4.3BSD - /usr/src/new/X/Xlib/XMaskEvent.c

   1: #include <X/mit-copyright.h>
   2: 
   3: /* $Header: XMaskEvent.c,v 10.4 86/02/01 15:37:05 tony Rel $ */
   4: /* Copyright    Massachusetts Institute of Technology    1985	*/
   5: 
   6: #include "XlibInternal.h"
   7: 
   8: extern _QEvent *_qfree;
   9: 
  10: /*
  11:  * Flush output and (wait for and) return the next event in the queue
  12:  * matching one of the events in the mask.
  13:  * Events earlier in the queue are not discarded.
  14:  */
  15: 
  16: XMaskEvent (mask, event)
  17:     int mask;       /* Selected event mask. */
  18:     register XEvent *event; /* XEvent to be filled in. */
  19: {
  20:     register Display *dpy;
  21:     register _QEvent *prev, *qelt;
  22: 
  23:     dpy = _XlibCurrentDisplay;
  24:     _XFlush (dpy);
  25:     for (prev = NULL, qelt = dpy->head;
  26:          qelt &&  !(qelt->event.type & mask);
  27:          qelt = (prev = qelt)->next) ;
  28:     if (qelt) {
  29:         *event = qelt->event;
  30:         if (prev) {
  31:         if ((prev->next = qelt->next) == NULL)
  32:             dpy->tail = prev;
  33:         } else {
  34:         if ((dpy->head = qelt->next) == NULL)
  35:             dpy->tail = NULL;
  36:         }
  37:         qelt->next = _qfree;
  38:         _qfree = qelt;
  39:         dpy->qlen--;
  40:         return;
  41:     }
  42:     while (1) {
  43:         _XRead (dpy, event, sizeof(XEvent));
  44:         if (event->type == X_Error)
  45:         _XError(dpy, (XErrorEvent *) event);
  46:         else if (event->type & mask)
  47:         return;
  48:         else
  49:         _XEnq(dpy, event);
  50:     }
  51: }

Defined functions