- simpler and more straightforward event handling for timer, idle, input

and X events (also fixed some problems the old handling logic had)

WINGs/ChangeLog

@@ -7,6 +7,10 @@ Changes since wmaker 0.64.0:
 - added WMAddPersistentTimerHandler()
 - Moved all internal handlers (timer, idle and input) to handlers.c
 - simplified wevent.c and wutil.c.
+- fixed handling of input with poll (was broken)
+- fixed mem leak that occured when input handling was done with poll
+- simpler and more straightforward event handling for timer, idle, input
+  and X events (also fixed some problems the old handling logic had)
 
 changes since wmaker 0.63.1:
 ............................

WINGs/WINGs/WINGsP.h

@@ -542,8 +542,6 @@ Bool W_CheckIdleHandlers(void);
 
 void W_CheckTimerHandlers(void);
 
-Bool W_HaveInputHandlers(void);
-
 Bool W_HandleInputEvents(Bool waitForInput, int inputfd);
 
 #ifdef __cplusplus

WINGs/WINGs/WUtil.h

@@ -279,7 +279,7 @@ int wsprintesc(char *buffer, int length, char *format, WMSEscapes **escapes,
 
 /*......................................................................*/
 
-/* This function is used _only_ if you create a NON-GUI program.
+/* This function is used _only_ if you create a non-GUI program.
  * For GUI based programs use WMNextEvent()/WMHandleEvent() instead.
  * This function will handle all input/timer/idle events, then return.
  */

WINGs/handlers.c

@@ -389,13 +389,6 @@ W_CheckTimerHandlers(void)
 }
 
 
-Bool
-W_HaveInputHandlers(void)
-{
-    return (inputHandler && WMGetBagItemCount(inputHandler)>0);
-}
-
-
 /*
  * This functions will handle input events on all registered file descriptors.
  * Input:
@@ -423,10 +416,10 @@ W_HaveInputHandlers(void)
  *
  * Parametersshould be passed like this:
  * - from wevent.c:
- *   waitForInput = True
+ *   waitForInput - apropriate value passed by the function who called us
  *   inputfd = ConnectionNumber(dpy)
  * - from wutil.c:
- *   waitForInput - value passed from the function who calls this function
+ *   waitForInput - apropriate value passed by the function who called us
  *   inputfd = -1
  *
  */
@@ -436,7 +429,7 @@ W_HandleInputEvents(Bool waitForInput, int inputfd)
 #if defined(HAVE_POLL) && defined(HAVE_POLL_H) && !defined(HAVE_SELECT)
     struct poll fd *fds;
     InputHandler *handler;
-    int count, timeout, nfds, i, extrafd, retval;
+    int count, timeout, nfds, i, extrafd;
 
     extrafd = (inputfd < 0) ? 0 : 1;
 
@@ -526,17 +519,14 @@ W_HandleInputEvents(Bool waitForInput, int inputfd)
         WMFreeBag(handlerCopy);
     }
 
-    /* we may only return count>0, because the returned value is not checked
-     * anywhere anyway. -Dan
-     */
-    retval = ((inputfd < 0) ? (count > 0) :
-              fds[nfds].revents & (POLLIN|POLLRDNORM|POLLRDBAND|POLLPRI));
+    /* --oldway-- retval = ((inputfd < 0) ? (count > 0) :
+     fds[nfds].revents & (POLLIN|POLLRDNORM|POLLRDBAND|POLLPRI));*/
 
     wfree(fds);
 
     W_FlushASAPNotificationQueue();
 
-    return retval;
+    return (count > 0);
 #else
 #ifdef HAVE_SELECT
     struct timeval timeout;
@@ -634,7 +624,8 @@ W_HandleInputEvents(Bool waitForInput, int inputfd)
 
     W_FlushASAPNotificationQueue();
 
-    return ((inputfd < 0) ? (count > 0) : FD_ISSET(inputfd, &rset));
+    /* --oldway-- return ((inputfd < 0) ? (count > 0) : FD_ISSET(inputfd, &rset));*/
+    return (count > 0);
 #else /* not HAVE_SELECT, not HAVE_POLL */
     Neither select nor poll. You lose.
 #endif /* HAVE_SELECT */

WINGs/wevent.c

@@ -381,8 +381,13 @@ WMIsDoubleClick(XEvent *event)
 }
 
 
-Bool
-W_WaitForEvent(Display *dpy, unsigned long xeventmask)
+/*
+ * If waitForInput is False, it will just peek to see if input is available
+ * then return without processing input but the return value will show
+ * if input is available or not.
+ */
+static Bool
+waitForEvent(Display *dpy, unsigned long xeventmask, Bool waitForInput)
 {
     XSync(dpy, False);
     if (xeventmask==0) {
@@ -396,7 +401,7 @@ W_WaitForEvent(Display *dpy, unsigned long xeventmask)
 	}
     }
 
-    return W_HandleInputEvents(True, ConnectionNumber(dpy));
+    return W_HandleInputEvents(waitForInput, ConnectionNumber(dpy));
 }
 
 
@@ -407,9 +412,8 @@ WMNextEvent(Display *dpy, XEvent *event)
     W_CheckTimerHandlers();
 
     while (XPending(dpy) == 0) {
-	/* Do idle stuff */
 	/* Do idle and timer stuff while there are no timer or X events */
-	while (XPending(dpy) == 0 && W_CheckIdleHandlers()) {
+	while (!waitForEvent(dpy, 0, False) && W_CheckIdleHandlers()) {
 	    /* dispatch timer events */
             W_CheckTimerHandlers();
 	}
@@ -420,8 +424,8 @@ WMNextEvent(Display *dpy, XEvent *event)
 	 * an event that already arrived. 
 	 */
 	/* wait for something to happen or a timer to expire */
-	W_WaitForEvent(dpy, 0);
-	
+	waitForEvent(dpy, 0, True);
+
         /* Check any expired timers */
         W_CheckTimerHandlers();
     }
@@ -429,8 +433,9 @@ WMNextEvent(Display *dpy, XEvent *event)
     XNextEvent(dpy, event);
 }
 
+
 /*
- * Cant use this because XPending() will make W_WaitForEvent
+ * Cant use this because XPending() will make waitForEvent
  * return even if the event in the queue is not what we want,
  * and if we block until some new event arrives from the
  * server, other events already in the queue (like Expose)
@@ -438,7 +443,7 @@ WMNextEvent(Display *dpy, XEvent *event)
  */
 void
 WMMaskEvent(Display *dpy, long mask, XEvent *event)
-{ 
+{
     while (!XCheckMaskEvent(dpy, mask, event)) {
 	/* Do idle stuff while there are no timer or X events */
 	while (W_CheckIdleHandlers()) {
@@ -446,15 +451,16 @@ WMMaskEvent(Display *dpy, long mask, XEvent *event)
 		return;
 	}
 
-        /* Wait for input on the X connection socket */
-	W_WaitForEvent(dpy, mask);
+        /* Wait for input on the X connection socket or another input handler */
+	waitForEvent(dpy, mask, True);
 
         /* Check any expired timers */
         W_CheckTimerHandlers();
     }
 }
 
-Bool 
+
+Bool
 WMScreenPending(WMScreen *scr)
 {
     if (XPending(scr->display))

WINGs/wutil.c

@@ -7,28 +7,15 @@
 #include "WINGsP.h"
 
 
-
 void
 WHandleEvents()
 {
     /* Check any expired timers */
     W_CheckTimerHandlers();
 
-    /* We need to make sure that we have some input handler before calling
-     * W_CheckIdleHandlers() in a while loop, because else the while loop
-     * can run forever (if some idle handler reinitiates itself).
-     */
-    if (W_HaveInputHandlers()) {
-        /* Do idle and timer stuff while there are no input events */
-        /* Check again if there are still input handlers, because some idle
-         * handler could have removed them */
-        while (W_CheckIdleHandlers() && W_HaveInputHandlers() &&
-               !W_HandleInputEvents(False, -1)) {
-            /* dispatch timer events */
-            W_CheckTimerHandlers();
-        }
-    } else {
-        W_CheckIdleHandlers();
+    /* Do idle and timer stuff while there are no input events */
+    /* Do not wait for input here. just peek to se if input is available */
+    while (!W_HandleInputEvents(False, -1) && W_CheckIdleHandlers()) {
         /* dispatch timer events */
         W_CheckTimerHandlers();
     }

src/startup.c

@@ -335,7 +335,7 @@ handleSig(int sig)
 	    wfatal(_("crashed while trying to do some post-crash cleanup. Aborting immediatelly."));
             signal(sig, SIG_DFL);
             kill(getpid(), sig);
-            exit(1);
+            return;
 	}
 	already_crashed = 1;