4 * Copyright 1997 Alexandre Julliard
5 * Copyright 1997 Len White
6 * Copyright 1999 Keith Matthews
8 * Copyright 2001 Eric Pouech
10 * This library is free software; you can redistribute it and/or
11 * modify it under the terms of the GNU Lesser General Public
12 * License as published by the Free Software Foundation; either
13 * version 2.1 of the License, or (at your option) any later version.
15 * This library is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18 * Lesser General Public License for more details.
20 * You should have received a copy of the GNU Lesser General Public
21 * License along with this library; if not, write to the Free Software
22 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
25 #ifndef __WINE_DDEML_PRIVATE_H
26 #define __WINE_DDEML_PRIVATE_H
28 /* defined in atom.c file.
30 #define MAX_ATOM_LEN 255
32 /* Maximum buffer size ( including the '\0' ).
34 #define MAX_BUFFER_LEN (MAX_ATOM_LEN + 1)
36 /* The internal structures (prefixed by WDML) are used as follows:
37 * + a WDML_INSTANCE is created for each instance creation (DdeInitialize)
38 * - a popup window (InstanceClass) is created for each instance.
39 * - this window is used to receive all the DDEML events (server registration,
40 * conversation confirmation...). See the WM_WDML_???? messages for details
41 * + when registering a server (DdeNameService) a WDML_SERVER is created
42 * - a popup window (ServerNameClass) is created
43 * + a conversation is represented by two WDML_CONV structures:
44 * - one on the client side, the other one on the server side
45 * - this is needed because the address spaces may be different
46 * - therefore, two lists of links are kept for each instance
47 * - two windows are created for a conversation:
48 * o a popup window on client side (ClientConvClass)
49 * o a child window (of the ServerName) on the server side
51 * - all the exchanges then take place between those two windows
52 * - windows for the conversation exist in two forms (Ansi & Unicode). This
53 * is only needed when a partner in a conv is not handled by DDEML. The
54 * type (A/W) of the window is used to handle the ansi <=> unicode
56 * - two handles are created for a conversation (on each side). Each handle
57 * is linked to a structure. To help differentiate those handles, the
58 * local one has an even value, whereas the remote one has an odd value.
59 * + a (warm or link) is represented by two WDML_LINK structures:
60 * - one on client side, the other one on server side
61 * - therefore, two lists of links are kept for each instance
63 * To help getting back to data, WDML windows store information:
64 * - offset 0: the DDE instance
65 * - offset 4: the current conversation (for ClientConv and ServerConv only)
67 * All the implementation (client & server) makes the assumption that the other side
68 * is not always a DDEML partner. However, if it's the case, supplementary services
69 * are available (most notably the REGISTER/UNREGISTER and CONNECT_CONFIRM messages
70 * to the callback function). To be correct in every situation, all the basic
71 * exchanges are made using the 'pure' DDE protocol. A (future !) enhancement would
72 * be to provide a new protocol in the case were both partners are handled by DDEML.
74 * The StringHandles are in fact stored as local atoms. So an HSZ and a (local) atom
75 * can be used interchangably. However, in order to keep track of the allocated HSZ,
76 * and to free them upon instance termination, all HSZ are stored in a link list.
77 * When the HSZ need to be passed thru DDE messages, we need to convert them back and
78 * forth to global atoms.
81 /* this struct has the same mapping as all the DDE??? structures */
83 unsigned short unused:12,
91 typedef struct tagHSZNode
93 struct tagHSZNode* next;
98 typedef struct tagWDML_SERVER
100 struct tagWDML_SERVER* next;
104 ATOM atomServiceSpec;
109 typedef struct tagWDML_XACT {
110 struct tagWDML_XACT* next; /* list of transactions in conversation */
119 ATOM atom; /* as converted from or to hszItem */
121 LPARAM lParam; /* useful for reusing */
124 typedef struct tagWDML_CONV
126 struct tagWDML_CONV* next; /* to link all the conversations */
127 struct tagWDML_INSTANCE* instance;
128 HSZ hszService; /* pmt used for connection */
129 HSZ hszTopic; /* pmt used for connection */
130 UINT magic; /* magic number to check validity */
131 UINT afCmd; /* service name flag */
132 CONVCONTEXT convContext;
133 HWND hwndClient; /* source of conversation (ClientConvClass) */
134 HWND hwndServer; /* destination of conversation (ServerConvClass) */
135 WDML_XACT* transactions; /* pending transactions */
136 DWORD hUser; /* user defined value */
137 DWORD wStatus; /* same bits as convinfo.wStatus */
138 DWORD wConvst; /* same values as convinfo.wConvst */
141 #define WDML_CONV_MAGIC 0xbabe1234
143 /* DDE_LINK struct defines hot, warm, and cold links */
144 typedef struct tagWDML_LINK {
145 struct tagWDML_LINK* next; /* to link all the active links */
146 HCONV hConv; /* to get back to the conversation */
147 UINT transactionType;/* 0 for no link */
148 HSZ hszItem; /* item targetted for (hot/warm) link */
149 UINT uFmt; /* format for data */
152 typedef struct tagWDML_INSTANCE
154 struct tagWDML_INSTANCE* next;
155 DWORD instanceID; /* needed to track monitor usage */
156 DWORD threadID; /* needed to keep instance linked to a unique thread */
157 BOOL monitor; /* have these two as full Booleans cos they'll be tested frequently */
158 BOOL clientOnly; /* bit wasteful of space but it will be faster */
159 BOOL unicode; /* Flag to indicate Win32 API used to initialise */
160 BOOL win16; /* flag to indicate Win16 API used to initialize */
161 HSZNode* nodeList; /* for cleaning upon exit */
162 PFNCALLBACK callback;
167 DWORD wStatus; /* global instance status */
168 WDML_SERVER* servers; /* list of registered servers */
169 WDML_CONV* convs[2]; /* active conversations for this instance (client and server) */
170 WDML_LINK* links[2]; /* active links for this instance (client and server) */
173 /* header for the DDE Data objects */
174 typedef struct tagDDE_DATAHANDLE_HEAD
178 } DDE_DATAHANDLE_HEAD;
180 typedef enum tagWDML_SIDE
182 WDML_CLIENT_SIDE = 0, WDML_SERVER_SIDE = 1
186 WDML_QS_ERROR, WDML_QS_HANDLED, WDML_QS_PASS, WDML_QS_SWALLOWED, WDML_QS_BLOCK,
189 extern HDDEDATA WDML_InvokeCallback(WDML_INSTANCE* pInst, UINT uType, UINT uFmt, HCONV hConv,
190 HSZ hsz1, HSZ hsz2, HDDEDATA hdata,
191 ULONG_PTR dwData1, ULONG_PTR dwData2) DECLSPEC_HIDDEN;
192 extern HDDEDATA WDML_InvokeCallback16(PFNCALLBACK pfn, UINT uType, UINT uFmt, HCONV hConv,
193 HSZ hsz1, HSZ hsz2, HDDEDATA hdata,
194 DWORD dwData1, DWORD dwData2) DECLSPEC_HIDDEN;
195 extern WDML_SERVER* WDML_AddServer(WDML_INSTANCE* pInstance, HSZ hszService, HSZ hszTopic) DECLSPEC_HIDDEN;
196 extern void WDML_RemoveServer(WDML_INSTANCE* pInstance, HSZ hszService, HSZ hszTopic) DECLSPEC_HIDDEN;
197 extern WDML_SERVER* WDML_FindServer(WDML_INSTANCE* pInstance, HSZ hszService, HSZ hszTopic) DECLSPEC_HIDDEN;
198 /* transaction handler on the server side */
199 extern WDML_QUEUE_STATE WDML_ServerHandle(WDML_CONV* pConv, WDML_XACT* pXAct) DECLSPEC_HIDDEN;
200 /* transaction handler on the client side */
201 HDDEDATA WDML_ClientHandle(WDML_CONV *pConv, WDML_XACT *pXAct, DWORD dwTimeout, LPDWORD pdwResult) DECLSPEC_HIDDEN;
202 /* called both in DdeClientTransaction and server side. */
203 extern UINT WDML_Initialize(LPDWORD pidInst, PFNCALLBACK pfnCallback,
204 DWORD afCmd, DWORD ulRes, BOOL bUnicode, BOOL b16) DECLSPEC_HIDDEN;
205 extern WDML_CONV* WDML_AddConv(WDML_INSTANCE* pInstance, WDML_SIDE side,
206 HSZ hszService, HSZ hszTopic, HWND hwndClient, HWND hwndServer) DECLSPEC_HIDDEN;
207 extern void WDML_RemoveConv(WDML_CONV* pConv, WDML_SIDE side) DECLSPEC_HIDDEN;
208 extern WDML_CONV* WDML_GetConv(HCONV hConv, BOOL checkConnected) DECLSPEC_HIDDEN;
209 extern WDML_CONV* WDML_GetConvFromWnd(HWND hWnd) DECLSPEC_HIDDEN;
210 extern WDML_CONV* WDML_FindConv(WDML_INSTANCE* pInstance, WDML_SIDE side,
211 HSZ hszService, HSZ hszTopic) DECLSPEC_HIDDEN;
212 extern BOOL WDML_PostAck(WDML_CONV* pConv, WDML_SIDE side, WORD appRetCode,
213 BOOL fBusy, BOOL fAck, UINT_PTR pmt, LPARAM lParam, UINT oldMsg) DECLSPEC_HIDDEN;
214 extern void WDML_AddLink(WDML_INSTANCE* pInstance, HCONV hConv, WDML_SIDE side,
215 UINT wType, HSZ hszItem, UINT wFmt) DECLSPEC_HIDDEN;
216 extern WDML_LINK* WDML_FindLink(WDML_INSTANCE* pInstance, HCONV hConv, WDML_SIDE side,
217 HSZ hszItem, BOOL use_fmt, UINT uFmt) DECLSPEC_HIDDEN;
218 extern void WDML_RemoveLink(WDML_INSTANCE* pInstance, HCONV hConv, WDML_SIDE side,
219 HSZ hszItem, UINT wFmt) DECLSPEC_HIDDEN;
220 extern void WDML_RemoveAllLinks(WDML_INSTANCE* pInstance, WDML_CONV* pConv, WDML_SIDE side) DECLSPEC_HIDDEN;
221 /* string internals */
222 extern void WDML_FreeAllHSZ(WDML_INSTANCE* pInstance) DECLSPEC_HIDDEN;
223 extern BOOL WDML_DecHSZ(WDML_INSTANCE* pInstance, HSZ hsz) DECLSPEC_HIDDEN;
224 extern BOOL WDML_IncHSZ(WDML_INSTANCE* pInstance, HSZ hsz) DECLSPEC_HIDDEN;
225 extern ATOM WDML_MakeAtomFromHsz(HSZ hsz) DECLSPEC_HIDDEN;
226 extern HSZ WDML_MakeHszFromAtom(const WDML_INSTANCE* pInstance, ATOM atom) DECLSPEC_HIDDEN;
227 /* client calls these */
228 extern WDML_XACT* WDML_AllocTransaction(WDML_INSTANCE* pInstance, UINT ddeMsg, UINT wFmt, HSZ hszItem) DECLSPEC_HIDDEN;
229 extern void WDML_QueueTransaction(WDML_CONV* pConv, WDML_XACT* pXAct) DECLSPEC_HIDDEN;
230 extern BOOL WDML_UnQueueTransaction(WDML_CONV* pConv, WDML_XACT* pXAct) DECLSPEC_HIDDEN;
231 extern void WDML_FreeTransaction(WDML_INSTANCE* pInstance, WDML_XACT* pXAct, BOOL doFreePmt) DECLSPEC_HIDDEN;
232 extern WDML_XACT* WDML_FindTransaction(WDML_CONV* pConv, DWORD tid) DECLSPEC_HIDDEN;
233 extern HGLOBAL WDML_DataHandle2Global(HDDEDATA hDdeData, BOOL fResponse, BOOL fRelease,
234 BOOL fDeferUpd, BOOL dAckReq) DECLSPEC_HIDDEN;
235 extern HDDEDATA WDML_Global2DataHandle(HGLOBAL hMem, WINE_DDEHEAD* da) DECLSPEC_HIDDEN;
236 extern BOOL WDML_IsAppOwned(HDDEDATA hDdeData) DECLSPEC_HIDDEN;
237 extern WDML_INSTANCE* WDML_GetInstance(DWORD InstId) DECLSPEC_HIDDEN;
238 extern WDML_INSTANCE* WDML_GetInstanceFromWnd(HWND hWnd) DECLSPEC_HIDDEN;
239 /* broadcasting to DDE windows */
240 extern void WDML_BroadcastDDEWindows(LPCWSTR clsName, UINT uMsg,
241 WPARAM wParam, LPARAM lParam) DECLSPEC_HIDDEN;
242 extern void WDML_NotifyThreadExit(DWORD tid) DECLSPEC_HIDDEN;
244 static inline void WDML_ExtractAck(WORD status, DDEACK* da)
246 *da = *((DDEACK*)&status);
249 extern const WCHAR WDML_szEventClass[] DECLSPEC_HIDDEN; /* class of window for events (aka instance) */
250 extern const char WDML_szServerConvClassA[] DECLSPEC_HIDDEN; /* ANSI class of window for server side conv */
251 extern const WCHAR WDML_szServerConvClassW[] DECLSPEC_HIDDEN; /* unicode class of window for server side conv */
252 extern const char WDML_szClientConvClassA[] DECLSPEC_HIDDEN; /* ANSI class of window for client side conv */
253 extern const WCHAR WDML_szClientConvClassW[] DECLSPEC_HIDDEN; /* unicode class of window for client side conv */
255 #define WM_WDML_REGISTER (WM_USER + 0x200)
256 #define WM_WDML_UNREGISTER (WM_USER + 0x201)
257 #define WM_WDML_CONNECT_CONFIRM (WM_USER + 0x202)
259 /* parameters for messages:
261 * Register atom for service name atom for service spec
262 * Unregister atom for service name atom for service spec
263 * ConnectConfirm client window handle server window handle
266 #define GWL_WDML_INSTANCE (0)
267 #define GWL_WDML_CONVERSATION (sizeof(ULONG_PTR))
268 #define GWL_WDML_SERVER (sizeof(ULONG_PTR))
270 #endif /* __WINE_DDEML_PRIVATE_H */