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
  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                 AddDebugLogLineC(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                 AddDebugLogLineC(logHasher,
  99                         CFormat(wxT("Warning, failed to retrieve file-length, skipping: %s")) % fullPath);
 100                 return;
 101         }
 102
 103         if (fileLength > MAX_FILE_SIZE) {
 104                 AddDebugLogLineC(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                         AddDebugLogLineC(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;
 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                 AddDebugLogLineN( logHasher, CFormat(
 133                         wxT("Starting to create MD4 and AICH hash for file: %s")) %
 134                         m_filename );
 135         } else if ((m_toHash & EH_MD4)) {
 136                 AddDebugLogLineN( logHasher, CFormat(
 137                         wxT("Starting to create MD4 hash for file: %s")) % m_filename );
 138         } else if ((m_toHash & EH_AICH)) {
 139                 knownfile->GetAICHHashset()->FreeHashSet();
 140                 AddDebugLogLineN( logHasher, CFormat(
 141                         wxT("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                                 AddDebugLogLineC(logHasher,
 153                                         CFormat(wxT("Error while hashing file, skipping: %s"))
 154                                                 % m_filename);
 155
 156                                 return;
 157                         }
 158                 }
 159         } catch (const CSafeIOException& e) {
 160                 AddDebugLogLineC(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                                 AddDebugLogLineC( 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         AddDebugLogLineN( 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 (!fullpath.FileExists()) {
 277                 // File does not exist. Try to create it to see if it can be created at all (and don't start hashing otherwise).
 278                 if (!file.Open(fullpath, CFile::write)) {
 279                         AddDebugLogLineC( logAICHThread, wxT("Error, failed to open 'known2_64.met' file!") );
 280                         return;
 281                 }
 282                 try {
 283                         file.WriteUInt8(KNOWN2_MET_VERSION);
 284                 } catch (const CIOFailureException& e) {
 285                         AddDebugLogLineC(logAICHThread, wxT("IO failure while creating hashlist (Aborting): ") + e.what());
 286                         return;
 287                 }
 288         } else {
 289                 if (!file.Open(fullpath, CFile::read)) {
 290                         AddDebugLogLineC( logAICHThread, wxT("Error, failed to open 'known2_64.met' file!") );
 291                         return;
 292                 }
 293
 294                 uint32 nLastVerifiedPos = 0;
 295                 try {
 296                         if (file.ReadUInt8() != KNOWN2_MET_VERSION) {
 297                                 throw CEOFException(wxT("Invalid met-file header found, removing file."));
 298                         }
 299
 300                         uint64 nExistingSize = file.GetLength();
 301                         while (file.GetPosition() < nExistingSize) {
 302                                 // Read the next hash
 303                                 hashlist.push_back(CAICHHash(&file));
 304
 305                                 uint32 nHashCount = file.ReadUInt32();
 306                                 if (file.GetPosition() + nHashCount * CAICHHash::GetHashSize() > nExistingSize){
 307                                         throw CEOFException(wxT("Hashlist ends past end of file."));
 308                                 }
 309
 310                                 // skip the rest of this hashset
 311                                 nLastVerifiedPos = file.Seek(nHashCount * HASHSIZE, wxFromCurrent);
 312                         }
 313                 } catch (const CEOFException&) {
 314                         AddDebugLogLineC(logAICHThread, wxT("Hashlist corrupted, truncating file."));
 315                         file.Close();
 316                         file.Reopen(CFile::read_write);
 317                         file.SetLength(nLastVerifiedPos);
 318                 } catch (const CIOFailureException& e) {
 319                         AddDebugLogLineC(logAICHThread, wxT("IO failure while reading hashlist (Aborting): ") + e.what());
 320
 321                         return;
 322                 }
 323
 324                 AddDebugLogLineN( logAICHThread, wxT("Masterhashes of known files have been loaded.") );
 325         }
 326
 327         // Now we check that all files which are in the sharedfilelist have a
 328         // corresponding hash in our list. Those how don't are queued for hashing.
 329         theApp->sharedfiles->CheckAICHHashes(hashlist);
 330 }
 331
 332
 333 bool CAICHSyncTask::ConvertToKnown2ToKnown264()
 334 {
 335         // converting known2.met to known2_64.met to support large files
 336         // changing hashcount from uint16 to uint32
 337
 338         const CPath oldfullpath = CPath(theApp->ConfigDir + OLD_KNOWN2_MET_FILENAME);
 339         const CPath newfullpath = CPath(theApp->ConfigDir + KNOWN2_MET_FILENAME);
 340
 341         if (newfullpath.FileExists() || !oldfullpath.FileExists()) {
 342                 // In this case, there is nothing that we need to do.
 343                 return false;
 344         }
 345
 346         CFile oldfile;
 347         CFile newfile;
 348
 349         if (!oldfile.Open(oldfullpath, CFile::read)) {
 350                 AddDebugLogLineC(logAICHThread, wxT("Failed to open 'known2.met' file."));
 351
 352                 // else -> known2.met also doesn't exists, so nothing to convert
 353                 return false;
 354         }
 355
 356
 357         if (!newfile.Open(newfullpath, CFile::write_excl)) {
 358                 AddDebugLogLineC(logAICHThread, wxT("Failed to create 'known2_64.met' file."));
 359
 360                 return false;
 361         }
 362
 363         AddLogLineN(CFormat(_("Converting old AICH hashsets in '%s' to 64b in '%s'."))
 364                         % OLD_KNOWN2_MET_FILENAME % KNOWN2_MET_FILENAME);
 365
 366         try {
 367                 newfile.WriteUInt8(KNOWN2_MET_VERSION);
 368
 369                 while (newfile.GetPosition() < oldfile.GetLength()) {
 370                         CAICHHash aichHash(&oldfile);
 371                         uint32 nHashCount = oldfile.ReadUInt16();
 372
 373                         CScopedArray<byte> buffer(nHashCount * CAICHHash::GetHashSize());
 374
 375                         oldfile.Read(buffer.get(), nHashCount * CAICHHash::GetHashSize());
 376                         newfile.Write(aichHash.GetRawHash(), CAICHHash::GetHashSize());
 377                         newfile.WriteUInt32(nHashCount);
 378                         newfile.Write(buffer.get(), nHashCount * CAICHHash::GetHashSize());
 379                 }
 380                 newfile.Flush();
 381         } catch (const CEOFException& e) {
 382                 AddDebugLogLineC(logAICHThread, wxT("Error reading old 'known2.met' file.") + e.what());
 383                 return false;
 384         } catch (const CIOFailureException& e) {
 385                 AddDebugLogLineC(logAICHThread, wxT("IO error while converting 'known2.met' file: ") + e.what());
 386                 return false;
 387         }
 388
 389         // FIXME LARGE FILES (uncomment)
 390         //DeleteFile(oldfullpath);
 391
 392         return true;
 393 }
 394
 395
 396
 397 ////////////////////////////////////////////////////////////
 398 // CCompletionTask
 399
 400
 401 CCompletionTask::CCompletionTask(const CPartFile* file)
 402         // GetPrintable is used to improve the readability of the log.
 403         : CThreadTask(wxT("Completing"), file->GetFullName().GetPrintable(), ETP_High),
 404           m_filename(file->GetFileName()),
 405           m_metPath(file->GetFullName()),
 406           m_category(file->GetCategory()),
 407           m_owner(file),
 408           m_error(false)
 409 {
 410         wxASSERT(m_filename.IsOk());
 411         wxASSERT(m_metPath.IsOk());
 412         wxASSERT(m_owner);
 413 }
 414
 415
 416 void CCompletionTask::Entry()
 417 {
 418         CPath targetPath;
 419
 420         {
 421 #ifndef AMULE_DAEMON
 422                 // Prevent the preference values from changing underneeth us.
 423                 wxMutexGuiLocker guiLock;
 424 #else
 425                 //#warning Thread-safety needed
 426 #endif
 427
 428                 targetPath = theApp->glob_prefs->GetCategory(m_category)->path;
 429                 if (!targetPath.DirExists()) {
 430                         targetPath = thePrefs::GetIncomingDir();
 431                 }
 432         }
 433
 434         CPath dstName = m_filename.Cleanup(true, !PlatformSpecific::CanFSHandleSpecialChars(targetPath));
 435
 436         // Avoid empty filenames ...
 437         if (!dstName.IsOk()) {
 438                 dstName = CPath(wxT("Unknown"));
 439         }
 440
 441         if (m_filename != dstName) {
 442                 AddLogLineC(CFormat(_("WARNING: The filename '%s' is invalid and has been renamed to '%s'.")) % m_filename % dstName);
 443         }
 444
 445         // Avoid saving to an already existing filename
 446         CPath newName = targetPath.JoinPaths(dstName);
 447         for (unsigned count = 0; newName.FileExists(); ++count) {
 448                 wxString postfix = CFormat(wxT("(%u)")) % count;
 449
 450                 newName = targetPath.JoinPaths(dstName.AddPostfix(postfix));
 451         }
 452
 453         if (newName != targetPath.JoinPaths(dstName)) {
 454                 AddLogLineC(CFormat(_("WARNING: The file '%s' already exists, new file renamed to '%s'.")) % dstName % newName.GetFullName());
 455         }
 456
 457         // Move will handle dirs on the same partition, otherwise copy is needed.
 458         CPath partfilename = m_metPath.RemoveExt();
 459         if (!CPath::RenameFile(partfilename, newName)) {
 460                 if (!CPath::CloneFile(partfilename, newName, true)) {
 461                         m_error = true;
 462                         return;
 463                 }
 464
 465                 if (!CPath::RemoveFile(partfilename)) {
 466                         AddDebugLogLineC(logPartFile, CFormat(wxT("WARNING: Could not remove original '%s' after creating backup")) % partfilename);
 467                 }
 468         }
 469
 470         // Removes the various other data-files
 471         const wxChar* otherMetExt[] = { wxT(""), PARTMET_BAK_EXT, wxT(".seeds"), NULL };
 472         for (size_t i = 0; otherMetExt[i]; ++i) {
 473                 CPath toRemove = m_metPath.AppendExt(otherMetExt[i]);
 474
 475                 if (toRemove.FileExists()) {
 476                         if (!CPath::RemoveFile(toRemove)) {
 477                                 AddDebugLogLineC(logPartFile, CFormat(wxT("WARNING: Failed to delete %s")) % toRemove);
 478                         }
 479                 }
 480         }
 481
 482         m_newName = newName;
 483 }
 484
 485
 486 void CCompletionTask::OnExit()
 487 {
 488         // Notify the app that the completion has finished for this file.
 489         CCompletionEvent evt(m_error, m_owner, m_newName);
 490
 491         wxPostEvent(wxTheApp, evt);
 492 }
 493
 494
 495
 496 ////////////////////////////////////////////////////////////
 497 // CAllocateFileTask
 498
 499 #ifdef HAVE_FALLOCATE
 500 #       ifndef _GNU_SOURCE
 501 #               define _GNU_SOURCE
 502 #       endif
 503 #       ifdef HAVE_FCNTL_H
 504 #               include <fcntl.h>
 505 #       endif
 506 #       include <linux/falloc.h>
 507 #elif defined HAVE_SYS_FALLOCATE
 508 #       include <sys/syscall.h>
 509 #       include <sys/types.h>
 510 #       include <unistd.h>
 511 #elif defined HAVE_POSIX_FALLOCATE
 512 #       define _XOPEN_SOURCE 600
 513 #       include <stdlib.h>
 514 #       ifdef HAVE_FCNTL_H
 515 #               include <fcntl.h>
 516 #       endif
 517 #endif
 518 #include <stdlib.h>
 519 #include <errno.h>
 520
 521 CAllocateFileTask::CAllocateFileTask(CPartFile *file, bool pause)
 522         // GetPrintable is used to improve the readability of the log.
 523         : CThreadTask(wxT("Allocating"), file->GetFullName().RemoveExt().GetPrintable(), ETP_High),
 524           m_file(file), m_pause(pause), m_result(ENOSYS)
 525 {
 526         wxASSERT(file != NULL);
 527 }
 528
 529 void CAllocateFileTask::Entry()
 530 {
 531         if (m_file->GetFileSize() == 0) {
 532                 m_result = 0;
 533                 return;
 534         }
 535
 536         uint64_t minFree = thePrefs::IsCheckDiskspaceEnabled() ? thePrefs::GetMinFreeDiskSpace() : 0;
 537         int64_t freeSpace = CPath::GetFreeSpaceAt(thePrefs::GetTempDir());
 538
 539         // Don't even try to allocate, if there's no space to complete the operation.
 540         if (freeSpace != wxInvalidOffset) {
 541                 if ((uint64_t)freeSpace < m_file->GetFileSize() + minFree) {
 542                         m_result = ENOSPC;
 543                         return;
 544                 }
 545         }
 546
 547         CFile file;
 548         file.Open(m_file->GetFullName().RemoveExt(), CFile::read_write);
 549
 550 #ifdef __WXMSW__
 551         try {
 552                 // File is already created as non-sparse, so we only need to set the length.
 553                 // This will fail to allocate the file e.g. under wine on linux/ext3,
 554                 // but works with NTFS and FAT32.
 555                 file.Seek(m_file->GetFileSize() - 1, wxFromStart);
 556                 file.WriteUInt8(0);
 557                 file.Close();
 558                 m_result = 0;
 559         } catch (const CSafeIOException&) {
 560                 m_result = errno;
 561         }
 562 #else
 563         // Use kernel level routines if possible
 564 #  ifdef HAVE_FALLOCATE
 565         m_result = fallocate(file.fd(), 0, 0, m_file->GetFileSize());
 566 #  elif defined HAVE_SYS_FALLOCATE
 567         m_result = syscall(SYS_fallocate, file.fd(), 0, (loff_t)0, (loff_t)m_file->GetFileSize());
 568         if (m_result == -1) {
 569                 m_result = errno;
 570         }
 571 #  elif defined HAVE_POSIX_FALLOCATE
 572         // otherwise use glibc implementation, if available
 573         m_result = posix_fallocate(file.fd(), 0, m_file->GetFileSize());
 574 #  endif
 575
 576         if (m_result != 0 && m_result != ENOSPC) {
 577                 // If everything else fails, use slow-and-dirty method of allocating the file: write the whole file with zeroes.
 578 #  define BLOCK_SIZE    1048576         /* Write 1 MB blocks */
 579                 void *zero = calloc(1, BLOCK_SIZE);
 580                 if (zero != NULL) {
 581                         try {
 582                                 uint64_t size = m_file->GetFileSize();
 583                                 for (; size >= BLOCK_SIZE; size -= BLOCK_SIZE) {
 584                                         file.Write(zero, BLOCK_SIZE);
 585                                 }
 586                                 if (size > 0) {
 587                                         file.Write(zero, size);
 588                                 }
 589                                 file.Close();
 590                                 m_result = 0;
 591                         } catch (const CSafeIOException&) {
 592                                 m_result = errno;
 593                         }
 594                         free(zero);
 595                 } else {
 596                         m_result = ENOMEM;
 597                 }
 598         }
 599
 600 #endif
 601         if (file.IsOpened()) {
 602                 file.Close();
 603         }
 604 }
 605
 606 void CAllocateFileTask::OnExit()
 607 {
 608         // Notify the app that the preallocation has finished for this file.
 609         CAllocFinishedEvent evt(m_file, m_pause, m_result);
 610
 611         wxPostEvent(wxTheApp, evt);
 612 }
 613
 614
 615
 616 ////////////////////////////////////////////////////////////
 617 // CHashingEvent
 618
 619 DEFINE_LOCAL_EVENT_TYPE(MULE_EVT_HASHING)
 620 DEFINE_LOCAL_EVENT_TYPE(MULE_EVT_AICH_HASHING)
 621
 622 CHashingEvent::CHashingEvent(wxEventType type, CKnownFile* result, const CKnownFile* owner)
 623         : wxEvent(-1, type),
 624           m_owner(owner),
 625           m_result(result)
 626 {
 627 }
 628
 629
 630 wxEvent* CHashingEvent::Clone() const
 631 {
 632         return new CHashingEvent(GetEventType(), m_result, m_owner);
 633 }
 634
 635
 636 const CKnownFile* CHashingEvent::GetOwner() const
 637 {
 638         return m_owner;
 639 }
 640
 641
 642 CKnownFile* CHashingEvent::GetResult() const
 643 {
 644         return m_result;
 645 }
 646
 647
 648
 649
 650 ////////////////////////////////////////////////////////////
 651 // CCompletionEvent
 652
 653 DEFINE_LOCAL_EVENT_TYPE(MULE_EVT_FILE_COMPLETED)
 654
 655
 656 CCompletionEvent::CCompletionEvent(bool errorOccured, const CPartFile* owner, const CPath& fullPath)
 657         : wxEvent(-1, MULE_EVT_FILE_COMPLETED),
 658           m_fullPath(fullPath),
 659           m_owner(owner),
 660           m_error(errorOccured)
 661 {
 662 }
 663
 664
 665 wxEvent* CCompletionEvent::Clone() const
 666 {
 667         return new CCompletionEvent(m_error, m_owner, m_fullPath);
 668 }
 669
 670
 671 bool CCompletionEvent::ErrorOccured() const
 672 {
 673         return m_error;
 674 }
 675
 676
 677 const CPartFile* CCompletionEvent::GetOwner() const
 678 {
 679         return m_owner;
 680 }
 681
 682
 683 const CPath& CCompletionEvent::GetFullPath() const
 684 {
 685         return m_fullPath;
 686 }
 687
 688
 689 ////////////////////////////////////////////////////////////
 690 // CAllocFinishedEvent
 691
 692 DEFINE_LOCAL_EVENT_TYPE(MULE_EVT_ALLOC_FINISHED)
 693
 694 wxEvent *CAllocFinishedEvent::Clone() const
 695 {
 696         return new CAllocFinishedEvent(m_file, m_pause, m_result);
 697 }
 698
 699 // File_checked_for_headers