1 /* -*- tab-width: 8; c-basic-offset: 4 -*- */
6 * Copyright 1997 Alexandre Julliard
7 * Copyright 1997 Len White
8 * Copyright 1999 Keith Matthews
10 * Copyright 2001 Eric Pouech
13 #ifndef __WINE_DDEML_PRIVATE_H
14 #define __WINE_DDEML_PRIVATE_H
16 /* defined in atom.c file.
18 #define MAX_ATOM_LEN 255
20 /* Maximum buffer size ( including the '\0' ).
22 #define MAX_BUFFER_LEN (MAX_ATOM_LEN + 1)
24 /* The internal structures (prefixed by WDML) are used as follows:
25 * + a WDML_INSTANCE is created for each instance creation (DdeInitialize)
26 * - a popup window (InstanceClass) is created for each instance.
27 * - this window is used to receive all the DDEML events (server registration,
28 * conversation confirmation...). See the WM_WDML_???? messages for details
29 * + when registring a server (DdeNameService) a WDML_SERVER is created
30 * - a popup window (ServerNameClass) is created
31 * + a conversation is represented by two WDML_CONV structures:
32 * - one on the client side, the other one on the server side
33 * - this is needed because the address spaces may be different
34 * - therefore, two lists of links are kept for each instance
35 * - two windows are created for a conversation:
36 * o a popup window on client side (ClientConvClass)
37 * o a child window (of the ServerName) on the server side
39 * - all the exchanges then take place between those two windows
40 * - windows for the conversation exist in two forms (Ansi & Unicode). This
41 * is only needed when a partner in a conv is not handled by DDEML. The
42 * type (A/W) of the window is used to handle the ansi <=> unicode
44 * - two handles are created for a conversation (on each side). Each handle
45 * is linked to a structure. To help differentiate those handles, the
46 * local one has an even value, whereas the remote one has an odd value.
47 * + a (warm or link) is represented by two WDML_LINK structures:
48 * - one on client side, the other one on server side
49 * - therefore, two lists of links are kept for each instance
51 * To help getting back to data, WDML windows store information:
52 * - offset 0: the DDE instance
53 * - offset 4: the current conversation (for ClientConv and ServerConv only)
55 * All the implementation (client & server) makes the assumption that the other side
56 * is not always a DDEML partner. However, if it's the case, supplementary services
57 * are available (most notably the REGISTER/UNREGISTER and CONNECT_CONFIRM messages
58 * to the callback function). To be correct in every situation, all the basic
59 * exchanges are made using the 'pure' DDE protocol. A (future !) enhancement would
60 * be to provide a new protocol in the case were both partners are handled by DDEML.
62 * The StringHandles are in fact stored as local atoms. So an HSZ and a (local) atom
63 * can be used interchangably. However, in order to keep track of the allocated HSZ,
64 * and to free them upon instance termination, all HSZ are stored in a link list.
65 * When the HSZ need to be passed thru DDE messages, we need to convert them back and
66 * forth to global atoms.
69 /* this struct has the same mapping as all the DDE??? structures */
71 unsigned short unused:12,
79 typedef struct tagHSZNode
81 struct tagHSZNode* next;
86 typedef struct tagWDML_SERVER
88 struct tagWDML_SERVER* next;
97 typedef struct tagWDML_XACT {
98 struct tagWDML_XACT* next; /* list of transactions in conversation */
107 ATOM atom; /* as converted from or to hszItem */
109 LPARAM lParam; /* useful for reusing */
112 typedef struct tagWDML_CONV
114 struct tagWDML_CONV* next; /* to link all the conversations */
115 struct tagWDML_INSTANCE* instance;
116 HSZ hszService; /* pmt used for connection */
117 HSZ hszTopic; /* pmt used for connection */
118 UINT afCmd; /* service name flag */
119 CONVCONTEXT convContext;
120 HWND hwndClient; /* source of conversation (ClientConvClass) */
121 HWND hwndServer; /* destination of conversation (ServerConvClass) */
122 WDML_XACT* transactions; /* pending transactions */
123 DWORD hUser; /* user defined value */
124 DWORD wStatus; /* same bits as convinfo.wStatus */
125 DWORD wConvst; /* same values as convinfo.wConvst */
128 /* DDE_LINK struct defines hot, warm, and cold links */
129 typedef struct tagWDML_LINK {
130 struct tagWDML_LINK* next; /* to link all the active links */
131 HCONV hConv; /* to get back to the converstaion */
132 UINT transactionType;/* 0 for no link */
133 HSZ hszItem; /* item targetted for (hot/warm) link */
134 UINT uFmt; /* format for data */
135 HDDEDATA hDdeData; /* data them selves */
138 typedef struct tagWDML_INSTANCE
140 struct tagWDML_INSTANCE* next;
141 DWORD instanceID; /* needed to track monitor usage */
142 DWORD threadID; /* needed to keep instance linked to a unique thread */
143 BOOL monitor; /* have these two as full Booleans cos they'll be tested frequently */
144 BOOL clientOnly; /* bit wasteful of space but it will be faster */
145 BOOL unicode; /* Flag to indicate Win32 API used to initialise */
146 BOOL win16; /* flag to indicate Win16 API used to initialize */
147 HSZNode* nodeList; /* for cleaning upon exit */
148 PFNCALLBACK callback;
153 WDML_SERVER* servers; /* list of registered servers */
154 WDML_CONV* convs[2]; /* active conversations for this instance (client and server) */
155 WDML_LINK* links[2]; /* active links for this instance (client and server) */
158 extern CRITICAL_SECTION WDML_CritSect; /* protection for instance list */
160 /* header for the DDE Data objects */
161 typedef struct tagDDE_DATAHANDLE_HEAD
164 } DDE_DATAHANDLE_HEAD;
166 typedef enum tagWDML_SIDE
168 WDML_CLIENT_SIDE = 0, WDML_SERVER_SIDE = 1
172 WDML_QS_ERROR, WDML_QS_HANDLED, WDML_QS_PASS, WDML_QS_SWALLOWED, WDML_QS_BLOCK,
175 extern HDDEDATA WDML_InvokeCallback(WDML_INSTANCE* pInst, UINT uType, UINT uFmt, HCONV hConv,
176 HSZ hsz1, HSZ hsz2, HDDEDATA hdata,
177 DWORD dwData1, DWORD dwData2);
178 extern HDDEDATA WDML_InvokeCallback16(PFNCALLBACK pfn, UINT uType, UINT uFmt, HCONV hConv,
179 HSZ hsz1, HSZ hsz2, HDDEDATA hdata,
180 DWORD dwData1, DWORD dwData2);
181 extern WDML_SERVER* WDML_AddServer(WDML_INSTANCE* pInstance, HSZ hszService, HSZ hszTopic);
182 extern void WDML_RemoveServer(WDML_INSTANCE* pInstance, HSZ hszService, HSZ hszTopic);
183 extern WDML_SERVER* WDML_FindServer(WDML_INSTANCE* pInstance, HSZ hszService, HSZ hszTopic);
184 /* called both in DdeClientTransaction and server side. */
185 extern UINT WDML_Initialize(LPDWORD pidInst, PFNCALLBACK pfnCallback,
186 DWORD afCmd, DWORD ulRes, BOOL bUnicode, BOOL b16);
187 extern WDML_CONV* WDML_AddConv(WDML_INSTANCE* pInstance, WDML_SIDE side,
188 HSZ hszService, HSZ hszTopic, HWND hwndClient, HWND hwndServer);
189 extern void WDML_RemoveConv(WDML_CONV* pConv, WDML_SIDE side);
190 extern WDML_CONV* WDML_GetConv(HCONV hConv, BOOL checkConnected);
191 extern WDML_CONV* WDML_GetConvFromWnd(HWND hWnd);
192 extern WDML_CONV* WDML_FindConv(WDML_INSTANCE* pInstance, WDML_SIDE side,
193 HSZ hszService, HSZ hszTopic);
194 extern LPARAM WDML_PostAck(WDML_CONV* pConv, WDML_SIDE side, WORD appRetCode,
195 BOOL fBusy, BOOL fAck, ATOM atom, LPARAM lParam, UINT oldMsg);
196 extern void WDML_AddLink(WDML_INSTANCE* pInstance, HCONV hConv, WDML_SIDE side,
197 UINT wType, HSZ hszItem, UINT wFmt);
198 extern WDML_LINK* WDML_FindLink(WDML_INSTANCE* pInstance, HCONV hConv, WDML_SIDE side,
199 HSZ hszItem, UINT uFmt);
200 extern void WDML_RemoveLink(WDML_INSTANCE* pInstance, HCONV hConv, WDML_SIDE side,
201 HSZ hszItem, UINT wFmt);
202 extern void WDML_RemoveAllLinks(WDML_INSTANCE* pInstance, WDML_CONV* pConv, WDML_SIDE side);
203 /* string internals */
204 extern void WDML_FreeAllHSZ(WDML_INSTANCE* pInstance);
205 extern BOOL WDML_DecHSZ(WDML_INSTANCE* pInstance, HSZ hsz);
206 extern BOOL WDML_IncHSZ(WDML_INSTANCE* pInstance, HSZ hsz);
207 extern ATOM WDML_MakeAtomFromHsz(HSZ hsz);
208 extern HSZ WDML_MakeHszFromAtom(WDML_INSTANCE* pInstance, ATOM atom);
209 /* client calls these */
210 extern WDML_XACT* WDML_AllocTransaction(WDML_INSTANCE* pInstance, UINT ddeMsg, UINT wFmt, HSZ hszItem);
211 extern void WDML_QueueTransaction(WDML_CONV* pConv, WDML_XACT* pXAct);
212 extern BOOL WDML_UnQueueTransaction(WDML_CONV* pConv, WDML_XACT* pXAct);
213 extern void WDML_FreeTransaction(WDML_INSTANCE* pInstance, WDML_XACT* pXAct, BOOL doFreePmt);
214 extern WDML_XACT* WDML_FindTransaction(WDML_CONV* pConv, DWORD tid);
215 extern HGLOBAL WDML_DataHandle2Global(HDDEDATA hDdeData, BOOL fResponse, BOOL fRelease,
216 BOOL fDeferUpd, BOOL dAckReq);
217 extern HDDEDATA WDML_Global2DataHandle(HGLOBAL hMem, WINE_DDEHEAD* da);
218 extern WDML_INSTANCE* WDML_GetInstance(DWORD InstId);
219 extern WDML_INSTANCE* WDML_GetInstanceFromWnd(HWND hWnd);
220 /* broadcasting to DDE windows */
221 extern void WDML_BroadcastDDEWindows(const char* clsName, UINT uMsg,
222 WPARAM wParam, LPARAM lParam);
223 extern void WDML_NotifyThreadExit(DWORD tid);
225 static inline void WDML_ExtractAck(WORD status, DDEACK* da)
227 *da = *((DDEACK*)&status);
230 extern const char WDML_szEventClass[]; /* class of window for events (aka instance) */
231 extern const char WDML_szServerConvClassA[]; /* class of window for server side conv (ansi) */
232 extern const WCHAR WDML_szServerConvClassW[]; /* class of window for server side conv (unicode) */
233 extern const char WDML_szClientConvClassA[]; /* class of window for client side conv (ansi) */
234 extern const WCHAR WDML_szClientConvClassW[]; /* class of window for client side conv (unicode) */
236 #define WM_WDML_REGISTER (WM_USER + 0x200)
237 #define WM_WDML_UNREGISTER (WM_USER + 0x201)
238 #define WM_WDML_CONNECT_CONFIRM (WM_USER + 0x202)
240 /* parameters for messages:
242 * Register atom for service name atom for service spec
243 * Unregister atom for service name atom for service spec
244 * ConnectConfirm client window handle server window handle
247 #define GWL_WDML_INSTANCE (0)
248 #define GWL_WDML_CONVERSATION (4)
249 #define GWL_WDML_SERVER (4)
251 #endif /* __WINE_DDEML_PRIVATE_H */