src/TGitCache/GITStatusCache.cpp

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