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

#ifndef __WINE_QUEUE_H
#define __WINE_QUEUE_H

#include "wintypes.h"
#include "winuser.h"
#include "thread.h"


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


typedef struct tagSMSG
{
    struct tagSMSG *nextProcessing; /* next SMSG in the processing list */
    struct tagSMSG *nextPending;    /* next SMSG in the pending list */
    struct tagSMSG *nextWaiting;    /* next SMSG in the waiting list */
    
    HQUEUE16       hSrcQueue;       /* sending Queue, (NULL if it didn't wait) */
    HQUEUE16       hDstQueue;       /* destination Queue */

    HWND         hWnd;            /* destinantion window */
    UINT         msg;             /* message sent */
    WPARAM       wParam;          /* wParam of the sent message */
    LPARAM         lParam;          /* lParam of the sent message */

    LRESULT        lResult;         /* result of SendMessage */
    WORD           flags;           /* see below SMSG_XXXX */
} SMSG;


/* SMSG -> flags values */
/* set when lResult contains a good value */
#define SMSG_HAVE_RESULT            0x0001
/* protection for multiple call to ReplyMessage16() */
#define SMSG_ALREADY_REPLIED        0x0002
/* use with EARLY_REPLY for forcing the receiver to clean SMSG */
#define SMSG_RECEIVER_CLEANS        0x0010
/* used with EARLY_REPLY to indicate to sender, receiver is done with SMSG */
#define SMSG_RECEIVED               0x0020
/* set in ReceiveMessage() to indicate it's not an early reply */
#define SMSG_SENDING_REPLY          0x0040
/* set when ReplyMessage16() is called by the application */
#define SMSG_EARLY_REPLY            0x0080
/* set when sender is Win32 thread */
#define SMSG_WIN32                  0x1000
/* set when sender is a unnicode thread */
#define SMSG_UNICODE                0x2000

/* 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  next;                   /* Next queue */
  HQUEUE16  self;                   /* Handle to self (was: reserved) */
  THDB*     thdb;                   /* Thread owning queue */
  HANDLE  hEvent;                 /* Event handle */
  CRITICAL_SECTION cSection;        /* Queue access critical section */

  DWORD     magic;                  /* magic number should be QUEUE_MAGIC */
  DWORD     lockCount;              /* reference counter */
  WORD      wWinVersion;            /* Expected Windows version */
  
  WORD      msgCount;               /* Number of waiting messages */
  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 */
  WORD      wTimerCount;            /* Number of timers for this task */

  WORD      changeBits;             /* Changed wake-up bits */
  WORD      wakeBits;               /* Queue wake-up bits */
  WORD      wakeMask;               /* Queue wake-up mask */

  DWORD     GetMessageTimeVal;      /* Value for GetMessageTime */
  DWORD     GetMessagePosVal;       /* Value for GetMessagePos */
  DWORD     GetMessageExtraInfoVal; /* Value for GetMessageExtraInfo */
  
  SMSG*     smWaiting;              /* SendMessage waiting for reply */
  SMSG*     smProcessing;           /* SendMessage currently being processed */
  SMSG*     smPending;              /* SendMessage waiting to be received */
  
  HANDLE16  hCurHook;               /* Current hook */
  HANDLE16  hooks[WH_NB_HOOKS];     /* Task hooks list */

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


/* Extra (undocumented) queue wake bits - see "Undoc. Windows" */
#define QS_SMRESULT      0x8000  /* Queue has a SendMessage() result */

/* Types of SMSG stack */
#define SM_PROCESSING_LIST    1  /* list of SM currently being processed */
#define SM_PENDING_LIST       2  /* list of SM wating to be received */
#define SM_WAITING_LIST       3  /* list of SM waiting for reply */

#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 void QUEUE_WalkQueues(void);
extern BOOL QUEUE_IsExitingQueue( HQUEUE16 hQueue );
extern void QUEUE_SetExitingQueue( HQUEUE16 hQueue );
extern MESSAGEQUEUE *QUEUE_GetSysQueue(void);
extern void QUEUE_SetWakeBit( MESSAGEQUEUE *queue, WORD bit );
extern void QUEUE_ClearWakeBit( MESSAGEQUEUE *queue, WORD bit );
extern void QUEUE_ReceiveMessage( MESSAGEQUEUE *queue );
extern int QUEUE_WaitBits( WORD bits, DWORD timeout );
extern void QUEUE_IncPaintCount( HQUEUE16 hQueue );
extern void QUEUE_DecPaintCount( HQUEUE16 hQueue );
extern void QUEUE_IncTimerCount( HQUEUE16 hQueue );
extern void QUEUE_DecTimerCount( HQUEUE16 hQueue );
extern BOOL QUEUE_CreateSysMsgQueue( int size );
extern BOOL QUEUE_DeleteMsgQueue( HQUEUE16 hQueue );
extern HTASK16 QUEUE_GetQueueTask( HQUEUE16 hQueue );
extern BOOL QUEUE_AddMsg( HQUEUE16 hQueue, MSG * msg, DWORD extraInfo );
extern QMSG* QUEUE_FindMsg( MESSAGEQUEUE * msgQueue, HWND hwnd,
                          int first, int last );
extern void QUEUE_RemoveMsg( MESSAGEQUEUE * msgQueue, QMSG *qmsg );
extern SMSG *QUEUE_RemoveSMSG( MESSAGEQUEUE *queue, int list, SMSG *smsg );
extern BOOL QUEUE_AddSMSG( MESSAGEQUEUE *queue, int list, SMSG *smsg );
extern void hardware_event( WORD message, WORD wParam, LONG lParam,
			    int xPos, int yPos, DWORD time, DWORD extraInfo );

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

#endif  /* __WINE_QUEUE_H */