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#ifndef lint
static char *rcsid = "$Id: ioecall.c,v 1.2 1996/09/30 09:19:52 ishisone Exp $";
#endif
/*
* Copyright (C) 1994 Software Research Associates, Inc.
*
* Permission to use, copy, modify, and distribute this software and its
* documentation for any purpose and without fee is hereby granted, provided
* that the above copyright notice appear in all copies and that both that
* copyright notice and this permission notice appear in supporting
* documentation, and that the name of Software Research Associates not be
* used in advertising or publicity pertaining to distribution of the
* software without specific, written prior permission. Software Research
* Associates makes no representations about the suitability of this software
* for any purpose. It is provided "as is" without express or implied
* warranty.
*
* Author: Makoto Ishisone, Software Research Associates, Inc., Japan
*/
/*
* X I/O error callback
*/
#include <stdio.h>
#include <X11/Xlib.h>
#include <X11/Xfuncproto.h>
#include "IOECall.h"
#ifndef NULL
#define NULL 0
#endif
typedef struct ioe_cb_desc_ {
void (*callback)();
XPointer client_data;
struct ioe_cb_desc_ *next;
} CBDesc;
static CBDesc *cb_list;
static int (*original_handler)();
static int
XIOEHandler(dpy)
Display *dpy;
{
CBDesc *cb;
cb = cb_list;
while (cb != NULL) {
(*cb->callback)(cb->client_data);
cb = cb->next;
}
return (*original_handler)(dpy);
}
void
XIOEInit()
{
int (*oldhandler)() = XSetIOErrorHandler(XIOEHandler);
if (oldhandler != XIOEHandler) original_handler = oldhandler;
}
XIOEHandle
XIOESet(handler, client_data)
void (*handler)();
XPointer client_data;
{
CBDesc *cb;
cb = (CBDesc *)malloc(sizeof(CBDesc));
if (cb == NULL) return NULL;
cb->callback = handler;
cb->client_data = client_data;
cb->next = NULL;
if (cb_list == NULL) {
cb_list = cb;
} else {
CBDesc *p = cb_list;
while (p->next != NULL) p = p->next;
p->next = cb;
}
return cb;
}
void
XIOEUnset(handle)
XIOEHandle handle;
{
CBDesc *cb, *cb0;
cb = cb_list;
cb0 = NULL;
while (cb != NULL) {
if (cb == handle) {
if (cb0 == NULL) {
cb_list = cb->next;
} else {
cb0->next = cb->next;
}
(void)free((char *)cb);
return;
}
cb = cb->next;
}
}
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