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- /** CloseWindowSafely.c **/
- /* Copyright (c) 1990 Commodore-Amiga, Inc.
- *
- * This example is provided in electronic form by Commodore-Amiga, Inc. for
- * use with the 1.3 revisions of the Addison-Wesley Amiga reference manuals.
- * The 1.3 Addison-Wesley Amiga Reference Manual series contains additional
- * information on the correct usage of the techniques and operating system
- * functions presented in this example. The source and executable code of
- * this example may only be distributed in free electronic form, via bulletin
- * board or as part of a fully non-commercial and freely redistributable
- * diskette. Both the source and executable code (including comments) must
- * be included, without modification, in any copy. This example may not be
- * published in printed form or distributed with any commercial product.
- * However, the programming techniques and support routines set forth in
- * this example may be used in the development of original executable
- * software products for Commodore Amiga computers.
- * All other rights reserved.
- * This example is provided "as-is" and is subject to change; no warranties
- * are made. All use is at your own risk. No liability or responsibility
- * is assumed.
- */
-
- #include <exec/types.h>
- #include <exec/nodes.h>
- #include <exec/lists.h>
- #include <exec/ports.h>
- #include <intuition/intuition.h>
-
- /* this function closes an intuition window that shares a port with
- * other intuition windows.
- *
- * It is careful to set the UserPort to null before closing, and to
- * free any messages that might have been sent.
- */
-
- CloseWindowSafely(win)
- struct Window *win;
- {
- Forbid();
-
- /* Send back any unprocessed messages for this window */
- StripIntuiMessages(win->UserPort,win);
-
- /* Null UserPort so Intuition won't free it */
- win->UserPort = NULL;
-
- /* Tell Intuition to stop sending more messages */
- ModifyIDCMP(win,0);
-
- /* Turn tasking back on */
- Permit();
-
- /* And really close the window */
- CloseWindow(win);
- }
-
- StripIntuiMessages(mp,win)
- struct MsgPort *mp;
- struct Window *win;
- {
- struct IntuiMessage *msg, *succ;
-
- msg = mp->mp_MsgList.lh_Head;
-
- while(succ = msg->ExecMessage.mn_Node.ln_Succ)
- {
- if(msg->IDCMPWindow == win)
- {
- /* Intuition is about to rudely free this message.
- * Make sure that we have politely sent it back.
- */
- Remove(msg);
- ReplyMsg(msg);
- }
- msg = succ;
- }
- }
-