diff options
Diffstat (limited to 'win/tclWinSock.c')
| -rw-r--r-- | win/tclWinSock.c | 123 |
1 files changed, 68 insertions, 55 deletions
diff --git a/win/tclWinSock.c b/win/tclWinSock.c index 509df69..553f4a2 100644 --- a/win/tclWinSock.c +++ b/win/tclWinSock.c @@ -8,7 +8,7 @@ * See the file "license.terms" for information on usage and redistribution of * this file, and for a DISCLAIMER OF ALL WARRANTIES. * - * RCS: @(#) $Id: tclWinSock.c,v 1.51 2005/12/13 22:43:18 kennykb Exp $ + * RCS: @(#) $Id: tclWinSock.c,v 1.52 2006/03/10 17:34:35 vasiljevic Exp $ */ #include "tclWinInt.h" @@ -249,7 +249,6 @@ static void TcpThreadActionProc(ClientData instanceData, static Tcl_EventCheckProc SocketCheckProc; static Tcl_EventProc SocketEventProc; static Tcl_EventSetupProc SocketSetupProc; -static Tcl_ExitProc SocketThreadExitHandler; static Tcl_DriverBlockModeProc TcpBlockProc; static Tcl_DriverCloseProc TcpCloseProc; static Tcl_DriverSetOptionProc TcpSetOptionProc; @@ -292,7 +291,7 @@ static Tcl_ChannelType tcpChannelType = { * and set up the winSock function table. If successful, registers the * event window for the socket notifier code. * - * Assumes Mutex is held. + * Assumes socketMutex is held. * * Results: * None. @@ -477,43 +476,41 @@ InitSockets(void) if (tsdPtr == NULL) { tsdPtr = TCL_TSD_INIT(&dataKey); tsdPtr->socketList = NULL; - tsdPtr->hwnd = NULL; - - tsdPtr->threadId = Tcl_GetCurrentThread(); - + tsdPtr->hwnd = NULL; + tsdPtr->threadId = Tcl_GetCurrentThread(); tsdPtr->readyEvent = CreateEvent(NULL, FALSE, FALSE, NULL); + if (tsdPtr->readyEvent == NULL) { + goto unloadLibrary; + } tsdPtr->socketListLock = CreateEvent(NULL, FALSE, TRUE, NULL); + if (tsdPtr->socketListLock == NULL) { + goto unloadLibrary; + } tsdPtr->socketThread = CreateThread(NULL, 256, SocketThread, tsdPtr, 0, &id); - SetThreadPriority(tsdPtr->socketThread, THREAD_PRIORITY_HIGHEST); - if (tsdPtr->socketThread == NULL) { goto unloadLibrary; } + SetThreadPriority(tsdPtr->socketThread, THREAD_PRIORITY_HIGHEST); /* - * Wait for the thread to signal that the window has been created and - * is ready to go. Timeout after twenty seconds. + * Wait for the thread to signal when the window has + * been created and if it is ready to go. */ - if (WaitForSingleObject(tsdPtr->readyEvent, 20000) == WAIT_TIMEOUT) { - goto unloadLibrary; - } + WaitForSingleObject(tsdPtr->readyEvent, INFINITE); if (tsdPtr->hwnd == NULL) { - goto unloadLibrary; + goto unloadLibrary; /* Trouble creating the window */ } Tcl_CreateEventSource(SocketSetupProc, SocketCheckProc, NULL); - Tcl_CreateThreadExitHandler(SocketThreadExitHandler, NULL); } return; unloadLibrary: - if (tsdPtr != NULL && tsdPtr->hwnd != NULL) { - SocketThreadExitHandler(0); - } + TclpFinalizeSockets(); FreeLibrary(winSock.hModule); winSock.hModule = NULL; return; @@ -571,12 +568,13 @@ SocketExitHandler( { Tcl_MutexLock(&socketMutex); if (winSock.hModule) { + /* * Make sure the socket event handling window is cleaned-up for, at * most, this thread. */ - SocketThreadExitHandler(clientData); + TclpFinalizeSockets(); UnregisterClass("TclSocket", TclWinGetTclInstance()); winSock.WSACleanup(); FreeLibrary(winSock.hModule); @@ -589,50 +587,50 @@ SocketExitHandler( /* *---------------------------------------------------------------------- * - * SocketThreadExitHandler -- + * TclpFinalizeSockets -- * - * Callback invoked during thread clean up to delete the socket event - * source. + * This function is called from Tcl_FinalizeThread to finalize + * the platform specific socket subsystem. + * Also, it may be called from within this module to cleanup + * the state if unable to initialize the sockets subsystem. * * Results: * None. * * Side effects: - * Delete the event source. + * Deletes the event source and destroys the socket thread. * *---------------------------------------------------------------------- */ - /* ARGSUSED */ -static void -SocketThreadExitHandler( - ClientData clientData) /* Not used. */ +void +TclpFinalizeSockets() { - ThreadSpecificData *tsdPtr = - (ThreadSpecificData *)TclThreadDataKeyGet(&dataKey); - - if (tsdPtr != NULL && tsdPtr->socketThread != NULL) { - DWORD exitCode; - - GetExitCodeThread(tsdPtr->socketThread, &exitCode); - if (exitCode == STILL_ACTIVE) { - PostMessage(tsdPtr->hwnd, SOCKET_TERMINATE, 0, 0); - - /* - * Wait for the thread to close. This ensures that we are - * completely cleaned up before we leave this function. If - * Tcl_Finalize was called from DllMain, the thread is in a paused - * state so we need to timeout and continue. - */ + ThreadSpecificData *tsdPtr; - WaitForSingleObject(tsdPtr->socketThread, 100); + tsdPtr = (ThreadSpecificData *)TclThreadDataKeyGet(&dataKey); + if (tsdPtr != NULL) { + if (tsdPtr->socketThread != NULL) { + if (tsdPtr->hwnd != NULL) { + PostMessage(tsdPtr->hwnd, SOCKET_TERMINATE, 0, 0); + /* + * Wait for the thread to exit. This ensures that we are + * completely cleaned up before we leave this function. + */ + WaitForSingleObject(tsdPtr->readyEvent, INFINITE); + tsdPtr->hwnd = NULL; + } + CloseHandle(tsdPtr->socketThread); + tsdPtr->socketThread = NULL; + } + if (tsdPtr->readyEvent != NULL) { + CloseHandle(tsdPtr->readyEvent); + tsdPtr->readyEvent = NULL; + } + if (tsdPtr->socketListLock != NULL) { + CloseHandle(tsdPtr->socketListLock); + tsdPtr->socketListLock = NULL; } - CloseHandle(tsdPtr->socketThread); - tsdPtr->socketThread = NULL; - CloseHandle(tsdPtr->readyEvent); - CloseHandle(tsdPtr->socketListLock); - - Tcl_DeleteThreadExitHandler(SocketThreadExitHandler, NULL); Tcl_DeleteEventSource(SocketSetupProc, SocketCheckProc, NULL); } } @@ -2305,28 +2303,43 @@ SocketThread( MSG msg; ThreadSpecificData *tsdPtr = (ThreadSpecificData *)(arg); + /* + * Create a dummy window receiving socket events. + */ + tsdPtr->hwnd = CreateWindow("TclSocket", "TclSocket", WS_TILED, 0, 0, 0, 0, NULL, NULL, windowClass.hInstance, arg); /* - * Signal the main thread that the window has been created and that the - * socket thread is ready to go. + * Signalize thread creator that we are done creating the window. */ SetEvent(tsdPtr->readyEvent); + /* + * If unable to create the window, exit this thread immediately. + */ + if (tsdPtr->hwnd == NULL) { return 1; } /* * Process all messages on the socket window until WM_QUIT. + * This threads exits only when instructed to do so by the + * call to PostMessage(SOCKET_TERMINATE) in TclpFinalizeSockets(). */ while (GetMessage(&msg, NULL, 0, 0) > 0) { DispatchMessage(&msg); } + /* + * This releases waiters on thread exit in TclpFinalizeSockets() + */ + + SetEvent(tsdPtr->readyEvent); + return msg.wParam; } @@ -2704,7 +2717,7 @@ TcpThreadActionProc( SocketInfo **nextPtrPtr; int removed = 0; - tsdPtr = TCL_TSD_INIT(&dataKey); + tsdPtr = TCL_TSD_INIT(&dataKey); /* * TIP #218, Bugfix: All access to socketList has to be protected by @@ -2713,7 +2726,7 @@ TcpThreadActionProc( WaitForSingleObject(tsdPtr->socketListLock, INFINITE); for (nextPtrPtr = &(tsdPtr->socketList); (*nextPtrPtr) != NULL; - nextPtrPtr = &((*nextPtrPtr)->nextPtr)) { + nextPtrPtr = &((*nextPtrPtr)->nextPtr)) { if ((*nextPtrPtr) == infoPtr) { (*nextPtrPtr) = infoPtr->nextPtr; removed = 1; |