diff options
Diffstat (limited to 'mac/tclMacNotify.c')
| -rw-r--r-- | mac/tclMacNotify.c | 123 |
1 files changed, 119 insertions, 4 deletions
diff --git a/mac/tclMacNotify.c b/mac/tclMacNotify.c index 1537f0c..22fdf26 100644 --- a/mac/tclMacNotify.c +++ b/mac/tclMacNotify.c @@ -5,12 +5,16 @@ * which is the lowest-level part of the Tcl event loop. This file * works together with ../generic/tclNotify.c. * + * The Mac notifier only polls for system and OS events, so it is process + * wide, rather than thread specific. However, this means that the convert + * event proc will have to arbitrate which events go to which threads. + * * Copyright (c) 1995-1996 Sun Microsystems, Inc. * * See the file "license.terms" for information on usage and redistribution * of this file, and for a DISCLAIMER OF ALL WARRANTIES. * - * SCCS: @(#) tclMacNotify.c 1.36 97/05/07 19:09:29 + * SCCS: @(#) tclMacNotify.c 1.39 98/02/18 11:53:32 */ #include "tclInt.h" @@ -22,6 +26,7 @@ #include <LowMem.h> #include <Processes.h> #include <Timer.h> +#include <Threads.h> /* @@ -81,9 +86,105 @@ static void NotifierExitHandler _ANSI_ARGS_(( /* *---------------------------------------------------------------------- * + * Tcl_InitNotifier -- + * + * Initializes the platform specific notifier state. There is no thread + * specific platform notifier on the Mac, so this really doesn't do + * anything. However, we need to return the ThreadID, since the generic + * notifier hands this back to us in AlertThread. + * + * Results: + * Returns the threadID for this thread. + * + * Side effects: + * None. + * + *---------------------------------------------------------------------- + */ + +ClientData +Tcl_InitNotifier() +{ + +#ifdef TCL_THREADS + ThreadID curThread; + if (TclMacHaveThreads()) { + GetCurrentThread(&curThread); + return (ClientData) curThread; + } else { + return NULL; + } +#else + return NULL; +#endif + +} + +/* + *---------------------------------------------------------------------- + * + * Tcl_FinalizeNotifier -- + * + * This function is called to cleanup the notifier state before + * a thread is terminated. There is no platform thread specific + * notifier, so this does nothing. + * + * Results: + * None. + * + * Side effects: + * None. + * + *---------------------------------------------------------------------- + */ + +void +Tcl_FinalizeNotifier(clientData) + ClientData clientData; /* Pointer to notifier data. */ +{ + /* Nothing to do on the Mac */ +} + +/* + *---------------------------------------------------------------------- + * + * 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. + * + * Results: + * None. + * + * Side effects: + * Calls YieldToThread from this thread. + * + *---------------------------------------------------------------------- + */ + +void +Tcl_AlertNotifier(clientData) + ClientData clientData; /* Pointer to thread data. */ +{ + +#ifdef TCL_THREADS + if (TclMacHaveThreads()) { + YieldToThread((ThreadID) clientData); + } +#endif + +} + +/* + *---------------------------------------------------------------------- + * * InitNotifier -- * - * Initializes the notifier structure. + * Initializes the notifier structure. Note - this function is never + * used. * * Results: * None. @@ -108,7 +209,8 @@ InitNotifier(void) * NotifierExitHandler -- * * This function is called to cleanup the notifier state before - * Tcl is unloaded. + * Tcl is unloaded. This function is never used, since InitNotifier + * isn't either. * * Results: * None. @@ -346,6 +448,17 @@ Tcl_WaitForEvent( } } TclMacRemoveTimer(timerToken); + + /* + * Yield time to nay other thread at this point. If we find that the + * apps thrash too switching between threads, we can put a timer here, + * and only yield when the timer fires. + */ + + if (TclMacHaveThreads()) { + YieldToAnyThread(); + } + return 0; } @@ -381,7 +494,9 @@ Tcl_Sleep( timerToken = TclMacStartTimer((long) ms); while (1) { WaitNextEvent(0, &dummy, (ms / 16.66) + 1, NULL); - + if (TclMacHaveThreads()) { + YieldToAnyThread(); + } if (TclMacTimerExpired(timerToken)) { break; } |