends past end of file."));
 318                                 }
 319
 320                                 // skip the rest of this hashset
 321                                 nLastVerifiedPos = file.Seek(nHashCount * HASHSIZE, wxFromCurrent);
 322                         }
 323                 } catch (const CEOFException&) {
 324                         AddDebugLogLineC(logAICHThread, wxT("Hashlist corrupted, truncating file."));
 325                         file.Close();
 326                         file.Reopen(CFile::read_write);
 327                         file.SetLength(nLastVerifiedPos);
 328                 } catch (const CIOFailureException& e) {
 329                         AddDebugLogLineC(logAICHThread, wxT("IO failure while reading hashlist (Aborting): ") + e.what());
 330
 331                         return;
 332                 }
 333
 334                 AddDebugLogLineN( logAICHThread, wxT("Masterhashes of known files have been loaded.") );
 335         }
 336
 337         // Now we check that all files which are in the sharedfilelist have a
 338         // corresponding hash in our list. Those how don't are queued for hashing.
 339         theApp->sharedfiles->CheckAICHHashes(hashlist);
 340 }
 341
 342
 343 bool CAICHSyncTask::ConvertToKnown2ToKnown264()
 344 {
 345         // converting known2.met to known2_64.met to support large files
 346         // changing hashcount from uint16 to uint32
 347
 348         const CPath oldfullpath = CPath(thePrefs::GetConfigDir() + OLD_KNOWN2_MET_FILENAME);
 349         const CPath newfullpath = CPath(thePrefs::GetConfigDir() + KNOWN2_MET_FILENAME);
 350
 351         if (newfullpath.FileExists() || !oldfullpath.FileExists()) {
 352                 // In this case, there is nothing that we need to do.
 353                 return false;
 354         }
 355
 356         CFile oldfile;
 357         CFile newfile;
 358
 359         if (!oldfile.Open(oldfullpath, CFile::read)) {
 360                 AddDebugLogLineC(logAICHThread, wxT("Failed to open 'known2.met' file."));
 361
 362                 // else -> known2.met also doesn't exists, so nothing to convert
 363                 return false;
 364         }
 365
 366
 367         if (!newfile.Open(newfullpath, CFile::write_excl)) {
 368                 AddDebugLogLineC(logAICHThread, wxT("Failed to create 'known2_64.met' file."));
 369
 370                 return false;
 371         }
 372
 373         AddLogLineN(CFormat(_("Converting old AICH hashsets in '%s' to 64b in '%s'."))
 374                         % OLD_KNOWN2_MET_FILENAME % KNOWN2_MET_FILENAME);
 375
 376         try {
 377                 newfile.WriteUInt8(KNOWN2_MET_VERSION);
 378
 379                 while (newfile.GetPosition() < oldfile.GetLength()) {
 380                         CAICHHash aichHash(&oldfile);
 381                         uint32 nHashCount = oldfile.ReadUInt16();
 382
 383                         CScopedArray<uint8_t> buffer(nHashCount * CAICHHash::GetHashSize());
 384
 385                         oldfile.Read(buffer.get(), nHashCount * CAICHHash::GetHashSize());
 386                         newfile.Write(aichHash.GetRawHash(), CAICHHash::GetHashSize());
 387                         newfile.WriteUInt32(nHashCount);
 388                         newfile.Write(buffer.get(), nHashCount * CAICHHash::GetHashSize());
 389                 }
 390                 newfile.Flush();
 391         } catch (const CEOFException& e) {
 392                 AddDebugLogLineC(logAICHThread, wxT("Error reading old 'known2.met' file.") + e.what());
 393                 return false;
 394         } catch (const CIOFailureException& e) {
 395                 AddDebugLogLineC(logAICHThread, wxT("IO error while converting 'known2.met' file: ") + e.what());
 396                 return false;
 397         }
 398
 399         // FIXME LARGE FILES (uncomment)
 400         //DeleteFile(oldfullpath);
 401
 402         return true;
 403 }
 404
 405
 406
 407 ////////////////////////////////////////////////////////////
 408 // CCompletionTask
 409
 410
 411 CCompletionTask::CCompletionTask(const CPartFile* file)
 412         // GetPrintable is used to improve the readability of the log.
 413         : CThreadTask(wxT("Completing"), file->GetFullName().GetPrintable(), ETP_High),
 414           m_filename(file->GetFileName()),
 415           m_metPath(file->GetFullName()),
 416           m_category(file->GetCategory()),
 417           m_owner(file),
 418           m_error(false)
 419 {
 420         wxASSERT(m_filename.IsOk());
 421         wxASSERT(m_metPath.IsOk());
 422         wxASSERT(m_owner);
 423 }
 424
 425
 426 void CCompletionTask::Entry()
 427 {
 428         CPath targetPath;
 429
 430         {
 431 #ifndef AMULE_DAEMON
 432                 // Prevent the preference values from changing underneeth us.
 433                 wxMutexGuiLocker guiLock;
 434 #else
 435                 //#warning Thread-safety needed
 436 #endif
 437
 438                 targetPath = theApp->glob_prefs->GetCategory(m_category)->path;
 439                 if (!targetPath.DirExists()) {
 440                         targetPath = thePrefs::GetIncomingDir();
 441                 }
 442         }
 443
 444         CPath dstName = m_filename.Cleanup(true, !PlatformSpecific::CanFSHandleSpecialChars(targetPath));
 445
 446         // Avoid empty filenames ...
 447         if (!dstName.IsOk()) {
 448                 dstName = CPath(wxT("Unknown"));
 449         }
 450
 451         if (m_filename != dstName) {
 452                 AddLogLineC(CFormat(_("WARNING: The filename '%s' is invalid and has been renamed to '%s'.")) % m_filename % dstName);
 453         }
 454
 455         // Avoid saving to an already existing filename
 456         CPath newName = targetPath.JoinPaths(dstName);
 457         for (unsigned count = 0; newName.FileExists(); ++count) {
 458                 wxString postfix = CFormat(wxT("(%u)")) % count;
 459
 460                 newName = targetPath.JoinPaths(dstName.AddPostfix(postfix));
 461         }
 462
 463         if (newName != targetPath.JoinPaths(dstName)) {
 464                 AddLogLineC(CFormat(_("WARNING: The file '%s' already exists, new file renamed to '%s'.")) % dstName % newName.GetFullName());
 465         }
 466
 467         // Move will handle dirs on the same partition, otherwise copy is needed.
 468         CPath partfilename = m_metPath.RemoveExt();
 469         if (!CPath::RenameFile(partfilename, newName)) {
 470                 if (!CPath::CloneFile(partfilename, newName, true)) {
 471                         m_error = true;
 472                         return;
 473                 }
 474
 475                 if (!CPath::RemoveFile(partfilename)) {
 476                         AddDebugLogLineC(logPartFile, CFormat(wxT("WARNING: Could not remove original '%s' after creating backup")) % partfilename);
 477                 }
 478         }
 479
 480         // Removes the various other data-files
 481         const wxChar* otherMetExt[] = { wxT(""), PARTMET_BAK_EXT, wxT(".seeds"), NULL };
 482         for (size_t i = 0; otherMetExt[i]; ++i) {
 483                 CPath toRemove = m_metPath.AppendExt(otherMetExt[i]);
 484
 485                 if (toRemove.FileExists()) {
 486                         if (!CPath::RemoveFile(toRemove)) {
 487                                 AddDebugLogLineC(logPartFile, CFormat(wxT("WARNING: Failed to delete %s")) % toRemove);
 488                         }
 489                 }
 490         }
 491
 492         m_newName = newName;
 493 }
 494
 495
 496 void CCompletionTask::OnExit()
 497 {
 498         // Notify the app that the completion has finished for this file.
 499         CCompletionEvent evt(m_error, m_owner, m_newName);
 500
 501         wxPostEvent(wxTheApp, evt);
 502 }
 503
 504
 505
 506 ////////////////////////////////////////////////////////////
 507 // CAllocateFileTask
 508
 509 #ifdef HAVE_FALLOCATE
 510 #       ifndef _GNU_SOURCE
 511 #               define _GNU_SOURCE
 512 #       endif
 513 #       ifdef HAVE_FCNTL_H
 514 #               include <fcntl.h>
 515 #       endif
 516 #       include <linux/falloc.h>
 517 #elif defined HAVE_SYS_FALLOCATE
 518 #       include <sys/syscall.h>
 519 #       include <sys/types.h>
 520 #       include <unistd.h>
 521 #elif defined HAVE_POSIX_FALLOCATE
 522 #       define _XOPEN_SOURCE 600
 523 #       include <stdlib.h>
 524 #       ifdef HAVE_FCNTL_H
 525 #               include <fcntl.h>
 526 #       endif
 527 #endif
 528 #include <stdlib.h>
 529 #include <errno.h>
 530
 531 CAllocateFileTask::CAllocateFileTask(CPartFile *file, bool pause)
 532         // GetPrintable is used to improve the readability of the log.
 533         : CThreadTask(wxT("Allocating"), file->GetFullName().RemoveExt().GetPrintable(), ETP_High),
 534           m_file(file), m_pause(pause), m_result(ENOSYS)
 535 {
 536         wxASSERT(file != NULL);
 537 }
 538
 539 void CAllocateFileTask::Entry()
 540 {
 541         if (m_file->GetFileSize() == 0) {
 542                 m_result = 0;
 543                 return;
 544         }
 545
 546         uint64_t minFree = thePrefs::IsCheckDiskspaceEnabled() ? thePrefs::GetMinFreeDiskSpace() : 0;
 547         int64_t freeSpace = CPath::GetFreeSpaceAt(thePrefs::GetTempDir());
 548
 549         // Don't even try to allocate, if there's no space to complete the operation.
 550         if (freeSpace != wxInvalidOffset) {
 551                 if ((uint64_t)freeSpace < m_file->GetFileSize() + minFree) {
 552                         m_result = ENOSPC;
 553                         return;
 554                 }
 555         }
 556
 557         CFile file;
 558         file.Open(m_file->GetFullName().RemoveExt(), CFile::read_write);
 559
 560 #ifdef __WINDOWS__
 561         try {
 562                 // File is already created as non-sparse, so we only need to set the length.
 563                 // This will fail to allocate the file e.g. under wine on linux/ext3,
 564                 // but works with NTFS and FAT32.
 565                 file.Seek(m_file->GetFileSize() - 1, wxFromStart);
 566                 file.WriteUInt8(0);
 567                 file.Close();
 568                 m_result = 0;
 569         } catch (const CSafeIOException&) {
 570                 m_result = errno;
 571         }
 572 #else
 573         // Use kernel level routines if possible
 574 #  ifdef HAVE_FALLOCATE
 575         m_result = fallocate(file.fd(), 0, 0, m_file->GetFileSize());
 576 #  elif defined HAVE_SYS_FALLOCATE
 577         m_result = syscall(SYS_fallocate, file.fd(), 0, (loff_t)0, (loff_t)m_file->GetFileSize());
 578         if (m_result == -1) {
 579                 m_result = errno;
 580         }
 581 #  elif defined HAVE_POSIX_FALLOCATE
 582         // otherwise use glibc implementation, if available
 583         m_result = posix_fallocate(file.fd(), 0, m_file->GetFileSize());
 584 #  endif
 585
 586         if (m_result != 0 && m_result != ENOSPC) {
 587                 // If everything else fails, use slow-and-dirty method of allocating the file: write the whole file with zeroes.
 588 #  define BLOCK_SIZE    1048576         /* Write 1 MB blocks */
 589                 void *zero = calloc(1, BLOCK_SIZE);
 590                 if (zero != NULL) {
 591                         try {
 592                                 uint64_t size = m_file->GetFileSize();
 593                                 for (; size >= BLOCK_SIZE; size -= BLOCK_SIZE) {
 594                                         file.Write(zero, BLOCK_SIZE);
 595                                 }
 596                                 if (size > 0) {
 597                                         file.Write(zero, size);
 598                                 }
 599                                 file.Close();
 600                                 m_result = 0;
 601                         } catch (const CSafeIOException&) {
 602                                 m_result = errno;
 603                         }
 604                         free(zero);
 605                 } else {
 606                         m_result = ENOMEM;
 607                 }
 608         }
 609
 610 #endif
 611         if (file.IsOpened()) {
 612                 file.Close();
 613         }
 614 }
 615
 616 void CAllocateFileTask::OnExit()
 617 {
 618         // Notify the app that the preallocation has finished for this file.
 619         CAllocFinishedEvent evt(m_file, m_pause, m_result);
 620
 621         wxPostEvent(wxTheApp, evt);
 622 }
 623
 624
 625
 626 ////////////////////////////////////////////////////////////
 627 // CHashingEvent
 628
 629 DEFINE_LOCAL_EVENT_TYPE(MULE_EVT_HASHING)
 630 DEFINE_LOCAL_EVENT_TYPE(MULE_EVT_AICH_HASHING)
 631
 632 CHashingEvent::CHashingEvent(wxEventType type, CKnownFile* result, const CKnownFile* owner)
 633         : wxEvent(-1, type),
 634           m_owner(owner),
 635           m_result(result)
 636 {
 637 }
 638
 639
 640 wxEvent* CHashingEvent::Clone() const
 641 {
 642         return new CHashingEvent(GetEventType(), m_result, m_owner);
 643 }
 644
 645
 646 const CKnownFile* CHashingEvent::GetOwner() const
 647 {
 648         return m_owner;
 649 }
 650
 651
 652 CKnownFile* CHashingEvent::GetResult() const
 653 {
 654         return m_result;
 655 }
 656
 657
 658
 659
 660 ////////////////////////////////////////////////////////////
 661 // CCompletionEvent
 662
 663 DEFINE_LOCAL_EVENT_TYPE(MULE_EVT_FILE_COMPLETED)
 664
 665
 666 CCompletionEvent::CCompletionEvent(bool errorOccured, const CPartFile* owner, const CPath& fullPath)
 667         : wxEvent(-1, MULE_EVT_FILE_COMPLETED),
 668           m_fullPath(fullPath),
 669           m_owner(owner),
 670           m_error(errorOccured)
 671 {
 672 }
 673
 674
 675 wxEvent* CCompletionEvent::Clone() const
 676 {
 677         return new CCompletionEvent(m_error, m_owner, m_fullPath);
 678 }
 679
 680
 681 bool CCompletionEvent::ErrorOccured() const
 682 {
 683         return m_error;
 684 }
 685
 686
 687 const CPartFile* CCompletionEvent::GetOwner() const
 688 {
 689         return m_owner;
 690 }
 691
 692
 693 const CPath& CCompletionEvent::GetFullPath() const
 694 {
 695         return m_fullPath;
 696 }
 697
 698
 699 ////////////////////////////////////////////////////////////
 700 // CAllocFinishedEvent
 701
 702 DEFINE_LOCAL_EVENT_TYPE(MULE_EVT_ALLOC_FINISHED)
 703
 704 wxEvent *CAllocFinishedEvent::Clone() const
 705 {
 706         return new CAllocFinishedEvent(m_file, m_pause, m_result);
 707 }
 708
 709 // File_checked_for_headers