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