1 /***************************************************************************
2 * Copyright 1995, Technion, Israel Institute of Technology
3 * Electrical Eng, Software Lab.
4 * Author: Michael Veksler.
5 ***************************************************************************
7 * Purpose : DDE signals and processes functionality for DDE
8 ***************************************************************************
12 #if defined(__FreeBSD__) || defined(__NetBSD__)
24 #include "shm_semaph.h"
25 #include "shm_main_blk.h"
33 int curr_proc_idx= -1;
35 enum stop_wait_op stop_wait_op=CONT;
37 sigjmp_buf env_get_ack;
38 sigjmp_buf env_wait_x;
40 #define IDX_TO_HWND(idx) (0xfffe - (idx))
41 #define HWND_TO_IDX(wnd) (0xfffe - (wnd))
42 #define DDE_WIN_INFO(win) ( main_block->windows[HWND_TO_IDX(win)] )
43 #define DDE_WIN2PROC(win) ( DDE_WIN_INFO(win).proc_idx )
44 #define DDE_IsRemoteWindow(win) ( (win)<0xffff && (win)>=(0xffff-DDE_PROCS))
48 #define DDE_MSG_SIZE sizeof(MSG16)
49 #define FREE_WND (WORD)(-2)
50 #define DELETED_WND (WORD)(-3)
51 #if defined(DEBUG_MSG) || defined(DEBUG_RUNTIME)
52 static char *msg_type[4]={"********", "DDE_SEND", "DDE_POST", "DDE_ACK"};
57 char filler[DDE_MSG_SIZE];
60 typedef struct fifo_element {
62 struct fifo_element *next;
66 fifo_element *first; /* first element in the fifo or NULL */
67 fifo_element *last; /* last element in the fifo or NULL */
69 static struct fifo fifo = {NULL,NULL};
71 void dde_proc_delete(int proc_idx);
73 void dde_proc_add_fifo(int val)
75 fifo_element *created;
77 created= (fifo_element*) xmalloc( sizeof(fifo_element) );
84 fifo.last->next= created;
88 /* get an item from the fifo, and return it.
89 * If fifo is empty, return -1
91 int dde_proc_shift_fifo()
94 fifo_element *deleted;
96 if (fifo.first == NULL)
101 fifo.first= deleted->next;
102 if (fifo.first == NULL)
109 static void print_dde_message(char *desc, MSG16 *msg);
111 /* This should be run only when main_block is first allocated. */
112 void dde_proc_init(dde_proc proc)
116 for (proc_num=0 ; proc_num<DDE_PROCS ; proc_num++, proc++) {
124 /* add current process to the list of processes */
125 void dde_proc_add(dde_proc procs)
129 dprintf_dde(stddeb,"dde_proc_add(..)\n");
130 shm_write_wait(main_block->sem);
132 /* find free proc_idx and allocate it */
133 for (proc_idx=0, proc=procs ; proc_idx<DDE_PROCS ; proc_idx++, proc++)
137 if (proc_idx<DDE_PROCS) { /* got here beacuse a free was found ? */
138 dde_msg_setup(&proc->msg);
140 curr_proc_idx=proc_idx;
141 shm_sem_init(&proc->sem);
145 fprintf(stderr,"dde_proc_add: Can't allocate process\n");
147 shm_write_signal(main_block->sem);
150 /* wait for dde - acknowledge message - or timout */
151 static BOOL get_ack()
153 struct timeval timeout;
155 struct msg_dat ack_buff;
157 /* timeout after exactly one seconf */
161 sigsetjmp(env_get_ack, 1);
162 /* get here after normal execution, or after siglongjmp */
164 do { /* loop to wait for DDE_ACK */
166 stop_wait_op=CONT; /* sensitive code: disallow siglongjmp */
167 size= msgrcv( main_block->proc[curr_proc_idx].msg , &ack_buff.dat,
168 1, DDE_ACK, IPC_NOWAIT);
170 dprintf_msg(stddeb,"get_ack: received DDE_ACK message\n");
173 if (DDE_GetRemoteMessage()) {
174 had_SIGUSR2=1; /* might have recieved SIGUSR2 */
176 stop_wait_op=STOP_WAIT_ACK; /* allow siglongjmp */
178 } while (had_SIGUSR2); /* loop if SIGUSR2 was recieved */
180 /* siglongjmp should be enabled at this moment */
181 select( 0, NULL, NULL, NULL, &timeout );
182 stop_wait_op=CONT; /* disallow further siglongjmp */
184 /* timeout !! (otherwise there would have been a siglongjmp) */
188 /* Transfer one message to a given process */
189 static BOOL DDE_DoOneMessage (int proc_idx, int size, struct msgbuf *msgbuf)
191 dde_proc proc= &main_block->proc[ proc_idx ];
194 if (proc_idx == curr_proc_idx)
197 if (kill(proc->pid,0) < 0) {
198 /* pid does not exist, or not our */
199 dde_proc_delete(proc_idx);
204 MSG16 *msg=(MSG16*) &msgbuf->mtext;
206 if (msgbuf->mtype==DDE_SEND)
207 title="sending dde:";
208 else if (msgbuf->mtype==DDE_POST)
209 title="posting dde:";
213 print_dde_message(title, msg);
215 fprintf(stddeb,"Unknown message type=0x%lx\n",msgbuf->mtype);
218 "DDE_DoOneMessage: to proc_idx=%d (pid=%d), queue=%u\n",
219 proc_idx, proc->pid, (unsigned)proc->msg);
220 if ( proc->msg != -1) {
221 dprintf_msg(stddeb, "DDE_DoOneMessage: doing...(type=%s)\n",
222 msg_type[msgbuf->mtype]);
223 size=msgsnd (proc->msg, msgbuf, size, 0);
229 kill(proc->pid,SIGUSR2); /* tell the process there is a message */
231 dprintf_msg(stddeb,"DDE_DoOneMessage: "
232 "Trying to get acknowledgment from msg queue=%d\n",
234 Yield(); /* force task switch, and */
235 /* acknowledgment sending */
240 fprintf(stderr,"get_ack: DDE_DoOneMessage: timeout\n");
245 dprintf_msg(stddeb,"DDE_DoOneMessage: message not sent, "
246 "target has no message queue\n");
251 /* Do some sort of premitive hash table */
252 static HWND HWND_Local2Remote(HWND orig)
257 WND_DATA *deleted= NULL;
260 dde_wnd_idx= orig % DDE_WINDOWS;
261 for ( i=0 ; i < DDE_WINDOWS ; i++, dde_wnd_idx++) {
262 if (dde_wnd_idx >= DDE_WINDOWS)
263 dde_wnd_idx -= DDE_WINDOWS; /* wrap-around */
265 tested= &main_block->windows[ dde_wnd_idx ];
266 if (tested->proc_idx == FREE_WND)
269 if (deleted == NULL && tested->proc_idx == DELETED_WND) {
271 deleted_idx= dde_wnd_idx;
272 } else if (tested->wnd == orig && tested->proc_idx == curr_proc_idx) {
273 return IDX_TO_HWND(dde_wnd_idx);
276 if (deleted != NULL) { /* deleted is preferable */
277 /* free item, allocate it */
278 deleted->proc_idx= curr_proc_idx;
280 return IDX_TO_HWND(deleted_idx);
282 if (tested->proc_idx == FREE_WND) {
283 tested->proc_idx= curr_proc_idx;
285 return IDX_TO_HWND(dde_wnd_idx);
289 "HWND_Local2Remote: Can't map any more windows to DDE windows\n");
293 static BOOL DDE_DoMessage( MSG16 *msg, int type )
297 MSG16 *remote_message;
298 struct msg_dat msg_dat;
301 if (msg->wParam == 0)
304 if (main_block==NULL) {
305 if (msg->message >= WM_DDE_FIRST && msg->message <= WM_DDE_LAST)
312 if (msg->wParam == (HWND)-1)
315 if ( ! DDE_IsRemoteWindow(msg->hwnd) && msg->hwnd!= (HWND)-1)
318 dprintf_msg(stddeb, "%s: DDE_DoMessage(hwnd=0x%x,msg=0x%x,..)\n",
319 msg_type[type], (int)msg->hwnd,(int)msg->message);
323 "DDE_DoMessage(hwnd=0x%x,msg=0x%x,..) // HWND_BROADCAST !\n",
324 (int)msg->hwnd,(int)msg->message);
325 remote_message=(void*)&msg_dat.dat.mtext;
327 memcpy(remote_message, msg, sizeof(*msg));
328 remote_message->wParam= HWND_Local2Remote(msg->wParam);
329 if (remote_message->wParam == 0)
332 msg_dat.dat.mtype=type;
334 if (msg->hwnd == (HWND)-1) {
336 for ( proc_idx=0; proc_idx < DDE_PROCS ; proc_idx++) {
337 if (proc_idx == curr_proc_idx)
339 if (main_block->proc[ proc_idx ].msg != -1)
340 success|=DDE_DoOneMessage(proc_idx, DDE_MSG_SIZE, &msg_dat.dat);
344 return DDE_DoOneMessage(DDE_WIN2PROC(msg->hwnd), DDE_MSG_SIZE,
349 BOOL DDE_SendMessage( MSG16 *msg)
351 return DDE_DoMessage(msg, DDE_SEND);
354 BOOL DDE_PostMessage( MSG16 *msg)
356 return DDE_DoMessage(msg, DDE_POST);
360 void dde_proc_send_ack(HWND wnd, BOOL val) {
363 static struct msgbuf msg_ack={DDE_ACK,{'0'}};
365 proc=DDE_WIN2PROC(wnd);
366 msg=main_block->proc[proc].msg;
367 dprintf_msg(stddeb,"DDE_GetRemoteMessage: sending ACK "
368 "to wnd=%4x, proc=%d,msg=%d, pid=%d\n",wnd,proc,msg,
369 main_block->proc[proc].pid
372 msg_ack.mtext[0]=val;
373 msgsnd (msg, &msg_ack, 1, 0);
374 kill(main_block->proc[proc].pid, SIGUSR2);
377 /* return true (non zero) if had a remote message */
378 #undef DDE_GetRemoteMessage
380 int DDE_GetRemoteMessage()
382 static int nesting=0; /* to avoid infinite recursion */
384 MSG16 *remote_message;
386 struct msg_dat msg_dat;
387 BOOL was_sent; /* sent/received */
391 if (curr_proc_idx==-1) /* do we have DDE initialized ? */
396 fprintf(stderr,"DDE_GetRemoteMessage: suspecting infinite recursion, exiting");
400 remote_message=(void*)&msg_dat.dat.mtext;
402 /* test for SendMessage */
403 size= msgrcv( main_block->proc[curr_proc_idx].msg , &msg_dat.dat,
404 DDE_MSG_SIZE, DDE_SEND, IPC_NOWAIT);
406 if (size==DDE_MSG_SIZE) { /* is this a correct message (if any) ?*/
409 "DDE:receive sent message. msg=%04x wPar=%04x"
411 remote_message->message, remote_message->wParam,
412 remote_message->lParam);
414 size= msgrcv( main_block->proc[curr_proc_idx].msg , &msg_dat.dat,
415 DDE_MSG_SIZE, DDE_POST, IPC_NOWAIT);
417 if (size==DDE_MSG_SIZE) { /* is this a correct message (if any) ?*/
420 "DDE:receive posted message. "
421 "msg=%04x wPar=%04x lPar=%08lx\n",
422 remote_message->message, remote_message->wParam,
423 remote_message->lParam);
426 return 0; /* no DDE message found */
429 /* At this point we are sure that there is a DDE message,
430 * was_sent is TRUE is the message was sent, and false if it was posted
438 title="receive sent dde:";
440 title="receive posted dde:";
441 print_dde_message(title, remote_message);
444 if (remote_message->hwnd != (HWND) -1 ) {
445 HWND dde_window= DDE_WIN_INFO(remote_message->hwnd).wnd;
446 /* we should know exactly where to send the message (locally)*/
449 "SendMessage(wnd=0x%04x, msg=0x%04x, wPar=0x%04x,"
451 dde_window, remote_message->message,
452 remote_message->wParam, (int)remote_message->lParam);
454 /* execute the recieved message */
455 passed= SendMessage16(dde_window, remote_message->message,
456 remote_message->wParam, remote_message->lParam);
458 /* Tell the sended, that the message is here */
459 dde_proc_send_ack(remote_message->wParam, passed);
462 passed= PostMessage(dde_window, remote_message->message,
463 remote_message->wParam, remote_message->lParam);
464 if (passed == FALSE) {
465 /* Tell the sender, that the message is here, and failed */
466 dde_proc_send_ack(remote_message->wParam, FALSE);
469 /* ack will be sent later, at the first peek/get message */
470 dde_proc_add_fifo(remote_message->wParam);
477 /* iterate through all the windows */
478 for (wndPtr = WIN_FindWndPtr(GetTopWindow(GetDesktopWindow32()));
480 wndPtr = wndPtr->next)
482 if (wndPtr->dwStyle & WS_POPUP || wndPtr->dwStyle & WS_CAPTION) {
484 SendMessage16( wndPtr->hwndSelf, remote_message->message,
485 remote_message->wParam, remote_message->lParam );
487 PostMessage( wndPtr->hwndSelf, remote_message->message,
488 remote_message->wParam, remote_message->lParam );
492 /* replay with DDE_ACK after broadcasting in DDE_GetRemoteMessage */
493 dde_proc_send_ack(remote_message->wParam, TRUE);
503 ack_wnd= dde_proc_shift_fifo();
505 dde_proc_send_ack(ack_wnd, TRUE);
506 usleep(10000); /* force unix task switch */
511 void dde_msg_setup(int *msg_ptr)
513 *msg_ptr= msgget (IPC_PRIVATE, IPC_CREAT | 0700);
515 perror("dde_msg_setup fails to get message queue");
518 /* do we have dde handling in the window ?
519 * If we have, atom usage will make this instance of wine set up
522 void DDE_TestDDE(HWND hwnd)
525 if (in_test++) return;
526 if (main_block != NULL) {
530 dprintf_msg(stddeb,"DDE_TestDDE(0x%04x)\n", hwnd);
533 /* just send a message to see how things are going */
534 SendMessage16( hwnd, WM_DDE_INITIATE, 0, 0);
538 void dde_proc_delete(int proc_idx)
540 dde_proc_done(&main_block->proc[proc_idx]);
542 void stop_wait(int a)
546 switch(stop_wait_op) {
548 siglongjmp(env_get_ack,1);
549 break; /* never reached */
551 siglongjmp(env_wait_x,1);
552 break; /* never reached */
558 static void print_dde_message(char *desc, MSG16 *msg)
560 /* extern const char *MessageTypeNames[];*/
561 extern int debug_last_handle_size;
565 DDEADVISE *ddeadvise;
569 if (is_dde_handle(msg->lParam & 0xffff) )
570 ptr=DDE_AttachHandle(msg->lParam&0xffff, NULL);
573 wStatus=LOWORD(msg->lParam);
574 hWord=HIWORD(msg->lParam);
576 fprintf(stddeb,"%s", desc);
577 fprintf(stddeb,"%04x %04x==%s %04x %08lx ",
578 msg->hwnd, msg->message,"",/*MessageTypeNames[msg->message],*/
579 msg->wParam, msg->lParam);
580 switch(msg->message) {
581 case WM_DDE_INITIATE:
584 case WM_DDE_TERMINATE:
588 /* DDEADVISE: hOptions in WM_DDE_ADVISE message */
591 fprintf(stddeb,"fDeferUpd=%d,fAckReq=%d,cfFormat=0x%x",
592 ddeadvise->fDeferUpd, ddeadvise->fAckReq,
593 ddeadvise->cfFormat);
595 fprintf(stddeb,"NO-DATA");
596 fprintf(stddeb," atom=0x%x",hWord);
599 case WM_DDE_UNADVISE:
600 fprintf(stddeb,"format=0x%x, atom=0x%x",wStatus,hWord);
603 ddeack=(DDEACK*)&wStatus;
604 fprintf(stddeb,"bAppReturnCode=%d,fBusy=%d,fAck=%d",
605 ddeack->bAppReturnCode, ddeack->fBusy, ddeack->fAck);
607 fprintf(stddeb,"(True)");
609 fprintf(stddeb,"(False)");
615 fprintf(stddeb,"fResponse=%d,fRelease=%d,"
616 "fAckReq=%d,cfFormat=0x%x,value=\"%.*s\"",
617 ddedata->fResponse, ddedata->fRelease,
618 ddedata->fAckReq, ddedata->cfFormat,
619 debug_last_handle_size- (int)sizeof(*ddedata)+1,
622 fprintf(stddeb,"NO-DATA");
623 fprintf(stddeb," atom=0x%04x",hWord);
629 fprintf(stddeb,"fRelease=%d,cfFormat=0x%x,value[0]='%c'",
630 ddepoke->fRelease, ddepoke->cfFormat, ddepoke->Value[0]);
632 fprintf(stddeb,"NO-DATA");
633 fprintf(stddeb," atom=0x%04x",hWord);
636 fprintf(stddeb,"\n");
639 void dde_proc_done(dde_proc proc)
642 msgctl(proc->msg, IPC_RMID, NULL);
645 shm_delete_chain(&proc->shmid);
646 shm_sem_done(&proc->sem);
649 /* delete entry, if old junk */
650 void dde_proc_refresh(dde_proc proc)
655 if (kill(proc->pid, 0) != -1)
658 /* get here if entry non empty, and the process does not exist */
666 for (i=0 ; i < DDE_WINDOWS ; i++)
667 main_block->windows[i].proc_idx = FREE_WND;
670 static BOOL DDE_ProcHasWindows(int proc_idx)
675 for ( i=0 ; i < DDE_WINDOWS ; i++) {
676 tested= &main_block->windows[ i ];
678 if (tested->proc_idx == proc_idx)
683 /* Look for hwnd in the hash table of DDE windows,
684 * Delete it from there. If there are no more windows for this
685 * process, remove the process from the DDE data-structure.
686 * If there are no more processes - delete the whole DDE struff.
688 * This is inefficient, but who cares for the efficiency of this rare
691 void DDE_DestroyWindow(HWND hwnd)
697 if (main_block == NULL)
700 dde_wnd_idx= hwnd % DDE_WINDOWS;
702 for ( i=0 ; i < DDE_WINDOWS ; i++, dde_wnd_idx++) {
703 if (dde_wnd_idx >= DDE_WINDOWS)
704 dde_wnd_idx -= DDE_WINDOWS; /* wrap-around */
706 tested= &main_block->windows[ dde_wnd_idx ];
707 if (tested->proc_idx == FREE_WND)
708 return; /* No window will get deleted here */
710 if (tested->wnd == hwnd && tested->proc_idx == curr_proc_idx) {
712 tested->proc_idx= DELETED_WND;
713 if (DDE_ProcHasWindows( curr_proc_idx ))
715 while (dde_reschedule()) /* make sure there are no other */
716 /* processes waiting for acknowledgment */
718 dde_proc_delete( curr_proc_idx );
719 if (DDE_no_of_attached() == 1)
722 shmdt( (void *) main_block);
730 #endif /* CONFIG_IPC */