src/TGitCache/DirectoryWatcher.cpp

   1 // TortoiseGit - a Windows shell extension for easy version control
   2
   3 // External Cache Copyright (C) 2005-2008, 2011-2012 - 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 #include "stdafx.h"
  21 #include <Dbt.h>
  22 #include "GitStatusCache.h"
  23 #include "DirectoryWatcher.h"
  24 #include "GitIndex.h"
  25 #include "SmartHandle.h"
  26
  27 #include <list>
  28
  29 extern HWND hWnd;
  30 extern CGitAdminDirMap g_AdminDirMap;
  31
  32 CDirectoryWatcher::CDirectoryWatcher(void)
  33         : m_bRunning(TRUE)
  34         , m_bCleaned(FALSE)
  35         , m_FolderCrawler(NULL)
  36         , blockTickCount(0)
  37 {
  38         // enable the required privileges for this process
  39
  40         LPCTSTR arPrivelegeNames[] = {  SE_BACKUP_NAME,
  41                                                                         SE_RESTORE_NAME,
  42                                                                         SE_CHANGE_NOTIFY_NAME
  43                                                                  };
  44
  45         for (int i=0; i<(sizeof(arPrivelegeNames)/sizeof(LPCTSTR)); ++i)
  46         {
  47                 CAutoGeneralHandle hToken;
  48                 if (OpenProcessToken(GetCurrentProcess(), TOKEN_ADJUST_PRIVILEGES, hToken.GetPointer()))
  49                 {
  50                         TOKEN_PRIVILEGES tp = { 1 };
  51
  52                         if (LookupPrivilegeValue(NULL, arPrivelegeNames[i], &tp.Privileges[0].Luid))
  53                         {
  54                                 tp.Privileges[0].Attributes = SE_PRIVILEGE_ENABLED;
  55
  56                                 AdjustTokenPrivileges(hToken, FALSE, &tp, sizeof(tp), NULL, NULL);
  57                         }
  58                 }
  59         }
  60
  61         unsigned int threadId = 0;
  62         m_hThread = (HANDLE)_beginthreadex(NULL,0,ThreadEntry,this,0,&threadId);
  63 }
  64
  65 CDirectoryWatcher::~CDirectoryWatcher(void)
  66 {
  67         Stop();
  68         AutoLocker lock(m_critSec);
  69         ClearInfoMap();
  70         CleanupWatchInfo();
  71 }
  72
  73 void CDirectoryWatcher::CloseCompletionPort()
  74 {
  75         m_hCompPort.CloseHandle();
  76 }
  77
  78 void CDirectoryWatcher::ScheduleForDeletion (CDirWatchInfo* info)
  79 {
  80         infoToDelete.push_back (info);
  81 }
  82
  83 void CDirectoryWatcher::CleanupWatchInfo()
  84 {
  85         AutoLocker lock(m_critSec);
  86         InterlockedExchange(&m_bCleaned, TRUE);
  87         while (!infoToDelete.empty())
  88         {
  89                 CDirWatchInfo* info = infoToDelete.back();
  90                 infoToDelete.pop_back();
  91                 delete info;
  92         }
  93 }
  94
  95 void CDirectoryWatcher::Stop()
  96 {
  97         InterlockedExchange(&m_bRunning, FALSE);
  98         CloseWatchHandles();
  99         WaitForSingleObject(m_hThread, 4000);
 100         m_hThread.CloseHandle();
 101 }
 102
 103 void CDirectoryWatcher::SetFolderCrawler(CFolderCrawler * crawler)
 104 {
 105         m_FolderCrawler = crawler;
 106 }
 107
 108 bool CDirectoryWatcher::RemovePathAndChildren(const CTGitPath& path)
 109 {
 110         bool bRemoved = false;
 111         AutoLocker lock(m_critSec);
 112 repeat:
 113         for (int i=0; i<watchedPaths.GetCount(); ++i)
 114         {
 115                 if (path.IsAncestorOf(watchedPaths[i]))
 116                 {
 117                         watchedPaths.RemovePath(watchedPaths[i]);
 118                         bRemoved = true;
 119                         goto repeat;
 120                 }
 121         }
 122         return bRemoved;
 123 }
 124
 125 void CDirectoryWatcher::BlockPath(const CTGitPath& path)
 126 {
 127         blockedPath = path;
 128         // block the path from being watched for 4 seconds
 129         blockTickCount = GetTickCount()+4000;
 130         CTraceToOutputDebugString::Instance()(_T(__FUNCTION__) _T(": Blocking path: %s\n"), path.GetWinPath());
 131 }
 132
 133 bool CDirectoryWatcher::AddPath(const CTGitPath& path, bool bCloseInfoMap)
 134 {
 135         if (!CGitStatusCache::Instance().IsPathAllowed(path))
 136                 return false;
 137         if ((!blockedPath.IsEmpty())&&(blockedPath.IsAncestorOf(path)))
 138         {
 139                 if (GetTickCount() < blockTickCount)
 140                 {
 141                         CTraceToOutputDebugString::Instance()(_T(__FUNCTION__) _T(": Path %s prevented from being watched\n"), path.GetWinPath());
 142                         return false;
 143                 }
 144         }
 145
 146         if (path.GetWinPathString().Find(L":\\RECYCLER\\") >= 0)
 147                 return false;
 148         if (path.GetWinPathString().Find(L":\\$Recycle.Bin\\") >= 0)
 149                 return false;
 150
 151         AutoLocker lock(m_critSec);
 152         for (int i=0; i<watchedPaths.GetCount(); ++i)
 153         {
 154                 if (watchedPaths[i].IsAncestorOf(path))
 155                         return false;           // already watched (recursively)
 156         }
 157
 158         // now check if with the new path we might have a new root
 159         CTGitPath newroot;
 160         for (int i=0; i<watchedPaths.GetCount(); ++i)
 161         {
 162                 const CString& watched = watchedPaths[i].GetWinPathString();
 163                 const CString& sPath = path.GetWinPathString();
 164                 int minlen = min(sPath.GetLength(), watched.GetLength());
 165                 int len = 0;
 166                 for (len = 0; len < minlen; ++len)
 167                 {
 168                         if (watched.GetAt(len) != sPath.GetAt(len))
 169                         {
 170                                 if ((len > 1)&&(len < minlen))
 171                                 {
 172                                         if (sPath.GetAt(len)=='\\')
 173                                         {
 174                                                 newroot = CTGitPath(sPath.Left(len));
 175                                         }
 176                                         else if (watched.GetAt(len)=='\\')
 177                                         {
 178                                                 newroot = CTGitPath(watched.Left(len));
 179                                         }
 180                                 }
 181                                 break;
 182                         }
 183                 }
 184                 if (len == minlen)
 185                 {
 186                         if (sPath.GetLength() == minlen)
 187                         {
 188                                 if (watched.GetLength() > minlen)
 189                                 {
 190                                         if (watched.GetAt(len)=='\\')
 191                                         {
 192                                                 newroot = path;
 193                                         }
 194                                         else if (sPath.GetLength() == 3 && sPath[1] == ':')
 195                                         {
 196                                                 newroot = path;
 197                                         }
 198                                 }
 199                         }
 200                         else
 201                         {
 202                                 if (sPath.GetLength() > minlen)
 203                                 {
 204                                         if (sPath.GetAt(len)=='\\')
 205                                         {
 206                                                 newroot = CTGitPath(watched);
 207                                         }
 208                                         else if (watched.GetLength() == 3 && watched[1] == ':')
 209                                         {
 210                                                 newroot = CTGitPath(watched);
 211                                         }
 212                                 }
 213                         }
 214                 }
 215         }
 216         if (!newroot.IsEmpty())
 217         {
 218                 CTraceToOutputDebugString::Instance()(_T(__FUNCTION__) _T(": add path to watch %s\n"), newroot.GetWinPath());
 219                 watchedPaths.AddPath(newroot);
 220                 watchedPaths.RemoveChildren();
 221                 if (bCloseInfoMap)
 222                         ClearInfoMap();
 223
 224                 return true;
 225         }
 226         CTraceToOutputDebugString::Instance()(_T(__FUNCTION__) _T(": add path to watch %s\n"), path.GetWinPath());
 227         watchedPaths.AddPath(path);
 228         if (bCloseInfoMap)
 229                 ClearInfoMap();
 230
 231         return true;
 232 }
 233
 234 bool CDirectoryWatcher::IsPathWatched(const CTGitPath& path)
 235 {
 236         AutoLocker lock(m_critSec);
 237         for (int i=0; i<watchedPaths.GetCount(); ++i)
 238         {
 239                 if (watchedPaths[i].IsAncestorOf(path))
 240                         return true;
 241         }
 242         return false;
 243 }
 244
 245 unsigned int CDirectoryWatcher::ThreadEntry(void* pContext)
 246 {
 247         ((CDirectoryWatcher*)pContext)->WorkerThread();
 248         return 0;
 249 }
 250
 251 void CDirectoryWatcher::WorkerThread()
 252 {
 253         DWORD numBytes;
 254         CDirWatchInfo * pdi = NULL;
 255         LPOVERLAPPED lpOverlapped;
 256         WCHAR buf[READ_DIR_CHANGE_BUFFER_SIZE] = {0};
 257         WCHAR * pFound = NULL;
 258         while (m_bRunning)
 259         {
 260                 CleanupWatchInfo();
 261                 if (!watchedPaths.IsEmpty())
 262                 {
 263                         // Any incoming notifications?
 264
 265                         pdi = NULL;
 266                         numBytes = 0;
 267                         InterlockedExchange(&m_bCleaned, FALSE);
 268                         if ((!m_hCompPort)
 269                                 || !GetQueuedCompletionStatus(m_hCompPort,
 270                                                                                           &numBytes,
 271                                                                                           (PULONG_PTR) &pdi,
 272                                                                                           &lpOverlapped,
 273                                                                                           600000 /*10 minutes*/))
 274                         {
 275                                 // No. Still trying?
 276
 277                                 if (!m_bRunning)
 278                                         return;
 279
 280                                 CTraceToOutputDebugString::Instance()(_T(__FUNCTION__) _T(": restarting watcher\n"));
 281                                 m_hCompPort.CloseHandle();
 282
 283                                 // We must sync the whole section because other threads may
 284                                 // receive "AddPath" calls that will delete the completion
 285                                 // port *while* we are adding references to it .
 286
 287                                 AutoLocker lock(m_critSec);
 288
 289                                 // Clear the list of watched objects and recreate that list.
 290                                 // This will also delete the old completion port
 291
 292                                 ClearInfoMap();
 293                                 CleanupWatchInfo();
 294
 295                                 for (int i=0; i<watchedPaths.GetCount(); ++i)
 296                                 {
 297                                         CTGitPath watchedPath = watchedPaths[i];
 298
 299                                         CAutoFile hDir = CreateFile(watchedPath.GetWinPath(),
 300                                                                                         FILE_LIST_DIRECTORY,
 301                                                                                         FILE_SHARE_READ | FILE_SHARE_WRITE | FILE_SHARE_DELETE,
 302                                                                                         NULL, //security attributes
 303                                                                                         OPEN_EXISTING,
 304                                                                                         FILE_FLAG_BACKUP_SEMANTICS | //required privileges: SE_BACKUP_NAME and SE_RESTORE_NAME.
 305                                                                                         FILE_FLAG_OVERLAPPED,
 306                                                                                         NULL);
 307                                         if (!hDir)
 308                                         {
 309                                                 // this could happen if a watched folder has been removed/renamed
 310                                                 CTraceToOutputDebugString::Instance()(_T(__FUNCTION__) _T(": CreateFile failed. Can't watch directory %s\n"), watchedPaths[i].GetWinPath());
 311                                                 watchedPaths.RemovePath(watchedPath);
 312                                                 break;
 313                                         }
 314
 315                                         DEV_BROADCAST_HANDLE NotificationFilter;
 316                                         SecureZeroMemory(&NotificationFilter, sizeof(NotificationFilter));
 317                                         NotificationFilter.dbch_size = sizeof(DEV_BROADCAST_HANDLE);
 318                                         NotificationFilter.dbch_devicetype = DBT_DEVTYP_HANDLE;
 319                                         NotificationFilter.dbch_handle = hDir;
 320                                         // RegisterDeviceNotification sends a message to the UI thread:
 321                                         // make sure we *can* send it and that the UI thread isn't waiting on a lock
 322                                         int numPaths = watchedPaths.GetCount();
 323                                         size_t numWatch = watchInfoMap.size();
 324                                         lock.Unlock();
 325                                         NotificationFilter.dbch_hdevnotify = RegisterDeviceNotification(hWnd, &NotificationFilter, DEVICE_NOTIFY_WINDOW_HANDLE);
 326                                         lock.Lock();
 327                                         // since we released the lock to prevent a deadlock with the UI thread,
 328                                         // it could happen that new paths were added to watch, or another thread
 329                                         // could have cleared our info map.
 330                                         // if that happened, we have to restart watching all paths again.
 331                                         if ((numPaths != watchedPaths.GetCount()) || (numWatch != watchInfoMap.size()))
 332                                         {
 333                                                 ClearInfoMap();
 334                                                 CleanupWatchInfo();
 335                                                 Sleep(200);
 336                                                 break;
 337                                         }
 338
 339                                         CDirWatchInfo * pDirInfo = new CDirWatchInfo(hDir, watchedPath);
 340                                         hDir.Detach();  // the new CDirWatchInfo object owns the handle now
 341                                         pDirInfo->m_hDevNotify = NotificationFilter.dbch_hdevnotify;
 342
 343
 344                                         HANDLE port = CreateIoCompletionPort(pDirInfo->m_hDir, m_hCompPort, (ULONG_PTR)pDirInfo, 0);
 345                                         if (port == NULL)
 346                                         {
 347                                                 CTraceToOutputDebugString::Instance()(_T(__FUNCTION__) _T(": CreateIoCompletionPort failed. Can't watch directory %s\n"), watchedPath.GetWinPath());
 348
 349                                                 // we must close the directory handle to allow ClearInfoMap()
 350                                                 // to close the completion port properly
 351                                                 pDirInfo->CloseDirectoryHandle();
 352
 353                                                 ClearInfoMap();
 354                                                 CleanupWatchInfo();
 355                                                 delete pDirInfo;
 356                                                 pDirInfo = NULL;
 357
 358                                                 watchedPaths.RemovePath(watchedPath);
 359                                                 break;
 360                                         }
 361                                         m_hCompPort = port;
 362
 363                                         if (!ReadDirectoryChangesW(pDirInfo->m_hDir,
 364                                                                                                 pDirInfo->m_Buffer,
 365                                                                                                 READ_DIR_CHANGE_BUFFER_SIZE,
 366                                                                                                 TRUE,
 367                                                                                                 FILE_NOTIFY_CHANGE_FILE_NAME | FILE_NOTIFY_CHANGE_DIR_NAME | FILE_NOTIFY_CHANGE_LAST_WRITE,
 368                                                                                                 &numBytes,// not used
 369                                                                                                 &pDirInfo->m_Overlapped,
 370                                                                                                 NULL))  //no completion routine!
 371                                         {
 372                                                 CTraceToOutputDebugString::Instance()(_T(__FUNCTION__) _T(": ReadDirectoryChangesW failed. Can't watch directory %s\n"), watchedPath.GetWinPath());
 373
 374                                                 // we must close the directory handle to allow ClearInfoMap()
 375                                                 // to close the completion port properly
 376                                                 pDirInfo->CloseDirectoryHandle();
 377
 378                                                 ClearInfoMap();
 379                                                 CleanupWatchInfo();
 380                                                 delete pDirInfo;
 381                                                 pDirInfo = NULL;
 382                                                 watchedPaths.RemovePath(watchedPath);
 383                                                 break;
 384                                         }
 385
 386                                         CTraceToOutputDebugString::Instance()(_T(__FUNCTION__) _T(": watching path %s\n"), pDirInfo->m_DirName.GetWinPath());
 387                                         watchInfoMap[pDirInfo->m_hDir] = pDirInfo;
 388                                 }
 389                         }
 390                         else
 391                         {
 392                                 if (!m_bRunning)
 393                                         return;
 394                                 if (watchInfoMap.empty())
 395                                         continue;
 396
 397                                 // NOTE: the longer this code takes to execute until ReadDirectoryChangesW
 398                                 // is called again, the higher the chance that we miss some
 399                                 // changes in the file system!
 400                                 if (pdi)
 401                                 {
 402                                         BOOL bRet = false;
 403                                         std::list<CTGitPath> notifyPaths;
 404                                         {
 405                                                 AutoLocker lock(m_critSec);
 406                                                 // in case the CDirectoryWatcher objects have been cleaned,
 407                                                 // the m_bCleaned variable will be set to true here. If the
 408                                                 // objects haven't been cleared, we can access them here.
 409                                                 if (InterlockedExchange(&m_bCleaned, FALSE))
 410                                                         continue;
 411                                                 if (   (!pdi->m_hDir) || watchInfoMap.empty()
 412                                                         || (watchInfoMap.find(pdi->m_hDir) == watchInfoMap.end()))
 413                                                 {
 414                                                         continue;
 415                                                 }
 416                                                 PFILE_NOTIFY_INFORMATION pnotify = (PFILE_NOTIFY_INFORMATION)pdi->m_Buffer;
 417                                                 DWORD nOffset = 0;
 418
 419                                                 do
 420                                                 {
 421                                                         pnotify = (PFILE_NOTIFY_INFORMATION)((LPBYTE)pnotify + nOffset);
 422
 423                                                         if ((ULONG_PTR)pnotify - (ULONG_PTR)pdi->m_Buffer > READ_DIR_CHANGE_BUFFER_SIZE)
 424                                                                 break;
 425
 426                                                         nOffset = pnotify->NextEntryOffset;
 427
 428                                                         if (pnotify->FileNameLength >= (READ_DIR_CHANGE_BUFFER_SIZE*sizeof(TCHAR)))
 429                                                                 continue;
 430
 431                                                         SecureZeroMemory(buf, READ_DIR_CHANGE_BUFFER_SIZE*sizeof(TCHAR));
 432                                                         _tcsncpy_s(buf, pdi->m_DirPath, _countof(buf) - 1);
 433                                                         errno_t err = _tcsncat_s(buf + pdi->m_DirPath.GetLength(), READ_DIR_CHANGE_BUFFER_SIZE-pdi->m_DirPath.GetLength(), pnotify->FileName, min(READ_DIR_CHANGE_BUFFER_SIZE-pdi->m_DirPath.GetLength(), pnotify->FileNameLength/sizeof(TCHAR)));
 434                                                         if (err == STRUNCATE)
 435                                                         {
 436                                                                 continue;
 437                                                         }
 438                                                         buf[(pnotify->FileNameLength/sizeof(TCHAR))+pdi->m_DirPath.GetLength()] = 0;
 439
 440                                                         if (m_FolderCrawler)
 441                                                         {
 442                                                                 if ((pFound = wcsstr(buf, L"\\tmp")) != NULL)
 443                                                                 {
 444                                                                         pFound += 4;
 445                                                                         if (((*pFound)=='\\')||((*pFound)=='\0'))
 446                                                                         {
 447                                                                                 continue;
 448                                                                         }
 449                                                                 }
 450                                                                 if ((pFound = wcsstr(buf, L":\\RECYCLER\\")) != NULL)
 451                                                                 {
 452                                                                         if ((pFound-buf) < 5)
 453                                                                         {
 454                                                                                 // a notification for the recycle bin - ignore it
 455                                                                                 continue;
 456                                                                         }
 457                                                                 }
 458                                                                 if ((pFound = wcsstr(buf, L":\\$Recycle.Bin\\")) != NULL)
 459                                                                 {
 460                                                                         if ((pFound-buf) < 5)
 461                                                                         {
 462                                                                                 // a notification for the recycle bin - ignore it
 463                                                                                 continue;
 464                                                                         }
 465                                                                 }
 466                                                                 if (wcsstr(buf, L".tmp") != NULL)
 467                                                                 {
 468                                                                         // assume files with a .tmp extension are not versioned and interesting,
 469                                                                         // so ignore them.
 470                                                                         continue;
 471                                                                 }
 472
 473                                                                 CTGitPath path;
 474                                                                 bool isIndex = false;
 475                                                                 if ((pFound = wcsstr(buf, L".git")) != NULL)
 476                                                                 {
 477                                                                         // omit repository data change except .git/index.lock- or .git/HEAD.lock-files
 478                                                                         if ((ULONG_PTR)pnotify - (ULONG_PTR)pdi->m_Buffer > READ_DIR_CHANGE_BUFFER_SIZE)
 479                                                                                 break;
 480
 481                                                                         path = g_AdminDirMap.GetWorkingCopy(CTGitPath(buf).GetContainingDirectory().GetWinPathString());
 482
 483                                                                         if ((wcsstr(pFound, L"index.lock") != NULL || wcsstr(pFound, L"HEAD.lock") != NULL) && pnotify->Action == FILE_ACTION_ADDED)
 484                                                                         {
 485                                                                                 CGitStatusCache::Instance().BlockPath(path);
 486                                                                                 continue;
 487                                                                         }
 488                                                                         else if (((wcsstr(pFound, L"index.lock") != NULL || wcsstr(pFound, L"HEAD.lock") != NULL) && pnotify->Action == FILE_ACTION_REMOVED) || (((wcsstr(pFound, L"index") != NULL && wcsstr(pFound, L"index.lock") == NULL) || (wcsstr(pFound, L"HEAD") != NULL && wcsstr(pFound, L"HEAD.lock") != NULL)) && pnotify->Action == FILE_ACTION_MODIFIED) || ((wcsstr(pFound, L"index.lock") == NULL || wcsstr(pFound, L"HEAD.lock") != NULL) && pnotify->Action == FILE_ACTION_RENAMED_NEW_NAME))
 489                                                                         {
 490                                                                                 isIndex = true;
 491                                                                                 CGitStatusCache::Instance().BlockPath(path, 1);
 492                                                                         }
 493                                                                         else
 494                                                                         {
 495                                                                                 continue;
 496                                                                         }
 497                                                                 }
 498                                                                 else
 499                                                                         path.SetFromUnknown(buf);
 500
 501                                                                 if(!path.HasAdminDir() && !isIndex)
 502                                                                         continue;
 503
 504                                                                 CTraceToOutputDebugString::Instance()(_T(__FUNCTION__) _T(": change notification for %s\n"), buf);
 505                                                                 notifyPaths.push_back(path);
 506                                                         }
 507                                                 } while ((nOffset > 0)&&(nOffset < READ_DIR_CHANGE_BUFFER_SIZE));
 508
 509                                                 // setup next notification cycle
 510                                                 SecureZeroMemory (pdi->m_Buffer, sizeof(pdi->m_Buffer));
 511                                                 SecureZeroMemory (&pdi->m_Overlapped, sizeof(OVERLAPPED));
 512                                                 bRet = ReadDirectoryChangesW(pdi->m_hDir,
 513                                                         pdi->m_Buffer,
 514                                                         READ_DIR_CHANGE_BUFFER_SIZE,
 515                                                         TRUE,
 516                                                         FILE_NOTIFY_CHANGE_FILE_NAME | FILE_NOTIFY_CHANGE_DIR_NAME | FILE_NOTIFY_CHANGE_LAST_WRITE,
 517                                                         &numBytes,// not used
 518                                                         &pdi->m_Overlapped,
 519                                                         NULL); //no completion routine!
 520                                         }
 521                                         if (!notifyPaths.empty())
 522                                         {
 523                                                 for (std::list<CTGitPath>::const_iterator nit = notifyPaths.begin(); nit != notifyPaths.end(); ++nit)
 524                                                 {
 525                                                         m_FolderCrawler->AddPathForUpdate(*nit);
 526                                                 }
 527                                         }
 528
 529                                         // any clean-up to do?
 530
 531                                         CleanupWatchInfo();
 532
 533                                         if (!bRet)
 534                                         {
 535                                                 // Since the call to ReadDirectoryChangesW failed, just
 536                                                 // wait a while. We don't want to have this thread
 537                                                 // running using 100% CPU if something goes completely
 538                                                 // wrong.
 539                                                 Sleep(200);
 540                                         }
 541                                 }
 542                         }
 543                 }// if (!watchedPaths.IsEmpty())
 544                 else
 545                         Sleep(200);
 546         }// while (m_bRunning)
 547 }
 548
 549 // call this before destroying async I/O structures:
 550
 551 void CDirectoryWatcher::CloseWatchHandles()
 552 {
 553         AutoLocker lock(m_critSec);
 554
 555         for (TInfoMap::iterator I = watchInfoMap.begin(); I != watchInfoMap.end(); ++I)
 556                 if (I->second)
 557                         I->second->CloseDirectoryHandle();
 558
 559         CloseCompletionPort();
 560 }
 561
 562 void CDirectoryWatcher::ClearInfoMap()
 563 {
 564         CloseWatchHandles();
 565         if (!watchInfoMap.empty())
 566         {
 567                 AutoLocker lock(m_critSec);
 568                 for (TInfoMap::iterator I = watchInfoMap.begin(); I != watchInfoMap.end(); ++I)
 569                 {
 570                         CDirectoryWatcher::CDirWatchInfo * info = I->second;
 571                         I->second = NULL;
 572                         ScheduleForDeletion (info);
 573                 }
 574                 watchInfoMap.clear();
 575         }
 576 }
 577
 578 CTGitPath CDirectoryWatcher::CloseInfoMap(HANDLE hDir)
 579 {
 580         CTGitPath path;
 581         AutoLocker lock(m_critSec);
 582         TInfoMap::const_iterator d = watchInfoMap.find(hDir);
 583         if (d != watchInfoMap.end())
 584         {
 585                 path = CTGitPath(CTGitPath(d->second->m_DirPath).GetRootPathString());
 586                 RemovePathAndChildren(path);
 587                 BlockPath(path);
 588         }
 589         CloseWatchHandles();
 590
 591         if (watchInfoMap.empty())
 592                 return path;
 593
 594         for (TInfoMap::iterator I = watchInfoMap.begin(); I != watchInfoMap.end(); ++I)
 595         {
 596                 CDirectoryWatcher::CDirWatchInfo * info = I->second;
 597
 598                 ScheduleForDeletion (info);
 599         }
 600         watchInfoMap.clear();
 601
 602         return path;
 603 }
 604
 605 bool CDirectoryWatcher::CloseHandlesForPath(const CTGitPath& path)
 606 {
 607         AutoLocker lock(m_critSec);
 608         CloseWatchHandles();
 609
 610         if (watchInfoMap.empty())
 611                 return false;
 612
 613         for (TInfoMap::iterator I = watchInfoMap.begin(); I != watchInfoMap.end(); ++I)
 614         {
 615                 CDirectoryWatcher::CDirWatchInfo * info = I->second;
 616                 I->second = NULL;
 617                 CTGitPath p = CTGitPath(info->m_DirPath);
 618                 if (path.IsAncestorOf(p))
 619                 {
 620                         RemovePathAndChildren(p);
 621                         BlockPath(p);
 622                 }
 623                 ScheduleForDeletion(info);
 624         }
 625         watchInfoMap.clear();
 626         return true;
 627 }
 628
 629 CDirectoryWatcher::CDirWatchInfo::CDirWatchInfo(HANDLE hDir, const CTGitPath& DirectoryName)
 630         : m_hDir(hDir)
 631         , m_DirName(DirectoryName)
 632 {
 633         ATLASSERT(hDir && !DirectoryName.IsEmpty());
 634         m_Buffer[0] = 0;
 635         SecureZeroMemory(&m_Overlapped, sizeof(m_Overlapped));
 636         m_DirPath = m_DirName.GetWinPathString();
 637         if (m_DirPath.GetAt(m_DirPath.GetLength()-1) != '\\')
 638                 m_DirPath += _T("\\");
 639         m_hDevNotify = NULL;
 640 }
 641
 642 CDirectoryWatcher::CDirWatchInfo::~CDirWatchInfo()
 643 {
 644         CloseDirectoryHandle();
 645 }
 646
 647 bool CDirectoryWatcher::CDirWatchInfo::CloseDirectoryHandle()
 648 {
 649         bool b = m_hDir.CloseHandle();
 650
 651         if (m_hDevNotify)
 652         {
 653                 UnregisterDeviceNotification(m_hDevNotify);
 654                 m_hDevNotify = NULL;
 655         }
 656         return b;
 657 }
 658