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-rw-r--r--win/tclWinNotify.c442
1 files changed, 225 insertions, 217 deletions
diff --git a/win/tclWinNotify.c b/win/tclWinNotify.c
index d1cbf74..5f2365d 100644
--- a/win/tclWinNotify.c
+++ b/win/tclWinNotify.c
@@ -10,7 +10,7 @@
* See the file "license.terms" for information on usage and redistribution of
* this file, and for a DISCLAIMER OF ALL WARRANTIES.
*
- * RCS: @(#) $Id: tclWinNotify.c,v 1.21 2005/11/04 00:06:50 dkf Exp $
+ * RCS: @(#) $Id: tclWinNotify.c,v 1.22 2008/04/16 14:29:26 das Exp $
*/
#include "tclInt.h"
@@ -44,9 +44,6 @@ typedef struct ThreadSpecificData {
static Tcl_ThreadDataKey dataKey;
-extern TclStubs tclStubs;
-extern Tcl_NotifierProcs tclOriginalNotifier;
-
/*
* The following static indicates the number of threads that have initialized
* notifiers. It controls the lifetime of the TclNotifier window class.
@@ -83,45 +80,49 @@ static LRESULT CALLBACK NotifierProc(HWND hwnd, UINT message,
ClientData
Tcl_InitNotifier(void)
{
- ThreadSpecificData *tsdPtr = TCL_TSD_INIT(&dataKey);
- WNDCLASS class;
+ if (tclNotifierHooks.initNotifierProc) {
+ return tclNotifierHooks.initNotifierProc();
+ } else {
+ ThreadSpecificData *tsdPtr = TCL_TSD_INIT(&dataKey);
+ WNDCLASS class;
- /*
- * Register Notifier window class if this is the first thread to use this
- * module.
- */
+ /*
+ * Register Notifier window class if this is the first thread to use
+ * this module.
+ */
- Tcl_MutexLock(&notifierMutex);
- if (notifierCount == 0) {
- class.style = 0;
- class.cbClsExtra = 0;
- class.cbWndExtra = 0;
- class.hInstance = TclWinGetTclInstance();
- class.hbrBackground = NULL;
- class.lpszMenuName = NULL;
- class.lpszClassName = "TclNotifier";
- class.lpfnWndProc = NotifierProc;
- class.hIcon = NULL;
- class.hCursor = NULL;
-
- if (!RegisterClassA(&class)) {
- Tcl_Panic("Unable to register TclNotifier window class");
+ Tcl_MutexLock(&notifierMutex);
+ if (notifierCount == 0) {
+ class.style = 0;
+ class.cbClsExtra = 0;
+ class.cbWndExtra = 0;
+ class.hInstance = TclWinGetTclInstance();
+ class.hbrBackground = NULL;
+ class.lpszMenuName = NULL;
+ class.lpszClassName = "TclNotifier";
+ class.lpfnWndProc = NotifierProc;
+ class.hIcon = NULL;
+ class.hCursor = NULL;
+
+ if (!RegisterClassA(&class)) {
+ Tcl_Panic("Unable to register TclNotifier window class");
+ }
}
- }
- notifierCount++;
- Tcl_MutexUnlock(&notifierMutex);
+ notifierCount++;
+ Tcl_MutexUnlock(&notifierMutex);
- tsdPtr->pending = 0;
- tsdPtr->timerActive = 0;
+ tsdPtr->pending = 0;
+ tsdPtr->timerActive = 0;
- InitializeCriticalSection(&tsdPtr->crit);
+ InitializeCriticalSection(&tsdPtr->crit);
- tsdPtr->hwnd = NULL;
- tsdPtr->thread = GetCurrentThreadId();
- tsdPtr->event = CreateEvent(NULL, TRUE /* manual */,
- FALSE /* !signaled */, NULL);
+ tsdPtr->hwnd = NULL;
+ tsdPtr->thread = GetCurrentThreadId();
+ tsdPtr->event = CreateEvent(NULL, TRUE /* manual */,
+ FALSE /* !signaled */, NULL);
- return (ClientData) tsdPtr;
+ return (ClientData) tsdPtr;
+ }
}
/*
@@ -145,46 +146,51 @@ void
Tcl_FinalizeNotifier(
ClientData clientData) /* Pointer to notifier data. */
{
- ThreadSpecificData *tsdPtr = (ThreadSpecificData *) clientData;
+ if (tclNotifierHooks.finalizeNotifierProc) {
+ tclNotifierHooks.finalizeNotifierProc(clientData);
+ return;
+ } else {
+ ThreadSpecificData *tsdPtr = (ThreadSpecificData *) clientData;
- /*
- * Only finalize the notifier if a notifier was installed in the current
- * thread; there is a route in which this is not guaranteed to be true
- * (when tclWin32Dll.c:DllMain() is called with the flag
- * DLL_PROCESS_DETACH by the OS, which could be doing so from a thread
- * that's never previously been involved with Tcl, e.g. the task manager)
- * so this check is important.
- *
- * Fixes Bug #217982 reported by Hugh Vu and Gene Leache.
- */
+ /*
+ * Only finalize the notifier if a notifier was installed in the
+ * current thread; there is a route in which this is not guaranteed to
+ * be true (when tclWin32Dll.c:DllMain() is called with the flag
+ * DLL_PROCESS_DETACH by the OS, which could be doing so from a thread
+ * that's never previously been involved with Tcl, e.g. the task
+ * manager) so this check is important.
+ *
+ * Fixes Bug #217982 reported by Hugh Vu and Gene Leache.
+ */
- if (tsdPtr == NULL) {
- return;
- }
+ if (tsdPtr == NULL) {
+ return;
+ }
- DeleteCriticalSection(&tsdPtr->crit);
- CloseHandle(tsdPtr->event);
+ DeleteCriticalSection(&tsdPtr->crit);
+ CloseHandle(tsdPtr->event);
- /*
- * Clean up the timer and messaging window for this thread.
- */
+ /*
+ * Clean up the timer and messaging window for this thread.
+ */
- if (tsdPtr->hwnd) {
- KillTimer(tsdPtr->hwnd, INTERVAL_TIMER);
- DestroyWindow(tsdPtr->hwnd);
- }
+ if (tsdPtr->hwnd) {
+ KillTimer(tsdPtr->hwnd, INTERVAL_TIMER);
+ DestroyWindow(tsdPtr->hwnd);
+ }
- /*
- * If this is the last thread to use the notifier, unregister the notifier
- * window class.
- */
+ /*
+ * If this is the last thread to use the notifier, unregister the
+ * notifier window class.
+ */
- Tcl_MutexLock(&notifierMutex);
- notifierCount--;
- if (notifierCount == 0) {
- UnregisterClassA("TclNotifier", TclWinGetTclInstance());
+ Tcl_MutexLock(&notifierMutex);
+ notifierCount--;
+ if (notifierCount == 0) {
+ UnregisterClassA("TclNotifier", TclWinGetTclInstance());
+ }
+ Tcl_MutexUnlock(&notifierMutex);
}
- Tcl_MutexUnlock(&notifierMutex);
}
/*
@@ -213,27 +219,32 @@ void
Tcl_AlertNotifier(
ClientData clientData) /* Pointer to thread data. */
{
- ThreadSpecificData *tsdPtr = (ThreadSpecificData *) clientData;
-
- /*
- * Note that we do not need to lock around access to the hwnd because the
- * race condition has no effect since any race condition implies that the
- * notifier thread is already awake.
- */
+ if (tclNotifierHooks.alertNotifierProc) {
+ tclNotifierHooks.alertNotifierProc(clientData);
+ return;
+ } else {
+ ThreadSpecificData *tsdPtr = (ThreadSpecificData *) clientData;
- if (tsdPtr->hwnd) {
/*
- * We do need to lock around access to the pending flag.
+ * Note that we do not need to lock around access to the hwnd because
+ * the race condition has no effect since any race condition implies
+ * that the notifier thread is already awake.
*/
- EnterCriticalSection(&tsdPtr->crit);
- if (!tsdPtr->pending) {
- PostMessage(tsdPtr->hwnd, WM_WAKEUP, 0, 0);
+ if (tsdPtr->hwnd) {
+ /*
+ * We do need to lock around access to the pending flag.
+ */
+
+ EnterCriticalSection(&tsdPtr->crit);
+ if (!tsdPtr->pending) {
+ PostMessage(tsdPtr->hwnd, WM_WAKEUP, 0, 0);
+ }
+ tsdPtr->pending = 1;
+ LeaveCriticalSection(&tsdPtr->crit);
+ } else {
+ SetEvent(tsdPtr->event);
}
- tsdPtr->pending = 1;
- LeaveCriticalSection(&tsdPtr->crit);
- } else {
- SetEvent(tsdPtr->event);
}
}
@@ -259,50 +270,45 @@ void
Tcl_SetTimer(
Tcl_Time *timePtr) /* Maximum block time, or NULL. */
{
- ThreadSpecificData *tsdPtr = TCL_TSD_INIT(&dataKey);
- UINT timeout;
-
- /*
- * Allow the notifier to be hooked. This may not make sense on Windows,
- * but mirrors the UNIX hook.
- */
-
- if (tclStubs.tcl_SetTimer != tclOriginalNotifier.setTimerProc) {
- tclStubs.tcl_SetTimer(timePtr);
- return;
- }
-
- /*
- * We only need to set up an interval timer if we're being called from an
- * external event loop. If we don't have a window handle then we just
- * return immediately and let Tcl_WaitForEvent handle timeouts.
- */
-
- if (!tsdPtr->hwnd) {
+ if (tclNotifierHooks.setTimerProc) {
+ tclNotifierHooks.setTimerProc(timePtr);
return;
- }
-
- if (!timePtr) {
- timeout = 0;
} else {
+ ThreadSpecificData *tsdPtr = TCL_TSD_INIT(&dataKey);
+ UINT timeout;
+
/*
- * Make sure we pass a non-zero value into the timeout argument.
- * Windows seems to get confused by zero length timers.
+ * We only need to set up an interval timer if we're being called from
+ * an external event loop. If we don't have a window handle then we
+ * just return immediately and let Tcl_WaitForEvent handle timeouts.
*/
- timeout = timePtr->sec * 1000 + timePtr->usec / 1000;
- if (timeout == 0) {
- timeout = 1;
+ if (!tsdPtr->hwnd) {
+ return;
+ }
+
+ if (!timePtr) {
+ timeout = 0;
+ } else {
+ /*
+ * Make sure we pass a non-zero value into the timeout argument.
+ * Windows seems to get confused by zero length timers.
+ */
+
+ timeout = timePtr->sec * 1000 + timePtr->usec / 1000;
+ if (timeout == 0) {
+ timeout = 1;
+ }
+ }
+ tsdPtr->timeout = timeout;
+ if (timeout != 0) {
+ tsdPtr->timerActive = 1;
+ SetTimer(tsdPtr->hwnd, INTERVAL_TIMER,
+ (unsigned long) tsdPtr->timeout, NULL);
+ } else {
+ tsdPtr->timerActive = 0;
+ KillTimer(tsdPtr->hwnd, INTERVAL_TIMER);
}
- }
- tsdPtr->timeout = timeout;
- if (timeout != 0) {
- tsdPtr->timerActive = 1;
- SetTimer(tsdPtr->hwnd, INTERVAL_TIMER, (unsigned long) tsdPtr->timeout,
- NULL);
- } else {
- tsdPtr->timerActive = 0;
- KillTimer(tsdPtr->hwnd, INTERVAL_TIMER);
}
}
@@ -328,29 +334,36 @@ Tcl_ServiceModeHook(
int mode) /* Either TCL_SERVICE_ALL, or
* TCL_SERVICE_NONE. */
{
- ThreadSpecificData *tsdPtr = TCL_TSD_INIT(&dataKey);
-
- /*
- * If this is the first time that the notifier has been used from a modal
- * loop, then create a communication window. Note that after this point,
- * the application needs to service events in a timely fashion or Windows
- * will hang waiting for the window to respond to synchronous system
- * messages. At some point, we may want to consider destroying the window
- * if we leave the modal loop, but for now we'll leave it around.
- */
-
- if (mode == TCL_SERVICE_ALL && !tsdPtr->hwnd) {
- tsdPtr->hwnd = CreateWindowA("TclNotifier", "TclNotifier", WS_TILED,
- 0, 0, 0, 0, NULL, NULL, TclWinGetTclInstance(), NULL);
+ if (tclNotifierHooks.serviceModeHookProc) {
+ tclNotifierHooks.serviceModeHookProc(mode);
+ return;
+ } else {
+ ThreadSpecificData *tsdPtr = TCL_TSD_INIT(&dataKey);
/*
- * Send an initial message to the window to ensure that we wake up the
- * notifier once we get into the modal loop. This will force the
- * notifier to recompute the timeout value and schedule a timer if one
- * is needed.
+ * If this is the first time that the notifier has been used from a
+ * modal loop, then create a communication window. Note that after this
+ * point, the application needs to service events in a timely fashion
+ * or Windows will hang waiting for the window to respond to
+ * synchronous system messages. At some point, we may want to consider
+ * destroying the window if we leave the modal loop, but for now we'll
+ * leave it around.
*/
- Tcl_AlertNotifier((ClientData)tsdPtr);
+ if (mode == TCL_SERVICE_ALL && !tsdPtr->hwnd) {
+ tsdPtr->hwnd = CreateWindowA("TclNotifier", "TclNotifier",
+ WS_TILED, 0, 0, 0, 0, NULL, NULL, TclWinGetTclInstance(),
+ NULL);
+
+ /*
+ * Send an initial message to the window to ensure that we wake up
+ * the notifier once we get into the modal loop. This will force
+ * the notifier to recompute the timeout value and schedule a timer
+ * if one is needed.
+ */
+
+ Tcl_AlertNotifier((ClientData)tsdPtr);
+ }
}
}
@@ -420,105 +433,100 @@ int
Tcl_WaitForEvent(
Tcl_Time *timePtr) /* Maximum block time, or NULL. */
{
- ThreadSpecificData *tsdPtr = TCL_TSD_INIT(&dataKey);
- MSG msg;
- DWORD timeout, result;
- int status;
-
- /*
- * Allow the notifier to be hooked. This may not make sense on windows,
- * but mirrors the UNIX hook.
- */
-
- if (tclStubs.tcl_WaitForEvent != tclOriginalNotifier.waitForEventProc) {
- return tclStubs.tcl_WaitForEvent(timePtr);
- }
-
- /*
- * Compute the timeout in milliseconds.
- */
+ if (tclNotifierHooks.waitForEventProc) {
+ return tclNotifierHooks.waitForEventProc(timePtr);
+ } else {
+ ThreadSpecificData *tsdPtr = TCL_TSD_INIT(&dataKey);
+ MSG msg;
+ DWORD timeout, result;
+ int status;
- if (timePtr) {
/*
- * TIP #233 (Virtualized Time). Convert virtual domain delay to
- * real-time.
+ * Compute the timeout in milliseconds.
*/
- Tcl_Time myTime;
+ if (timePtr) {
+ /*
+ * TIP #233 (Virtualized Time). Convert virtual domain delay to
+ * real-time.
+ */
- myTime.sec = timePtr->sec;
- myTime.usec = timePtr->usec;
+ Tcl_Time myTime;
- if (myTime.sec != 0 || myTime.usec != 0) {
- (*tclScaleTimeProcPtr) (&myTime, tclTimeClientData);
- }
+ myTime.sec = timePtr->sec;
+ myTime.usec = timePtr->usec;
- timeout = myTime.sec * 1000 + myTime.usec / 1000;
- } else {
- timeout = INFINITE;
- }
+ if (myTime.sec != 0 || myTime.usec != 0) {
+ (*tclScaleTimeProcPtr) (&myTime, tclTimeClientData);
+ }
- /*
- * Check to see if there are any messages in the queue before waiting
- * because MsgWaitForMultipleObjects will not wake up if there are events
- * currently sitting in the queue.
- */
+ timeout = myTime.sec * 1000 + myTime.usec / 1000;
+ } else {
+ timeout = INFINITE;
+ }
- if (!PeekMessage(&msg, NULL, 0, 0, PM_NOREMOVE)) {
/*
- * Wait for something to happen (a signal from another thread, a
- * message, or timeout) or loop servicing asynchronous procedure calls
- * queued to this thread.
+ * Check to see if there are any messages in the queue before waiting
+ * because MsgWaitForMultipleObjects will not wake up if there are
+ * events currently sitting in the queue.
*/
- again:
- result = MsgWaitForMultipleObjectsEx(1, &tsdPtr->event, timeout,
- QS_ALLINPUT, MWMO_ALERTABLE);
- if (result == WAIT_IO_COMPLETION) {
- goto again;
- } else if (result == WAIT_FAILED) {
- status = -1;
- goto end;
- }
- }
+ if (!PeekMessage(&msg, NULL, 0, 0, PM_NOREMOVE)) {
+ /*
+ * Wait for something to happen (a signal from another thread, a
+ * message, or timeout) or loop servicing asynchronous procedure
+ * calls queued to this thread.
+ */
- /*
- * Check to see if there are any messages to process.
- */
+ again:
+ result = MsgWaitForMultipleObjectsEx(1, &tsdPtr->event, timeout,
+ QS_ALLINPUT, MWMO_ALERTABLE);
+ if (result == WAIT_IO_COMPLETION) {
+ goto again;
+ } else if (result == WAIT_FAILED) {
+ status = -1;
+ goto end;
+ }
+ }
- if (PeekMessage(&msg, NULL, 0, 0, PM_NOREMOVE)) {
/*
- * Retrieve and dispatch the first message.
+ * Check to see if there are any messages to process.
*/
- result = GetMessage(&msg, NULL, 0, 0);
- if (result == 0) {
- /*
- * We received a request to exit this thread (WM_QUIT), so
- * propagate the quit message and start unwinding.
- */
-
- PostQuitMessage((int) msg.wParam);
- status = -1;
- } else if (result == -1) {
+ if (PeekMessage(&msg, NULL, 0, 0, PM_NOREMOVE)) {
/*
- * We got an error from the system. I have no idea why this would
- * happen, so we'll just unwind.
+ * Retrieve and dispatch the first message.
*/
- status = -1;
+ result = GetMessage(&msg, NULL, 0, 0);
+ if (result == 0) {
+ /*
+ * We received a request to exit this thread (WM_QUIT), so
+ * propagate the quit message and start unwinding.
+ */
+
+ PostQuitMessage((int) msg.wParam);
+ status = -1;
+ } else if (result == -1) {
+ /*
+ * We got an error from the system. I have no idea why this
+ * would happen, so we'll just unwind.
+ */
+
+ status = -1;
+ } else {
+ TranslateMessage(&msg);
+ DispatchMessage(&msg);
+ status = 1;
+ }
} else {
- TranslateMessage(&msg);
- DispatchMessage(&msg);
- status = 1;
+ status = 0;
}
- } else {
- status = 0;
- }
- end:
- ResetEvent(tsdPtr->event);
- return status;
+ end:
+ ResetEvent(tsdPtr->event);
+ return status;
+ }
}
/*