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Annotation of researchv9/X11/src/X.V11R1/lib/X/XPending.c, revision 1.1

1.1     ! root        1: #include "copyright.h"
        !             2: 
        !             3: /* $Header: XPending.c,v 11.10 87/09/11 08:05:32 toddb Exp $ */
        !             4: /* Copyright    Massachusetts Institute of Technology    1986  */
        !             5: 
        !             6: #define NEED_EVENTS
        !             7: #define NEED_REPLIES
        !             8: #include "Xlibint.h"
        !             9: 
        !            10: /* Read in any pending events and return the number of queued events. */
        !            11: 
        !            12: int XPending (dpy)
        !            13:     register Display *dpy;
        !            14: {
        !            15:        register int len;
        !            16:        int pend;
        !            17:        char buf[BUFSIZE];
        !            18:        register xReply *rep;
        !            19:        
        !            20:        LockDisplay(dpy);
        !            21:        _XFlush (dpy);
        !            22:        if (BytesReadable(dpy->fd, (char *) &pend) < 0)
        !            23:            (*_XIOErrorFunction)(dpy);
        !            24:        if ((len = pend) < sizeof(xReply)) {
        !            25:            UnlockDisplay(dpy);
        !            26:            return(dpy->qlen);
        !            27:            }
        !            28:        else if (len > BUFSIZE)
        !            29:            len = BUFSIZE;
        !            30:        len /= sizeof(xReply);
        !            31:        pend = len * sizeof(xReply);
        !            32:        _XRead (dpy, buf, (long) pend);
        !            33:        for (rep = (xReply *) buf; len > 0; rep++, len--) {
        !            34:            if (rep->generic.type == X_Error)
        !            35:                _XError(dpy, (xError *)rep);
        !            36:            else   /* must be an event packet */
        !            37:                _XEnq(dpy, (xEvent *) rep);
        !            38:        }
        !            39:        UnlockDisplay(dpy);
        !            40:        return(dpy->qlen);
        !            41: }
        !            42: 

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