diff options
Diffstat (limited to 'win/tclWinNotify.c')
| -rw-r--r-- | win/tclWinNotify.c | 622 |
1 files changed, 330 insertions, 292 deletions
diff --git a/win/tclWinNotify.c b/win/tclWinNotify.c index 3bcfd2b..4543b02 100644 --- a/win/tclWinNotify.c +++ b/win/tclWinNotify.c @@ -1,16 +1,14 @@ -/* +/* * 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. + * 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 1.16 2004/04/06 22:25:58 dgp Exp $ + * See the file "license.terms" for information on usage and redistribution of + * this file, and for a DISCLAIMER OF ALL WARRANTIES. */ #include "tclInt.h" @@ -19,14 +17,14 @@ * The follwing static indicates whether this module has been initialized. */ -#define INTERVAL_TIMER 1 /* Handle of interval timer. */ +#define INTERVAL_TIMER 1 /* Handle of interval timer. */ -#define WM_WAKEUP WM_USER /* Message that is send by +#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. + * Windows implementation of the Tcl notifier. One of these structures is + * created for each thread that is using the notifier. */ typedef struct ThreadSpecificData { @@ -35,8 +33,8 @@ typedef struct ThreadSpecificData { * notifier. */ HANDLE event; /* Event object used to wake up the notifier * thread. */ - int pending; /* Alert message pending, this field is - * locked by the notifierMutex. */ + 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. */ @@ -44,27 +42,23 @@ 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. + * 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; +static const TCHAR classname[] = TEXT("TclNotifier"); TCL_DECLARE_MUTEX(notifierMutex) /* * Static routines defined in this file. */ -static LRESULT CALLBACK NotifierProc(HWND hwnd, UINT message, - WPARAM wParam, LPARAM lParam); - +static LRESULT CALLBACK NotifierProc(HWND hwnd, UINT message, + WPARAM wParam, LPARAM lParam); /* *---------------------------------------------------------------------- @@ -83,47 +77,51 @@ static LRESULT CALLBACK NotifierProc(HWND hwnd, UINT message, */ ClientData -Tcl_InitNotifier() +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(¬ifierMutex); - 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(¬ifierMutex); + if (notifierCount == 0) { + class.style = 0; + class.cbClsExtra = 0; + class.cbWndExtra = 0; + class.hInstance = TclWinGetTclInstance(); + class.hbrBackground = NULL; + class.lpszMenuName = NULL; + class.lpszClassName = classname; + class.lpfnWndProc = NotifierProc; + class.hIcon = NULL; + class.hCursor = NULL; + + if (!RegisterClass(&class)) { + Tcl_Panic("Unable to register TclNotifier window class"); + } } - } - notifierCount++; - Tcl_MutexUnlock(¬ifierMutex); + notifierCount++; + Tcl_MutexUnlock(¬ifierMutex); - 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 tsdPtr; + } } /* @@ -131,8 +129,8 @@ Tcl_InitNotifier() * * Tcl_FinalizeNotifier -- * - * This function is called to cleanup the notifier state before - * a thread is terminated. + * This function is called to cleanup the notifier state before a thread + * is terminated. * * Results: * None. @@ -144,48 +142,54 @@ Tcl_InitNotifier() */ void -Tcl_FinalizeNotifier(clientData) - ClientData clientData; /* Pointer to notifier data. */ +Tcl_FinalizeNotifier( + 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) { + if (tclNotifierHooks.finalizeNotifierProc) { + tclNotifierHooks.finalizeNotifierProc(clientData); return; - } + } else { + ThreadSpecificData *tsdPtr = (ThreadSpecificData *) clientData; - DeleteCriticalSection(&tsdPtr->crit); - CloseHandle(tsdPtr->event); + /* + * 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. + */ - /* - * Clean up the timer and messaging window for this thread. - */ + if (tsdPtr == NULL) { + return; + } - if (tsdPtr->hwnd) { - KillTimer(tsdPtr->hwnd, INTERVAL_TIMER); - DestroyWindow(tsdPtr->hwnd); - } + DeleteCriticalSection(&tsdPtr->crit); + CloseHandle(tsdPtr->event); - /* - * If this is the last thread to use the notifier, unregister - * the notifier window class. - */ + /* + * 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(¬ifierMutex); - notifierCount--; - if (notifierCount == 0) { - UnregisterClassA("TclNotifier", TclWinGetTclInstance()); + Tcl_MutexLock(¬ifierMutex); + notifierCount--; + if (notifierCount == 0) { + UnregisterClass(classname, TclWinGetTclInstance()); + } + Tcl_MutexUnlock(¬ifierMutex); } - Tcl_MutexUnlock(¬ifierMutex); } /* @@ -193,49 +197,53 @@ Tcl_FinalizeNotifier(clientData) * * 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. + * 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. + * 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. */ +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); } } @@ -244,9 +252,9 @@ Tcl_AlertNotifier(clientData) * * 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. + * 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. @@ -259,53 +267,47 @@ Tcl_AlertNotifier(clientData) void Tcl_SetTimer( - Tcl_Time *timePtr) /* Maximum block time, or NULL. */ + const 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; } - } - tsdPtr->timeout = timeout; - if (timeout != 0) { - tsdPtr->timerActive = 1; - SetTimer(tsdPtr->hwnd, INTERVAL_TIMER, + + 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); + } else { + tsdPtr->timerActive = 0; + KillTimer(tsdPtr->hwnd, INTERVAL_TIMER); + } } } @@ -320,40 +322,47 @@ Tcl_SetTimer( * None. * * Side effects: - * If this is the first time the notifier is set into - * TCL_SERVICE_ALL, then the communication window is created. + * 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_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 (tclNotifierHooks.serviceModeHookProc) { + tclNotifierHooks.serviceModeHookProc(mode); + return; + } else { + ThreadSpecificData *tsdPtr = TCL_TSD_INIT(&dataKey); - 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. + * 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 = CreateWindow(classname, classname, + 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(tsdPtr); + } } } @@ -362,10 +371,9 @@ Tcl_ServiceModeHook(mode) * * 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-> + * 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. @@ -378,10 +386,10 @@ Tcl_ServiceModeHook(mode) static LRESULT CALLBACK NotifierProc( - HWND hwnd, - UINT message, - WPARAM wParam, - LPARAM lParam) + HWND hwnd, /* Passed on... */ + UINT message, /* What messsage is this? */ + WPARAM wParam, /* Passed on... */ + LPARAM lParam) /* Passed on... */ { ThreadSpecificData *tsdPtr = TCL_TSD_INIT(&dataKey); @@ -392,7 +400,7 @@ NotifierProc( } else if (message != WM_TIMER) { return DefWindowProc(hwnd, message, wParam, lParam); } - + /* * Process all of the runnable events. */ @@ -406,110 +414,118 @@ NotifierProc( * * 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. + * 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. + * 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. + * Dispatches a message to a window procedure, which could do anything. * *---------------------------------------------------------------------- */ int Tcl_WaitForEvent( - Tcl_Time *timePtr) /* Maximum block time, or NULL. */ + const Tcl_Time *timePtr) /* Maximum block time, or NULL. */ { - ThreadSpecificData *tsdPtr = TCL_TSD_INIT(&dataKey); - MSG msg; - DWORD timeout, result; - int status; + if (tclNotifierHooks.waitForEventProc) { + return tclNotifierHooks.waitForEventProc(timePtr); + } else { + 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. - */ + /* + * Compute the timeout in milliseconds. + */ - if (tclStubs.tcl_WaitForEvent != tclOriginalNotifier.waitForEventProc) { - return tclStubs.tcl_WaitForEvent(timePtr); - } + if (timePtr) { + /* + * TIP #233 (Virtualized Time). Convert virtual domain delay to + * real-time. + */ - /* - * Compute the timeout in milliseconds. - */ + Tcl_Time myTime; - 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. - */ + myTime.sec = timePtr->sec; + myTime.usec = timePtr->usec; - 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. - */ + if (myTime.sec != 0 || myTime.usec != 0) { + tclScaleTimeProcPtr(&myTime, tclTimeClientData); + } -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; + timeout = myTime.sec * 1000 + myTime.usec / 1000; + } else { + timeout = INFINITE; } - } - /* - * Check to see if there are any messages to process. - */ - - if (PeekMessage(&msg, NULL, 0, 0, PM_NOREMOVE)) { /* - * Retrieve and dispatch the first message. + * 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. */ - result = GetMessage(&msg, NULL, 0, 0); - if (result == 0) { + if (!PeekMessage(&msg, NULL, 0, 0, PM_NOREMOVE)) { /* - * We received a request to exit this thread (WM_QUIT), so - * propagate the quit message and start unwinding. + * Wait for something to happen (a signal from another thread, a + * message, or timeout) or loop servicing asynchronous procedure + * calls queued to this thread. */ - PostQuitMessage((int) msg.wParam); - status = -1; - } else if (result == -1) { + 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; + } + } + + /* + * Check to see if there are any messages to process. + */ + + 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 == (DWORD)-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; + } } /* @@ -529,42 +545,64 @@ end: */ void -Tcl_Sleep(ms) - int ms; /* Number of milliseconds to sleep. */ +Tcl_Sleep( + 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. + * 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_Time now; /* Current wall clock time. */ + Tcl_Time desired; /* Desired wakeup time. */ + Tcl_Time vdelay; /* Time to sleep, for scaling virtual -> + * real. */ + DWORD sleepTime; /* Time to sleep, real-time */ + + vdelay.sec = ms / 1000; + vdelay.usec = (ms % 1000) * 1000; - Tcl_GetTime( &now ); - desired.sec = now.sec + ( ms / 1000 ); - desired.usec = now.usec + 1000 * ( ms % 1000 ); - if ( desired.usec > 1000000 ) { + Tcl_GetTime(&now); + desired.sec = now.sec + vdelay.sec; + desired.usec = now.usec + vdelay.usec; + if (desired.usec > 1000000) { ++desired.sec; desired.usec -= 1000000; } - - for ( ; ; ) { - Sleep( sleepTime ); - Tcl_GetTime( &now ); - if ( now.sec > desired.sec ) { + + /* + * TIP #233: Scale delay from virtual to real-time. + */ + + tclScaleTimeProcPtr(&vdelay, tclTimeClientData); + sleepTime = vdelay.sec * 1000 + vdelay.usec / 1000; + + for (;;) { + SleepEx(sleepTime, TRUE); + Tcl_GetTime(&now); + if (now.sec > desired.sec) { break; - } else if ( ( now.sec == desired.sec ) - && ( now.usec >= desired.usec ) ) { + } else if ((now.sec == desired.sec) && (now.usec >= desired.usec)) { break; } - sleepTime = ( ( 1000 * ( desired.sec - now.sec ) ) - + ( ( desired.usec - now.usec ) / 1000 ) ); - } + vdelay.sec = desired.sec - now.sec; + vdelay.usec = desired.usec - now.usec; + + tclScaleTimeProcPtr(&vdelay, tclTimeClientData); + sleepTime = vdelay.sec * 1000 + vdelay.usec / 1000; + } } + +/* + * Local Variables: + * mode: c + * c-basic-offset: 4 + * fill-column: 78 + * End: + */ |