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+/* $Xorg: DisplayQue.h,v 1.4 2001/02/09 02:03:52 xorgcvs Exp $ */
+
+/*
+
+Copyright 1994, 1998 The Open Group
+
+Permission to use, copy, modify, distribute, and sell this software and its
+documentation for any purpose is hereby granted without fee, provided that
+the above copyright notice appear in all copies and that both that
+copyright notice and this permission notice appear in supporting
+documentation.
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+OPEN GROUP BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+Except as contained in this notice, the name of The Open Group shall not be
+used in advertising or otherwise to promote the sale, use or other dealings
+in this Software without prior written authorization from The Open Group.
+
+*/
+/* $XFree86: xc/lib/Xmu/DisplayQue.h,v 1.5 2001/01/17 19:42:54 dawes Exp $ */
+
+#ifndef _XMU_DISPLAYQUE_H_
+#define _XMU_DISPLAYQUE_H_
+
+#include <X11/Xmu/CloseHook.h>
+#include <X11/Xfuncproto.h>
+
+/*
+ * Public Entry Points
+ *
+ *
+ * XmuDisplayQueue *XmuDQCreate (closefunc, freefunc, data)
+ * XmuCloseDisplayQueueProc closefunc;
+ * XmuFreeDisplayQueueProc freefunc;
+ * XPointer data;
+ *
+ * Creates and returns a queue into which displays may be placed. When
+ * the display is closed, the closefunc (if non-NULL) is upcalled with
+ * as follows:
+ *
+ * (*closefunc) (queue, entry)
+ *
+ * The freeproc, if non-NULL, is called whenever the last display is
+ * closed, notifying the creator that display queue may be released
+ * using XmuDQDestroy.
+ *
+ *
+ * Bool XmuDQDestroy (q, docallbacks)
+ * XmuDisplayQueue *q;
+ * Bool docallbacks;
+ *
+ * Releases all memory for the indicated display queue. If docallbacks
+ * is true, then the closefunc (if non-NULL) is called for each
+ * display.
+ *
+ *
+ * XmuDisplayQueueEntry *XmuDQLookupDisplay (q, dpy)
+ * XmuDisplayQueue *q;
+ * Display *dpy;
+ *
+ * Returns the queue entry for the specified display or NULL if the
+ * display is not in the queue.
+ *
+ *
+ * XmuDisplayQueueEntry *XmuDQAddDisplay (q, dpy, data)
+ * XmuDisplayQueue *q;
+ * Display *dpy;
+ * XPointer data;
+ *
+ * Adds the indicated display to the end of the queue or NULL if it
+ * is unable to allocate memory. The data field may be used by the
+ * caller to attach arbitrary data to this display in this queue. The
+ * caller should use XmuDQLookupDisplay to make sure that the display
+ * hasn't already been added.
+ *
+ *
+ * Bool XmuDQRemoveDisplay (q, dpy)
+ * XmuDisplayQueue *q;
+ * Display *dpy;
+ *
+ * Removes the specified display from the given queue. If the
+ * indicated display is not found on this queue, False is returned,
+ * otherwise True is returned.
+ */
+
+typedef struct _XmuDisplayQueue XmuDisplayQueue;
+typedef struct _XmuDisplayQueueEntry XmuDisplayQueueEntry;
+
+typedef int (*XmuCloseDisplayQueueProc)(XmuDisplayQueue *queue,
+ XmuDisplayQueueEntry *entry);
+
+typedef int (*XmuFreeDisplayQueueProc)(XmuDisplayQueue *queue);
+
+struct _XmuDisplayQueueEntry {
+ struct _XmuDisplayQueueEntry *prev, *next;
+ Display *display;
+ CloseHook closehook;
+ XPointer data;
+};
+
+struct _XmuDisplayQueue {
+ int nentries;
+ XmuDisplayQueueEntry *head, *tail;
+ XmuCloseDisplayQueueProc closefunc;
+ XmuFreeDisplayQueueProc freefunc;
+ XPointer data;
+};
+
+_XFUNCPROTOBEGIN
+
+XmuDisplayQueue *XmuDQCreate
+(
+ XmuCloseDisplayQueueProc closefunc,
+ XmuFreeDisplayQueueProc freefunc,
+ XPointer data
+ );
+
+Bool XmuDQDestroy
+(
+ XmuDisplayQueue *q,
+ Bool docallbacks
+ );
+
+XmuDisplayQueueEntry *XmuDQLookupDisplay
+(
+ XmuDisplayQueue *q,
+ Display *dpy
+ );
+
+XmuDisplayQueueEntry *XmuDQAddDisplay
+(
+ XmuDisplayQueue *q,
+ Display *dpy,
+ XPointer data
+ );
+
+Bool XmuDQRemoveDisplay
+(
+ XmuDisplayQueue *q,
+ Display *dpy
+ );
+
+_XFUNCPROTOEND
+
+#define XmuDQNDisplays(q) ((q)->nentries)
+
+#endif /* _XMU_DISPLAYQUE_H_ */