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urlmon: Correctly handle empty files.
[wine/multimedia.git] / server / queue.c
blob8bf233614594e15c140eb7a0c0720463c23ee028
1 /*
2 * Server-side message queues
3 *
4 * Copyright (C) 2000 Alexandre Julliard
5 *
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
10 *
11 * This library is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
15 *
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with this library; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
19 */
20
21 #include "config.h"
22 #include "wine/port.h"
23
24 #include <assert.h>
25 #include <stdarg.h>
26 #include <stdio.h>
27 #include <stdlib.h>
28
29 #include "ntstatus.h"
30 #define WIN32_NO_STATUS
31 #include "windef.h"
32 #include "winbase.h"
33 #include "wingdi.h"
34 #include "winuser.h"
35 #include "winternl.h"
36
37 #include "handle.h"
38 #include "file.h"
39 #include "thread.h"
40 #include "process.h"
41 #include "request.h"
42 #include "user.h"
43
44 #define WM_NCMOUSEFIRST WM_NCMOUSEMOVE
45 #define WM_NCMOUSELAST (WM_NCMOUSEFIRST+(WM_MOUSELAST-WM_MOUSEFIRST))
46
47 enum message_kind { SEND_MESSAGE, POST_MESSAGE };
48 #define NB_MSG_KINDS (POST_MESSAGE+1)
49
50
51 struct message_result
52 {
53 struct list sender_entry; /* entry in sender list */
54 struct message *msg; /* message the result is for */
55 struct message_result *recv_next; /* next in receiver list */
56 struct msg_queue *sender; /* sender queue */
57 struct msg_queue *receiver; /* receiver queue */
58 int replied; /* has it been replied to? */
59 unsigned int error; /* error code to pass back to sender */
60 lparam_t result; /* reply result */
61 struct message *hardware_msg; /* hardware message if low-level hook result */
62 struct desktop *desktop; /* desktop for hardware message */
63 struct message *callback_msg; /* message to queue for callback */
64 void *data; /* message reply data */
65 unsigned int data_size; /* size of message reply data */
66 struct timeout_user *timeout; /* result timeout */
67 };
68
69 struct message
70 {
71 struct list entry; /* entry in message list */
72 enum message_type type; /* message type */
73 user_handle_t win; /* window handle */
74 unsigned int msg; /* message code */
75 lparam_t wparam; /* parameters */
76 lparam_t lparam; /* parameters */
77 unsigned int time; /* message time */
78 void *data; /* message data for sent messages */
79 unsigned int data_size; /* size of message data */
80 unsigned int unique_id; /* unique id for nested hw message waits */
81 struct message_result *result; /* result in sender queue */
82 };
83
84 struct timer
85 {
86 struct list entry; /* entry in timer list */
87 timeout_t when; /* next expiration */
88 unsigned int rate; /* timer rate in ms */
89 user_handle_t win; /* window handle */
90 unsigned int msg; /* message to post */
91 lparam_t id; /* timer id */
92 lparam_t lparam; /* lparam for message */
93 };
94
95 struct thread_input
96 {
97 struct object obj; /* object header */
98 struct desktop *desktop; /* desktop that this thread input belongs to */
99 user_handle_t focus; /* focus window */
100 user_handle_t capture; /* capture window */
101 user_handle_t active; /* active window */
102 user_handle_t menu_owner; /* current menu owner window */
103 user_handle_t move_size; /* current moving/resizing window */
104 user_handle_t caret; /* caret window */
105 rectangle_t caret_rect; /* caret rectangle */
106 int caret_hide; /* caret hide count */
107 int caret_state; /* caret on/off state */
108 user_handle_t cursor; /* current cursor */
109 int cursor_count; /* cursor show count */
110 struct list msg_list; /* list of hardware messages */
111 unsigned char keystate[256]; /* state of each key */
112 };
113
114 struct msg_queue
115 {
116 struct object obj; /* object header */
117 struct fd *fd; /* optional file descriptor to poll */
118 unsigned int wake_bits; /* wakeup bits */
119 unsigned int wake_mask; /* wakeup mask */
120 unsigned int changed_bits; /* changed wakeup bits */
121 unsigned int changed_mask; /* changed wakeup mask */
122 int paint_count; /* pending paint messages count */
123 int quit_message; /* is there a pending quit message? */
124 int exit_code; /* exit code of pending quit message */
125 int cursor_count; /* per-queue cursor show count */
126 struct list msg_list[NB_MSG_KINDS]; /* lists of messages */
127 struct list send_result; /* stack of sent messages waiting for result */
128 struct list callback_result; /* list of callback messages waiting for result */
129 struct message_result *recv_result; /* stack of received messages waiting for result */
130 struct list pending_timers; /* list of pending timers */
131 struct list expired_timers; /* list of expired timers */
132 lparam_t next_timer_id; /* id for the next timer with a 0 window */
133 struct timeout_user *timeout; /* timeout for next timer to expire */
134 struct thread_input *input; /* thread input descriptor */
135 struct hook_table *hooks; /* hook table */
136 timeout_t last_get_msg; /* time of last get message call */
137 };
138
139 static void msg_queue_dump( struct object *obj, int verbose );
140 static int msg_queue_add_queue( struct object *obj, struct wait_queue_entry *entry );
141 static void msg_queue_remove_queue( struct object *obj, struct wait_queue_entry *entry );
142 static int msg_queue_signaled( struct object *obj, struct thread *thread );
143 static int msg_queue_satisfied( struct object *obj, struct thread *thread );
144 static void msg_queue_destroy( struct object *obj );
145 static void msg_queue_poll_event( struct fd *fd, int event );
146 static void thread_input_dump( struct object *obj, int verbose );
147 static void thread_input_destroy( struct object *obj );
148 static void timer_callback( void *private );
149
150 static const struct object_ops msg_queue_ops =
151 {
152 sizeof(struct msg_queue), /* size */
153 msg_queue_dump, /* dump */
154 no_get_type, /* get_type */
155 msg_queue_add_queue, /* add_queue */
156 msg_queue_remove_queue, /* remove_queue */
157 msg_queue_signaled, /* signaled */
158 msg_queue_satisfied, /* satisfied */
159 no_signal, /* signal */
160 no_get_fd, /* get_fd */
161 no_map_access, /* map_access */
162 default_get_sd, /* get_sd */
163 default_set_sd, /* set_sd */
164 no_lookup_name, /* lookup_name */
165 no_open_file, /* open_file */
166 no_close_handle, /* close_handle */
167 msg_queue_destroy /* destroy */
168 };
169
170 static const struct fd_ops msg_queue_fd_ops =
171 {
172 NULL, /* get_poll_events */
173 msg_queue_poll_event, /* poll_event */
174 NULL, /* flush */
175 NULL, /* get_fd_type */
176 NULL, /* ioctl */
177 NULL, /* queue_async */
178 NULL, /* reselect_async */
179 NULL /* cancel async */
180 };
181
182
183 static const struct object_ops thread_input_ops =
184 {
185 sizeof(struct thread_input), /* size */
186 thread_input_dump, /* dump */
187 no_get_type, /* get_type */
188 no_add_queue, /* add_queue */
189 NULL, /* remove_queue */
190 NULL, /* signaled */
191 NULL, /* satisfied */
192 no_signal, /* signal */
193 no_get_fd, /* get_fd */
194 no_map_access, /* map_access */
195 default_get_sd, /* get_sd */
196 default_set_sd, /* set_sd */
197 no_lookup_name, /* lookup_name */
198 no_open_file, /* open_file */
199 no_close_handle, /* close_handle */
200 thread_input_destroy /* destroy */
201 };
202
203 /* pointer to input structure of foreground thread */
204 static unsigned int last_input_time;
205
206 static void queue_hardware_message( struct desktop *desktop, struct message *msg, int always_queue );
207 static void free_message( struct message *msg );
208
209 /* set the caret window in a given thread input */
210 static void set_caret_window( struct thread_input *input, user_handle_t win )
211 {
212 if (!win || win != input->caret)
213 {
214 input->caret_rect.left = 0;
215 input->caret_rect.top = 0;
216 input->caret_rect.right = 0;
217 input->caret_rect.bottom = 0;
218 }
219 input->caret = win;
220 input->caret_hide = 1;
221 input->caret_state = 0;
222 }
223
224 /* create a thread input object */
225 static struct thread_input *create_thread_input( struct thread *thread )
226 {
227 struct thread_input *input;
228
229 if ((input = alloc_object( &thread_input_ops )))
230 {
231 input->focus = 0;
232 input->capture = 0;
233 input->active = 0;
234 input->menu_owner = 0;
235 input->move_size = 0;
236 input->cursor = 0;
237 input->cursor_count = 0;
238 list_init( &input->msg_list );
239 set_caret_window( input, 0 );
240 memset( input->keystate, 0, sizeof(input->keystate) );
241
242 if (!(input->desktop = get_thread_desktop( thread, 0 /* FIXME: access rights */ )))
243 {
244 release_object( input );
245 return NULL;
246 }
247 }
248 return input;
249 }
250
251 /* create a message queue object */
252 static struct msg_queue *create_msg_queue( struct thread *thread, struct thread_input *input )
253 {
254 struct thread_input *new_input = NULL;
255 struct msg_queue *queue;
256 int i;
257
258 if (!input)
259 {
260 if (!(new_input = create_thread_input( thread ))) return NULL;
261 input = new_input;
262 }
263
264 if ((queue = alloc_object( &msg_queue_ops )))
265 {
266 queue->fd = NULL;
267 queue->wake_bits = 0;
268 queue->wake_mask = 0;
269 queue->changed_bits = 0;
270 queue->changed_mask = 0;
271 queue->paint_count = 0;
272 queue->quit_message = 0;
273 queue->cursor_count = 0;
274 queue->recv_result = NULL;
275 queue->next_timer_id = 0x7fff;
276 queue->timeout = NULL;
277 queue->input = (struct thread_input *)grab_object( input );
278 queue->hooks = NULL;
279 queue->last_get_msg = current_time;
280 list_init( &queue->send_result );
281 list_init( &queue->callback_result );
282 list_init( &queue->pending_timers );
283 list_init( &queue->expired_timers );
284 for (i = 0; i < NB_MSG_KINDS; i++) list_init( &queue->msg_list[i] );
285
286 thread->queue = queue;
287 }
288 if (new_input) release_object( new_input );
289 return queue;
290 }
291
292 /* free the message queue of a thread at thread exit */
293 void free_msg_queue( struct thread *thread )
294 {
295 remove_thread_hooks( thread );
296 if (!thread->queue) return;
297 release_object( thread->queue );
298 thread->queue = NULL;
299 }
300
301 /* change the thread input data of a given thread */
302 static int assign_thread_input( struct thread *thread, struct thread_input *new_input )
303 {
304 struct msg_queue *queue = thread->queue;
305
306 if (!queue)
307 {
308 thread->queue = create_msg_queue( thread, new_input );
309 return thread->queue != NULL;
310 }
311 if (queue->input)
312 {
313 queue->input->cursor_count -= queue->cursor_count;
314 release_object( queue->input );
315 }
316 queue->input = (struct thread_input *)grab_object( new_input );
317 new_input->cursor_count += queue->cursor_count;
318 return 1;
319 }
320
321 /* set the cursor position and queue the corresponding mouse message */
322 static void set_cursor_pos( struct desktop *desktop, int x, int y )
323 {
324 struct hardware_msg_data *msg_data;
325 struct message *msg;
326
327 if (!(msg = mem_alloc( sizeof(*msg) ))) return;
328 if (!(msg_data = mem_alloc( sizeof(*msg_data) )))
329 {
330 free( msg );
331 return;
332 }
333 memset( msg_data, 0, sizeof(*msg_data) );
334
335 msg->type = MSG_HARDWARE;
336 msg->win = 0;
337 msg->msg = WM_MOUSEMOVE;
338 msg->wparam = 0;
339 msg->lparam = 0;
340 msg->time = get_tick_count();
341 msg->result = NULL;
342 msg->data = msg_data;
343 msg->data_size = sizeof(*msg_data);
344 msg_data->x = x;
345 msg_data->y = y;
346 queue_hardware_message( desktop, msg, 1 );
347 }
348
349 /* set the cursor clip rectangle */
350 static void set_clip_rectangle( struct desktop *desktop, const rectangle_t *rect )
351 {
352 rectangle_t top_rect, new_rect;
353 int x, y;
354
355 get_top_window_rectangle( desktop, &top_rect );
356 if (!rect || !intersect_rect( &new_rect, &top_rect, rect )) new_rect = top_rect;
357 desktop->cursor.clip = new_rect;
358 if (desktop->cursor.clip_msg)
359 post_desktop_message( desktop, desktop->cursor.clip_msg, rect != NULL, 0 );
360
361 /* warp the mouse to be inside the clip rect */
362 x = min( max( desktop->cursor.x, desktop->cursor.clip.left ), desktop->cursor.clip.right-1 );
363 y = min( max( desktop->cursor.y, desktop->cursor.clip.top ), desktop->cursor.clip.bottom-1 );
364 if (x != desktop->cursor.x || y != desktop->cursor.y) set_cursor_pos( desktop, x, y );
365 }
366
367 /* change the foreground input and reset the cursor clip rect */
368 static void set_foreground_input( struct desktop *desktop, struct thread_input *input )
369 {
370 if (desktop->foreground_input == input) return;
371 set_clip_rectangle( desktop, NULL );
372 desktop->foreground_input = input;
373 }
374
375 /* get the hook table for a given thread */
376 struct hook_table *get_queue_hooks( struct thread *thread )
377 {
378 if (!thread->queue) return NULL;
379 return thread->queue->hooks;
380 }
381
382 /* set the hook table for a given thread, allocating the queue if needed */
383 void set_queue_hooks( struct thread *thread, struct hook_table *hooks )
384 {
385 struct msg_queue *queue = thread->queue;
386 if (!queue && !(queue = create_msg_queue( thread, NULL ))) return;
387 if (queue->hooks) release_object( queue->hooks );
388 queue->hooks = hooks;
389 }
390
391 /* check the queue status */
392 static inline int is_signaled( struct msg_queue *queue )
393 {
394 return ((queue->wake_bits & queue->wake_mask) || (queue->changed_bits & queue->changed_mask));
395 }
396
397 /* set some queue bits */
398 static inline void set_queue_bits( struct msg_queue *queue, unsigned int bits )
399 {
400 queue->wake_bits |= bits;
401 queue->changed_bits |= bits;
402 if (is_signaled( queue )) wake_up( &queue->obj, 0 );
403 }
404
405 /* clear some queue bits */
406 static inline void clear_queue_bits( struct msg_queue *queue, unsigned int bits )
407 {
408 queue->wake_bits &= ~bits;
409 queue->changed_bits &= ~bits;
410 }
411
412 /* check whether msg is a keyboard message */
413 static inline int is_keyboard_msg( struct message *msg )
414 {
415 return (msg->msg >= WM_KEYFIRST && msg->msg <= WM_KEYLAST);
416 }
417
418 /* check if message is matched by the filter */
419 static inline int check_msg_filter( unsigned int msg, unsigned int first, unsigned int last )
420 {
421 return (msg >= first && msg <= last);
422 }
423
424 /* check whether a message filter contains at least one potential hardware message */
425 static inline int filter_contains_hw_range( unsigned int first, unsigned int last )
426 {
427 /* hardware message ranges are (in numerical order):
428 * WM_NCMOUSEFIRST .. WM_NCMOUSELAST
429 * WM_KEYFIRST .. WM_KEYLAST
430 * WM_MOUSEFIRST .. WM_MOUSELAST
431 */
432 if (last < WM_NCMOUSEFIRST) return 0;
433 if (first > WM_NCMOUSELAST && last < WM_KEYFIRST) return 0;
434 if (first > WM_KEYLAST && last < WM_MOUSEFIRST) return 0;
435 if (first > WM_MOUSELAST) return 0;
436 return 1;
437 }
438
439 /* get the QS_* bit corresponding to a given hardware message */
440 static inline int get_hardware_msg_bit( struct message *msg )
441 {
442 if (msg->msg == WM_MOUSEMOVE || msg->msg == WM_NCMOUSEMOVE) return QS_MOUSEMOVE;
443 if (is_keyboard_msg( msg )) return QS_KEY;
444 return QS_MOUSEBUTTON;
445 }
446
447 /* get the current thread queue, creating it if needed */
448 static inline struct msg_queue *get_current_queue(void)
449 {
450 struct msg_queue *queue = current->queue;
451 if (!queue) queue = create_msg_queue( current, NULL );
452 return queue;
453 }
454
455 /* get a (pseudo-)unique id to tag hardware messages */
456 static inline unsigned int get_unique_id(void)
457 {
458 static unsigned int id;
459 if (!++id) id = 1; /* avoid an id of 0 */
460 return id;
461 }
462
463 /* try to merge a message with the last in the list; return 1 if successful */
464 static int merge_message( struct thread_input *input, const struct message *msg )
465 {
466 struct message *prev;
467 struct list *ptr;
468
469 if (msg->msg != WM_MOUSEMOVE) return 0;
470 if (!(ptr = list_tail( &input->msg_list ))) return 0;
471 prev = LIST_ENTRY( ptr, struct message, entry );
472 if (prev->result) return 0;
473 if (prev->win && msg->win && prev->win != msg->win) return 0;
474 if (prev->msg != msg->msg) return 0;
475 if (prev->type != msg->type) return 0;
476 /* now we can merge it */
477 prev->wparam = msg->wparam;
478 prev->lparam = msg->lparam;
479 prev->time = msg->time;
480 if (msg->type == MSG_HARDWARE && prev->data && msg->data)
481 {
482 struct hardware_msg_data *prev_data = prev->data;
483 struct hardware_msg_data *msg_data = msg->data;
484 prev_data->x = msg_data->x;
485 prev_data->y = msg_data->y;
486 prev_data->info = msg_data->info;
487 }
488 return 1;
489 }
490
491 /* free a result structure */
492 static void free_result( struct message_result *result )
493 {
494 if (result->timeout) remove_timeout_user( result->timeout );
495 free( result->data );
496 if (result->callback_msg) free_message( result->callback_msg );
497 if (result->hardware_msg) free_message( result->hardware_msg );
498 if (result->desktop) release_object( result->desktop );
499 free( result );
500 }
501
502 /* remove the result from the sender list it is on */
503 static inline void remove_result_from_sender( struct message_result *result )
504 {
505 assert( result->sender );
506
507 list_remove( &result->sender_entry );
508 result->sender = NULL;
509 if (!result->receiver) free_result( result );
510 }
511
512 /* store the message result in the appropriate structure */
513 static void store_message_result( struct message_result *res, lparam_t result, unsigned int error )
514 {
515 res->result = result;
516 res->error = error;
517 res->replied = 1;
518 if (res->timeout)
519 {
520 remove_timeout_user( res->timeout );
521 res->timeout = NULL;
522 }
523
524 if (res->hardware_msg)
525 {
526 if (!error && result) /* rejected by the hook */
527 free_message( res->hardware_msg );
528 else
529 queue_hardware_message( res->desktop, res->hardware_msg, 0 );
530
531 res->hardware_msg = NULL;
532 }
533
534 if (res->sender)
535 {
536 if (res->callback_msg)
537 {
538 /* queue the callback message in the sender queue */
539 struct callback_msg_data *data = res->callback_msg->data;
540 data->result = result;
541 list_add_tail( &res->sender->msg_list[SEND_MESSAGE], &res->callback_msg->entry );
542 set_queue_bits( res->sender, QS_SENDMESSAGE );
543 res->callback_msg = NULL;
544 remove_result_from_sender( res );
545 }
546 else
547 {
548 /* wake sender queue if waiting on this result */
549 if (list_head(&res->sender->send_result) == &res->sender_entry)
550 set_queue_bits( res->sender, QS_SMRESULT );
551 }
552 }
553 else if (!res->receiver) free_result( res );
554 }
555
556 /* free a message when deleting a queue or window */
557 static void free_message( struct message *msg )
558 {
559 struct message_result *result = msg->result;
560 if (result)
561 {
562 result->msg = NULL;
563 result->receiver = NULL;
564 store_message_result( result, 0, STATUS_ACCESS_DENIED /*FIXME*/ );
565 }
566 free( msg->data );
567 free( msg );
568 }
569
570 /* remove (and free) a message from a message list */
571 static void remove_queue_message( struct msg_queue *queue, struct message *msg,
572 enum message_kind kind )
573 {
574 list_remove( &msg->entry );
575 switch(kind)
576 {
577 case SEND_MESSAGE:
578 if (list_empty( &queue->msg_list[kind] )) clear_queue_bits( queue, QS_SENDMESSAGE );
579 break;
580 case POST_MESSAGE:
581 if (list_empty( &queue->msg_list[kind] ) && !queue->quit_message)
582 clear_queue_bits( queue, QS_POSTMESSAGE|QS_ALLPOSTMESSAGE );
583 break;
584 }
585 free_message( msg );
586 }
587
588 /* message timed out without getting a reply */
589 static void result_timeout( void *private )
590 {
591 struct message_result *result = private;
592
593 assert( !result->replied );
594
595 result->timeout = NULL;
596
597 if (result->msg) /* not received yet */
598 {
599 struct message *msg = result->msg;
600
601 result->msg = NULL;
602 msg->result = NULL;
603 remove_queue_message( result->receiver, msg, SEND_MESSAGE );
604 result->receiver = NULL;
605 }
606 store_message_result( result, 0, STATUS_TIMEOUT );
607 }
608
609 /* allocate and fill a message result structure */
610 static struct message_result *alloc_message_result( struct msg_queue *send_queue,
611 struct msg_queue *recv_queue,
612 struct message *msg, timeout_t timeout )
613 {
614 struct message_result *result = mem_alloc( sizeof(*result) );
615 if (result)
616 {
617 result->msg = msg;
618 result->sender = send_queue;
619 result->receiver = recv_queue;
620 result->replied = 0;
621 result->data = NULL;
622 result->data_size = 0;
623 result->timeout = NULL;
624 result->hardware_msg = NULL;
625 result->desktop = NULL;
626 result->callback_msg = NULL;
627
628 if (msg->type == MSG_CALLBACK)
629 {
630 struct message *callback_msg = mem_alloc( sizeof(*callback_msg) );
631
632 if (!callback_msg)
633 {
634 free( result );
635 return NULL;
636 }
637 callback_msg->type = MSG_CALLBACK_RESULT;
638 callback_msg->win = msg->win;
639 callback_msg->msg = msg->msg;
640 callback_msg->wparam = 0;
641 callback_msg->lparam = 0;
642 callback_msg->time = get_tick_count();
643 callback_msg->result = NULL;
644 /* steal the data from the original message */
645 callback_msg->data = msg->data;
646 callback_msg->data_size = msg->data_size;
647 msg->data = NULL;
648 msg->data_size = 0;
649
650 result->callback_msg = callback_msg;
651 list_add_head( &send_queue->callback_result, &result->sender_entry );
652 }
653 else if (send_queue) list_add_head( &send_queue->send_result, &result->sender_entry );
654
655 if (timeout != TIMEOUT_INFINITE)
656 result->timeout = add_timeout_user( timeout, result_timeout, result );
657 }
658 return result;
659 }
660
661 /* receive a message, removing it from the sent queue */
662 static void receive_message( struct msg_queue *queue, struct message *msg,
663 struct get_message_reply *reply )
664 {
665 struct message_result *result = msg->result;
666
667 reply->total = msg->data_size;
668 if (msg->data_size > get_reply_max_size())
669 {
670 set_error( STATUS_BUFFER_OVERFLOW );
671 return;
672 }
673 reply->type = msg->type;
674 reply->win = msg->win;
675 reply->msg = msg->msg;
676 reply->wparam = msg->wparam;
677 reply->lparam = msg->lparam;
678 reply->time = msg->time;
679
680 if (msg->data) set_reply_data_ptr( msg->data, msg->data_size );
681
682 list_remove( &msg->entry );
683 /* put the result on the receiver result stack */
684 if (result)
685 {
686 result->msg = NULL;
687 result->recv_next = queue->recv_result;
688 queue->recv_result = result;
689 }
690 free( msg );
691 if (list_empty( &queue->msg_list[SEND_MESSAGE] )) clear_queue_bits( queue, QS_SENDMESSAGE );
692 }
693
694 /* set the result of the current received message */
695 static void reply_message( struct msg_queue *queue, lparam_t result,
696 unsigned int error, int remove, const void *data, data_size_t len )
697 {
698 struct message_result *res = queue->recv_result;
699
700 if (remove)
701 {
702 queue->recv_result = res->recv_next;
703 res->receiver = NULL;
704 if (!res->sender && !res->hardware_msg) /* no one waiting for it */
705 {
706 free_result( res );
707 return;
708 }
709 }
710 if (!res->replied)
711 {
712 if (len && (res->data = memdup( data, len ))) res->data_size = len;
713 store_message_result( res, result, error );
714 }
715 }
716
717 static int match_window( user_handle_t win, user_handle_t msg_win )
718 {
719 if (!win) return 1;
720 if (win == -1 || win == 1) return !msg_win;
721 if (msg_win == win) return 1;
722 return is_child_window( win, msg_win );
723 }
724
725 /* retrieve a posted message */
726 static int get_posted_message( struct msg_queue *queue, user_handle_t win,
727 unsigned int first, unsigned int last, unsigned int flags,
728 struct get_message_reply *reply )
729 {
730 struct message *msg;
731
732 /* check against the filters */
733 LIST_FOR_EACH_ENTRY( msg, &queue->msg_list[POST_MESSAGE], struct message, entry )
734 {
735 if (!match_window( win, msg->win )) continue;
736 if (!check_msg_filter( msg->msg, first, last )) continue;
737 goto found; /* found one */
738 }
739 return 0;
740
741 /* return it to the app */
742 found:
743 reply->total = msg->data_size;
744 if (msg->data_size > get_reply_max_size())
745 {
746 set_error( STATUS_BUFFER_OVERFLOW );
747 return 1;
748 }
749 reply->type = msg->type;
750 reply->win = msg->win;
751 reply->msg = msg->msg;
752 reply->wparam = msg->wparam;
753 reply->lparam = msg->lparam;
754 reply->time = msg->time;
755
756 if (flags & PM_REMOVE)
757 {
758 if (msg->data)
759 {
760 set_reply_data_ptr( msg->data, msg->data_size );
761 msg->data = NULL;
762 msg->data_size = 0;
763 }
764 remove_queue_message( queue, msg, POST_MESSAGE );
765 }
766 else if (msg->data) set_reply_data( msg->data, msg->data_size );
767
768 return 1;
769 }
770
771 static int get_quit_message( struct msg_queue *queue, unsigned int flags,
772 struct get_message_reply *reply )
773 {
774 if (queue->quit_message)
775 {
776 reply->total = 0;
777 reply->type = MSG_POSTED;
778 reply->win = 0;
779 reply->msg = WM_QUIT;
780 reply->wparam = queue->exit_code;
781 reply->lparam = 0;
782 reply->time = get_tick_count();
783
784 if (flags & PM_REMOVE)
785 {
786 queue->quit_message = 0;
787 if (list_empty( &queue->msg_list[POST_MESSAGE] ))
788 clear_queue_bits( queue, QS_POSTMESSAGE|QS_ALLPOSTMESSAGE );
789 }
790 return 1;
791 }
792 else
793 return 0;
794 }
795
796 /* empty a message list and free all the messages */
797 static void empty_msg_list( struct list *list )
798 {
799 struct list *ptr;
800
801 while ((ptr = list_head( list )) != NULL)
802 {
803 struct message *msg = LIST_ENTRY( ptr, struct message, entry );
804 list_remove( &msg->entry );
805 free_message( msg );
806 }
807 }
808
809 /* cleanup all pending results when deleting a queue */
810 static void cleanup_results( struct msg_queue *queue )
811 {
812 struct list *entry;
813
814 while ((entry = list_head( &queue->send_result )) != NULL)
815 {
816 remove_result_from_sender( LIST_ENTRY( entry, struct message_result, sender_entry ) );
817 }
818
819 while ((entry = list_head( &queue->callback_result )) != NULL)
820 {
821 remove_result_from_sender( LIST_ENTRY( entry, struct message_result, sender_entry ) );
822 }
823
824 while (queue->recv_result)
825 reply_message( queue, 0, STATUS_ACCESS_DENIED /*FIXME*/, 1, NULL, 0 );
826 }
827
828 /* check if the thread owning the queue is hung (not checking for messages) */
829 static int is_queue_hung( struct msg_queue *queue )
830 {
831 struct wait_queue_entry *entry;
832
833 if (current_time - queue->last_get_msg <= 5 * TICKS_PER_SEC)
834 return 0; /* less than 5 seconds since last get message -> not hung */
835
836 LIST_FOR_EACH_ENTRY( entry, &queue->obj.wait_queue, struct wait_queue_entry, entry )
837 {
838 if (entry->thread->queue == queue)
839 return 0; /* thread is waiting on queue -> not hung */
840 }
841 return 1;
842 }
843
844 static int msg_queue_add_queue( struct object *obj, struct wait_queue_entry *entry )
845 {
846 struct msg_queue *queue = (struct msg_queue *)obj;
847 struct process *process = entry->thread->process;
848
849 /* a thread can only wait on its own queue */
850 if (entry->thread->queue != queue)
851 {
852 set_error( STATUS_ACCESS_DENIED );
853 return 0;
854 }
855 if (process->idle_event && !(queue->wake_mask & QS_SMRESULT)) set_event( process->idle_event );
856
857 if (queue->fd && list_empty( &obj->wait_queue )) /* first on the queue */
858 set_fd_events( queue->fd, POLLIN );
859 add_queue( obj, entry );
860 return 1;
861 }
862
863 static void msg_queue_remove_queue(struct object *obj, struct wait_queue_entry *entry )
864 {
865 struct msg_queue *queue = (struct msg_queue *)obj;
866
867 remove_queue( obj, entry );
868 if (queue->fd && list_empty( &obj->wait_queue )) /* last on the queue is gone */
869 set_fd_events( queue->fd, 0 );
870 }
871
872 static void msg_queue_dump( struct object *obj, int verbose )
873 {
874 struct msg_queue *queue = (struct msg_queue *)obj;
875 fprintf( stderr, "Msg queue bits=%x mask=%x\n",
876 queue->wake_bits, queue->wake_mask );
877 }
878
879 static int msg_queue_signaled( struct object *obj, struct thread *thread )
880 {
881 struct msg_queue *queue = (struct msg_queue *)obj;
882 int ret = 0;
883
884 if (queue->fd)
885 {
886 if ((ret = check_fd_events( queue->fd, POLLIN )))
887 /* stop waiting on select() if we are signaled */
888 set_fd_events( queue->fd, 0 );
889 else if (!list_empty( &obj->wait_queue ))
890 /* restart waiting on poll() if we are no longer signaled */
891 set_fd_events( queue->fd, POLLIN );
892 }
893 return ret || is_signaled( queue );
894 }
895
896 static int msg_queue_satisfied( struct object *obj, struct thread *thread )
897 {
898 struct msg_queue *queue = (struct msg_queue *)obj;
899 queue->wake_mask = 0;
900 queue->changed_mask = 0;
901 return 0; /* Not abandoned */
902 }
903
904 static void msg_queue_destroy( struct object *obj )
905 {
906 struct msg_queue *queue = (struct msg_queue *)obj;
907 struct list *ptr;
908 int i;
909
910 cleanup_results( queue );
911 for (i = 0; i < NB_MSG_KINDS; i++) empty_msg_list( &queue->msg_list[i] );
912
913 while ((ptr = list_head( &queue->pending_timers )))
914 {
915 struct timer *timer = LIST_ENTRY( ptr, struct timer, entry );
916 list_remove( &timer->entry );
917 free( timer );
918 }
919 while ((ptr = list_head( &queue->expired_timers )))
920 {
921 struct timer *timer = LIST_ENTRY( ptr, struct timer, entry );
922 list_remove( &timer->entry );
923 free( timer );
924 }
925 if (queue->timeout) remove_timeout_user( queue->timeout );
926 if (queue->input)
927 {
928 queue->input->cursor_count -= queue->cursor_count;
929 release_object( queue->input );
930 }
931 if (queue->hooks) release_object( queue->hooks );
932 if (queue->fd) release_object( queue->fd );
933 }
934
935 static void msg_queue_poll_event( struct fd *fd, int event )
936 {
937 struct msg_queue *queue = get_fd_user( fd );
938 assert( queue->obj.ops == &msg_queue_ops );
939
940 if (event & (POLLERR | POLLHUP)) set_fd_events( fd, -1 );
941 else set_fd_events( queue->fd, 0 );
942 wake_up( &queue->obj, 0 );
943 }
944
945 static void thread_input_dump( struct object *obj, int verbose )
946 {
947 struct thread_input *input = (struct thread_input *)obj;
948 fprintf( stderr, "Thread input focus=%08x capture=%08x active=%08x\n",
949 input->focus, input->capture, input->active );
950 }
951
952 static void thread_input_destroy( struct object *obj )
953 {
954 struct thread_input *input = (struct thread_input *)obj;
955
956 empty_msg_list( &input->msg_list );
957 if (input->desktop)
958 {
959 if (input->desktop->foreground_input == input) set_foreground_input( input->desktop, NULL );
960 release_object( input->desktop );
961 }
962 }
963
964 /* fix the thread input data when a window is destroyed */
965 static inline void thread_input_cleanup_window( struct msg_queue *queue, user_handle_t window )
966 {
967 struct thread_input *input = queue->input;
968
969 if (window == input->focus) input->focus = 0;
970 if (window == input->capture) input->capture = 0;
971 if (window == input->active) input->active = 0;
972 if (window == input->menu_owner) input->menu_owner = 0;
973 if (window == input->move_size) input->move_size = 0;
974 if (window == input->caret) set_caret_window( input, 0 );
975 }
976
977 /* check if the specified window can be set in the input data of a given queue */
978 static int check_queue_input_window( struct msg_queue *queue, user_handle_t window )
979 {
980 struct thread *thread;
981 int ret = 0;
982
983 if (!window) return 1; /* we can always clear the data */
984
985 if ((thread = get_window_thread( window )))
986 {
987 ret = (queue->input == thread->queue->input);
988 if (!ret) set_error( STATUS_ACCESS_DENIED );
989 release_object( thread );
990 }
991 else set_error( STATUS_INVALID_HANDLE );
992
993 return ret;
994 }
995
996 /* make sure the specified thread has a queue */
997 int init_thread_queue( struct thread *thread )
998 {
999 if (thread->queue) return 1;
1000 return (create_msg_queue( thread, NULL ) != NULL);
1001 }
1002
1003 /* attach two thread input data structures */
1004 int attach_thread_input( struct thread *thread_from, struct thread *thread_to )
1005 {
1006 struct desktop *desktop;
1007 struct thread_input *input;
1008 int ret;
1009
1010 if (!thread_to->queue && !(thread_to->queue = create_msg_queue( thread_to, NULL ))) return 0;
1011 if (!(desktop = get_thread_desktop( thread_from, 0 ))) return 0;
1012 input = (struct thread_input *)grab_object( thread_to->queue->input );
1013 if (input->desktop != desktop)
1014 {
1015 set_error( STATUS_ACCESS_DENIED );
1016 release_object( input );
1017 release_object( desktop );
1018 return 0;
1019 }
1020 release_object( desktop );
1021
1022 ret = assign_thread_input( thread_from, input );
1023 if (ret) memset( input->keystate, 0, sizeof(input->keystate) );
1024 release_object( input );
1025 return ret;
1026 }
1027
1028 /* detach two thread input data structures */
1029 void detach_thread_input( struct thread *thread_from )
1030 {
1031 struct thread_input *input;
1032
1033 if ((input = create_thread_input( thread_from )))
1034 {
1035 assign_thread_input( thread_from, input );
1036 release_object( input );
1037 }
1038 }
1039
1040
1041 /* set the next timer to expire */
1042 static void set_next_timer( struct msg_queue *queue )
1043 {
1044 struct list *ptr;
1045
1046 if (queue->timeout)
1047 {
1048 remove_timeout_user( queue->timeout );
1049 queue->timeout = NULL;
1050 }
1051 if ((ptr = list_head( &queue->pending_timers )))
1052 {
1053 struct timer *timer = LIST_ENTRY( ptr, struct timer, entry );
1054 queue->timeout = add_timeout_user( timer->when, timer_callback, queue );
1055 }
1056 /* set/clear QS_TIMER bit */
1057 if (list_empty( &queue->expired_timers ))
1058 clear_queue_bits( queue, QS_TIMER );
1059 else
1060 set_queue_bits( queue, QS_TIMER );
1061 }
1062
1063 /* find a timer from its window and id */
1064 static struct timer *find_timer( struct msg_queue *queue, user_handle_t win,
1065 unsigned int msg, lparam_t id )
1066 {
1067 struct list *ptr;
1068
1069 /* we need to search both lists */
1070
1071 LIST_FOR_EACH( ptr, &queue->pending_timers )
1072 {
1073 struct timer *timer = LIST_ENTRY( ptr, struct timer, entry );
1074 if (timer->win == win && timer->msg == msg && timer->id == id) return timer;
1075 }
1076 LIST_FOR_EACH( ptr, &queue->expired_timers )
1077 {
1078 struct timer *timer = LIST_ENTRY( ptr, struct timer, entry );
1079 if (timer->win == win && timer->msg == msg && timer->id == id) return timer;
1080 }
1081 return NULL;
1082 }
1083
1084 /* callback for the next timer expiration */
1085 static void timer_callback( void *private )
1086 {
1087 struct msg_queue *queue = private;
1088 struct list *ptr;
1089
1090 queue->timeout = NULL;
1091 /* move on to the next timer */
1092 ptr = list_head( &queue->pending_timers );
1093 list_remove( ptr );
1094 list_add_tail( &queue->expired_timers, ptr );
1095 set_next_timer( queue );
1096 }
1097
1098 /* link a timer at its rightful place in the queue list */
1099 static void link_timer( struct msg_queue *queue, struct timer *timer )
1100 {
1101 struct list *ptr;
1102
1103 for (ptr = queue->pending_timers.next; ptr != &queue->pending_timers; ptr = ptr->next)
1104 {
1105 struct timer *t = LIST_ENTRY( ptr, struct timer, entry );
1106 if (t->when >= timer->when) break;
1107 }
1108 list_add_before( ptr, &timer->entry );
1109 }
1110
1111 /* remove a timer from the queue timer list and free it */
1112 static void free_timer( struct msg_queue *queue, struct timer *timer )
1113 {
1114 list_remove( &timer->entry );
1115 free( timer );
1116 set_next_timer( queue );
1117 }
1118
1119 /* restart an expired timer */
1120 static void restart_timer( struct msg_queue *queue, struct timer *timer )
1121 {
1122 list_remove( &timer->entry );
1123 while (timer->when <= current_time) timer->when += (timeout_t)timer->rate * 10000;
1124 link_timer( queue, timer );
1125 set_next_timer( queue );
1126 }
1127
1128 /* find an expired timer matching the filtering parameters */
1129 static struct timer *find_expired_timer( struct msg_queue *queue, user_handle_t win,
1130 unsigned int get_first, unsigned int get_last,
1131 int remove )
1132 {
1133 struct list *ptr;
1134
1135 LIST_FOR_EACH( ptr, &queue->expired_timers )
1136 {
1137 struct timer *timer = LIST_ENTRY( ptr, struct timer, entry );
1138 if (win && timer->win != win) continue;
1139 if (check_msg_filter( timer->msg, get_first, get_last ))
1140 {
1141 if (remove) restart_timer( queue, timer );
1142 return timer;
1143 }
1144 }
1145 return NULL;
1146 }
1147
1148 /* add a timer */
1149 static struct timer *set_timer( struct msg_queue *queue, unsigned int rate )
1150 {
1151 struct timer *timer = mem_alloc( sizeof(*timer) );
1152 if (timer)
1153 {
1154 timer->rate = max( rate, 1 );
1155 timer->when = current_time + (timeout_t)timer->rate * 10000;
1156 link_timer( queue, timer );
1157 /* check if we replaced the next timer */
1158 if (list_head( &queue->pending_timers ) == &timer->entry) set_next_timer( queue );
1159 }
1160 return timer;
1161 }
1162
1163 /* change the input key state for a given key */
1164 static void set_input_key_state( unsigned char *keystate, unsigned char key, int down )
1165 {
1166 if (down)
1167 {
1168 if (!(keystate[key] & 0x80)) keystate[key] ^= 0x01;
1169 keystate[key] |= down;
1170 }
1171 else keystate[key] &= ~0x80;
1172 }
1173
1174 /* update the input key state for a keyboard message */
1175 static void update_input_key_state( struct desktop *desktop, unsigned char *keystate,
1176 const struct message *msg )
1177 {
1178 unsigned char key;
1179 int down = 0;
1180
1181 switch (msg->msg)
1182 {
1183 case WM_LBUTTONDOWN:
1184 down = (keystate == desktop->keystate) ? 0xc0 : 0x80;
1185 /* fall through */
1186 case WM_LBUTTONUP:
1187 set_input_key_state( keystate, VK_LBUTTON, down );
1188 break;
1189 case WM_MBUTTONDOWN:
1190 down = (keystate == desktop->keystate) ? 0xc0 : 0x80;
1191 /* fall through */
1192 case WM_MBUTTONUP:
1193 set_input_key_state( keystate, VK_MBUTTON, down );
1194 break;
1195 case WM_RBUTTONDOWN:
1196 down = (keystate == desktop->keystate) ? 0xc0 : 0x80;
1197 /* fall through */
1198 case WM_RBUTTONUP:
1199 set_input_key_state( keystate, VK_RBUTTON, down );
1200 break;
1201 case WM_XBUTTONDOWN:
1202 down = (keystate == desktop->keystate) ? 0xc0 : 0x80;
1203 /* fall through */
1204 case WM_XBUTTONUP:
1205 if (msg->wparam >> 16 == XBUTTON1) set_input_key_state( keystate, VK_XBUTTON1, down );
1206 else if (msg->wparam >> 16 == XBUTTON2) set_input_key_state( keystate, VK_XBUTTON2, down );
1207 break;
1208 case WM_KEYDOWN:
1209 case WM_SYSKEYDOWN:
1210 down = (keystate == desktop->keystate) ? 0xc0 : 0x80;
1211 /* fall through */
1212 case WM_KEYUP:
1213 case WM_SYSKEYUP:
1214 key = (unsigned char)msg->wparam;
1215 set_input_key_state( keystate, key, down );
1216 switch(key)
1217 {
1218 case VK_LCONTROL:
1219 case VK_RCONTROL:
1220 down = (keystate[VK_LCONTROL] | keystate[VK_RCONTROL]) & 0x80;
1221 set_input_key_state( keystate, VK_CONTROL, down );
1222 break;
1223 case VK_LMENU:
1224 case VK_RMENU:
1225 down = (keystate[VK_LMENU] | keystate[VK_RMENU]) & 0x80;
1226 set_input_key_state( keystate, VK_MENU, down );
1227 break;
1228 case VK_LSHIFT:
1229 case VK_RSHIFT:
1230 down = (keystate[VK_LSHIFT] | keystate[VK_RSHIFT]) & 0x80;
1231 set_input_key_state( keystate, VK_SHIFT, down );
1232 break;
1233 }
1234 break;
1235 }
1236 }
1237
1238 /* release the hardware message currently being processed by the given thread */
1239 static void release_hardware_message( struct msg_queue *queue, unsigned int hw_id,
1240 int remove, user_handle_t new_win )
1241 {
1242 struct thread_input *input = queue->input;
1243 struct message *msg;
1244
1245 LIST_FOR_EACH_ENTRY( msg, &input->msg_list, struct message, entry )
1246 {
1247 if (msg->unique_id == hw_id) break;
1248 }
1249 if (&msg->entry == &input->msg_list) return; /* not found */
1250
1251 /* clear the queue bit for that message */
1252 if (remove || new_win)
1253 {
1254 struct message *other;
1255 int clr_bit;
1256
1257 clr_bit = get_hardware_msg_bit( msg );
1258 LIST_FOR_EACH_ENTRY( other, &input->msg_list, struct message, entry )
1259 {
1260 if (other != msg && get_hardware_msg_bit( other ) == clr_bit)
1261 {
1262 clr_bit = 0;
1263 break;
1264 }
1265 }
1266 if (clr_bit) clear_queue_bits( queue, clr_bit );
1267 }
1268
1269 if (new_win) /* set the new window */
1270 {
1271 struct thread *owner = get_window_thread( new_win );
1272 if (owner)
1273 {
1274 msg->win = new_win;
1275 if (owner->queue->input != input)
1276 {
1277 list_remove( &msg->entry );
1278 if (merge_message( owner->queue->input, msg ))
1279 {
1280 free_message( msg );
1281 release_object( owner );
1282 return;
1283 }
1284 list_add_tail( &owner->queue->input->msg_list, &msg->entry );
1285 }
1286 set_queue_bits( owner->queue, get_hardware_msg_bit( msg ));
1287 remove = 0;
1288 release_object( owner );
1289 }
1290 }
1291 if (remove)
1292 {
1293 update_input_key_state( input->desktop, input->keystate, msg );
1294 list_remove( &msg->entry );
1295 free_message( msg );
1296 }
1297 }
1298
1299 /* find the window that should receive a given hardware message */
1300 static user_handle_t find_hardware_message_window( struct desktop *desktop, struct thread_input *input,
1301 struct message *msg, unsigned int *msg_code )
1302 {
1303 struct hardware_msg_data *data = msg->data;
1304 user_handle_t win = 0;
1305
1306 *msg_code = msg->msg;
1307 if (is_keyboard_msg( msg ))
1308 {
1309 if (input && !(win = input->focus))
1310 {
1311 win = input->active;
1312 if (*msg_code < WM_SYSKEYDOWN) *msg_code += WM_SYSKEYDOWN - WM_KEYDOWN;
1313 }
1314 }
1315 else /* mouse message */
1316 {
1317 if (!input || !(win = input->capture))
1318 {
1319 if (!(win = msg->win) || !is_window_visible( win ) || is_window_transparent( win ))
1320 win = window_from_point( desktop, data->x, data->y );
1321 }
1322 }
1323 return win;
1324 }
1325
1326 /* queue a hardware message into a given thread input */
1327 static void queue_hardware_message( struct desktop *desktop, struct message *msg, int always_queue )
1328 {
1329 user_handle_t win;
1330 struct thread *thread;
1331 struct thread_input *input;
1332 unsigned int msg_code;
1333 struct hardware_msg_data *data = msg->data;
1334
1335 update_input_key_state( desktop, desktop->keystate, msg );
1336 last_input_time = get_tick_count();
1337 if (msg->msg != WM_MOUSEMOVE) always_queue = 1;
1338
1339 if (is_keyboard_msg( msg ))
1340 {
1341 if (desktop->keystate[VK_MENU] & 0x80) msg->lparam |= KF_ALTDOWN << 16;
1342 if (msg->wparam == VK_SHIFT || msg->wparam == VK_LSHIFT || msg->wparam == VK_RSHIFT)
1343 msg->lparam &= ~(KF_EXTENDED << 16);
1344 }
1345 else
1346 {
1347 if (msg->msg == WM_MOUSEMOVE)
1348 {
1349 int x = min( max( data->x, desktop->cursor.clip.left ), desktop->cursor.clip.right-1 );
1350 int y = min( max( data->y, desktop->cursor.clip.top ), desktop->cursor.clip.bottom-1 );
1351 if (desktop->cursor.x != x || desktop->cursor.y != y) always_queue = 1;
1352 desktop->cursor.x = x;
1353 desktop->cursor.y = y;
1354 desktop->cursor.last_change = get_tick_count();
1355 }
1356 if (desktop->keystate[VK_LBUTTON] & 0x80) msg->wparam |= MK_LBUTTON;
1357 if (desktop->keystate[VK_MBUTTON] & 0x80) msg->wparam |= MK_MBUTTON;
1358 if (desktop->keystate[VK_RBUTTON] & 0x80) msg->wparam |= MK_RBUTTON;
1359 if (desktop->keystate[VK_SHIFT] & 0x80) msg->wparam |= MK_SHIFT;
1360 if (desktop->keystate[VK_CONTROL] & 0x80) msg->wparam |= MK_CONTROL;
1361 if (desktop->keystate[VK_XBUTTON1] & 0x80) msg->wparam |= MK_XBUTTON1;
1362 if (desktop->keystate[VK_XBUTTON2] & 0x80) msg->wparam |= MK_XBUTTON2;
1363 }
1364 data->x = desktop->cursor.x;
1365 data->y = desktop->cursor.y;
1366
1367 if (msg->win && (thread = get_window_thread( msg->win )))
1368 {
1369 input = thread->queue->input;
1370 release_object( thread );
1371 }
1372 else input = desktop->foreground_input;
1373
1374 win = find_hardware_message_window( desktop, input, msg, &msg_code );
1375 if (!win || !(thread = get_window_thread(win)))
1376 {
1377 if (input) update_input_key_state( input->desktop, input->keystate, msg );
1378 free_message( msg );
1379 return;
1380 }
1381 input = thread->queue->input;
1382
1383 if (win != desktop->cursor.win) always_queue = 1;
1384 desktop->cursor.win = win;
1385
1386 if (!always_queue || merge_message( input, msg )) free_message( msg );
1387 else
1388 {
1389 msg->unique_id = 0; /* will be set once we return it to the app */
1390 list_add_tail( &input->msg_list, &msg->entry );
1391 set_queue_bits( thread->queue, get_hardware_msg_bit(msg) );
1392 }
1393 release_object( thread );
1394 }
1395
1396 /* send the low-level hook message for a given hardware message */
1397 static int send_hook_ll_message( struct desktop *desktop, struct message *hardware_msg,
1398 const hw_input_t *input, struct msg_queue *sender )
1399 {
1400 struct thread *hook_thread;
1401 struct msg_queue *queue;
1402 struct message *msg;
1403 timeout_t timeout = 2000 * -10000; /* FIXME: load from registry */
1404 int id = (input->type == INPUT_MOUSE) ? WH_MOUSE_LL : WH_KEYBOARD_LL;
1405
1406 if (!(hook_thread = get_first_global_hook( id ))) return 0;
1407 if (!(queue = hook_thread->queue)) return 0;
1408
1409 if (!(msg = mem_alloc( sizeof(*msg) ))) return 0;
1410
1411 msg->type = MSG_HOOK_LL;
1412 msg->win = 0;
1413 msg->msg = id;
1414 msg->wparam = hardware_msg->msg;
1415 msg->time = hardware_msg->time;
1416 msg->data_size = hardware_msg->data_size;
1417 msg->result = NULL;
1418
1419 if (input->type == INPUT_KEYBOARD)
1420 {
1421 unsigned short vkey = input->kbd.vkey;
1422 if (input->kbd.flags & KEYEVENTF_UNICODE) vkey = VK_PACKET;
1423 msg->lparam = (input->kbd.scan << 16) | vkey;
1424 }
1425 else msg->lparam = input->mouse.data << 16;
1426
1427 if (!(msg->data = memdup( hardware_msg->data, hardware_msg->data_size )) ||
1428 !(msg->result = alloc_message_result( sender, queue, msg, timeout )))
1429 {
1430 free_message( msg );
1431 return 0;
1432 }
1433 msg->result->hardware_msg = hardware_msg;
1434 msg->result->desktop = (struct desktop *)grab_object( desktop );
1435 list_add_tail( &queue->msg_list[SEND_MESSAGE], &msg->entry );
1436 set_queue_bits( queue, QS_SENDMESSAGE );
1437 return 1;
1438 }
1439
1440 /* queue a hardware message for a mouse event */
1441 static int queue_mouse_message( struct desktop *desktop, user_handle_t win, const hw_input_t *input,
1442 unsigned int hook_flags, struct msg_queue *sender )
1443 {
1444 struct hardware_msg_data *msg_data;
1445 struct message *msg;
1446 unsigned int i, time, flags;
1447 int wait = 0, x, y;
1448
1449 static const unsigned int messages[] =
1450 {
1451 WM_MOUSEMOVE, /* 0x0001 = MOUSEEVENTF_MOVE */
1452 WM_LBUTTONDOWN, /* 0x0002 = MOUSEEVENTF_LEFTDOWN */
1453 WM_LBUTTONUP, /* 0x0004 = MOUSEEVENTF_LEFTUP */
1454 WM_RBUTTONDOWN, /* 0x0008 = MOUSEEVENTF_RIGHTDOWN */
1455 WM_RBUTTONUP, /* 0x0010 = MOUSEEVENTF_RIGHTUP */
1456 WM_MBUTTONDOWN, /* 0x0020 = MOUSEEVENTF_MIDDLEDOWN */
1457 WM_MBUTTONUP, /* 0x0040 = MOUSEEVENTF_MIDDLEUP */
1458 WM_XBUTTONDOWN, /* 0x0080 = MOUSEEVENTF_XDOWN */
1459 WM_XBUTTONUP, /* 0x0100 = MOUSEEVENTF_XUP */
1460 0, /* 0x0200 = unused */
1461 0, /* 0x0400 = unused */
1462 WM_MOUSEWHEEL, /* 0x0800 = MOUSEEVENTF_WHEEL */
1463 WM_MOUSEHWHEEL /* 0x1000 = MOUSEEVENTF_HWHEEL */
1464 };
1465
1466 desktop->cursor.last_change = get_tick_count();
1467 flags = input->mouse.flags;
1468 time = input->mouse.time;
1469 if (!time) time = desktop->cursor.last_change;
1470
1471 if (flags & MOUSEEVENTF_MOVE)
1472 {
1473 if (flags & MOUSEEVENTF_ABSOLUTE)
1474 {
1475 x = input->mouse.x;
1476 y = input->mouse.y;
1477 if (flags & ~(MOUSEEVENTF_MOVE | MOUSEEVENTF_ABSOLUTE) &&
1478 x == desktop->cursor.x && y == desktop->cursor.y)
1479 flags &= ~MOUSEEVENTF_MOVE;
1480 }
1481 else
1482 {
1483 x = desktop->cursor.x + input->mouse.x;
1484 y = desktop->cursor.y + input->mouse.y;
1485 }
1486 }
1487 else
1488 {
1489 x = desktop->cursor.x;
1490 y = desktop->cursor.y;
1491 }
1492
1493 for (i = 0; i < sizeof(messages)/sizeof(messages[0]); i++)
1494 {
1495 if (!messages[i]) continue;
1496 if (!(flags & (1 << i))) continue;
1497 flags &= ~(1 << i);
1498
1499 if (!(msg = mem_alloc( sizeof(*msg) ))) return 0;
1500 if (!(msg_data = mem_alloc( sizeof(*msg_data) )))
1501 {
1502 free( msg );
1503 return 0;
1504 }
1505 memset( msg_data, 0, sizeof(*msg_data) );
1506
1507 msg->type = MSG_HARDWARE;
1508 msg->win = get_user_full_handle( win );
1509 msg->msg = messages[i];
1510 msg->wparam = input->mouse.data << 16;
1511 msg->lparam = 0;
1512 msg->time = time;
1513 msg->result = NULL;
1514 msg->data = msg_data;
1515 msg->data_size = sizeof(*msg_data);
1516 msg_data->x = x;
1517 msg_data->y = y;
1518 msg_data->info = input->mouse.info;
1519 if (hook_flags & SEND_HWMSG_INJECTED) msg_data->flags = LLMHF_INJECTED;
1520
1521 /* specify a sender only when sending the last message */
1522 if (!(flags & ((1 << sizeof(messages)/sizeof(messages[0])) - 1)))
1523 {
1524 if (!(wait = send_hook_ll_message( desktop, msg, input, sender )))
1525 queue_hardware_message( desktop, msg, 0 );
1526 }
1527 else if (!send_hook_ll_message( desktop, msg, input, NULL ))
1528 queue_hardware_message( desktop, msg, 0 );
1529 }
1530 return wait;
1531 }
1532
1533 /* queue a hardware message for a keyboard event */
1534 static int queue_keyboard_message( struct desktop *desktop, user_handle_t win, const hw_input_t *input,
1535 unsigned int hook_flags, struct msg_queue *sender )
1536 {
1537 struct hardware_msg_data *msg_data;
1538 struct message *msg;
1539 unsigned char vkey = input->kbd.vkey;
1540 int wait;
1541
1542 if (!(msg = mem_alloc( sizeof(*msg) ))) return 0;
1543 if (!(msg_data = mem_alloc( sizeof(*msg_data) )))
1544 {
1545 free( msg );
1546 return 0;
1547 }
1548 memset( msg_data, 0, sizeof(*msg_data) );
1549
1550 msg->type = MSG_HARDWARE;
1551 msg->win = get_user_full_handle( win );
1552 msg->lparam = (input->kbd.scan << 16) | 1; /* repeat count */
1553 msg->time = input->kbd.time;
1554 msg->result = NULL;
1555 msg->data = msg_data;
1556 msg->data_size = sizeof(*msg_data);
1557 msg_data->info = input->kbd.info;
1558 if (!msg->time) msg->time = get_tick_count();
1559 if (hook_flags & SEND_HWMSG_INJECTED) msg_data->flags = LLKHF_INJECTED;
1560
1561 if (input->kbd.flags & KEYEVENTF_UNICODE)
1562 {
1563 msg->wparam = VK_PACKET;
1564 }
1565 else
1566 {
1567 unsigned int flags = 0;
1568 switch (vkey)
1569 {
1570 case VK_MENU:
1571 case VK_LMENU:
1572 case VK_RMENU:
1573 vkey = (input->kbd.flags & KEYEVENTF_EXTENDEDKEY) ? VK_RMENU : VK_LMENU;
1574 break;
1575 case VK_CONTROL:
1576 case VK_LCONTROL:
1577 case VK_RCONTROL:
1578 vkey = (input->kbd.flags & KEYEVENTF_EXTENDEDKEY) ? VK_RCONTROL : VK_LCONTROL;
1579 break;
1580 case VK_SHIFT:
1581 case VK_LSHIFT:
1582 case VK_RSHIFT:
1583 vkey = (input->kbd.flags & KEYEVENTF_EXTENDEDKEY) ? VK_RSHIFT : VK_LSHIFT;
1584 break;
1585 }
1586 if (input->kbd.flags & KEYEVENTF_EXTENDEDKEY) flags |= KF_EXTENDED;
1587 /* FIXME: set KF_DLGMODE and KF_MENUMODE when needed */
1588 if (input->kbd.flags & KEYEVENTF_KEYUP) flags |= KF_REPEAT | KF_UP;
1589 else if (desktop->keystate[vkey] & 0x80) flags |= KF_REPEAT;
1590
1591 msg->wparam = vkey;
1592 msg->lparam |= flags << 16;
1593 msg_data->flags |= (flags & (KF_EXTENDED | KF_ALTDOWN | KF_UP)) >> 8;
1594 }
1595
1596 msg->msg = (input->kbd.flags & KEYEVENTF_KEYUP) ? WM_KEYUP : WM_KEYDOWN;
1597
1598 switch (vkey)
1599 {
1600 case VK_LMENU:
1601 case VK_RMENU:
1602 if (input->kbd.flags & KEYEVENTF_KEYUP)
1603 {
1604 /* send WM_SYSKEYUP if Alt still pressed and no other key in between */
1605 /* we use 0x02 as a flag to track if some other SYSKEYUP was sent already */
1606 if ((desktop->keystate[VK_MENU] & 0x82) != 0x82) break;
1607 msg->msg = WM_SYSKEYUP;
1608 desktop->keystate[VK_MENU] &= ~0x02;
1609 }
1610 else
1611 {
1612 /* send WM_SYSKEYDOWN for Alt except with Ctrl */
1613 if (desktop->keystate[VK_CONTROL] & 0x80) break;
1614 msg->msg = WM_SYSKEYDOWN;
1615 desktop->keystate[VK_MENU] |= 0x02;
1616 }
1617 break;
1618
1619 case VK_LCONTROL:
1620 case VK_RCONTROL:
1621 /* send WM_SYSKEYUP on release if Alt still pressed */
1622 if (!(input->kbd.flags & KEYEVENTF_KEYUP)) break;
1623 if (!(desktop->keystate[VK_MENU] & 0x80)) break;
1624 msg->msg = WM_SYSKEYUP;
1625 desktop->keystate[VK_MENU] &= ~0x02;
1626 break;
1627
1628 default:
1629 /* send WM_SYSKEY for Alt-anykey and for F10 */
1630 if (desktop->keystate[VK_CONTROL] & 0x80) break;
1631 if (!(desktop->keystate[VK_MENU] & 0x80)) break;
1632 /* fall through */
1633 case VK_F10:
1634 msg->msg = (input->kbd.flags & KEYEVENTF_KEYUP) ? WM_SYSKEYUP : WM_SYSKEYDOWN;
1635 desktop->keystate[VK_MENU] &= ~0x02;
1636 break;
1637 }
1638 if (!(wait = send_hook_ll_message( desktop, msg, input, sender )))
1639 queue_hardware_message( desktop, msg, 1 );
1640
1641 return wait;
1642 }
1643
1644 /* queue a hardware message for a custom type of event */
1645 static void queue_custom_hardware_message( struct desktop *desktop, user_handle_t win,
1646 const hw_input_t *input )
1647 {
1648 struct hardware_msg_data *msg_data;
1649 struct message *msg;
1650
1651 if (!(msg = mem_alloc( sizeof(*msg) ))) return;
1652 if (!(msg_data = mem_alloc( sizeof(*msg_data) )))
1653 {
1654 free( msg );
1655 return;
1656 }
1657 memset( msg_data, 0, sizeof(*msg_data) );
1658
1659 msg->type = MSG_HARDWARE;
1660 msg->win = get_user_full_handle( win );
1661 msg->msg = input->hw.msg;
1662 msg->wparam = 0;
1663 msg->lparam = input->hw.lparam;
1664 msg->time = get_tick_count();
1665 msg->result = NULL;
1666 msg->data = msg_data;
1667 msg->data_size = sizeof(*msg_data);
1668
1669 queue_hardware_message( desktop, msg, 1 );
1670 }
1671
1672 /* check message filter for a hardware message */
1673 static int check_hw_message_filter( user_handle_t win, unsigned int msg_code,
1674 user_handle_t filter_win, unsigned int first, unsigned int last )
1675 {
1676 if (msg_code >= WM_KEYFIRST && msg_code <= WM_KEYLAST)
1677 {
1678 /* we can only test the window for a keyboard message since the
1679 * dest window for a mouse message depends on hittest */
1680 if (filter_win && win != filter_win && !is_child_window( filter_win, win ))
1681 return 0;
1682 /* the message code is final for a keyboard message, we can simply check it */
1683 return check_msg_filter( msg_code, first, last );
1684 }
1685 else /* mouse message */
1686 {
1687 /* we need to check all possible values that the message can have in the end */
1688
1689 if (check_msg_filter( msg_code, first, last )) return 1;
1690 if (msg_code == WM_MOUSEWHEEL) return 0; /* no other possible value for this one */
1691
1692 /* all other messages can become non-client messages */
1693 if (check_msg_filter( msg_code + (WM_NCMOUSEFIRST - WM_MOUSEFIRST), first, last )) return 1;
1694
1695 /* clicks can become double-clicks or non-client double-clicks */
1696 if (msg_code == WM_LBUTTONDOWN || msg_code == WM_MBUTTONDOWN ||
1697 msg_code == WM_RBUTTONDOWN || msg_code == WM_XBUTTONDOWN)
1698 {
1699 if (check_msg_filter( msg_code + (WM_LBUTTONDBLCLK - WM_LBUTTONDOWN), first, last )) return 1;
1700 if (check_msg_filter( msg_code + (WM_NCLBUTTONDBLCLK - WM_LBUTTONDOWN), first, last )) return 1;
1701 }
1702 return 0;
1703 }
1704 }
1705
1706
1707 /* find a hardware message for the given queue */
1708 static int get_hardware_message( struct thread *thread, unsigned int hw_id, user_handle_t filter_win,
1709 unsigned int first, unsigned int last, struct get_message_reply *reply )
1710 {
1711 struct thread_input *input = thread->queue->input;
1712 struct thread *win_thread;
1713 struct list *ptr;
1714 user_handle_t win;
1715 int clear_bits, got_one = 0;
1716 unsigned int msg_code;
1717
1718 ptr = list_head( &input->msg_list );
1719 if (hw_id)
1720 {
1721 while (ptr)
1722 {
1723 struct message *msg = LIST_ENTRY( ptr, struct message, entry );
1724 if (msg->unique_id == hw_id) break;
1725 ptr = list_next( &input->msg_list, ptr );
1726 }
1727 if (!ptr) ptr = list_head( &input->msg_list );
1728 else ptr = list_next( &input->msg_list, ptr ); /* start from the next one */
1729 }
1730
1731 if (ptr == list_head( &input->msg_list ))
1732 clear_bits = QS_KEY | QS_MOUSEMOVE | QS_MOUSEBUTTON;
1733 else
1734 clear_bits = 0; /* don't clear bits if we don't go through the whole list */
1735
1736 while (ptr)
1737 {
1738 struct message *msg = LIST_ENTRY( ptr, struct message, entry );
1739 struct hardware_msg_data *data = msg->data;
1740
1741 ptr = list_next( &input->msg_list, ptr );
1742 win = find_hardware_message_window( input->desktop, input, msg, &msg_code );
1743 if (!win || !(win_thread = get_window_thread( win )))
1744 {
1745 /* no window at all, remove it */
1746 update_input_key_state( input->desktop, input->keystate, msg );
1747 list_remove( &msg->entry );
1748 free_message( msg );
1749 continue;
1750 }
1751 if (win_thread != thread)
1752 {
1753 if (win_thread->queue->input == input)
1754 {
1755 /* wake the other thread */
1756 set_queue_bits( win_thread->queue, get_hardware_msg_bit(msg) );
1757 got_one = 1;
1758 }
1759 else
1760 {
1761 /* for another thread input, drop it */
1762 update_input_key_state( input->desktop, input->keystate, msg );
1763 list_remove( &msg->entry );
1764 free_message( msg );
1765 }
1766 release_object( win_thread );
1767 continue;
1768 }
1769 release_object( win_thread );
1770
1771 /* if we already got a message for another thread, or if it doesn't
1772 * match the filter we skip it */
1773 if (got_one || !check_hw_message_filter( win, msg_code, filter_win, first, last ))
1774 {
1775 clear_bits &= ~get_hardware_msg_bit( msg );
1776 continue;
1777 }
1778 /* now we can return it */
1779 if (!msg->unique_id) msg->unique_id = get_unique_id();
1780 reply->type = MSG_HARDWARE;
1781 reply->win = win;
1782 reply->msg = msg_code;
1783 reply->wparam = msg->wparam;
1784 reply->lparam = msg->lparam;
1785 reply->time = msg->time;
1786
1787 data->hw_id = msg->unique_id;
1788 set_reply_data( msg->data, msg->data_size );
1789 return 1;
1790 }
1791 /* nothing found, clear the hardware queue bits */
1792 clear_queue_bits( thread->queue, clear_bits );
1793 return 0;
1794 }
1795
1796 /* increment (or decrement if 'incr' is negative) the queue paint count */
1797 void inc_queue_paint_count( struct thread *thread, int incr )
1798 {
1799 struct msg_queue *queue = thread->queue;
1800
1801 assert( queue );
1802
1803 if ((queue->paint_count += incr) < 0) queue->paint_count = 0;
1804
1805 if (queue->paint_count)
1806 set_queue_bits( queue, QS_PAINT );
1807 else
1808 clear_queue_bits( queue, QS_PAINT );
1809 }
1810
1811
1812 /* remove all messages and timers belonging to a certain window */
1813 void queue_cleanup_window( struct thread *thread, user_handle_t win )
1814 {
1815 struct msg_queue *queue = thread->queue;
1816 struct list *ptr;
1817 int i;
1818
1819 if (!queue) return;
1820
1821 /* remove timers */
1822
1823 ptr = list_head( &queue->pending_timers );
1824 while (ptr)
1825 {
1826 struct list *next = list_next( &queue->pending_timers, ptr );
1827 struct timer *timer = LIST_ENTRY( ptr, struct timer, entry );
1828 if (timer->win == win) free_timer( queue, timer );
1829 ptr = next;
1830 }
1831 ptr = list_head( &queue->expired_timers );
1832 while (ptr)
1833 {
1834 struct list *next = list_next( &queue->expired_timers, ptr );
1835 struct timer *timer = LIST_ENTRY( ptr, struct timer, entry );
1836 if (timer->win == win) free_timer( queue, timer );
1837 ptr = next;
1838 }
1839
1840 /* remove messages */
1841 for (i = 0; i < NB_MSG_KINDS; i++)
1842 {
1843 struct list *ptr, *next;
1844
1845 LIST_FOR_EACH_SAFE( ptr, next, &queue->msg_list[i] )
1846 {
1847 struct message *msg = LIST_ENTRY( ptr, struct message, entry );
1848 if (msg->win == win) remove_queue_message( queue, msg, i );
1849 }
1850 }
1851
1852 thread_input_cleanup_window( queue, win );
1853 }
1854
1855 /* post a message to a window; used by socket handling */
1856 void post_message( user_handle_t win, unsigned int message, lparam_t wparam, lparam_t lparam )
1857 {
1858 struct message *msg;
1859 struct thread *thread = get_window_thread( win );
1860
1861 if (!thread) return;
1862
1863 if (thread->queue && (msg = mem_alloc( sizeof(*msg) )))
1864 {
1865 msg->type = MSG_POSTED;
1866 msg->win = get_user_full_handle( win );
1867 msg->msg = message;
1868 msg->wparam = wparam;
1869 msg->lparam = lparam;
1870 msg->time = get_tick_count();
1871 msg->result = NULL;
1872 msg->data = NULL;
1873 msg->data_size = 0;
1874
1875 list_add_tail( &thread->queue->msg_list[POST_MESSAGE], &msg->entry );
1876 set_queue_bits( thread->queue, QS_POSTMESSAGE|QS_ALLPOSTMESSAGE );
1877 }
1878 release_object( thread );
1879 }
1880
1881 /* post a win event */
1882 void post_win_event( struct thread *thread, unsigned int event,
1883 user_handle_t win, unsigned int object_id,
1884 unsigned int child_id, client_ptr_t hook_proc,
1885 const WCHAR *module, data_size_t module_size,
1886 user_handle_t hook)
1887 {
1888 struct message *msg;
1889
1890 if (thread->queue && (msg = mem_alloc( sizeof(*msg) )))
1891 {
1892 struct winevent_msg_data *data;
1893
1894 msg->type = MSG_WINEVENT;
1895 msg->win = get_user_full_handle( win );
1896 msg->msg = event;
1897 msg->wparam = object_id;
1898 msg->lparam = child_id;
1899 msg->time = get_tick_count();
1900 msg->result = NULL;
1901
1902 if ((data = malloc( sizeof(*data) + module_size )))
1903 {
1904 data->hook = hook;
1905 data->tid = get_thread_id( current );
1906 data->hook_proc = hook_proc;
1907 memcpy( data + 1, module, module_size );
1908
1909 msg->data = data;
1910 msg->data_size = sizeof(*data) + module_size;
1911
1912 if (debug_level > 1)
1913 fprintf( stderr, "post_win_event: tid %04x event %04x win %08x object_id %d child_id %d\n",
1914 get_thread_id(thread), event, win, object_id, child_id );
1915 list_add_tail( &thread->queue->msg_list[SEND_MESSAGE], &msg->entry );
1916 set_queue_bits( thread->queue, QS_SENDMESSAGE );
1917 }
1918 else
1919 free( msg );
1920 }
1921 }
1922
1923
1924 /* check if the thread owning the window is hung */
1925 DECL_HANDLER(is_window_hung)
1926 {
1927 struct thread *thread;
1928
1929 thread = get_window_thread( req->win );
1930 if (thread)
1931 {
1932 reply->is_hung = is_queue_hung( thread->queue );
1933 release_object( thread );
1934 }
1935 else reply->is_hung = 0;
1936 }
1937
1938
1939 /* get the message queue of the current thread */
1940 DECL_HANDLER(get_msg_queue)
1941 {
1942 struct msg_queue *queue = get_current_queue();
1943
1944 reply->handle = 0;
1945 if (queue) reply->handle = alloc_handle( current->process, queue, SYNCHRONIZE, 0 );
1946 }
1947
1948
1949 /* set the file descriptor associated to the current thread queue */
1950 DECL_HANDLER(set_queue_fd)
1951 {
1952 struct msg_queue *queue = get_current_queue();
1953 struct file *file;
1954 int unix_fd;
1955
1956 if (queue->fd) /* fd can only be set once */
1957 {
1958 set_error( STATUS_ACCESS_DENIED );
1959 return;
1960 }
1961 if (!(file = get_file_obj( current->process, req->handle, SYNCHRONIZE ))) return;
1962
1963 if ((unix_fd = get_file_unix_fd( file )) != -1)
1964 {
1965 if ((unix_fd = dup( unix_fd )) != -1)
1966 queue->fd = create_anonymous_fd( &msg_queue_fd_ops, unix_fd, &queue->obj, 0 );
1967 else
1968 file_set_error();
1969 }
1970 release_object( file );
1971 }
1972
1973
1974 /* set the current message queue wakeup mask */
1975 DECL_HANDLER(set_queue_mask)
1976 {
1977 struct msg_queue *queue = get_current_queue();
1978
1979 if (queue)
1980 {
1981 queue->wake_mask = req->wake_mask;
1982 queue->changed_mask = req->changed_mask;
1983 reply->wake_bits = queue->wake_bits;
1984 reply->changed_bits = queue->changed_bits;
1985 if (is_signaled( queue ))
1986 {
1987 /* if skip wait is set, do what would have been done in the subsequent wait */
1988 if (req->skip_wait) msg_queue_satisfied( &queue->obj, current );
1989 else wake_up( &queue->obj, 0 );
1990 }
1991 }
1992 }
1993
1994
1995 /* get the current message queue status */
1996 DECL_HANDLER(get_queue_status)
1997 {
1998 struct msg_queue *queue = current->queue;
1999 if (queue)
2000 {
2001 reply->wake_bits = queue->wake_bits;
2002 reply->changed_bits = queue->changed_bits;
2003 if (req->clear) queue->changed_bits = 0;
2004 }
2005 else reply->wake_bits = reply->changed_bits = 0;
2006 }
2007
2008
2009 /* send a message to a thread queue */
2010 DECL_HANDLER(send_message)
2011 {
2012 struct message *msg;
2013 struct msg_queue *send_queue = get_current_queue();
2014 struct msg_queue *recv_queue = NULL;
2015 struct thread *thread = NULL;
2016
2017 if (!(thread = get_thread_from_id( req->id ))) return;
2018
2019 if (!(recv_queue = thread->queue))
2020 {
2021 set_error( STATUS_INVALID_PARAMETER );
2022 release_object( thread );
2023 return;
2024 }
2025 if ((req->flags & SEND_MSG_ABORT_IF_HUNG) && is_queue_hung(recv_queue))
2026 {
2027 set_error( STATUS_TIMEOUT );
2028 release_object( thread );
2029 return;
2030 }
2031
2032 if ((msg = mem_alloc( sizeof(*msg) )))
2033 {
2034 msg->type = req->type;
2035 msg->win = get_user_full_handle( req->win );
2036 msg->msg = req->msg;
2037 msg->wparam = req->wparam;
2038 msg->lparam = req->lparam;
2039 msg->time = get_tick_count();
2040 msg->result = NULL;
2041 msg->data = NULL;
2042 msg->data_size = get_req_data_size();
2043
2044 if (msg->data_size && !(msg->data = memdup( get_req_data(), msg->data_size )))
2045 {
2046 free( msg );
2047 release_object( thread );
2048 return;
2049 }
2050
2051 switch(msg->type)
2052 {
2053 case MSG_OTHER_PROCESS:
2054 case MSG_ASCII:
2055 case MSG_UNICODE:
2056 case MSG_CALLBACK:
2057 if (!(msg->result = alloc_message_result( send_queue, recv_queue, msg, req->timeout )))
2058 {
2059 free_message( msg );
2060 break;
2061 }
2062 /* fall through */
2063 case MSG_NOTIFY:
2064 list_add_tail( &recv_queue->msg_list[SEND_MESSAGE], &msg->entry );
2065 set_queue_bits( recv_queue, QS_SENDMESSAGE );
2066 break;
2067 case MSG_POSTED:
2068 list_add_tail( &recv_queue->msg_list[POST_MESSAGE], &msg->entry );
2069 set_queue_bits( recv_queue, QS_POSTMESSAGE|QS_ALLPOSTMESSAGE );
2070 break;
2071 case MSG_HARDWARE: /* should use send_hardware_message instead */
2072 case MSG_CALLBACK_RESULT: /* cannot send this one */
2073 case MSG_HOOK_LL: /* generated internally */
2074 default:
2075 set_error( STATUS_INVALID_PARAMETER );
2076 free( msg );
2077 break;
2078 }
2079 }
2080 release_object( thread );
2081 }
2082
2083 /* send a hardware message to a thread queue */
2084 DECL_HANDLER(send_hardware_message)
2085 {
2086 struct thread *thread = NULL;
2087 struct desktop *desktop;
2088 struct msg_queue *sender = get_current_queue();
2089
2090 if (req->win)
2091 {
2092 if (!(thread = get_window_thread( req->win ))) return;
2093 desktop = (struct desktop *)grab_object( thread->queue->input->desktop );
2094 }
2095 else if (!(desktop = get_thread_desktop( current, 0 ))) return;
2096
2097 switch (req->input.type)
2098 {
2099 case INPUT_MOUSE:
2100 reply->wait = queue_mouse_message( desktop, req->win, &req->input, req->flags, sender );
2101 break;
2102 case INPUT_KEYBOARD:
2103 reply->wait = queue_keyboard_message( desktop, req->win, &req->input, req->flags, sender );
2104 break;
2105 case INPUT_HARDWARE:
2106 queue_custom_hardware_message( desktop, req->win, &req->input );
2107 break;
2108 default:
2109 set_error( STATUS_INVALID_PARAMETER );
2110 }
2111 if (thread) release_object( thread );
2112 release_object( desktop );
2113 }
2114
2115 /* post a quit message to the current queue */
2116 DECL_HANDLER(post_quit_message)
2117 {
2118 struct msg_queue *queue = get_current_queue();
2119
2120 if (!queue)
2121 return;
2122
2123 queue->quit_message = 1;
2124 queue->exit_code = req->exit_code;
2125 set_queue_bits( queue, QS_POSTMESSAGE|QS_ALLPOSTMESSAGE );
2126 }
2127
2128 /* get a message from the current queue */
2129 DECL_HANDLER(get_message)
2130 {
2131 struct timer *timer;
2132 struct list *ptr;
2133 struct msg_queue *queue = get_current_queue();
2134 user_handle_t get_win = get_user_full_handle( req->get_win );
2135 unsigned int filter = req->flags >> 16;
2136
2137 reply->active_hooks = get_active_hooks();
2138
2139 if (!queue) return;
2140 queue->last_get_msg = current_time;
2141 if (!filter) filter = QS_ALLINPUT;
2142
2143 /* first check for sent messages */
2144 if ((ptr = list_head( &queue->msg_list[SEND_MESSAGE] )))
2145 {
2146 struct message *msg = LIST_ENTRY( ptr, struct message, entry );
2147 receive_message( queue, msg, reply );
2148 return;
2149 }
2150
2151 /* clear changed bits so we can wait on them if we don't find a message */
2152 if (filter & QS_POSTMESSAGE)
2153 {
2154 queue->changed_bits &= ~(QS_POSTMESSAGE | QS_HOTKEY | QS_TIMER);
2155 if (req->get_first == 0 && req->get_last == ~0U) queue->changed_bits &= ~QS_ALLPOSTMESSAGE;
2156 }
2157 if (filter & QS_INPUT) queue->changed_bits &= ~QS_INPUT;
2158 if (filter & QS_PAINT) queue->changed_bits &= ~QS_PAINT;
2159
2160 /* then check for posted messages */
2161 if ((filter & QS_POSTMESSAGE) &&
2162 get_posted_message( queue, get_win, req->get_first, req->get_last, req->flags, reply ))
2163 return;
2164
2165 /* only check for quit messages if not posted messages pending.
2166 * note: the quit message isn't filtered */
2167 if (get_quit_message( queue, req->flags, reply ))
2168 return;
2169
2170 /* then check for any raw hardware message */
2171 if ((filter & QS_INPUT) &&
2172 filter_contains_hw_range( req->get_first, req->get_last ) &&
2173 get_hardware_message( current, req->hw_id, get_win, req->get_first, req->get_last, reply ))
2174 return;
2175
2176 /* now check for WM_PAINT */
2177 if ((filter & QS_PAINT) &&
2178 queue->paint_count &&
2179 check_msg_filter( WM_PAINT, req->get_first, req->get_last ) &&
2180 (reply->win = find_window_to_repaint( get_win, current )))
2181 {
2182 reply->type = MSG_POSTED;
2183 reply->msg = WM_PAINT;
2184 reply->wparam = 0;
2185 reply->lparam = 0;
2186 reply->time = get_tick_count();
2187 return;
2188 }
2189
2190 /* now check for timer */
2191 if ((filter & QS_TIMER) &&
2192 (timer = find_expired_timer( queue, get_win, req->get_first,
2193 req->get_last, (req->flags & PM_REMOVE) )))
2194 {
2195 reply->type = MSG_POSTED;
2196 reply->win = timer->win;
2197 reply->msg = timer->msg;
2198 reply->wparam = timer->id;
2199 reply->lparam = timer->lparam;
2200 reply->time = get_tick_count();
2201 if (!(req->flags & PM_NOYIELD) && current->process->idle_event)
2202 set_event( current->process->idle_event );
2203 return;
2204 }
2205
2206 if (get_win == -1 && current->process->idle_event) set_event( current->process->idle_event );
2207 queue->wake_mask = req->wake_mask;
2208 queue->changed_mask = req->changed_mask;
2209 set_error( STATUS_PENDING ); /* FIXME */
2210 }
2211
2212
2213 /* reply to a sent message */
2214 DECL_HANDLER(reply_message)
2215 {
2216 if (!current->queue) set_error( STATUS_ACCESS_DENIED );
2217 else if (current->queue->recv_result)
2218 reply_message( current->queue, req->result, 0, req->remove,
2219 get_req_data(), get_req_data_size() );
2220 }
2221
2222
2223 /* accept the current hardware message */
2224 DECL_HANDLER(accept_hardware_message)
2225 {
2226 if (current->queue)
2227 release_hardware_message( current->queue, req->hw_id, req->remove, req->new_win );
2228 else
2229 set_error( STATUS_ACCESS_DENIED );
2230 }
2231
2232
2233 /* retrieve the reply for the last message sent */
2234 DECL_HANDLER(get_message_reply)
2235 {
2236 struct message_result *result;
2237 struct list *entry;
2238 struct msg_queue *queue = current->queue;
2239
2240 if (queue)
2241 {
2242 set_error( STATUS_PENDING );
2243 reply->result = 0;
2244
2245 if (!(entry = list_head( &queue->send_result ))) return; /* no reply ready */
2246
2247 result = LIST_ENTRY( entry, struct message_result, sender_entry );
2248 if (result->replied || req->cancel)
2249 {
2250 if (result->replied)
2251 {
2252 reply->result = result->result;
2253 set_error( result->error );
2254 if (result->data)
2255 {
2256 data_size_t data_len = min( result->data_size, get_reply_max_size() );
2257 set_reply_data_ptr( result->data, data_len );
2258 result->data = NULL;
2259 result->data_size = 0;
2260 }
2261 }
2262 remove_result_from_sender( result );
2263
2264 entry = list_head( &queue->send_result );
2265 if (!entry) clear_queue_bits( queue, QS_SMRESULT );
2266 else
2267 {
2268 result = LIST_ENTRY( entry, struct message_result, sender_entry );
2269 if (!result->replied) clear_queue_bits( queue, QS_SMRESULT );
2270 }
2271 }
2272 }
2273 else set_error( STATUS_ACCESS_DENIED );
2274 }
2275
2276
2277 /* set a window timer */
2278 DECL_HANDLER(set_win_timer)
2279 {
2280 struct timer *timer;
2281 struct msg_queue *queue;
2282 struct thread *thread = NULL;
2283 user_handle_t win = 0;
2284 lparam_t id = req->id;
2285
2286 if (req->win)
2287 {
2288 if (!(win = get_user_full_handle( req->win )) || !(thread = get_window_thread( win )))
2289 {
2290 set_error( STATUS_INVALID_HANDLE );
2291 return;
2292 }
2293 if (thread->process != current->process)
2294 {
2295 release_object( thread );
2296 set_error( STATUS_ACCESS_DENIED );
2297 return;
2298 }
2299 queue = thread->queue;
2300 /* remove it if it existed already */
2301 if ((timer = find_timer( queue, win, req->msg, id ))) free_timer( queue, timer );
2302 }
2303 else
2304 {
2305 queue = get_current_queue();
2306 /* look for a timer with this id */
2307 if (id && (timer = find_timer( queue, 0, req->msg, id )))
2308 {
2309 /* free and reuse id */
2310 free_timer( queue, timer );
2311 }
2312 else
2313 {
2314 /* find a free id for it */
2315 do
2316 {
2317 id = queue->next_timer_id;
2318 if (--queue->next_timer_id <= 0x100) queue->next_timer_id = 0x7fff;
2319 }
2320 while (find_timer( queue, 0, req->msg, id ));
2321 }
2322 }
2323
2324 if ((timer = set_timer( queue, req->rate )))
2325 {
2326 timer->win = win;
2327 timer->msg = req->msg;
2328 timer->id = id;
2329 timer->lparam = req->lparam;
2330 reply->id = id;
2331 }
2332 if (thread) release_object( thread );
2333 }
2334
2335 /* kill a window timer */
2336 DECL_HANDLER(kill_win_timer)
2337 {
2338 struct timer *timer;
2339 struct thread *thread;
2340 user_handle_t win = 0;
2341
2342 if (req->win)
2343 {
2344 if (!(win = get_user_full_handle( req->win )) || !(thread = get_window_thread( win )))
2345 {
2346 set_error( STATUS_INVALID_HANDLE );
2347 return;
2348 }
2349 if (thread->process != current->process)
2350 {
2351 release_object( thread );
2352 set_error( STATUS_ACCESS_DENIED );
2353 return;
2354 }
2355 }
2356 else thread = (struct thread *)grab_object( current );
2357
2358 if (thread->queue && (timer = find_timer( thread->queue, win, req->msg, req->id )))
2359 free_timer( thread->queue, timer );
2360 else
2361 set_error( STATUS_INVALID_PARAMETER );
2362
2363 release_object( thread );
2364 }
2365
2366
2367 /* attach (or detach) thread inputs */
2368 DECL_HANDLER(attach_thread_input)
2369 {
2370 struct thread *thread_from = get_thread_from_id( req->tid_from );
2371 struct thread *thread_to = get_thread_from_id( req->tid_to );
2372
2373 if (!thread_from || !thread_to)
2374 {
2375 if (thread_from) release_object( thread_from );
2376 if (thread_to) release_object( thread_to );
2377 return;
2378 }
2379 if (thread_from != thread_to)
2380 {
2381 if (req->attach) attach_thread_input( thread_from, thread_to );
2382 else
2383 {
2384 if (thread_from->queue && thread_to->queue &&
2385 thread_from->queue->input == thread_to->queue->input)
2386 detach_thread_input( thread_from );
2387 else
2388 set_error( STATUS_ACCESS_DENIED );
2389 }
2390 }
2391 else set_error( STATUS_ACCESS_DENIED );
2392 release_object( thread_from );
2393 release_object( thread_to );
2394 }
2395
2396
2397 /* get thread input data */
2398 DECL_HANDLER(get_thread_input)
2399 {
2400 struct thread *thread = NULL;
2401 struct desktop *desktop;
2402 struct thread_input *input;
2403
2404 if (req->tid)
2405 {
2406 if (!(thread = get_thread_from_id( req->tid ))) return;
2407 if (!(desktop = get_thread_desktop( thread, 0 )))
2408 {
2409 release_object( thread );
2410 return;
2411 }
2412 input = thread->queue ? thread->queue->input : NULL;
2413 }
2414 else
2415 {
2416 if (!(desktop = get_thread_desktop( current, 0 ))) return;
2417 input = desktop->foreground_input; /* get the foreground thread info */
2418 }
2419
2420 if (input)
2421 {
2422 reply->focus = input->focus;
2423 reply->capture = input->capture;
2424 reply->active = input->active;
2425 reply->menu_owner = input->menu_owner;
2426 reply->move_size = input->move_size;
2427 reply->caret = input->caret;
2428 reply->cursor = input->cursor;
2429 reply->show_count = input->cursor_count;
2430 reply->rect = input->caret_rect;
2431 }
2432
2433 /* foreground window is active window of foreground thread */
2434 reply->foreground = desktop->foreground_input ? desktop->foreground_input->active : 0;
2435 if (thread) release_object( thread );
2436 release_object( desktop );
2437 }
2438
2439
2440 /* retrieve queue keyboard state for a given thread */
2441 DECL_HANDLER(get_key_state)
2442 {
2443 struct thread *thread;
2444 struct desktop *desktop;
2445 data_size_t size = min( 256, get_reply_max_size() );
2446
2447 if (!req->tid) /* get global async key state */
2448 {
2449 if (!(desktop = get_thread_desktop( current, 0 ))) return;
2450 if (req->key >= 0)
2451 {
2452 reply->state = desktop->keystate[req->key & 0xff];
2453 desktop->keystate[req->key & 0xff] &= ~0x40;
2454 }
2455 set_reply_data( desktop->keystate, size );
2456 release_object( desktop );
2457 }
2458 else
2459 {
2460 if (!(thread = get_thread_from_id( req->tid ))) return;
2461 if (thread->queue)
2462 {
2463 if (req->key >= 0) reply->state = thread->queue->input->keystate[req->key & 0xff];
2464 set_reply_data( thread->queue->input->keystate, size );
2465 }
2466 release_object( thread );
2467 }
2468 }
2469
2470
2471 /* set queue keyboard state for a given thread */
2472 DECL_HANDLER(set_key_state)
2473 {
2474 struct thread *thread;
2475 struct desktop *desktop;
2476 data_size_t size = min( 256, get_req_data_size() );
2477
2478 if (!req->tid) /* set global async key state */
2479 {
2480 if (!(desktop = get_thread_desktop( current, 0 ))) return;
2481 memcpy( desktop->keystate, get_req_data(), size );
2482 release_object( desktop );
2483 }
2484 else
2485 {
2486 if (!(thread = get_thread_from_id( req->tid ))) return;
2487 if (thread->queue) memcpy( thread->queue->input->keystate, get_req_data(), size );
2488 release_object( thread );
2489 }
2490 }
2491
2492
2493 /* set the system foreground window */
2494 DECL_HANDLER(set_foreground_window)
2495 {
2496 struct thread *thread = NULL;
2497 struct desktop *desktop;
2498 struct msg_queue *queue = get_current_queue();
2499
2500 if (!(desktop = get_thread_desktop( current, 0 ))) return;
2501 reply->previous = desktop->foreground_input ? desktop->foreground_input->active : 0;
2502 reply->send_msg_old = (reply->previous && desktop->foreground_input != queue->input);
2503 reply->send_msg_new = FALSE;
2504
2505 if (is_top_level_window( req->handle ) &&
2506 ((thread = get_window_thread( req->handle ))) &&
2507 (thread->queue->input->desktop == desktop))
2508 {
2509 set_foreground_input( desktop, thread->queue->input );
2510 reply->send_msg_new = (desktop->foreground_input != queue->input);
2511 }
2512 else set_win32_error( ERROR_INVALID_WINDOW_HANDLE );
2513
2514 if (thread) release_object( thread );
2515 release_object( desktop );
2516 }
2517
2518
2519 /* set the current thread focus window */
2520 DECL_HANDLER(set_focus_window)
2521 {
2522 struct msg_queue *queue = get_current_queue();
2523
2524 reply->previous = 0;
2525 if (queue && check_queue_input_window( queue, req->handle ))
2526 {
2527 reply->previous = queue->input->focus;
2528 queue->input->focus = get_user_full_handle( req->handle );
2529 }
2530 }
2531
2532
2533 /* set the current thread active window */
2534 DECL_HANDLER(set_active_window)
2535 {
2536 struct msg_queue *queue = get_current_queue();
2537
2538 reply->previous = 0;
2539 if (queue && check_queue_input_window( queue, req->handle ))
2540 {
2541 if (!req->handle || make_window_active( req->handle ))
2542 {
2543 reply->previous = queue->input->active;
2544 queue->input->active = get_user_full_handle( req->handle );
2545 }
2546 else set_error( STATUS_INVALID_HANDLE );
2547 }
2548 }
2549
2550
2551 /* set the current thread capture window */
2552 DECL_HANDLER(set_capture_window)
2553 {
2554 struct msg_queue *queue = get_current_queue();
2555
2556 reply->previous = reply->full_handle = 0;
2557 if (queue && check_queue_input_window( queue, req->handle ))
2558 {
2559 struct thread_input *input = queue->input;
2560
2561 /* if in menu mode, reject all requests to change focus, except if the menu bit is set */
2562 if (input->menu_owner && !(req->flags & CAPTURE_MENU))
2563 {
2564 set_error(STATUS_ACCESS_DENIED);
2565 return;
2566 }
2567 reply->previous = input->capture;
2568 input->capture = get_user_full_handle( req->handle );
2569 input->menu_owner = (req->flags & CAPTURE_MENU) ? input->capture : 0;
2570 input->move_size = (req->flags & CAPTURE_MOVESIZE) ? input->capture : 0;
2571 reply->full_handle = input->capture;
2572 }
2573 }
2574
2575
2576 /* Set the current thread caret window */
2577 DECL_HANDLER(set_caret_window)
2578 {
2579 struct msg_queue *queue = get_current_queue();
2580
2581 reply->previous = 0;
2582 if (queue && check_queue_input_window( queue, req->handle ))
2583 {
2584 struct thread_input *input = queue->input;
2585
2586 reply->previous = input->caret;
2587 reply->old_rect = input->caret_rect;
2588 reply->old_hide = input->caret_hide;
2589 reply->old_state = input->caret_state;
2590
2591 set_caret_window( input, get_user_full_handle(req->handle) );
2592 input->caret_rect.right = input->caret_rect.left + req->width;
2593 input->caret_rect.bottom = input->caret_rect.top + req->height;
2594 }
2595 }
2596
2597
2598 /* Set the current thread caret information */
2599 DECL_HANDLER(set_caret_info)
2600 {
2601 struct msg_queue *queue = get_current_queue();
2602 struct thread_input *input;
2603
2604 if (!queue) return;
2605 input = queue->input;
2606 reply->full_handle = input->caret;
2607 reply->old_rect = input->caret_rect;
2608 reply->old_hide = input->caret_hide;
2609 reply->old_state = input->caret_state;
2610
2611 if (req->handle && get_user_full_handle(req->handle) != input->caret)
2612 {
2613 set_error( STATUS_ACCESS_DENIED );
2614 return;
2615 }
2616 if (req->flags & SET_CARET_POS)
2617 {
2618 input->caret_rect.right += req->x - input->caret_rect.left;
2619 input->caret_rect.bottom += req->y - input->caret_rect.top;
2620 input->caret_rect.left = req->x;
2621 input->caret_rect.top = req->y;
2622 }
2623 if (req->flags & SET_CARET_HIDE)
2624 {
2625 input->caret_hide += req->hide;
2626 if (input->caret_hide < 0) input->caret_hide = 0;
2627 }
2628 if (req->flags & SET_CARET_STATE)
2629 {
2630 if (req->state == -1) input->caret_state = !input->caret_state;
2631 else input->caret_state = !!req->state;
2632 }
2633 }
2634
2635
2636 /* get the time of the last input event */
2637 DECL_HANDLER(get_last_input_time)
2638 {
2639 reply->time = last_input_time;
2640 }
2641
2642 /* set/get the current cursor */
2643 DECL_HANDLER(set_cursor)
2644 {
2645 struct msg_queue *queue = get_current_queue();
2646 struct thread_input *input;
2647
2648 if (!queue) return;
2649 input = queue->input;
2650
2651 reply->prev_handle = input->cursor;
2652 reply->prev_count = input->cursor_count;
2653 reply->prev_x = input->desktop->cursor.x;
2654 reply->prev_y = input->desktop->cursor.y;
2655
2656 if (req->flags & SET_CURSOR_HANDLE)
2657 {
2658 if (req->handle && !get_user_object( req->handle, USER_CLIENT ))
2659 {
2660 set_win32_error( ERROR_INVALID_CURSOR_HANDLE );
2661 return;
2662 }
2663 input->cursor = req->handle;
2664 }
2665 if (req->flags & SET_CURSOR_COUNT)
2666 {
2667 queue->cursor_count += req->show_count;
2668 input->cursor_count += req->show_count;
2669 }
2670 if (req->flags & SET_CURSOR_POS)
2671 {
2672 set_cursor_pos( input->desktop, req->x, req->y );
2673 }
2674 if (req->flags & SET_CURSOR_CLIP)
2675 {
2676 struct desktop *desktop = input->desktop;
2677
2678 /* only the desktop owner can set the message */
2679 if (req->clip_msg && get_top_window_owner(desktop) == current->process)
2680 desktop->cursor.clip_msg = req->clip_msg;
2681
2682 set_clip_rectangle( desktop, &req->clip );
2683 }
2684
2685 reply->new_x = input->desktop->cursor.x;
2686 reply->new_y = input->desktop->cursor.y;
2687 reply->new_clip = input->desktop->cursor.clip;
2688 reply->last_change = input->desktop->cursor.last_change;
2689 }
Maarten's multimedia branch