src/TGitCache/GITStatusCache.cpp

   1 // TortoiseGit - a Windows shell extension for easy version control
   2
   3 // External Cache Copyright (C) 2005-2006,2008,2010,2014 - TortoiseSVN
   4 // Copyright (C) 2008-2014 - TortoiseGit
   5
   6 // This program is free software; you can redistribute it and/or
   7 // modify it under the terms of the GNU General Public License
   8 // as published by the Free Software Foundation; either version 2
   9 // of the License, or (at your option) any later version.
  10
  11 // This program is distributed in the hope that it will be useful,
  12 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 // GNU General Public License for more details.
  15
  16 // You should have received a copy of the GNU General Public License
  17 // along with this program; if not, write to the Free Software Foundation,
  18 // 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  19 //
  20
  21 #include "stdafx.h"
  22 #include "GitStatus.h"
  23 #include "GitStatusCache.h"
  24 #include "CacheInterface.h"
  25 #include <ShlObj.h>
  26 #include "SysInfo.h"
  27 #include "PathUtils.h"
  28
  29 //////////////////////////////////////////////////////////////////////////
  30
  31 #define BLOCK_PATH_DEFAULT_TIMEOUT      600             // 10 minutes
  32 #define BLOCK_PATH_MAX_TIMEOUT          1200    // 20 minutes
  33
  34 #define CACHEDISKVERSION 2
  35
  36 #ifdef _WIN64
  37 #define STATUSCACHEFILENAME L"cache64"
  38 #else
  39 #define STATUSCACHEFILENAME L"cache"
  40 #endif
  41
  42 CGitStatusCache* CGitStatusCache::m_pInstance;
  43
  44 CGitStatusCache& CGitStatusCache::Instance()
  45 {
  46         ATLASSERT(m_pInstance != NULL);
  47         return *m_pInstance;
  48 }
  49
  50 void CGitStatusCache::Create()
  51 {
  52         ATLASSERT(m_pInstance == NULL);
  53         m_pInstance = new CGitStatusCache;
  54
  55         m_pInstance->watcher.SetFolderCrawler(&m_pInstance->m_folderCrawler);
  56
  57         if (!CRegStdDWORD(_T("Software\\TortoiseGit\\CacheSave"), TRUE))
  58                 return;
  59
  60 #define LOADVALUEFROMFILE(x) if (fread(&x, sizeof(x), 1, pFile)!=1) goto exit;
  61 #define LOADVALUEFROMFILE2(x) if (fread(&x, sizeof(x), 1, pFile)!=1) goto error;
  62         unsigned int value = (unsigned int)-1;
  63         FILE * pFile = NULL;
  64         // find the location of the cache
  65         CString path = CPathUtils::GetLocalAppDataDirectory();
  66         CString path2;
  67         if (!path.IsEmpty())
  68         {
  69                 path += STATUSCACHEFILENAME;
  70                 // in case the cache file is corrupt, we could crash while
  71                 // reading it! To prevent crashing every time once that happens,
  72                 // we make a copy of the cache file and use that copy to read from.
  73                 // if that copy is corrupt, the original file won't exist anymore
  74                 // and the second time we start up and try to read the file,
  75                 // it's not there anymore and we start from scratch without a crash.
  76                 path2 = path;
  77                 path2 += _T("2");
  78                 DeleteFile(path2);
  79                 CopyFile(path, path2, FALSE);
  80                 DeleteFile(path);
  81                 pFile = _tfsopen(path2, _T("rb"), _SH_DENYNO);
  82                 if (pFile)
  83                 {
  84                         try
  85                         {
  86                                 LOADVALUEFROMFILE(value);
  87                                 if (value != CACHEDISKVERSION)
  88                                 {
  89                                         goto error;
  90                                 }
  91                                 int mapsize = 0;
  92                                 LOADVALUEFROMFILE(mapsize);
  93                                 for (int i=0; i<mapsize; ++i)
  94                                 {
  95                                         LOADVALUEFROMFILE2(value);
  96                                         if (value > MAX_PATH)
  97                                                 goto error;
  98                                         if (value)
  99                                         {
 100                                                 CString sKey;
 101                                                 if (fread(sKey.GetBuffer(value+1), sizeof(TCHAR), value, pFile)!=value)
 102                                                 {
 103                                                         sKey.ReleaseBuffer(0);
 104                                                         goto error;
 105                                                 }
 106                                                 sKey.ReleaseBuffer(value);
 107                                                 std::unique_ptr<CCachedDirectory> cacheddir (new CCachedDirectory());
 108                                                 if (!cacheddir.get() || !cacheddir->LoadFromDisk(pFile))
 109                                                 {
 110                                                         cacheddir.reset();
 111                                                         goto error;
 112                                                 }
 113                                                 CTGitPath KeyPath = CTGitPath(sKey);
 114                                                 if (m_pInstance->IsPathAllowed(KeyPath))
 115                                                 {
 116                                                         // only add the path to the watch list if it is versioned
 117                                                         if ((cacheddir->GetCurrentFullStatus() != git_wc_status_unversioned)&&(cacheddir->GetCurrentFullStatus() != git_wc_status_none))
 118                                                                 m_pInstance->watcher.AddPath(KeyPath, false);
 119
 120                                                         m_pInstance->m_directoryCache[KeyPath] = cacheddir.release();
 121
 122                                                         // do *not* add the paths for crawling!
 123                                                         // because crawled paths will trigger a shell
 124                                                         // notification, which makes the desktop flash constantly
 125                                                         // until the whole first time crawling is over
 126                                                         // m_pInstance->AddFolderForCrawling(KeyPath);
 127                                                 }
 128                                         }
 129                                 }
 130                         }
 131                         catch (CAtlException)
 132                         {
 133                                 goto error;
 134                         }
 135                 }
 136         }
 137 exit:
 138         if (pFile)
 139                 fclose(pFile);
 140         DeleteFile(path2);
 141         m_pInstance->watcher.ClearInfoMap();
 142         CTraceToOutputDebugString::Instance()(__FUNCTION__ ": cache loaded from disk successfully!\n");
 143         return;
 144 error:
 145         if (pFile)
 146                 fclose(pFile);
 147         DeleteFile(path2);
 148         m_pInstance->watcher.ClearInfoMap();
 149         Destroy();
 150         m_pInstance = new CGitStatusCache;
 151         CTraceToOutputDebugString::Instance()(__FUNCTION__ ": cache not loaded from disk\n");
 152 }
 153
 154 bool CGitStatusCache::SaveCache()
 155 {
 156         if (!CRegStdDWORD(_T("Software\\TortoiseGit\\CacheSave"), TRUE))
 157                 return false;
 158
 159 #define WRITEVALUETOFILE(x) if (fwrite(&x, sizeof(x), 1, pFile)!=1) goto error;
 160         unsigned int value = 0;
 161         // save the cache to disk
 162         FILE * pFile = NULL;
 163         // find a location to write the cache to
 164         CString path = CPathUtils::GetLocalAppDataDirectory();
 165         if (!path.IsEmpty())
 166         {
 167                 path += STATUSCACHEFILENAME;
 168                 _tfopen_s(&pFile, path, _T("wb"));
 169                 if (pFile)
 170                 {
 171                         value = CACHEDISKVERSION;
 172                         WRITEVALUETOFILE(value);
 173                         value = (int)m_pInstance->m_directoryCache.size();
 174                         WRITEVALUETOFILE(value);
 175                         for (CCachedDirectory::CachedDirMap::iterator I = m_pInstance->m_directoryCache.begin(); I != m_pInstance->m_directoryCache.end(); ++I)
 176                         {
 177                                 if (I->second == NULL)
 178                                 {
 179                                         value = 0;
 180                                         WRITEVALUETOFILE(value);
 181                                         continue;
 182                                 }
 183                                 const CString& key = I->first.GetWinPathString();
 184                                 value = key.GetLength();
 185                                 WRITEVALUETOFILE(value);
 186                                 if (value)
 187                                 {
 188                                         if (fwrite((LPCTSTR)key, sizeof(TCHAR), value, pFile)!=value)
 189                                                 goto error;
 190                                         if (!I->second->SaveToDisk(pFile))
 191                                                 goto error;
 192                                 }
 193                         }
 194                         fclose(pFile);
 195                 }
 196         }
 197         CTraceToOutputDebugString::Instance()(_T(__FUNCTION__) _T(": cache saved to disk at %s\n"), path);
 198         return true;
 199 error:
 200         fclose(pFile);
 201         Destroy();
 202         DeleteFile(path);
 203         return false;
 204 }
 205
 206 void CGitStatusCache::Destroy()
 207 {
 208         if (m_pInstance)
 209         {
 210                 m_pInstance->Stop();
 211                 Sleep(100);
 212                 delete m_pInstance;
 213                 m_pInstance = NULL;
 214         }
 215 }
 216
 217 void CGitStatusCache::Stop()
 218 {
 219 //      m_svnHelp.Cancel(true);
 220         watcher.Stop();
 221         m_folderCrawler.Stop();
 222         m_shellUpdater.Stop();
 223 }
 224
 225 void CGitStatusCache::Init()
 226 {
 227         m_folderCrawler.Initialise();
 228         m_shellUpdater.Initialise();
 229 }
 230
 231 CGitStatusCache::CGitStatusCache(void)
 232 {
 233         #define forever DWORD(-1)
 234         AutoLocker lock(m_NoWatchPathCritSec);
 235         TCHAR path[MAX_PATH] = { 0 };
 236         SHGetFolderPath(NULL, CSIDL_COOKIES, NULL, 0, path);
 237         m_NoWatchPaths[CTGitPath(CString(path))] = forever;
 238         SecureZeroMemory(path, sizeof(path));
 239         SHGetFolderPath(NULL, CSIDL_HISTORY, NULL, 0, path);
 240         m_NoWatchPaths[CTGitPath(CString(path))] = forever;
 241         SecureZeroMemory(path, sizeof(path));
 242         SHGetFolderPath(NULL, CSIDL_INTERNET_CACHE, NULL, 0, path);
 243         m_NoWatchPaths[CTGitPath(CString(path))] = forever;
 244         SecureZeroMemory(path, sizeof(path));
 245         SHGetFolderPath(NULL, CSIDL_SYSTEM, NULL, 0, path);
 246         m_NoWatchPaths[CTGitPath(CString(path))] = forever;
 247         SecureZeroMemory(path, sizeof(path));
 248         SHGetFolderPath(NULL, CSIDL_WINDOWS, NULL, 0, path);
 249         m_NoWatchPaths[CTGitPath(CString(path))] = forever;
 250         if (SysInfo::Instance().IsVistaOrLater())
 251         {
 252                 CAutoLibrary hShell = AtlLoadSystemLibraryUsingFullPath(_T("shell32.dll"));
 253                 if (hShell)
 254                 {
 255                         typedef HRESULT STDAPICALLTYPE SHGetKnownFolderPathFN(__in REFKNOWNFOLDERID rfid, __in DWORD dwFlags, __in_opt HANDLE hToken, __deref_out PWSTR *ppszPath);
 256                         SHGetKnownFolderPathFN *pfnSHGetKnownFolderPath = (SHGetKnownFolderPathFN*)GetProcAddress(hShell, "SHGetKnownFolderPath");
 257                         if (pfnSHGetKnownFolderPath)
 258                         {
 259                                 KNOWNFOLDERID folderids[] = { FOLDERID_Cookies, FOLDERID_History, FOLDERID_InternetCache, FOLDERID_Windows, FOLDERID_CDBurning, FOLDERID_Fonts, FOLDERID_RecycleBinFolder }; //FOLDERID_SearchHistory
 260                                 for (KNOWNFOLDERID folderid : folderids)
 261                                 {
 262                                         PWSTR pszPath = NULL;
 263                                         if (pfnSHGetKnownFolderPath(folderid, KF_FLAG_CREATE, NULL, &pszPath) != S_OK)
 264                                                 continue;
 265
 266                                         m_NoWatchPaths[CTGitPath(CString(pszPath))] = forever;
 267                                         CoTaskMemFree(pszPath);
 268                                 }
 269                         }
 270                 }
 271         }
 272         m_bClearMemory = false;
 273         m_mostRecentExpiresAt = 0;
 274 }
 275
 276 CGitStatusCache::~CGitStatusCache(void)
 277 {
 278         CAutoWriteLock writeLock(m_guard);
 279         ClearCache();
 280 }
 281
 282 void CGitStatusCache::Refresh()
 283 {
 284         m_shellCache.ForceRefresh();
 285 //      m_pInstance->m_svnHelp.ReloadConfig();
 286         if (!m_pInstance->m_directoryCache.empty())
 287         {
 288                 CCachedDirectory::CachedDirMap::iterator I = m_pInstance->m_directoryCache.begin();
 289                 for (/* no init */; I != m_pInstance->m_directoryCache.end(); ++I)
 290                 {
 291                         if (m_shellCache.IsPathAllowed(I->first.GetWinPath()))
 292                                 I->second->RefreshMostImportant();
 293                         else
 294                         {
 295                                 CGitStatusCache::Instance().RemoveCacheForPath(I->first);
 296                                 I = m_pInstance->m_directoryCache.begin();
 297                                 if (I == m_pInstance->m_directoryCache.end())
 298                                         break;
 299                         }
 300                 }
 301         }
 302 }
 303
 304 bool CGitStatusCache::IsPathGood(const CTGitPath& path)
 305 {
 306         AutoLocker lock(m_NoWatchPathCritSec);
 307         for (std::map<CTGitPath, DWORD>::const_iterator it = m_NoWatchPaths.begin(); it != m_NoWatchPaths.end(); ++it)
 308         {
 309                 // the ticks check is necessary here, because RemoveTimedoutBlocks is only called within the FolderCrawler loop
 310                 // and we might miss update calls
 311                 // TODO: maybe we also need to check if index.lock and HEAD.lock still exists after a specific timeout (if we miss update notifications for these files too often)
 312                 if (GetTickCount() < it->second && it->first.IsAncestorOf(path))
 313                 {
 314                         CTraceToOutputDebugString::Instance()(_T(__FUNCTION__) _T(": path not good: %s\n"), it->first.GetWinPath());
 315                         return false;
 316                 }
 317         }
 318         return true;
 319 }
 320
 321 bool CGitStatusCache::BlockPath(const CTGitPath& path, DWORD timeout /* = 0 */)
 322 {
 323         if (timeout == 0)
 324                 timeout = BLOCK_PATH_DEFAULT_TIMEOUT;
 325
 326         if (timeout > BLOCK_PATH_MAX_TIMEOUT)
 327                 timeout = BLOCK_PATH_MAX_TIMEOUT;
 328
 329         timeout = GetTickCount() + (timeout * 1000);    // timeout is in seconds, but we need the milliseconds
 330
 331         AutoLocker lock(m_NoWatchPathCritSec);
 332         m_NoWatchPaths[path.GetDirectory()] = timeout;
 333
 334         return true;
 335 }
 336
 337 bool CGitStatusCache::UnBlockPath(const CTGitPath& path)
 338 {
 339         bool ret = false;
 340         AutoLocker lock(m_NoWatchPathCritSec);
 341         std::map<CTGitPath, DWORD>::iterator it = m_NoWatchPaths.find(path.GetDirectory());
 342         if (it != m_NoWatchPaths.end())
 343         {
 344                 CTraceToOutputDebugString::Instance()(_T(__FUNCTION__) _T(": path removed from no good: %s\n"), it->first.GetWinPath());
 345                 m_NoWatchPaths.erase(it);
 346                 ret = true;
 347         }
 348         AddFolderForCrawling(path.GetDirectory());
 349
 350         return ret;
 351 }
 352
 353 bool CGitStatusCache::RemoveTimedoutBlocks()
 354 {
 355         bool ret = false;
 356         DWORD currentTicks = GetTickCount();
 357         AutoLocker lock(m_NoWatchPathCritSec);
 358         std::vector<CTGitPath> toRemove;
 359         for (std::map<CTGitPath, DWORD>::const_iterator it = m_NoWatchPaths.begin(); it != m_NoWatchPaths.end(); ++it)
 360         {
 361                 if (currentTicks > it->second)
 362                 {
 363                         toRemove.push_back(it->first);
 364                 }
 365         }
 366         if (!toRemove.empty())
 367         {
 368                 for (std::vector<CTGitPath>::const_iterator it = toRemove.begin(); it != toRemove.end(); ++it)
 369                 {
 370                         ret = ret || UnBlockPath(*it);
 371                 }
 372         }
 373
 374         return ret;
 375 }
 376
 377 void CGitStatusCache::UpdateShell(const CTGitPath& path)
 378 {
 379         m_shellUpdater.AddPathForUpdate(path);
 380 }
 381
 382 void CGitStatusCache::ClearCache()
 383 {
 384         CAutoWriteLock writeLock(m_guard);
 385         for (CCachedDirectory::CachedDirMap::iterator I = m_directoryCache.begin(); I != m_directoryCache.end(); ++I)
 386         {
 387                 delete I->second;
 388                 I->second = NULL;
 389         }
 390         m_directoryCache.clear();
 391 }
 392
 393 bool CGitStatusCache::RemoveCacheForDirectory(CCachedDirectory * cdir)
 394 {
 395         if (cdir == NULL)
 396                 return false;
 397
 398         typedef std::map<CTGitPath, git_wc_status_kind>  ChildDirStatus;
 399         CAutoWriteLock writeLock(m_guard);
 400         if (!cdir->m_childDirectories.empty())
 401         {
 402                 ChildDirStatus::iterator it = cdir->m_childDirectories.begin();
 403                 for (; it != cdir->m_childDirectories.end(); )
 404                 {
 405                         CCachedDirectory * childdir = CGitStatusCache::Instance().GetDirectoryCacheEntryNoCreate(it->first);
 406                         if ((childdir) && (!cdir->m_directoryPath.IsEquivalentTo(childdir->m_directoryPath)) && (cdir->m_directoryPath.GetFileOrDirectoryName() != L".."))
 407                                 RemoveCacheForDirectory(childdir);
 408                         cdir->m_childDirectories.erase(it->first);
 409                         it = cdir->m_childDirectories.begin();
 410                 }
 411         }
 412         cdir->m_childDirectories.clear();
 413         m_directoryCache.erase(cdir->m_directoryPath);
 414
 415         // we could have entries versioned and/or stored in our cache which are
 416         // children of the specified directory, but not in the m_childDirectories
 417         // member
 418         CCachedDirectory::ItDir itMap = m_directoryCache.lower_bound(cdir->m_directoryPath);
 419         do
 420         {
 421                 if (itMap != m_directoryCache.end())
 422                 {
 423                         if (cdir->m_directoryPath.IsAncestorOf(itMap->first))
 424                         {
 425                                 // just in case (see TortoiseSVN issue #255)
 426                                 if (itMap->second == cdir)
 427                                 {
 428                                         m_directoryCache.erase(itMap);
 429                                 }
 430                                 else
 431                                         RemoveCacheForDirectory(itMap->second);
 432                         }
 433                 }
 434                 itMap = m_directoryCache.lower_bound(cdir->m_directoryPath);
 435         } while (itMap != m_directoryCache.end() && cdir->m_directoryPath.IsAncestorOf(itMap->first));
 436
 437         CTraceToOutputDebugString::Instance()(_T(__FUNCTION__) _T(": removed from cache %s\n"), cdir->m_directoryPath.GetWinPathString());
 438         delete cdir;
 439         return true;
 440 }
 441
 442 void CGitStatusCache::RemoveCacheForPath(const CTGitPath& path)
 443 {
 444         // Stop the crawler starting on a new folder
 445         CCrawlInhibitor crawlInhibit(&m_folderCrawler);
 446         CCachedDirectory::ItDir itMap;
 447         CCachedDirectory * dirtoremove = NULL;
 448
 449         itMap = m_directoryCache.find(path);
 450         if ((itMap != m_directoryCache.end())&&(itMap->second))
 451                 dirtoremove = itMap->second;
 452         if (dirtoremove == NULL)
 453                 return;
 454         ATLASSERT(path.IsEquivalentToWithoutCase(dirtoremove->m_directoryPath));
 455         RemoveCacheForDirectory(dirtoremove);
 456 }
 457
 458 CCachedDirectory * CGitStatusCache::GetDirectoryCacheEntry(const CTGitPath& path, bool isAddToWatch)
 459 {
 460         ATLASSERT(path.IsDirectory() || !PathFileExists(path.GetWinPath()));
 461
 462
 463         CCachedDirectory::ItDir itMap;
 464         itMap = m_directoryCache.find(path);
 465         if ((itMap != m_directoryCache.end())&&(itMap->second))
 466         {
 467                 // We've found this directory in the cache
 468                 return itMap->second;
 469         }
 470         else
 471         {
 472                 // if the CCachedDirectory is NULL but the path is in our cache,
 473                 // that means that path got invalidated and needs to be treated
 474                 // as if it never was in our cache. So we remove the last remains
 475                 // from the cache and start from scratch.
 476
 477                 CAutoWriteLock writeLock(m_guard);
 478                 // Since above there's a small chance that before we can upgrade to
 479                 // writer state some other thread gained writer state and changed
 480                 // the data, we have to recreate the iterator here again.
 481                 itMap = m_directoryCache.find(path);
 482                 if (itMap!=m_directoryCache.end())
 483                 {
 484                         delete itMap->second;
 485                         m_directoryCache.erase(itMap);
 486                 }
 487                 // We don't know anything about this directory yet - lets add it to our cache
 488                 // but only if it exists!
 489                 if (path.Exists() && m_shellCache.IsPathAllowed(path.GetWinPath()) && !g_GitAdminDir.IsAdminDirPath(path.GetWinPath()))
 490                 {
 491                         // some notifications are for files which got removed/moved around.
 492                         // In such cases, the CTGitPath::IsDirectory() will return true (it assumes a directory if
 493                         // the path doesn't exist). Which means we can get here with a path to a file
 494                         // instead of a directory.
 495                         // Since we're here most likely called from the crawler thread, the file could exist
 496                         // again. If that's the case, just do nothing
 497                         if (path.IsDirectory()||(!path.Exists()))
 498                         {
 499                                 CTraceToOutputDebugString::Instance()(_T(__FUNCTION__) _T(": adding %s to our cache\n"), path.GetWinPath());
 500                                 CCachedDirectory * newcdir = new CCachedDirectory(path);
 501                                 if (newcdir)
 502                                 {
 503                                         CCachedDirectory * cdir = m_directoryCache.insert(m_directoryCache.lower_bound(path), std::make_pair(path, newcdir))->second;
 504                                         CString gitdir;
 505                                         if ((!path.IsEmpty())&&(path.HasAdminDir(&gitdir))&&isAddToWatch)
 506                                         {
 507                                                 /* Just watch version path */
 508                                                 watcher.AddPath(gitdir);
 509                                                 watcher.AddPath(path);
 510                                         }
 511                                         return cdir;
 512                                 }
 513                                 m_bClearMemory = true;
 514                         }
 515                 }
 516                 return NULL;
 517         }
 518 }
 519
 520 CCachedDirectory * CGitStatusCache::GetDirectoryCacheEntryNoCreate(const CTGitPath& path)
 521 {
 522         ATLASSERT(path.IsDirectory() || !PathFileExists(path.GetWinPath()));
 523
 524         CCachedDirectory::ItDir itMap;
 525         itMap = m_directoryCache.find(path);
 526         if(itMap != m_directoryCache.end())
 527         {
 528                 // We've found this directory in the cache
 529                 return itMap->second;
 530         }
 531         return NULL;
 532 }
 533
 534 /* Fetch is true, means fetch status from */
 535 /* Fetch is false, means fetch status from cache */
 536 CStatusCacheEntry CGitStatusCache::GetStatusForPath(const CTGitPath& path, DWORD flags,  bool bFetch /* = true */)
 537 {
 538         bool bRecursive = !!(flags & TGITCACHE_FLAGS_RECUSIVE_STATUS);
 539
 540         // Check a very short-lived 'mini-cache' of the last thing we were asked for.
 541         long now = (long)GetTickCount();
 542         if(now-m_mostRecentExpiresAt < 0)
 543         {
 544                 if(path.IsEquivalentToWithoutCase(m_mostRecentPath))
 545                 {
 546                         return m_mostRecentStatus;
 547                 }
 548         }
 549         {
 550                 AutoLocker lock(m_critSec);
 551                 m_mostRecentPath = path;
 552                 m_mostRecentExpiresAt = now + 1000;
 553         }
 554
 555         if (IsPathGood(path))
 556         {
 557                 // Stop the crawler starting on a new folder while we're doing this much more important task...
 558                 // Please note, that this may be a second "lock" used concurrently to the one in RemoveCacheForPath().
 559                 CCrawlInhibitor crawlInhibit(&m_folderCrawler);
 560
 561                 CTGitPath dirpath = path.GetContainingDirectory();
 562                 if ((dirpath.IsEmpty()) || (!m_shellCache.IsPathAllowed(dirpath.GetWinPath())))
 563                         dirpath = path.GetDirectory();
 564                 CCachedDirectory * cachedDir = GetDirectoryCacheEntry(dirpath);
 565                 if (cachedDir != NULL)
 566                 {
 567                         //CTraceToOutputDebugString::Instance()(_T(__FUNCTION__) _T(": GetStatusForMember %d\n"), bFetch);
 568                         CStatusCacheEntry entry = cachedDir->GetStatusForMember(path, bRecursive, bFetch);
 569                         {
 570                                 AutoLocker lock(m_critSec);
 571                                 m_mostRecentStatus = entry;
 572                                 return m_mostRecentStatus;
 573                         }
 574                 }
 575         }
 576         else
 577         {
 578                 // path is blocked for some reason: return the cached status if we have one
 579                 // we do here only a cache search, absolutely no disk access is allowed!
 580                 CCachedDirectory::ItDir itMap = m_directoryCache.find(path.GetDirectory());
 581                 if ((itMap != m_directoryCache.end())&&(itMap->second))
 582                 {
 583                         if (path.IsDirectory())
 584                         {
 585                                 CStatusCacheEntry entry = itMap->second->GetOwnStatus(false);
 586                                 AutoLocker lock(m_critSec);
 587                                 m_mostRecentStatus = entry;
 588                                 return m_mostRecentStatus;
 589                         }
 590                         else
 591                         {
 592                                 // We've found this directory in the cache
 593                                 CCachedDirectory * cachedDir = itMap->second;
 594                                 CStatusCacheEntry entry = cachedDir->GetCacheStatusForMember(path);
 595                                 {
 596                                         AutoLocker lock(m_critSec);
 597                                         m_mostRecentStatus = entry;
 598                                         return m_mostRecentStatus;
 599                                 }
 600                         }
 601                 }
 602         }
 603         AutoLocker lock(m_critSec);
 604         CTraceToOutputDebugString::Instance()(_T(__FUNCTION__) _T(": ignored no good path %s\n"), path.GetWinPath());
 605         m_mostRecentStatus = CStatusCacheEntry();
 606         if (m_shellCache.ShowExcludedAsNormal() && path.IsDirectory() && m_shellCache.HasGITAdminDir(path.GetWinPath(), true))
 607         {
 608                 CTraceToOutputDebugString::Instance()(_T(__FUNCTION__) _T(": force status %s\n"), path.GetWinPath());
 609                 m_mostRecentStatus.ForceStatus(git_wc_status_normal);
 610         }
 611         return m_mostRecentStatus;
 612 }
 613
 614 void CGitStatusCache::AddFolderForCrawling(const CTGitPath& path)
 615 {
 616         m_folderCrawler.AddDirectoryForUpdate(path);
 617 }
 618
 619 void CGitStatusCache::CloseWatcherHandles(HANDLE hFile)
 620 {
 621         CTGitPath path = watcher.CloseInfoMap(hFile);
 622         if (!path.IsEmpty())
 623                 m_folderCrawler.BlockPath(path);
 624         CGitStatusCache::Instance().m_GitStatus.ReleasePathsRecursively(path.GetWinPathString());
 625 }
 626
 627 void CGitStatusCache::CloseWatcherHandles(const CTGitPath& path)
 628 {
 629         watcher.CloseHandlesForPath(path);
 630         m_folderCrawler.ReleasePathForUpdate(path);
 631         CGitStatusCache::Instance().m_GitStatus.ReleasePathsRecursively(path.GetWinPathString());
 632 }