include/queue.h

   1 /*
   2  * Message queues definitions
   3  *
   4  * Copyright 1993 Alexandre Julliard
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2.1 of the License, or (at your option) any later version.
  10  *
  11  * This library is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with this library; if not, write to the Free Software
  18  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  19  */
  20
  21 #ifndef __WINE_QUEUE_H
  22 #define __WINE_QUEUE_H
  23
  24 #include "windef.h"
  25 #include "winbase.h"
  26 #include "wingdi.h"
  27 #include "winuser.h"
  28 #include "thread.h"
  29
  30 #define WH_NB_HOOKS (WH_MAXHOOK-WH_MINHOOK+1)
  31
  32 struct received_message_info;
  33
  34 /* Message queue */
  35 typedef struct tagMESSAGEQUEUE
  36 {
  37   HQUEUE16  self;                   /* Handle to self (was: reserved) */
  38   HANDLE    server_queue;           /* Handle to server-side queue */
  39   DWORD     recursion_count;        /* Counter to prevent infinite SendMessage recursion */
  40   struct received_message_info *receive_info; /* Info about message being currently received */
  41
  42   DWORD     magic;                  /* magic number should be QUEUE_MAGIC */
  43   DWORD     lockCount;              /* reference counter */
  44
  45   DWORD     GetMessageTimeVal;      /* Value for GetMessageTime */
  46   DWORD     GetMessagePosVal;       /* Value for GetMessagePos */
  47   DWORD     GetMessageExtraInfoVal; /* Value for GetMessageExtraInfo */
  48
  49   HCURSOR   cursor;                 /* current cursor */
  50   INT       cursor_count;           /* cursor show count */
  51
  52   HANDLE16  hCurHook;               /* Current hook */
  53   HANDLE16  hooks[WH_NB_HOOKS];     /* Task hooks list */
  54 } MESSAGEQUEUE;
  55
  56
  57 #define QUEUE_MAGIC            0xD46E80AF
  58 #define MAX_SENDMSG_RECURSION  64
  59
  60 /* Message queue management methods */
  61 extern MESSAGEQUEUE *QUEUE_Current(void);
  62 extern MESSAGEQUEUE *QUEUE_Lock( HQUEUE16 hQueue );
  63 extern void QUEUE_Unlock( MESSAGEQUEUE *queue );
  64 extern void QUEUE_DeleteMsgQueue(void);
  65
  66 #endif  /* __WINE_QUEUE_H */