bool CRemoteCacheLink::EnsureCommandPipeOpen()
{
AutoLocker lock(m_critSec);
if(m_hCommandPipe != INVALID_HANDLE_VALUE)
{
return true;
}
m_hCommandPipe = CreateFile(
GetCacheCommandPipeName(), // pipe name
GENERIC_READ | // read and write access
GENERIC_WRITE,
0, // no sharing
NULL, // default security attributes
OPEN_EXISTING, // opens existing pipe
FILE_FLAG_OVERLAPPED, // default attributes
NULL); // no template file
if (m_hCommandPipe == INVALID_HANDLE_VALUE && GetLastError() == ERROR_PIPE_BUSY)
{
// TSVNCache is running but is busy connecting a different client.
// Do not give up immediately but wait for a few milliseconds until
// the server has created the next pipe instance
if (WaitNamedPipe(GetCacheCommandPipeName(), 50))
{
m_hCommandPipe = CreateFile(
GetCacheCommandPipeName(), // pipe name
GENERIC_READ | // read and write access
GENERIC_WRITE,
0, // no sharing
NULL, // default security attributes
OPEN_EXISTING, // opens existing pipe
FILE_FLAG_OVERLAPPED, // default attributes
NULL); // no template file
}
}
if (m_hCommandPipe != INVALID_HANDLE_VALUE)
{
// The pipe connected; change to message-read mode.
DWORD dwMode;
dwMode = PIPE_READMODE_MESSAGE;
if(!SetNamedPipeHandleState(
m_hCommandPipe, // pipe handle
&dwMode, // new pipe mode
NULL, // don't set maximum bytes
NULL)) // don't set maximum time
{
ATLTRACE("SetNamedPipeHandleState failed");
CloseHandle(m_hCommandPipe);
m_hCommandPipe = INVALID_HANDLE_VALUE;
return false;
}
return true;
}
return false;
}
void CSettings::HandleRestart()
{
int restart = ISettingsPropPage::Restart_None;
restart |= m_pMainPage->GetRestart();
restart |= m_pOverlayPage->GetRestart();
restart |= m_pOverlaysPage->GetRestart();
restart |= m_pOverlayHandlersPage->GetRestart();
restart |= m_pProxyPage->GetRestart();
restart |= m_pProgsDiffPage->GetRestart();
restart |= m_pProgsMergePage->GetRestart();
restart |= m_pProgsAlternativeEditor->GetRestart();
restart |= m_pLookAndFeelPage->GetRestart();
restart |= m_pDialogsPage->GetRestart();
restart |= m_pColorsPage->GetRestart();
restart |= m_pColorsPage2->GetRestart();
restart |= m_pColorsPage3->GetRestart();
restart |= m_pSavedPage->GetRestart();
restart |= m_pHooksPage->GetRestart();
restart |= m_pBugTraqPage->GetRestart();
restart |= m_pTBlamePage->GetRestart();
restart |= m_pGitConfig->GetRestart();
restart |= m_pGitRemote->GetRestart();
restart |= m_pBugTraqPage->GetRestart();
restart |= m_pExtMenu->GetRestart();
restart |= m_pAdvanced->GetRestart();
if (restart & ISettingsPropPage::Restart_System)
{
DWORD_PTR res = 0;
::SendMessageTimeout(HWND_BROADCAST, WM_SETTINGCHANGE, 0, 0, SMTO_ABORTIFHUNG, 20, &res);
CMessageBox::Show(NULL, IDS_SETTINGS_RESTARTSYSTEM, IDS_APPNAME, MB_ICONINFORMATION);
}
if (restart & ISettingsPropPage::Restart_Cache)
{
DWORD_PTR res = 0;
::SendMessageTimeout(HWND_BROADCAST, WM_SETTINGCHANGE, 0, 0, SMTO_ABORTIFHUNG, 20, &res);
// tell the cache to refresh everything
HANDLE hPipe = CreateFile(
GetCacheCommandPipeName(), // pipe name
GENERIC_READ | // read and write access
GENERIC_WRITE,
0, // no sharing
NULL, // default security attributes
OPEN_EXISTING, // opens existing pipe
FILE_FLAG_OVERLAPPED, // default attributes
NULL); // no template file
if (hPipe != INVALID_HANDLE_VALUE)
{
// The pipe connected; change to message-read mode.
DWORD dwMode;
dwMode = PIPE_READMODE_MESSAGE;
if (SetNamedPipeHandleState(
hPipe, // pipe handle
&dwMode, // new pipe mode
NULL, // don't set maximum bytes
NULL)) // don't set maximum time
{
DWORD cbWritten;
TGITCacheCommand cmd;
SecureZeroMemory(&cmd, sizeof(TGITCacheCommand));
cmd.command = TGITCACHECOMMAND_REFRESHALL;
BOOL fSuccess = WriteFile(
hPipe, // handle to pipe
&cmd, // buffer to write from
sizeof(cmd), // number of bytes to write
&cbWritten, // number of bytes written
NULL); // not overlapped I/O
if (! fSuccess || sizeof(cmd) != cbWritten)
{
DisconnectNamedPipe(hPipe);
CloseHandle(hPipe);
hPipe = INVALID_HANDLE_VALUE;
}
if (hPipe != INVALID_HANDLE_VALUE)
{
// now tell the cache we don't need it's command thread anymore
DWORD cbWritten;
TGITCacheCommand cmd;
SecureZeroMemory(&cmd, sizeof(TGITCacheCommand));
cmd.command = TGITCACHECOMMAND_END;
WriteFile(
hPipe, // handle to pipe
&cmd, // buffer to write from
sizeof(cmd), // number of bytes to write
&cbWritten, // number of bytes written
NULL); // not overlapped I/O
DisconnectNamedPipe(hPipe);
CloseHandle(hPipe);
hPipe = INVALID_HANDLE_VALUE;
}
}
else
{
ATLTRACE("SetNamedPipeHandleState failed");
CloseHandle(hPipe);
}
}
}
}
void CCacheDlg::RemoveFromCache(const CString& path)
{
// if we use the external cache, we tell the cache directly that something
// has changed, without the detour via the shell.
HANDLE hPipe = CreateFile(
GetCacheCommandPipeName(), // pipe name
GENERIC_READ | // read and write access
GENERIC_WRITE,
0, // no sharing
nullptr, // default security attributes
OPEN_EXISTING, // opens existing pipe
FILE_FLAG_OVERLAPPED, // default attributes
nullptr); // no template file
if (hPipe != INVALID_HANDLE_VALUE)
{
// The pipe connected; change to message-read mode.
DWORD dwMode;
dwMode = PIPE_READMODE_MESSAGE;
if(SetNamedPipeHandleState(
hPipe, // pipe handle
&dwMode, // new pipe mode
NULL, // don't set maximum bytes
NULL)) // don't set maximum time
{
DWORD cbWritten;
TGITCacheCommand cmd;
cmd.command = TGITCACHECOMMAND_CRAWL;
wcsncpy_s(cmd.path, path, MAX_PATH);
BOOL fSuccess = WriteFile(
hPipe, // handle to pipe
&cmd, // buffer to write from
sizeof(cmd), // number of bytes to write
&cbWritten, // number of bytes written
NULL); // not overlapped I/O
if (! fSuccess || sizeof(cmd) != cbWritten)
{
DisconnectNamedPipe(hPipe);
CloseHandle(hPipe);
hPipe = INVALID_HANDLE_VALUE;
}
if (hPipe != INVALID_HANDLE_VALUE)
{
// now tell the cache we don't need it's command thread anymore
DWORD cbWritten2;
TGITCacheCommand cmd2;
cmd2.command = TGITCACHECOMMAND_END;
WriteFile(
hPipe, // handle to pipe
&cmd2, // buffer to write from
sizeof(cmd2), // number of bytes to write
&cbWritten2, // number of bytes written
NULL); // not overlapped I/O
DisconnectNamedPipe(hPipe);
CloseHandle(hPipe);
hPipe = INVALID_HANDLE_VALUE;
}
}
else
{
ATLTRACE("SetNamedPipeHandleState failed");
CloseHandle(hPipe);
}
}
}
void CShellUpdater::UpdateShell()
{
// Tell the shell extension to purge its cache
CTraceToOutputDebugString::Instance()(__FUNCTION__ ": Setting cache invalidation event %I64u\n", GetTickCount64());
SetEvent(m_hInvalidationEvent);
// We use the SVN 'notify' call-back to add items to the list
// Because this might call-back more than once per file (for example, when committing)
// it's possible that there may be duplicates in the list.
// There's no point asking the shell to do more than it has to, so we remove the duplicates before
// passing the list on
m_pathsForUpdating.RemoveDuplicates();
// if we use the external cache, we tell the cache directly that something
// has changed, without the detour via the shell.
CAutoFile hPipe = CreateFile(
GetCacheCommandPipeName(), // pipe name
GENERIC_READ | // read and write access
GENERIC_WRITE,
0, // no sharing
NULL, // default security attributes
OPEN_EXISTING, // opens existing pipe
FILE_FLAG_OVERLAPPED, // default attributes
NULL); // no template file
if (!hPipe)
return;
// The pipe connected; change to message-read mode.
DWORD dwMode = PIPE_READMODE_MESSAGE;
if(SetNamedPipeHandleState(
hPipe, // pipe handle
&dwMode, // new pipe mode
NULL, // don't set maximum bytes
NULL) == 0) // don't set maximum time
{
CTraceToOutputDebugString::Instance()(__FUNCTION__ ": SetNamedPipeHandleState failed");
return;
}
for(int nPath = 0; nPath < m_pathsForUpdating.GetCount(); nPath++)
{
CTraceToOutputDebugString::Instance()(_T(__FUNCTION__) L": Cache Item Update for %s (%I64u)\n", m_pathsForUpdating[nPath].GetDirectory().GetWinPath(), GetTickCount64());
if (!m_pathsForUpdating[nPath].IsDirectory())
{
// send notifications to the shell for changed files - folders are updated by the cache itself.
SHChangeNotify(SHCNE_UPDATEITEM, SHCNF_PATH | SHCNF_FLUSHNOWAIT, m_pathsForUpdating[nPath].GetWinPath(), NULL);
}
TSVNCacheCommand cmd;
cmd.command = TSVNCACHECOMMAND_CRAWL;
wcsncpy_s(cmd.path, m_pathsForUpdating[nPath].GetDirectory().GetWinPath(), _countof(cmd.path)-1);
DWORD cbWritten;
BOOL fSuccess = WriteFile(
hPipe, // handle to pipe
&cmd, // buffer to write from
sizeof(cmd), // number of bytes to write
&cbWritten, // number of bytes written
NULL); // not overlapped I/O
if (! fSuccess || sizeof(cmd) != cbWritten)
{
DisconnectNamedPipe(hPipe);
return;
}
}
// now tell the cache we don't need it's command thread anymore
TSVNCacheCommand cmd;
cmd.command = TSVNCACHECOMMAND_END;
DWORD cbWritten;
WriteFile(
hPipe, // handle to pipe
&cmd, // buffer to write from
sizeof(cmd), // number of bytes to write
&cbWritten, // number of bytes written
NULL); // not overlapped I/O
DisconnectNamedPipe(hPipe);
}
bool SendCacheCommand(BYTE command, const WCHAR * path /* = NULL */)
{
int retrycount = 2;
CAutoFile hPipe;
do
{
hPipe = CreateFile(
GetCacheCommandPipeName(), // pipe name
GENERIC_READ | // read and write access
GENERIC_WRITE,
0, // no sharing
NULL, // default security attributes
OPEN_EXISTING, // opens existing pipe
FILE_FLAG_OVERLAPPED, // default attributes
NULL); // no template file
retrycount--;
if (!hPipe)
Sleep(10);
} while ((!hPipe) && (retrycount));
if (!hPipe)
{
CTraceToOutputDebugString::Instance()(__FUNCTION__ ": Could not connect to pipe\n");
return false;
}
// The pipe connected; change to message-read mode.
DWORD dwMode = PIPE_READMODE_MESSAGE;
if (SetNamedPipeHandleState(
hPipe, // pipe handle
&dwMode, // new pipe mode
NULL, // don't set maximum bytes
NULL)) // don't set maximum time
{
DWORD cbWritten;
TSVNCacheCommand cmd;
SecureZeroMemory(&cmd, sizeof(TSVNCacheCommand));
cmd.command = command;
if (path)
_tcsncpy_s(cmd.path, path, _TRUNCATE);
retrycount = 2;
BOOL fSuccess = FALSE;
do
{
fSuccess = WriteFile(
hPipe, // handle to pipe
&cmd, // buffer to write from
sizeof(cmd), // number of bytes to write
&cbWritten, // number of bytes written
NULL); // not overlapped I/O
retrycount--;
if (! fSuccess || sizeof(cmd) != cbWritten)
Sleep(10);
} while ((retrycount) && (! fSuccess || sizeof(cmd) != cbWritten));
if (! fSuccess || sizeof(cmd) != cbWritten)
{
CTraceToOutputDebugString::Instance()(__FUNCTION__ ": Could not write to pipe\n");
DisconnectNamedPipe(hPipe);
return false;
}
// now tell the cache we don't need it's command thread anymore
SecureZeroMemory(&cmd, sizeof(TSVNCacheCommand));
cmd.command = TSVNCACHECOMMAND_END;
WriteFile(
hPipe, // handle to pipe
&cmd, // buffer to write from
sizeof(cmd), // number of bytes to write
&cbWritten, // number of bytes written
NULL); // not overlapped I/O
DisconnectNamedPipe(hPipe);
}
else
{
CTraceToOutputDebugString::Instance()(__FUNCTION__ ": SetNamedPipeHandleState failed");
return false;
}
return true;
}
DWORD WINAPI CommandWaitThread(LPVOID lpvParam)
{
ATLTRACE("CommandWaitThread started\n");
bool * bRun = (bool *)lpvParam;
// The main loop creates an instance of the named pipe and
// then waits for a client to connect to it. When the client
// connects, a thread is created to handle communications
// with that client, and the loop is repeated.
DWORD dwThreadId;
BOOL fConnected;
CAutoFile hPipe;
while (*bRun)
{
hPipe = CreateNamedPipe(
GetCacheCommandPipeName(),
PIPE_ACCESS_DUPLEX, // read/write access
PIPE_TYPE_MESSAGE | // message type pipe
PIPE_READMODE_MESSAGE | // message-read mode
PIPE_WAIT, // blocking mode
PIPE_UNLIMITED_INSTANCES, // max. instances
BUFSIZE, // output buffer size
BUFSIZE, // input buffer size
NMPWAIT_USE_DEFAULT_WAIT, // client time-out
NULL); // NULL DACL
if (!hPipe)
{
//OutputDebugStringA("TSVNCache: CreatePipe failed\n");
//DebugOutputLastError();
if (*bRun)
Sleep(200);
continue; // never leave the thread!
}
// Wait for the client to connect; if it succeeds,
// the function returns a nonzero value. If the function returns
// zero, GetLastError returns ERROR_PIPE_CONNECTED.
fConnected = ConnectNamedPipe(hPipe, NULL) ? TRUE : (GetLastError() == ERROR_PIPE_CONNECTED);
if (fConnected)
{
// Create a thread for this client.
CAutoGeneralHandle hCommandThread = CreateThread(
NULL, // no security attribute
0, // default stack size
CommandThread,
(HANDLE) hPipe, // thread parameter
0, // not suspended
&dwThreadId); // returns thread ID
if (!hCommandThread)
{
//OutputDebugStringA("TSVNCache: Could not create Command thread\n");
//DebugOutputLastError();
DisconnectNamedPipe(hPipe);
hPipe.CloseHandle();
// since we're now closing this thread, we also have to close the whole application!
// otherwise the thread is dead, but the app is still running, refusing new instances
// but no pipe will be available anymore.
PostMessage(hWnd, WM_CLOSE, 0, 0);
return 1;
}
// detach the handle, since we passed it to the thread
hPipe.Detach();
}
else
{
// The client could not connect, so close the pipe.
//OutputDebugStringA("TSVNCache: ConnectNamedPipe failed\n");
//DebugOutputLastError();
hPipe.CloseHandle();
if (*bRun)
Sleep(200);
continue; // don't end the thread!
}
}
ATLTRACE("CommandWait thread exited\n");
return 0;
}
bool CRemoteCacheLink::EnsureCommandPipeOpen()
{
AutoLocker lock(m_critSec);
return InternalEnsurePipeOpen (m_hCommandPipe, GetCacheCommandPipeName());
}
bool SendCacheCommand(BYTE command, const WCHAR* path /* = nullptr */)
{
CAutoFile hPipe;
CString pipeName = GetCacheCommandPipeName();
for (int retry = 0; retry < 2; ++retry)
{
if (retry > 0)
WaitNamedPipe(pipeName, 50);
hPipe = CreateFile(
pipeName, // pipe name
GENERIC_READ | // read and write access
GENERIC_WRITE,
0, // no sharing
nullptr, // default security attributes
OPEN_EXISTING, // opens existing pipe
FILE_FLAG_OVERLAPPED, // default attributes
nullptr); // no template file
if (!hPipe && GetLastError() == ERROR_PIPE_BUSY)
{
// TGitCache is running but is busy connecting a different client.
// Do not give up immediately but wait for a few milliseconds until
// the server has created the next pipe instance
continue;
}
break;
}
if (!hPipe)
{
CTraceToOutputDebugString::Instance()(__FUNCTION__ ": Could not connect to pipe\n");
return false;
}
// The pipe connected; change to message-read mode.
DWORD dwMode = PIPE_READMODE_MESSAGE;
if (SetNamedPipeHandleState(
hPipe, // pipe handle
&dwMode, // new pipe mode
nullptr, // don't set maximum bytes
nullptr)) // don't set maximum time
{
DWORD cbWritten;
TGITCacheCommand cmd = { 0 };
cmd.command = command;
if (path)
wcsncpy_s(cmd.path, path, _TRUNCATE);
int retrycount = 2;
BOOL fSuccess = FALSE;
do
{
fSuccess = WriteFile(
hPipe, // handle to pipe
&cmd, // buffer to write from
sizeof(cmd), // number of bytes to write
&cbWritten, // number of bytes written
nullptr); // not overlapped I/O
retrycount--;
if (! fSuccess || sizeof(cmd) != cbWritten)
Sleep(10);
} while ((retrycount) && (! fSuccess || sizeof(cmd) != cbWritten));
if (! fSuccess || sizeof(cmd) != cbWritten)
{
CTraceToOutputDebugString::Instance()(__FUNCTION__ ": Could not write to pipe\n");
DisconnectNamedPipe(hPipe);
return false;
}
// now tell the cache we don't need it's command thread anymore
SecureZeroMemory(&cmd, sizeof(TGITCacheCommand));
cmd.command = TGITCACHECOMMAND_END;
WriteFile(
hPipe, // handle to pipe
&cmd, // buffer to write from
sizeof(cmd), // number of bytes to write
&cbWritten, // number of bytes written
nullptr); // not overlapped I/O
DisconnectNamedPipe(hPipe);
}
else
{
CTraceToOutputDebugString::Instance()(__FUNCTION__ ": SetNamedPipeHandleState failed");
return false;
}
return true;
}
void CShellUpdater::UpdateShell()
{
// Tell the shell extension to purge its cache
ATLTRACE("Setting cache invalidation event %d\n", GetTickCount());
SetEvent(m_hInvalidationEvent);
// We use the SVN 'notify' call-back to add items to the list
// Because this might call-back more than once per file (for example, when committing)
// it's possible that there may be duplicates in the list.
// There's no point asking the shell to do more than it has to, so we remove the duplicates before
// passing the list on
m_pathsForUpdating.RemoveDuplicates();
// if we use the external cache, we tell the cache directly that something
// has changed, without the detour via the shell.
HANDLE hPipe = CreateFile(
GetCacheCommandPipeName(), // pipe name
GENERIC_READ | // read and write access
GENERIC_WRITE,
0, // no sharing
NULL, // default security attributes
OPEN_EXISTING, // opens existing pipe
FILE_FLAG_OVERLAPPED, // default attributes
NULL); // no template file
if (hPipe != INVALID_HANDLE_VALUE)
{
// The pipe connected; change to message-read mode.
DWORD dwMode;
dwMode = PIPE_READMODE_MESSAGE;
if(SetNamedPipeHandleState(
hPipe, // pipe handle
&dwMode, // new pipe mode
NULL, // don't set maximum bytes
NULL)) // don't set maximum time
{
CTGitPath path;
for(int nPath = 0; nPath < m_pathsForUpdating.GetCount(); nPath++)
{
path.SetFromWin(g_Git.m_CurrentDir+_T("\\")+m_pathsForUpdating[nPath].GetWinPathString());
ATLTRACE(_T("Cache Item Update for %s (%d)\n"), path.GetWinPathString(), GetTickCount());
if (!path.IsDirectory())
{
// send notifications to the shell for changed files - folders are updated by the cache itself.
SHChangeNotify(SHCNE_UPDATEITEM, SHCNF_PATH | SHCNF_FLUSHNOWAIT, path.GetWinPath(), NULL);
}
DWORD cbWritten;
TSVNCacheCommand cmd;
cmd.command = TSVNCACHECOMMAND_CRAWL;
wcsncpy_s(cmd.path, MAX_PATH+1, path.GetDirectory().GetWinPath(), MAX_PATH);
BOOL fSuccess = WriteFile(
hPipe, // handle to pipe
&cmd, // buffer to write from
sizeof(cmd), // number of bytes to write
&cbWritten, // number of bytes written
NULL); // not overlapped I/O
if (! fSuccess || sizeof(cmd) != cbWritten)
{
DisconnectNamedPipe(hPipe);
CloseHandle(hPipe);
hPipe = INVALID_HANDLE_VALUE;
break;
}
}
if (hPipe != INVALID_HANDLE_VALUE)
{
// now tell the cache we don't need it's command thread anymore
DWORD cbWritten;
TSVNCacheCommand cmd;
cmd.command = TSVNCACHECOMMAND_END;
WriteFile(
hPipe, // handle to pipe
&cmd, // buffer to write from
sizeof(cmd), // number of bytes to write
&cbWritten, // number of bytes written
NULL); // not overlapped I/O
DisconnectNamedPipe(hPipe);
CloseHandle(hPipe);
hPipe = INVALID_HANDLE_VALUE;
}
}
else
{
ATLTRACE("SetNamedPipeHandleState failed");
CloseHandle(hPipe);
}
}
}
