diff -r 000000000000 -r bde4ae8d615e os/persistentdata/persistentstorage/sqlite3api/TEST/TCL/tcldistribution/win/tclWinNotify.c
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/os/persistentdata/persistentstorage/sqlite3api/TEST/TCL/tcldistribution/win/tclWinNotify.c	Fri Jun 15 03:10:57 2012 +0200
@@ -0,0 +1,561 @@
+/* 
+ * tclWinNotify.c --
+ *
+ *	This file contains Windows-specific procedures for the notifier,
+ *	which is the lowest-level part of the Tcl event loop.  This file
+ *	works together with ../generic/tclNotify.c.
+ *
+ * Copyright (c) 1995-1997 Sun Microsystems, Inc.
+ *
+ * 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 1.11.2.1 2003/03/21 03:24:09 dgp Exp $
+ */
+
+#include "tclWinInt.h"
+
+/*
+ * The follwing static indicates whether this module has been initialized.
+ */
+
+#define INTERVAL_TIMER 1	/* Handle of interval timer. */
+
+#define WM_WAKEUP WM_USER	/* Message that is send by
+				 * Tcl_AlertNotifier. */
+/*
+ * The following static structure contains the state information for the
+ * Windows implementation of the Tcl notifier.  One of these structures
+ * is created for each thread that is using the notifier.  
+ */
+
+typedef struct ThreadSpecificData {
+    CRITICAL_SECTION crit;	/* Monitor for this notifier. */
+    DWORD thread;		/* Identifier for thread associated with this
+				 * notifier. */
+    HANDLE event;		/* Event object used to wake up the notifier
+				 * thread. */
+    int pending;		/* Alert message pending, this field is
+				 * locked by the notifierMutex. */
+    HWND hwnd;			/* Messaging window. */
+    int timeout;		/* Current timeout value. */
+    int timerActive;		/* 1 if interval timer is running. */
+} 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.
+ *
+ * You must hold the notifierMutex lock before accessing this variable.
+ */
+
+static int notifierCount = 0;
+TCL_DECLARE_MUTEX(notifierMutex)
+
+/*
+ * Static routines defined in this file.
+ */
+
+static LRESULT CALLBACK	NotifierProc(HWND hwnd, UINT message,
+			    WPARAM wParam, LPARAM lParam);
+
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * Tcl_InitNotifier --
+ *
+ *	Initializes the platform specific notifier state.
+ *
+ * Results:
+ *	Returns a handle to the notifier state for this thread..
+ *
+ * Side effects:
+ *	None.
+ *
+ *----------------------------------------------------------------------
+ */
+
+ClientData
+Tcl_InitNotifier()
+{
+    ThreadSpecificData *tsdPtr = TCL_TSD_INIT(&dataKey);
+    WNDCLASS class;
+
+    /*
+     * 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)) {
+	    panic("Unable to register TclNotifier window class");
+	}
+    }
+    notifierCount++;
+    Tcl_MutexUnlock(&notifierMutex);
+
+    tsdPtr->pending = 0;
+    tsdPtr->timerActive = 0;
+
+    InitializeCriticalSection(&tsdPtr->crit);
+
+    tsdPtr->hwnd = NULL;
+    tsdPtr->thread = GetCurrentThreadId();
+    tsdPtr->event = CreateEvent(NULL, TRUE /* manual */,
+	    FALSE /* !signaled */, NULL);
+
+    return (ClientData) tsdPtr;
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * Tcl_FinalizeNotifier --
+ *
+ *	This function is called to cleanup the notifier state before
+ *	a thread is terminated.
+ *
+ * Results:
+ *	None.
+ *
+ * Side effects:
+ *	May dispose of the notifier window and class.
+ *
+ *----------------------------------------------------------------------
+ */
+
+void
+Tcl_FinalizeNotifier(clientData)
+    ClientData clientData;	/* Pointer to notifier data. */
+{
+    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.
+     */
+    if (tsdPtr == NULL) {
+	return;
+    }
+
+    DeleteCriticalSection(&tsdPtr->crit);
+    CloseHandle(tsdPtr->event);
+
+    /*
+     * Clean up the timer and messaging window for this thread.
+     */
+
+    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.
+     */
+
+    Tcl_MutexLock(&notifierMutex);
+    notifierCount--;
+    if (notifierCount == 0) {
+	UnregisterClassA("TclNotifier", TclWinGetTclInstance());
+    }
+    Tcl_MutexUnlock(&notifierMutex);
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * Tcl_AlertNotifier --
+ *
+ *	Wake up the specified notifier from any thread. This routine
+ *	is called by the platform independent notifier code whenever
+ *	the Tcl_ThreadAlert routine is called.  This routine is
+ *	guaranteed not to be called on a given notifier after
+ *	Tcl_FinalizeNotifier is called for that notifier.  This routine
+ *	is typically called from a thread other than the notifier's
+ *	thread.
+ *
+ * Results:
+ *	None.
+ *
+ * Side effects:
+ *	Sends a message to the messaging window for the notifier
+ *	if there isn't already one pending.
+ *
+ *----------------------------------------------------------------------
+ */
+
+void
+Tcl_AlertNotifier(clientData)
+    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 (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);
+    }
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * Tcl_SetTimer --
+ *
+ *	This procedure sets the current notifier timer value.  The
+ *	notifier will ensure that Tcl_ServiceAll() is called after
+ *	the specified interval, even if no events have occurred.
+ *
+ * Results:
+ *	None.
+ *
+ * Side effects:
+ *	Replaces any previous timer.
+ *
+ *----------------------------------------------------------------------
+ */
+
+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) {
+	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);
+    }
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * Tcl_ServiceModeHook --
+ *
+ *	This function is invoked whenever the service mode changes.
+ *
+ * Results:
+ *	None.
+ *
+ * Side effects:
+ *	If this is the first time the notifier is set into
+ *	TCL_SERVICE_ALL, then the communication window is created.
+ *
+ *----------------------------------------------------------------------
+ */
+
+void
+Tcl_ServiceModeHook(mode)
+    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);
+	/*
+	 * 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);
+    }
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * NotifierProc --
+ *
+ *	This procedure is invoked by Windows to process events on
+ *	the notifier window.  Messages will be sent to this window
+ *	in response to external timer events or calls to
+ *	TclpAlertTsdPtr->
+ *
+ * Results:
+ *	A standard windows result.
+ *
+ * Side effects:
+ *	Services any pending events.
+ *
+ *----------------------------------------------------------------------
+ */
+
+static LRESULT CALLBACK
+NotifierProc(
+    HWND hwnd,
+    UINT message,
+    WPARAM wParam,
+    LPARAM lParam)
+{
+    ThreadSpecificData *tsdPtr = TCL_TSD_INIT(&dataKey);
+
+    if (message == WM_WAKEUP) {
+	EnterCriticalSection(&tsdPtr->crit);
+	tsdPtr->pending = 0;
+	LeaveCriticalSection(&tsdPtr->crit);
+    } else if (message != WM_TIMER) {
+	return DefWindowProc(hwnd, message, wParam, lParam);
+    }
+	
+    /*
+     * Process all of the runnable events.
+     */
+
+    Tcl_ServiceAll();
+    return 0;
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * Tcl_WaitForEvent --
+ *
+ *	This function is called by Tcl_DoOneEvent to wait for new
+ *	events on the message queue.  If the block time is 0, then
+ *	Tcl_WaitForEvent just polls the event queue without blocking.
+ *
+ * Results:
+ *	Returns -1 if a WM_QUIT message is detected, returns 1 if
+ *	a message was dispatched, otherwise returns 0.
+ *
+ * Side effects:
+ *	Dispatches a message to a window procedure, which could do
+ *	anything.
+ *
+ *----------------------------------------------------------------------
+ */
+
+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 (timePtr) {
+	timeout = timePtr->sec * 1000 + timePtr->usec / 1000;
+    } else {
+	timeout = INFINITE;
+    }
+
+    /*
+     * 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.
+     */
+
+    if (!PeekMessage(&msg, NULL, 0, 0, PM_NOREMOVE)) {
+	/*
+	 * Wait for something to happen (a signal from another thread, a
+	 * message, or timeout).
+	 */
+
+	result = MsgWaitForMultipleObjects(1, &tsdPtr->event, FALSE, timeout,
+		QS_ALLINPUT);
+    }
+
+    /*
+     * Check to see if there are any messages to process.
+     */
+
+    if (PeekMessage(&msg, NULL, 0, 0, PM_NOREMOVE)) {
+	/*
+	 * Retrieve and dispatch the first message.
+	 */
+
+	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 {
+	status = 0;
+    }
+
+    ResetEvent(tsdPtr->event);
+    return status;
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * Tcl_Sleep --
+ *
+ *	Delay execution for the specified number of milliseconds.
+ *
+ * Results:
+ *	None.
+ *
+ * Side effects:
+ *	Time passes.
+ *
+ *----------------------------------------------------------------------
+ */
+
+void
+Tcl_Sleep(ms)
+    int ms;			/* Number of milliseconds to sleep. */
+{
+    /*
+     * Simply calling 'Sleep' for the requisite number of milliseconds
+     * can make the process appear to wake up early because it isn't
+     * synchronized with the CPU performance counter that is used in
+     * tclWinTime.c.  This behavior is probably benign, but messes
+     * up some of the corner cases in the test suite.  We get around
+     * this problem by repeating the 'Sleep' call as many times
+     * as necessary to make the clock advance by the requisite amount.
+     */
+
+    Tcl_Time now;		/* Current wall clock time */
+    Tcl_Time desired;		/* Desired wakeup time */
+    DWORD sleepTime = ms;	/* Time to sleep */
+
+    Tcl_GetTime( &now );
+    desired.sec = now.sec + ( ms / 1000 );
+    desired.usec = now.usec + 1000 * ( ms % 1000 );
+    if ( desired.usec > 1000000 ) {
+	++desired.sec;
+	desired.usec -= 1000000;
+    }
+	
+    for ( ; ; ) {
+	Sleep( sleepTime );
+	Tcl_GetTime( &now );
+	if ( now.sec > desired.sec ) {
+	    break;
+	} else if ( ( now.sec == desired.sec )
+	     && ( now.usec >= desired.usec ) ) {
+	    break;
+	}
+	sleepTime = ( ( 1000 * ( desired.sec - now.sec ) )
+		      + ( ( desired.usec - now.usec ) / 1000 ) );
+    }
+
+}