/*
 * Message queues definitions
 *
 * Copyright 1993 Alexandre Julliard
 */

#ifndef __WINE_QUEUE_H
#define __WINE_QUEUE_H

#include "windef.h"
#include "winbase.h"
#include "wingdi.h"
#include "winuser.h"
#include "thread.h"


  /* Message as stored in the queue (contains the extraInfo field) */
typedef struct tagQMSG
{
    int   type;
    MSG   msg;
    DWORD extraInfo;  /* Only in 3.1 */
    
    struct tagQMSG *nextMsg;
    struct tagQMSG *prevMsg;
} QMSG;

#define QMSG_WIN16    0
#define QMSG_WIN32A   1
#define QMSG_WIN32W   2
#define QMSG_HARDWARE 3


/* Per-queue data for the message queue
 * Note that we currently only store the current values for
 * Active, Capture and Focus windows currently.
 * It might be necessary to store a pointer to the system message queue
 * as well since windows 9x maintains per thread system message queues
 */
typedef struct tagPERQUEUEDATA      
{
  HWND    hWndFocus;              /* Focus window */
  HWND    hWndActive;             /* Active window */
  HWND    hWndCapture;            /* Capture window */
  INT16     nCaptureHT;             /* Capture info (hit-test) */
  ULONG     ulRefCount;             /* Reference count */
  CRITICAL_SECTION cSection;        /* Critical section for thread safe access */
} PERQUEUEDATA;

/* Message queue */
typedef struct tagMESSAGEQUEUE
{
  HQUEUE16  self;                   /* Handle to self (was: reserved) */
  TEB*      teb;                    /* Thread owning queue */
  HANDLE    server_queue;           /* Handle to server-side queue */
  CRITICAL_SECTION cSection;        /* Queue access critical section */

  DWORD     magic;                  /* magic number should be QUEUE_MAGIC */
  DWORD     lockCount;              /* reference counter */
  
  QMSG*     firstMsg;               /* First message in linked list */
  QMSG*     lastMsg;                /* Last message in linked list */
  
  WORD      wPostQMsg;              /* PostQuitMessage flag */
  WORD      wExitCode;              /* PostQuitMessage exit code */
  WORD      wPaintCount;            /* Number of WM_PAINT needed */

  DWORD     GetMessageTimeVal;      /* Value for GetMessageTime */
  DWORD     GetMessagePosVal;       /* Value for GetMessagePos */
  DWORD     GetMessageExtraInfoVal; /* Value for GetMessageExtraInfo */

  HANDLE16  hCurHook;               /* Current hook */
  HANDLE16  hooks[WH_NB_HOOKS];     /* Task hooks list */

  PERQUEUEDATA *pQData;             /* pointer to (shared) PERQUEUEDATA structure */
  
} MESSAGEQUEUE;


#define QUEUE_MAGIC        0xD46E80AF

/* Per queue data management methods */
PERQUEUEDATA* PERQDATA_CreateInstance( void );
ULONG PERQDATA_Addref( PERQUEUEDATA* pQData );
ULONG PERQDATA_Release( PERQUEUEDATA* pQData );
HWND PERQDATA_GetFocusWnd( PERQUEUEDATA *pQData );
HWND PERQDATA_SetFocusWnd( PERQUEUEDATA *pQData, HWND hWndFocus );
HWND PERQDATA_GetActiveWnd( PERQUEUEDATA *pQData );
HWND PERQDATA_SetActiveWnd( PERQUEUEDATA *pQData, HWND hWndActive );
HWND PERQDATA_GetCaptureWnd( PERQUEUEDATA *pQData );
HWND PERQDATA_SetCaptureWnd( PERQUEUEDATA *pQData, HWND hWndCapture );
INT16  PERQDATA_GetCaptureInfo( PERQUEUEDATA *pQData );
INT16 PERQDATA_SetCaptureInfo( PERQUEUEDATA *pQData, INT16 nCaptureHT );
    
/* Message queue management methods */
extern MESSAGEQUEUE *QUEUE_Lock( HQUEUE16 hQueue );
extern void QUEUE_Unlock( MESSAGEQUEUE *queue );
extern void QUEUE_DumpQueue( HQUEUE16 hQueue );
extern BOOL QUEUE_IsExitingQueue( HQUEUE16 hQueue );
extern void QUEUE_SetExitingQueue( HQUEUE16 hQueue );
extern MESSAGEQUEUE *QUEUE_GetSysQueue(void);
extern void QUEUE_SetWakeBit( MESSAGEQUEUE *queue, WORD set, WORD clear );
extern void QUEUE_ClearWakeBit( MESSAGEQUEUE *queue, WORD bit );
extern WORD QUEUE_TestWakeBit( MESSAGEQUEUE *queue, WORD bit );
extern int QUEUE_WaitBits( WORD bits, DWORD timeout );
extern void QUEUE_IncPaintCount( HQUEUE16 hQueue );
extern void QUEUE_DecPaintCount( HQUEUE16 hQueue );
extern BOOL QUEUE_CreateSysMsgQueue( int size );
extern BOOL QUEUE_DeleteMsgQueue( HQUEUE16 hQueue );
extern HTASK16 QUEUE_GetQueueTask( HQUEUE16 hQueue );
extern BOOL QUEUE_FindMsg( HWND hwnd, UINT first, UINT last, BOOL remove,
                           BOOL sent_only, QMSG *msg );
extern void QUEUE_RemoveMsg( MESSAGEQUEUE * msgQueue, QMSG *qmsg );
extern void QUEUE_CleanupWindow( HWND hwnd );
extern void hardware_event( UINT message, WPARAM wParam, LPARAM lParam,
			    int xPos, int yPos, DWORD time, DWORD extraInfo );

extern HQUEUE16 WINAPI InitThreadInput16( WORD unknown, WORD flags );

#endif  /* __WINE_QUEUE_H */