2 * Message queues definitions
4 * Copyright 1993 Alexandre Julliard
15 /* Message as stored in the queue (contains the extraInfo field) */
16 typedef struct tagQMSG
19 DWORD extraInfo; /* Only in 3.1 */
21 struct tagQMSG *nextMsg;
22 struct tagQMSG *prevMsg;
26 typedef struct tagSMSG
28 struct tagSMSG *nextProcessing; /* next SMSG in the processing list */
29 struct tagSMSG *nextPending; /* next SMSG in the pending list */
30 struct tagSMSG *nextWaiting; /* next SMSG in the waiting list */
32 HQUEUE16 hSrcQueue; /* sending Queue, (NULL if it didn't wait) */
33 HQUEUE16 hDstQueue; /* destination Queue */
35 HWND hWnd; /* destinantion window */
36 UINT msg; /* message sent */
37 WPARAM wParam; /* wParam of the sent message */
38 LPARAM lParam; /* lParam of the sent message */
40 LRESULT lResult; /* result of SendMessage */
41 WORD flags; /* see below SMSG_XXXX */
45 /* SMSG -> flags values */
46 /* set when lResult contains a good value */
47 #define SMSG_HAVE_RESULT 0x0001
48 /* protection for multiple call to ReplyMessage16() */
49 #define SMSG_ALREADY_REPLIED 0x0002
50 /* use with EARLY_REPLY for forcing the receiver to clean SMSG */
51 #define SMSG_RECEIVER_CLEANS 0x0010
52 /* used with EARLY_REPLY to indicate to sender, receiver is done with SMSG */
53 #define SMSG_RECEIVED 0x0020
54 /* set in ReceiveMessage() to indicate it's not an early reply */
55 #define SMSG_SENDING_REPLY 0x0040
56 /* set when ReplyMessage16() is called by the application */
57 #define SMSG_EARLY_REPLY 0x0080
58 /* set when sender is Win32 thread */
59 #define SMSG_WIN32 0x1000
60 /* set when sender is a unnicode thread */
61 #define SMSG_UNICODE 0x2000
63 /* Per-queue data for the message queue
64 * Note that we currently only store the current values for
65 * Active, Capture and Focus windows currently.
66 * It might be necessary to store a pointer to the system message queue
67 * as well since windows 9x maintains per thread system message queues
69 typedef struct tagPERQUEUEDATA
71 HWND hWndFocus; /* Focus window */
72 HWND hWndActive; /* Active window */
73 HWND hWndCapture; /* Capture window */
74 INT16 nCaptureHT; /* Capture info (hit-test) */
75 ULONG ulRefCount; /* Reference count */
76 CRITICAL_SECTION cSection; /* Critical section for thread safe access */
80 typedef struct tagMESSAGEQUEUE
82 HQUEUE16 next; /* Next queue */
83 HQUEUE16 self; /* Handle to self (was: reserved) */
84 THDB* thdb; /* Thread owning queue */
85 HANDLE hEvent; /* Event handle */
86 CRITICAL_SECTION cSection; /* Queue access critical section */
88 DWORD magic; /* magic number should be QUEUE_MAGIC */
89 DWORD lockCount; /* reference counter */
90 WORD wWinVersion; /* Expected Windows version */
92 WORD msgCount; /* Number of waiting messages */
93 QMSG* firstMsg; /* First message in linked list */
94 QMSG* lastMsg; /* Last message in linked list */
96 WORD wPostQMsg; /* PostQuitMessage flag */
97 WORD wExitCode; /* PostQuitMessage exit code */
98 WORD wPaintCount; /* Number of WM_PAINT needed */
99 WORD wTimerCount; /* Number of timers for this task */
101 WORD changeBits; /* Changed wake-up bits */
102 WORD wakeBits; /* Queue wake-up bits */
103 WORD wakeMask; /* Queue wake-up mask */
105 DWORD GetMessageTimeVal; /* Value for GetMessageTime */
106 DWORD GetMessagePosVal; /* Value for GetMessagePos */
107 DWORD GetMessageExtraInfoVal; /* Value for GetMessageExtraInfo */
109 SMSG* smWaiting; /* SendMessage waiting for reply */
110 SMSG* smProcessing; /* SendMessage currently being processed */
111 SMSG* smPending; /* SendMessage waiting to be received */
113 HANDLE16 hCurHook; /* Current hook */
114 HANDLE16 hooks[WH_NB_HOOKS]; /* Task hooks list */
116 PERQUEUEDATA *pQData; /* pointer to (shared) PERQUEUEDATA structure */
121 /* Extra (undocumented) queue wake bits - see "Undoc. Windows" */
122 #define QS_SMRESULT 0x8000 /* Queue has a SendMessage() result */
124 /* Types of SMSG stack */
125 #define SM_PROCESSING_LIST 1 /* list of SM currently being processed */
126 #define SM_PENDING_LIST 2 /* list of SM wating to be received */
127 #define SM_WAITING_LIST 3 /* list of SM waiting for reply */
129 #define QUEUE_MAGIC 0xD46E80AF
131 /* Per queue data management methods */
132 PERQUEUEDATA* PERQDATA_CreateInstance( void );
133 ULONG PERQDATA_Addref( PERQUEUEDATA* pQData );
134 ULONG PERQDATA_Release( PERQUEUEDATA* pQData );
135 HWND PERQDATA_GetFocusWnd( PERQUEUEDATA *pQData );
136 HWND PERQDATA_SetFocusWnd( PERQUEUEDATA *pQData, HWND hWndFocus );
137 HWND PERQDATA_GetActiveWnd( PERQUEUEDATA *pQData );
138 HWND PERQDATA_SetActiveWnd( PERQUEUEDATA *pQData, HWND hWndActive );
139 HWND PERQDATA_GetCaptureWnd( PERQUEUEDATA *pQData );
140 HWND PERQDATA_SetCaptureWnd( PERQUEUEDATA *pQData, HWND hWndCapture );
141 INT16 PERQDATA_GetCaptureInfo( PERQUEUEDATA *pQData );
142 INT16 PERQDATA_SetCaptureInfo( PERQUEUEDATA *pQData, INT16 nCaptureHT );
144 /* Message queue management methods */
145 extern MESSAGEQUEUE *QUEUE_Lock( HQUEUE16 hQueue );
146 extern void QUEUE_Unlock( MESSAGEQUEUE *queue );
147 extern void QUEUE_DumpQueue( HQUEUE16 hQueue );
148 extern void QUEUE_WalkQueues(void);
149 extern BOOL QUEUE_IsExitingQueue( HQUEUE16 hQueue );
150 extern void QUEUE_SetExitingQueue( HQUEUE16 hQueue );
151 extern MESSAGEQUEUE *QUEUE_GetSysQueue(void);
152 extern void QUEUE_SetWakeBit( MESSAGEQUEUE *queue, WORD bit );
153 extern void QUEUE_ClearWakeBit( MESSAGEQUEUE *queue, WORD bit );
154 extern void QUEUE_ReceiveMessage( MESSAGEQUEUE *queue );
155 extern int QUEUE_WaitBits( WORD bits, DWORD timeout );
156 extern void QUEUE_IncPaintCount( HQUEUE16 hQueue );
157 extern void QUEUE_DecPaintCount( HQUEUE16 hQueue );
158 extern void QUEUE_IncTimerCount( HQUEUE16 hQueue );
159 extern void QUEUE_DecTimerCount( HQUEUE16 hQueue );
160 extern BOOL QUEUE_CreateSysMsgQueue( int size );
161 extern BOOL QUEUE_DeleteMsgQueue( HQUEUE16 hQueue );
162 extern HTASK16 QUEUE_GetQueueTask( HQUEUE16 hQueue );
163 extern BOOL QUEUE_AddMsg( HQUEUE16 hQueue, MSG * msg, DWORD extraInfo );
164 extern QMSG* QUEUE_FindMsg( MESSAGEQUEUE * msgQueue, HWND hwnd,
165 int first, int last );
166 extern void QUEUE_RemoveMsg( MESSAGEQUEUE * msgQueue, QMSG *qmsg );
167 extern SMSG *QUEUE_RemoveSMSG( MESSAGEQUEUE *queue, int list, SMSG *smsg );
168 extern BOOL QUEUE_AddSMSG( MESSAGEQUEUE *queue, int list, SMSG *smsg );
169 extern void hardware_event( WORD message, WORD wParam, LONG lParam,
170 int xPos, int yPos, DWORD time, DWORD extraInfo );
172 extern HQUEUE16 WINAPI InitThreadInput16( WORD unknown, WORD flags );
174 #endif /* __WINE_QUEUE_H */