2 * Server-side message queues
4 * Copyright (C) 2000 Alexandre Julliard
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.
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.
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
22 #include "wine/port.h"
30 #define WIN32_NO_STATUS
44 #define WM_NCMOUSEFIRST WM_NCMOUSEMOVE
45 #define WM_NCMOUSELAST (WM_NCMOUSEFIRST+(WM_MOUSELAST-WM_MOUSEFIRST))
47 enum message_kind { SEND_MESSAGE, POST_MESSAGE };
48 #define NB_MSG_KINDS (POST_MESSAGE+1)
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 result; /* reply result */
60 unsigned int error; /* error code to pass back to sender */
61 struct message *callback_msg; /* message to queue for callback */
62 void *data; /* message reply data */
63 unsigned int data_size; /* size of message reply data */
64 struct timeout_user *timeout; /* result timeout */
69 struct list entry; /* entry in message list */
70 enum message_type type; /* message type */
71 user_handle_t win; /* window handle */
72 unsigned int msg; /* message code */
73 unsigned long wparam; /* parameters */
74 unsigned long lparam; /* parameters */
75 int x; /* x position */
76 int y; /* y position */
77 unsigned int time; /* message time */
78 unsigned int info; /* extra info */
79 user_handle_t hook; /* winevent hook handle */
80 void *hook_proc; /* winevent hook proc address */
81 void *data; /* message data for sent messages */
82 unsigned int data_size; /* size of message data */
83 unsigned int unique_id; /* unique id for nested hw message waits */
84 struct message_result *result; /* result in sender queue */
89 struct list entry; /* entry in timer list */
90 struct timeval when; /* next expiration */
91 unsigned int rate; /* timer rate in ms */
92 user_handle_t win; /* window handle */
93 unsigned int msg; /* message to post */
94 unsigned int id; /* timer id */
95 unsigned long lparam; /* lparam for message */
100 struct object obj; /* object header */
101 struct desktop *desktop; /* desktop that this thread input belongs to */
102 user_handle_t focus; /* focus window */
103 user_handle_t capture; /* capture window */
104 user_handle_t active; /* active window */
105 user_handle_t menu_owner; /* current menu owner window */
106 user_handle_t move_size; /* current moving/resizing window */
107 user_handle_t caret; /* caret window */
108 rectangle_t caret_rect; /* caret rectangle */
109 int caret_hide; /* caret hide count */
110 int caret_state; /* caret on/off state */
111 struct list msg_list; /* list of hardware messages */
112 unsigned char keystate[256]; /* state of each key */
117 struct object obj; /* object header */
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 struct list msg_list[NB_MSG_KINDS]; /* lists of messages */
126 struct list send_result; /* stack of sent messages waiting for result */
127 struct list callback_result; /* list of callback messages waiting for result */
128 struct message_result *recv_result; /* stack of received messages waiting for result */
129 struct list pending_timers; /* list of pending timers */
130 struct list expired_timers; /* list of expired timers */
131 unsigned int next_timer_id; /* id for the next timer with a 0 window */
132 struct timeout_user *timeout; /* timeout for next timer to expire */
133 struct thread_input *input; /* thread input descriptor */
134 struct hook_table *hooks; /* hook table */
135 struct timeval last_get_msg; /* time of last get message call */
138 static void msg_queue_dump( struct object *obj, int verbose );
139 static int msg_queue_add_queue( struct object *obj, struct wait_queue_entry *entry );
140 static void msg_queue_remove_queue( struct object *obj, struct wait_queue_entry *entry );
141 static int msg_queue_signaled( struct object *obj, struct thread *thread );
142 static int msg_queue_satisfied( struct object *obj, struct thread *thread );
143 static void msg_queue_destroy( struct object *obj );
144 static void thread_input_dump( struct object *obj, int verbose );
145 static void thread_input_destroy( struct object *obj );
146 static void timer_callback( void *private );
148 static const struct object_ops msg_queue_ops =
150 sizeof(struct msg_queue), /* size */
151 msg_queue_dump, /* dump */
152 msg_queue_add_queue, /* add_queue */
153 msg_queue_remove_queue, /* remove_queue */
154 msg_queue_signaled, /* signaled */
155 msg_queue_satisfied, /* satisfied */
156 no_signal, /* signal */
157 no_get_fd, /* get_fd */
158 no_map_access, /* map_access */
159 no_lookup_name, /* lookup_name */
160 no_close_handle, /* close_handle */
161 msg_queue_destroy /* destroy */
165 static const struct object_ops thread_input_ops =
167 sizeof(struct thread_input), /* size */
168 thread_input_dump, /* dump */
169 no_add_queue, /* add_queue */
170 NULL, /* remove_queue */
172 NULL, /* satisfied */
173 no_signal, /* signal */
174 no_get_fd, /* get_fd */
175 no_map_access, /* map_access */
176 no_lookup_name, /* lookup_name */
177 no_close_handle, /* close_handle */
178 thread_input_destroy /* destroy */
181 /* pointer to input structure of foreground thread */
182 static struct thread_input *foreground_input;
183 static unsigned int last_input_time;
186 /* set the caret window in a given thread input */
187 static void set_caret_window( struct thread_input *input, user_handle_t win )
189 if (!win || win != input->caret)
191 input->caret_rect.left = 0;
192 input->caret_rect.top = 0;
193 input->caret_rect.right = 0;
194 input->caret_rect.bottom = 0;
197 input->caret_hide = 1;
198 input->caret_state = 0;
201 /* create a thread input object */
202 static struct thread_input *create_thread_input( struct thread *thread )
204 struct thread_input *input;
206 if ((input = alloc_object( &thread_input_ops )))
211 input->menu_owner = 0;
212 input->move_size = 0;
213 list_init( &input->msg_list );
214 set_caret_window( input, 0 );
215 memset( input->keystate, 0, sizeof(input->keystate) );
217 if (!(input->desktop = get_thread_desktop( thread, 0 /* FIXME: access rights */ )))
219 release_object( input );
226 /* release the thread input data of a given thread */
227 static inline void release_thread_input( struct thread *thread )
229 struct thread_input *input = thread->queue->input;
232 release_object( input );
233 thread->queue->input = NULL;
236 /* create a message queue object */
237 static struct msg_queue *create_msg_queue( struct thread *thread, struct thread_input *input )
239 struct msg_queue *queue;
242 if (!input && !(input = create_thread_input( thread ))) return NULL;
243 if ((queue = alloc_object( &msg_queue_ops )))
245 queue->wake_bits = 0;
246 queue->wake_mask = 0;
247 queue->changed_bits = 0;
248 queue->changed_mask = 0;
249 queue->paint_count = 0;
250 queue->quit_message = 0;
251 queue->recv_result = NULL;
252 queue->next_timer_id = 1;
253 queue->timeout = NULL;
254 queue->input = (struct thread_input *)grab_object( input );
256 gettimeofday( &queue->last_get_msg, NULL );
257 list_init( &queue->send_result );
258 list_init( &queue->callback_result );
259 list_init( &queue->pending_timers );
260 list_init( &queue->expired_timers );
261 for (i = 0; i < NB_MSG_KINDS; i++) list_init( &queue->msg_list[i] );
263 thread->queue = queue;
264 if (!thread->process->queue)
265 thread->process->queue = (struct msg_queue *)grab_object( queue );
267 release_object( input );
271 /* free the message queue of a thread at thread exit */
272 void free_msg_queue( struct thread *thread )
274 struct process *process = thread->process;
276 remove_thread_hooks( thread );
277 if (!thread->queue) return;
278 if (process->queue == thread->queue) /* is it the process main queue? */
280 release_object( process->queue );
281 process->queue = NULL;
282 if (process->idle_event)
284 set_event( process->idle_event );
285 release_object( process->idle_event );
286 process->idle_event = NULL;
289 release_object( thread->queue );
290 thread->queue = NULL;
293 /* get the hook table for a given thread */
294 struct hook_table *get_queue_hooks( struct thread *thread )
296 if (!thread->queue) return NULL;
297 return thread->queue->hooks;
300 /* set the hook table for a given thread, allocating the queue if needed */
301 void set_queue_hooks( struct thread *thread, struct hook_table *hooks )
303 struct msg_queue *queue = thread->queue;
304 if (!queue && !(queue = create_msg_queue( thread, NULL ))) return;
305 if (queue->hooks) release_object( queue->hooks );
306 queue->hooks = hooks;
309 /* check the queue status */
310 inline static int is_signaled( struct msg_queue *queue )
312 return ((queue->wake_bits & queue->wake_mask) || (queue->changed_bits & queue->changed_mask));
315 /* set some queue bits */
316 inline static void set_queue_bits( struct msg_queue *queue, unsigned int bits )
318 queue->wake_bits |= bits;
319 queue->changed_bits |= bits;
320 if (is_signaled( queue )) wake_up( &queue->obj, 0 );
323 /* clear some queue bits */
324 inline static void clear_queue_bits( struct msg_queue *queue, unsigned int bits )
326 queue->wake_bits &= ~bits;
327 queue->changed_bits &= ~bits;
330 /* check whether msg is a keyboard message */
331 inline static int is_keyboard_msg( struct message *msg )
333 return (msg->msg >= WM_KEYFIRST && msg->msg <= WM_KEYLAST);
336 /* check if message is matched by the filter */
337 inline static int check_msg_filter( unsigned int msg, unsigned int first, unsigned int last )
339 return (msg >= first && msg <= last);
342 /* check whether a message filter contains at least one potential hardware message */
343 inline static int filter_contains_hw_range( unsigned int first, unsigned int last )
345 /* hardware message ranges are (in numerical order):
346 * WM_NCMOUSEFIRST .. WM_NCMOUSELAST
347 * WM_KEYFIRST .. WM_KEYLAST
348 * WM_MOUSEFIRST .. WM_MOUSELAST
350 if (last < WM_NCMOUSEFIRST) return 0;
351 if (first > WM_NCMOUSELAST && last < WM_KEYFIRST) return 0;
352 if (first > WM_KEYLAST && last < WM_MOUSEFIRST) return 0;
353 if (first > WM_MOUSELAST) return 0;
357 /* get the QS_* bit corresponding to a given hardware message */
358 inline static int get_hardware_msg_bit( struct message *msg )
360 if (msg->msg == WM_MOUSEMOVE || msg->msg == WM_NCMOUSEMOVE) return QS_MOUSEMOVE;
361 if (is_keyboard_msg( msg )) return QS_KEY;
362 return QS_MOUSEBUTTON;
365 /* get the current thread queue, creating it if needed */
366 inline static struct msg_queue *get_current_queue(void)
368 struct msg_queue *queue = current->queue;
369 if (!queue) queue = create_msg_queue( current, NULL );
373 /* get a (pseudo-)unique id to tag hardware messages */
374 inline static unsigned int get_unique_id(void)
376 static unsigned int id;
377 if (!++id) id = 1; /* avoid an id of 0 */
381 /* try to merge a message with the last in the list; return 1 if successful */
382 static int merge_message( struct thread_input *input, const struct message *msg )
384 struct message *prev;
385 struct list *ptr = list_tail( &input->msg_list );
388 prev = LIST_ENTRY( ptr, struct message, entry );
389 if (prev->unique_id) return 0;
390 if (prev->result) return 0;
391 if (prev->win != msg->win) return 0;
392 if (prev->msg != msg->msg) return 0;
393 if (prev->type != msg->type) return 0;
394 /* now we can merge it */
395 prev->wparam = msg->wparam;
396 prev->lparam = msg->lparam;
399 prev->time = msg->time;
400 prev->info = msg->info;
404 /* free a result structure */
405 static void free_result( struct message_result *result )
407 if (result->timeout) remove_timeout_user( result->timeout );
408 if (result->data) free( result->data );
409 if (result->callback_msg) free( result->callback_msg );
413 /* remove the result from the sender list it is on */
414 static inline void remove_result_from_sender( struct message_result *result )
416 assert( result->sender );
418 list_remove( &result->sender_entry );
419 result->sender = NULL;
420 if (!result->receiver) free_result( result );
423 /* store the message result in the appropriate structure */
424 static void store_message_result( struct message_result *res, unsigned int result,
427 res->result = result;
432 remove_timeout_user( res->timeout );
437 if (res->callback_msg)
439 /* queue the callback message in the sender queue */
440 res->callback_msg->lparam = result;
441 list_add_tail( &res->sender->msg_list[SEND_MESSAGE], &res->callback_msg->entry );
442 set_queue_bits( res->sender, QS_SENDMESSAGE );
443 res->callback_msg = NULL;
444 remove_result_from_sender( res );
448 /* wake sender queue if waiting on this result */
449 if (list_head(&res->sender->send_result) == &res->sender_entry)
450 set_queue_bits( res->sender, QS_SMRESULT );
456 /* free a message when deleting a queue or window */
457 static void free_message( struct message *msg )
459 struct message_result *result = msg->result;
465 result->receiver = NULL;
466 store_message_result( result, 0, STATUS_ACCESS_DENIED /*FIXME*/ );
468 else free_result( result );
470 if (msg->data) free( msg->data );
474 /* remove (and free) a message from a message list */
475 static void remove_queue_message( struct msg_queue *queue, struct message *msg,
476 enum message_kind kind )
478 list_remove( &msg->entry );
482 if (list_empty( &queue->msg_list[kind] )) clear_queue_bits( queue, QS_SENDMESSAGE );
485 if (list_empty( &queue->msg_list[kind] ) && !queue->quit_message)
486 clear_queue_bits( queue, QS_POSTMESSAGE|QS_ALLPOSTMESSAGE );
492 /* message timed out without getting a reply */
493 static void result_timeout( void *private )
495 struct message_result *result = private;
497 assert( !result->replied );
499 result->timeout = NULL;
501 if (result->msg) /* not received yet */
503 struct message *msg = result->msg;
507 remove_queue_message( result->receiver, msg, SEND_MESSAGE );
508 result->receiver = NULL;
511 free_result( result );
516 store_message_result( result, 0, STATUS_TIMEOUT );
519 /* allocate and fill a message result structure */
520 static struct message_result *alloc_message_result( struct msg_queue *send_queue,
521 struct msg_queue *recv_queue,
522 struct message *msg, int timeout,
523 void *callback, unsigned int callback_data )
525 struct message_result *result = mem_alloc( sizeof(*result) );
529 result->sender = send_queue;
530 result->receiver = recv_queue;
533 result->data_size = 0;
534 result->timeout = NULL;
536 if (msg->type == MSG_CALLBACK)
538 struct message *callback_msg = mem_alloc( sizeof(*callback_msg) );
544 callback_msg->type = MSG_CALLBACK_RESULT;
545 callback_msg->win = msg->win;
546 callback_msg->msg = msg->msg;
547 callback_msg->wparam = (unsigned long)callback;
548 callback_msg->lparam = 0;
549 callback_msg->time = get_tick_count();
552 callback_msg->info = callback_data;
553 callback_msg->hook = 0;
554 callback_msg->hook_proc = NULL;
555 callback_msg->result = NULL;
556 callback_msg->data = NULL;
557 callback_msg->data_size = 0;
559 result->callback_msg = callback_msg;
560 list_add_head( &send_queue->callback_result, &result->sender_entry );
564 result->callback_msg = NULL;
565 list_add_head( &send_queue->send_result, &result->sender_entry );
571 gettimeofday( &when, NULL );
572 add_timeout( &when, timeout );
573 result->timeout = add_timeout_user( &when, result_timeout, result );
579 /* receive a message, removing it from the sent queue */
580 static void receive_message( struct msg_queue *queue, struct message *msg,
581 struct get_message_reply *reply )
583 struct message_result *result = msg->result;
585 reply->total = msg->data_size;
586 if (msg->data_size > get_reply_max_size())
588 set_error( STATUS_BUFFER_OVERFLOW );
591 reply->type = msg->type;
592 reply->win = msg->win;
593 reply->msg = msg->msg;
594 reply->wparam = msg->wparam;
595 reply->lparam = msg->lparam;
598 reply->time = msg->time;
599 reply->info = msg->info;
600 reply->hook = msg->hook;
601 reply->hook_proc = msg->hook_proc;
603 if (msg->data) set_reply_data_ptr( msg->data, msg->data_size );
605 list_remove( &msg->entry );
606 /* put the result on the receiver result stack */
610 result->recv_next = queue->recv_result;
611 queue->recv_result = result;
614 if (list_empty( &queue->msg_list[SEND_MESSAGE] )) clear_queue_bits( queue, QS_SENDMESSAGE );
617 /* set the result of the current received message */
618 static void reply_message( struct msg_queue *queue, unsigned int result,
619 unsigned int error, int remove, const void *data, size_t len )
621 struct message_result *res = queue->recv_result;
625 queue->recv_result = res->recv_next;
626 res->receiver = NULL;
627 if (!res->sender) /* no one waiting for it */
635 if (len && (res->data = memdup( data, len ))) res->data_size = len;
636 store_message_result( res, result, error );
640 /* retrieve a posted message */
641 static int get_posted_message( struct msg_queue *queue, user_handle_t win,
642 unsigned int first, unsigned int last, unsigned int flags,
643 struct get_message_reply *reply )
647 /* check against the filters */
648 LIST_FOR_EACH_ENTRY( msg, &queue->msg_list[POST_MESSAGE], struct message, entry )
650 if (win && msg->win && msg->win != win && !is_child_window( win, msg->win )) continue;
651 if (!check_msg_filter( msg->msg, first, last )) continue;
652 goto found; /* found one */
656 /* return it to the app */
658 reply->total = msg->data_size;
659 if (msg->data_size > get_reply_max_size())
661 set_error( STATUS_BUFFER_OVERFLOW );
664 reply->type = msg->type;
665 reply->win = msg->win;
666 reply->msg = msg->msg;
667 reply->wparam = msg->wparam;
668 reply->lparam = msg->lparam;
671 reply->time = msg->time;
672 reply->info = msg->info;
674 if (flags & GET_MSG_REMOVE)
678 set_reply_data_ptr( msg->data, msg->data_size );
682 remove_queue_message( queue, msg, POST_MESSAGE );
684 else if (msg->data) set_reply_data( msg->data, msg->data_size );
689 static int get_quit_message( struct msg_queue *queue, unsigned int flags,
690 struct get_message_reply *reply )
692 if (queue->quit_message)
695 reply->type = MSG_POSTED;
697 reply->msg = WM_QUIT;
698 reply->wparam = queue->exit_code;
702 reply->time = get_tick_count();
705 if (flags & GET_MSG_REMOVE)
707 queue->quit_message = 0;
708 if (list_empty( &queue->msg_list[POST_MESSAGE] ))
709 clear_queue_bits( queue, QS_POSTMESSAGE|QS_ALLPOSTMESSAGE );
717 /* empty a message list and free all the messages */
718 static void empty_msg_list( struct list *list )
722 while ((ptr = list_head( list )) != NULL)
724 struct message *msg = LIST_ENTRY( ptr, struct message, entry );
725 list_remove( &msg->entry );
730 /* cleanup all pending results when deleting a queue */
731 static void cleanup_results( struct msg_queue *queue )
735 while ((entry = list_head( &queue->send_result )) != NULL)
737 remove_result_from_sender( LIST_ENTRY( entry, struct message_result, sender_entry ) );
740 while ((entry = list_head( &queue->callback_result )) != NULL)
742 remove_result_from_sender( LIST_ENTRY( entry, struct message_result, sender_entry ) );
745 while (queue->recv_result)
746 reply_message( queue, 0, STATUS_ACCESS_DENIED /*FIXME*/, 1, NULL, 0 );
749 /* check if the thread owning the queue is hung (not checking for messages) */
750 static int is_queue_hung( struct msg_queue *queue )
753 struct wait_queue_entry *entry;
755 gettimeofday( &now, NULL );
756 if (now.tv_sec - queue->last_get_msg.tv_sec <= 5)
757 return 0; /* less than 5 seconds since last get message -> not hung */
759 LIST_FOR_EACH_ENTRY( entry, &queue->obj.wait_queue, struct wait_queue_entry, entry )
761 if (entry->thread->queue == queue)
762 return 0; /* thread is waiting on queue -> not hung */
767 static int msg_queue_add_queue( struct object *obj, struct wait_queue_entry *entry )
769 struct msg_queue *queue = (struct msg_queue *)obj;
770 struct process *process = entry->thread->process;
772 /* a thread can only wait on its own queue */
773 if (entry->thread->queue != queue)
775 set_error( STATUS_ACCESS_DENIED );
778 /* if waiting on the main process queue, set the idle event */
779 if (process->queue == queue)
781 if (process->idle_event) set_event( process->idle_event );
783 add_queue( obj, entry );
787 static void msg_queue_remove_queue(struct object *obj, struct wait_queue_entry *entry )
789 struct msg_queue *queue = (struct msg_queue *)obj;
790 struct process *process = entry->thread->process;
792 remove_queue( obj, entry );
794 assert( entry->thread->queue == queue );
796 /* if waiting on the main process queue, reset the idle event */
797 if (process->queue == queue)
799 if (process->idle_event) reset_event( process->idle_event );
803 static void msg_queue_dump( struct object *obj, int verbose )
805 struct msg_queue *queue = (struct msg_queue *)obj;
806 fprintf( stderr, "Msg queue bits=%x mask=%x\n",
807 queue->wake_bits, queue->wake_mask );
810 static int msg_queue_signaled( struct object *obj, struct thread *thread )
812 struct msg_queue *queue = (struct msg_queue *)obj;
813 return is_signaled( queue );
816 static int msg_queue_satisfied( struct object *obj, struct thread *thread )
818 struct msg_queue *queue = (struct msg_queue *)obj;
819 queue->wake_mask = 0;
820 queue->changed_mask = 0;
821 return 0; /* Not abandoned */
824 static void msg_queue_destroy( struct object *obj )
826 struct msg_queue *queue = (struct msg_queue *)obj;
830 cleanup_results( queue );
831 for (i = 0; i < NB_MSG_KINDS; i++) empty_msg_list( &queue->msg_list[i] );
833 while ((ptr = list_head( &queue->pending_timers )))
835 struct timer *timer = LIST_ENTRY( ptr, struct timer, entry );
836 list_remove( &timer->entry );
839 while ((ptr = list_head( &queue->expired_timers )))
841 struct timer *timer = LIST_ENTRY( ptr, struct timer, entry );
842 list_remove( &timer->entry );
845 if (queue->timeout) remove_timeout_user( queue->timeout );
846 if (queue->input) release_object( queue->input );
847 if (queue->hooks) release_object( queue->hooks );
850 static void thread_input_dump( struct object *obj, int verbose )
852 struct thread_input *input = (struct thread_input *)obj;
853 fprintf( stderr, "Thread input focus=%p capture=%p active=%p\n",
854 input->focus, input->capture, input->active );
857 static void thread_input_destroy( struct object *obj )
859 struct thread_input *input = (struct thread_input *)obj;
861 if (foreground_input == input) foreground_input = NULL;
862 empty_msg_list( &input->msg_list );
863 if (input->desktop) release_object( input->desktop );
866 /* fix the thread input data when a window is destroyed */
867 inline static void thread_input_cleanup_window( struct msg_queue *queue, user_handle_t window )
869 struct thread_input *input = queue->input;
871 if (window == input->focus) input->focus = 0;
872 if (window == input->capture) input->capture = 0;
873 if (window == input->active) input->active = 0;
874 if (window == input->menu_owner) input->menu_owner = 0;
875 if (window == input->move_size) input->move_size = 0;
876 if (window == input->caret) set_caret_window( input, 0 );
879 /* check if the specified window can be set in the input data of a given queue */
880 static int check_queue_input_window( struct msg_queue *queue, user_handle_t window )
882 struct thread *thread;
885 if (!window) return 1; /* we can always clear the data */
887 if ((thread = get_window_thread( window )))
889 ret = (queue->input == thread->queue->input);
890 if (!ret) set_error( STATUS_ACCESS_DENIED );
891 release_object( thread );
893 else set_error( STATUS_INVALID_HANDLE );
898 /* make sure the specified thread has a queue */
899 int init_thread_queue( struct thread *thread )
901 if (thread->queue) return 1;
902 return (create_msg_queue( thread, NULL ) != NULL);
905 /* attach two thread input data structures */
906 int attach_thread_input( struct thread *thread_from, struct thread *thread_to )
908 struct desktop *desktop;
909 struct thread_input *input;
911 if (!thread_to->queue && !(thread_to->queue = create_msg_queue( thread_to, NULL ))) return 0;
912 if (!(desktop = get_thread_desktop( thread_from, 0 ))) return 0;
913 input = (struct thread_input *)grab_object( thread_to->queue->input );
914 if (input->desktop != desktop)
916 set_error( STATUS_ACCESS_DENIED );
917 release_object( input );
918 release_object( desktop );
921 release_object( desktop );
923 if (thread_from->queue)
925 release_thread_input( thread_from );
926 thread_from->queue->input = input;
930 if (!(thread_from->queue = create_msg_queue( thread_from, input ))) return 0;
932 memset( input->keystate, 0, sizeof(input->keystate) );
936 /* detach two thread input data structures */
937 void detach_thread_input( struct thread *thread_from )
939 struct thread_input *input;
941 if ((input = create_thread_input( thread_from )))
943 release_thread_input( thread_from );
944 thread_from->queue->input = input;
949 /* set the next timer to expire */
950 static void set_next_timer( struct msg_queue *queue )
956 remove_timeout_user( queue->timeout );
957 queue->timeout = NULL;
959 if ((ptr = list_head( &queue->pending_timers )))
961 struct timer *timer = LIST_ENTRY( ptr, struct timer, entry );
962 queue->timeout = add_timeout_user( &timer->when, timer_callback, queue );
964 /* set/clear QS_TIMER bit */
965 if (list_empty( &queue->expired_timers ))
966 clear_queue_bits( queue, QS_TIMER );
968 set_queue_bits( queue, QS_TIMER );
971 /* find a timer from its window and id */
972 static struct timer *find_timer( struct msg_queue *queue, user_handle_t win,
973 unsigned int msg, unsigned int id )
977 /* we need to search both lists */
979 LIST_FOR_EACH( ptr, &queue->pending_timers )
981 struct timer *timer = LIST_ENTRY( ptr, struct timer, entry );
982 if (timer->win == win && timer->msg == msg && timer->id == id) return timer;
984 LIST_FOR_EACH( ptr, &queue->expired_timers )
986 struct timer *timer = LIST_ENTRY( ptr, struct timer, entry );
987 if (timer->win == win && timer->msg == msg && timer->id == id) return timer;
992 /* callback for the next timer expiration */
993 static void timer_callback( void *private )
995 struct msg_queue *queue = private;
998 queue->timeout = NULL;
999 /* move on to the next timer */
1000 ptr = list_head( &queue->pending_timers );
1002 list_add_tail( &queue->expired_timers, ptr );
1003 set_next_timer( queue );
1006 /* link a timer at its rightful place in the queue list */
1007 static void link_timer( struct msg_queue *queue, struct timer *timer )
1011 for (ptr = queue->pending_timers.next; ptr != &queue->pending_timers; ptr = ptr->next)
1013 struct timer *t = LIST_ENTRY( ptr, struct timer, entry );
1014 if (!time_before( &t->when, &timer->when )) break;
1016 list_add_before( ptr, &timer->entry );
1019 /* remove a timer from the queue timer list and free it */
1020 static void free_timer( struct msg_queue *queue, struct timer *timer )
1022 list_remove( &timer->entry );
1024 set_next_timer( queue );
1027 /* restart an expired timer */
1028 static void restart_timer( struct msg_queue *queue, struct timer *timer )
1032 list_remove( &timer->entry );
1033 gettimeofday( &now, NULL );
1034 while (!time_before( &now, &timer->when )) add_timeout( &timer->when, timer->rate );
1035 link_timer( queue, timer );
1036 set_next_timer( queue );
1039 /* find an expired timer matching the filtering parameters */
1040 static struct timer *find_expired_timer( struct msg_queue *queue, user_handle_t win,
1041 unsigned int get_first, unsigned int get_last,
1046 LIST_FOR_EACH( ptr, &queue->expired_timers )
1048 struct timer *timer = LIST_ENTRY( ptr, struct timer, entry );
1049 if (win && timer->win != win) continue;
1050 if (check_msg_filter( timer->msg, get_first, get_last ))
1052 if (remove) restart_timer( queue, timer );
1060 static struct timer *set_timer( struct msg_queue *queue, unsigned int rate )
1062 struct timer *timer = mem_alloc( sizeof(*timer) );
1065 timer->rate = max( rate, 1 );
1066 gettimeofday( &timer->when, NULL );
1067 add_timeout( &timer->when, rate );
1068 link_timer( queue, timer );
1069 /* check if we replaced the next timer */
1070 if (list_head( &queue->pending_timers ) == &timer->entry) set_next_timer( queue );
1075 /* change the input key state for a given key */
1076 static void set_input_key_state( struct thread_input *input, unsigned char key, int down )
1080 if (!(input->keystate[key] & 0x80)) input->keystate[key] ^= 0x01;
1081 input->keystate[key] |= 0x80;
1083 else input->keystate[key] &= ~0x80;
1086 /* update the input key state for a keyboard message */
1087 static void update_input_key_state( struct thread_input *input, const struct message *msg )
1090 int down = 0, extended;
1094 case WM_LBUTTONDOWN:
1098 set_input_key_state( input, VK_LBUTTON, down );
1100 case WM_MBUTTONDOWN:
1104 set_input_key_state( input, VK_MBUTTON, down );
1106 case WM_RBUTTONDOWN:
1110 set_input_key_state( input, VK_RBUTTON, down );
1112 case WM_XBUTTONDOWN:
1116 if (msg->wparam == XBUTTON1) set_input_key_state( input, VK_XBUTTON1, down );
1117 else if (msg->wparam == XBUTTON2) set_input_key_state( input, VK_XBUTTON2, down );
1125 key = (unsigned char)msg->wparam;
1126 extended = ((msg->lparam >> 16) & KF_EXTENDED) != 0;
1127 set_input_key_state( input, key, down );
1131 set_input_key_state( input, extended ? VK_RSHIFT : VK_LSHIFT, down );
1134 set_input_key_state( input, extended ? VK_RCONTROL : VK_LCONTROL, down );
1137 set_input_key_state( input, extended ? VK_RMENU : VK_LMENU, down );
1141 set_input_key_state( input, VK_CONTROL, down );
1145 set_input_key_state( input, VK_MENU, down );
1149 set_input_key_state( input, VK_SHIFT, down );
1156 /* release the hardware message currently being processed by the given thread */
1157 static void release_hardware_message( struct msg_queue *queue, unsigned int hw_id,
1158 int remove, user_handle_t new_win )
1160 struct thread_input *input = queue->input;
1161 struct message *msg;
1163 LIST_FOR_EACH_ENTRY( msg, &input->msg_list, struct message, entry )
1165 if (msg->unique_id == hw_id) break;
1167 if (&msg->entry == &input->msg_list) return; /* not found */
1169 /* clear the queue bit for that message */
1170 if (remove || new_win)
1172 struct message *other;
1175 clr_bit = get_hardware_msg_bit( msg );
1176 LIST_FOR_EACH_ENTRY( other, &input->msg_list, struct message, entry )
1178 if (other != msg && get_hardware_msg_bit( other ) == clr_bit)
1184 if (clr_bit) clear_queue_bits( queue, clr_bit );
1187 if (new_win) /* set the new window */
1189 struct thread *owner = get_window_thread( new_win );
1192 if (owner->queue->input == input)
1195 set_queue_bits( owner->queue, get_hardware_msg_bit( msg ));
1198 release_object( owner );
1203 update_input_key_state( input, msg );
1204 list_remove( &msg->entry );
1205 free_message( msg );
1209 /* find the window that should receive a given hardware message */
1210 static user_handle_t find_hardware_message_window( struct thread_input *input, struct message *msg,
1211 unsigned int *msg_code )
1213 user_handle_t win = 0;
1215 *msg_code = msg->msg;
1216 if (is_keyboard_msg( msg ))
1218 if (input && !(win = input->focus))
1220 win = input->active;
1221 if (*msg_code < WM_SYSKEYDOWN) *msg_code += WM_SYSKEYDOWN - WM_KEYDOWN;
1224 else /* mouse message */
1226 if (!input || !(win = input->capture))
1228 if (!(win = msg->win) || !is_window_visible( win ))
1230 if (input) win = window_from_point( input->desktop, msg->x, msg->y );
1237 /* queue a hardware message into a given thread input */
1238 static void queue_hardware_message( struct msg_queue *queue, struct message *msg )
1241 struct thread *thread;
1242 struct thread_input *input = queue ? queue->input : foreground_input;
1243 unsigned int msg_code;
1245 last_input_time = get_tick_count();
1246 win = find_hardware_message_window( input, msg, &msg_code );
1247 if (!win || !(thread = get_window_thread(win)))
1249 if (input) update_input_key_state( input, msg );
1253 input = thread->queue->input;
1255 if (msg->msg == WM_MOUSEMOVE && merge_message( input, msg )) free( msg );
1258 msg->unique_id = 0; /* will be set once we return it to the app */
1259 list_add_tail( &input->msg_list, &msg->entry );
1260 set_queue_bits( thread->queue, get_hardware_msg_bit(msg) );
1262 release_object( thread );
1265 /* check message filter for a hardware message */
1266 static int check_hw_message_filter( user_handle_t win, unsigned int msg_code,
1267 user_handle_t filter_win, unsigned int first, unsigned int last )
1269 if (msg_code >= WM_KEYFIRST && msg_code <= WM_KEYLAST)
1271 /* we can only test the window for a keyboard message since the
1272 * dest window for a mouse message depends on hittest */
1273 if (filter_win && win != filter_win && !is_child_window( filter_win, win ))
1275 /* the message code is final for a keyboard message, we can simply check it */
1276 return check_msg_filter( msg_code, first, last );
1278 else /* mouse message */
1280 /* we need to check all possible values that the message can have in the end */
1282 if (check_msg_filter( msg_code, first, last )) return 1;
1283 if (msg_code == WM_MOUSEWHEEL) return 0; /* no other possible value for this one */
1285 /* all other messages can become non-client messages */
1286 if (check_msg_filter( msg_code + (WM_NCMOUSEFIRST - WM_MOUSEFIRST), first, last )) return 1;
1288 /* clicks can become double-clicks or non-client double-clicks */
1289 if (msg_code == WM_LBUTTONDOWN || msg_code == WM_MBUTTONDOWN ||
1290 msg_code == WM_RBUTTONDOWN || msg_code == WM_XBUTTONDOWN)
1292 if (check_msg_filter( msg_code + (WM_LBUTTONDBLCLK - WM_LBUTTONDOWN), first, last )) return 1;
1293 if (check_msg_filter( msg_code + (WM_NCLBUTTONDBLCLK - WM_LBUTTONDOWN), first, last )) return 1;
1300 /* find a hardware message for the given queue */
1301 static int get_hardware_message( struct thread *thread, int hw_id, user_handle_t filter_win,
1302 unsigned int first, unsigned int last, struct get_message_reply *reply )
1304 struct thread_input *input = thread->queue->input;
1305 struct thread *win_thread;
1308 int clear_bits, got_one = 0;
1309 unsigned int msg_code;
1311 ptr = list_head( &input->msg_list );
1316 struct message *msg = LIST_ENTRY( ptr, struct message, entry );
1317 if (msg->unique_id == hw_id) break;
1318 ptr = list_next( &input->msg_list, ptr );
1320 if (!ptr) ptr = list_head( &input->msg_list );
1321 else ptr = list_next( &input->msg_list, ptr ); /* start from the next one */
1324 if (ptr == list_head( &input->msg_list ))
1325 clear_bits = QS_KEY | QS_MOUSEMOVE | QS_MOUSEBUTTON;
1327 clear_bits = 0; /* don't clear bits if we don't go through the whole list */
1331 struct message *msg = LIST_ENTRY( ptr, struct message, entry );
1332 ptr = list_next( &input->msg_list, ptr );
1333 win = find_hardware_message_window( input, msg, &msg_code );
1334 if (!win || !(win_thread = get_window_thread( win )))
1336 /* no window at all, remove it */
1337 update_input_key_state( input, msg );
1338 list_remove( &msg->entry );
1339 free_message( msg );
1342 if (win_thread != thread)
1344 if (win_thread->queue->input == input)
1346 /* wake the other thread */
1347 set_queue_bits( win_thread->queue, get_hardware_msg_bit(msg) );
1352 /* for another thread input, drop it */
1353 update_input_key_state( input, msg );
1354 list_remove( &msg->entry );
1355 free_message( msg );
1357 release_object( win_thread );
1360 release_object( win_thread );
1362 /* if we already got a message for another thread, or if it doesn't
1363 * match the filter we skip it */
1364 if (got_one || !check_hw_message_filter( win, msg_code, filter_win, first, last ))
1366 clear_bits &= ~get_hardware_msg_bit( msg );
1369 /* now we can return it */
1370 if (!msg->unique_id) msg->unique_id = get_unique_id();
1371 reply->type = MSG_HARDWARE;
1373 reply->msg = msg_code;
1374 reply->wparam = msg->wparam;
1375 reply->lparam = msg->lparam;
1378 reply->time = msg->time;
1379 reply->info = msg->info;
1380 reply->hw_id = msg->unique_id;
1383 /* nothing found, clear the hardware queue bits */
1384 clear_queue_bits( thread->queue, clear_bits );
1388 /* increment (or decrement if 'incr' is negative) the queue paint count */
1389 void inc_queue_paint_count( struct thread *thread, int incr )
1391 struct msg_queue *queue = thread->queue;
1395 if ((queue->paint_count += incr) < 0) queue->paint_count = 0;
1397 if (queue->paint_count)
1398 set_queue_bits( queue, QS_PAINT );
1400 clear_queue_bits( queue, QS_PAINT );
1404 /* remove all messages and timers belonging to a certain window */
1405 void queue_cleanup_window( struct thread *thread, user_handle_t win )
1407 struct msg_queue *queue = thread->queue;
1415 ptr = list_head( &queue->pending_timers );
1418 struct list *next = list_next( &queue->pending_timers, ptr );
1419 struct timer *timer = LIST_ENTRY( ptr, struct timer, entry );
1420 if (timer->win == win) free_timer( queue, timer );
1423 ptr = list_head( &queue->expired_timers );
1426 struct list *next = list_next( &queue->expired_timers, ptr );
1427 struct timer *timer = LIST_ENTRY( ptr, struct timer, entry );
1428 if (timer->win == win) free_timer( queue, timer );
1432 /* remove messages */
1433 for (i = 0; i < NB_MSG_KINDS; i++)
1435 struct list *ptr, *next;
1437 LIST_FOR_EACH_SAFE( ptr, next, &queue->msg_list[i] )
1439 struct message *msg = LIST_ENTRY( ptr, struct message, entry );
1440 if (msg->win == win) remove_queue_message( queue, msg, i );
1444 thread_input_cleanup_window( queue, win );
1447 /* post a message to a window; used by socket handling */
1448 void post_message( user_handle_t win, unsigned int message,
1449 unsigned long wparam, unsigned long lparam )
1451 struct message *msg;
1452 struct thread *thread = get_window_thread( win );
1454 if (!thread) return;
1456 if (thread->queue && (msg = mem_alloc( sizeof(*msg) )))
1458 msg->type = MSG_POSTED;
1459 msg->win = get_user_full_handle( win );
1461 msg->wparam = wparam;
1462 msg->lparam = lparam;
1463 msg->time = get_tick_count();
1468 msg->hook_proc = NULL;
1473 list_add_tail( &thread->queue->msg_list[POST_MESSAGE], &msg->entry );
1474 set_queue_bits( thread->queue, QS_POSTMESSAGE|QS_ALLPOSTMESSAGE );
1476 release_object( thread );
1479 /* post a win event */
1480 void post_win_event( struct thread *thread, unsigned int event,
1481 user_handle_t win, unsigned int object_id,
1482 unsigned int child_id, void *hook_proc,
1483 const WCHAR *module, size_t module_size,
1486 struct message *msg;
1488 if (thread->queue && (msg = mem_alloc( sizeof(*msg) )))
1490 msg->type = MSG_WINEVENT;
1491 msg->win = get_user_full_handle( win );
1493 msg->wparam = object_id;
1494 msg->lparam = child_id;
1495 msg->time = get_tick_count();
1498 msg->info = get_thread_id( current );
1501 msg->hook_proc = hook_proc;
1503 if ((msg->data = malloc( module_size )))
1505 msg->data_size = module_size;
1506 memcpy( msg->data, module, module_size );
1508 if (debug_level > 1)
1509 fprintf( stderr, "post_win_event: tid %04x event %04x win %p object_id %d child_id %d\n",
1510 get_thread_id(thread), event, win, object_id, child_id );
1511 list_add_tail( &thread->queue->msg_list[SEND_MESSAGE], &msg->entry );
1512 set_queue_bits( thread->queue, QS_SENDMESSAGE );
1519 /* get the message queue of the current thread */
1520 DECL_HANDLER(get_msg_queue)
1522 struct msg_queue *queue = get_current_queue();
1525 if (queue) reply->handle = alloc_handle( current->process, queue, SYNCHRONIZE, 0 );
1529 /* set the current message queue wakeup mask */
1530 DECL_HANDLER(set_queue_mask)
1532 struct msg_queue *queue = get_current_queue();
1536 queue->wake_mask = req->wake_mask;
1537 queue->changed_mask = req->changed_mask;
1538 reply->wake_bits = queue->wake_bits;
1539 reply->changed_bits = queue->changed_bits;
1540 if (is_signaled( queue ))
1542 /* if skip wait is set, do what would have been done in the subsequent wait */
1543 if (req->skip_wait) msg_queue_satisfied( &queue->obj, current );
1544 else wake_up( &queue->obj, 0 );
1550 /* get the current message queue status */
1551 DECL_HANDLER(get_queue_status)
1553 struct msg_queue *queue = current->queue;
1556 reply->wake_bits = queue->wake_bits;
1557 reply->changed_bits = queue->changed_bits;
1558 if (req->clear) queue->changed_bits = 0;
1560 else reply->wake_bits = reply->changed_bits = 0;
1564 /* send a message to a thread queue */
1565 DECL_HANDLER(send_message)
1567 struct message *msg;
1568 struct msg_queue *send_queue = get_current_queue();
1569 struct msg_queue *recv_queue = NULL;
1570 struct thread *thread = NULL;
1574 if (!(thread = get_thread_from_id( req->id ))) return;
1576 else if (req->type != MSG_HARDWARE)
1578 /* only hardware messages are allowed without destination thread */
1579 set_error( STATUS_INVALID_PARAMETER );
1583 if (thread && !(recv_queue = thread->queue))
1585 set_error( STATUS_INVALID_PARAMETER );
1586 release_object( thread );
1589 if (recv_queue && (req->flags & SEND_MSG_ABORT_IF_HUNG) && is_queue_hung(recv_queue))
1591 set_error( STATUS_TIMEOUT );
1592 release_object( thread );
1596 if ((msg = mem_alloc( sizeof(*msg) )))
1598 msg->type = req->type;
1599 msg->win = get_user_full_handle( req->win );
1600 msg->msg = req->msg;
1601 msg->wparam = req->wparam;
1602 msg->lparam = req->lparam;
1603 msg->time = req->time;
1606 msg->info = req->info;
1608 msg->hook_proc = NULL;
1615 case MSG_OTHER_PROCESS:
1616 msg->data_size = get_req_data_size();
1617 if (msg->data_size && !(msg->data = memdup( get_req_data(), msg->data_size )))
1626 if (!(msg->result = alloc_message_result( send_queue, recv_queue, msg,
1627 req->timeout, req->callback, req->info )))
1629 free_message( msg );
1634 list_add_tail( &recv_queue->msg_list[SEND_MESSAGE], &msg->entry );
1635 set_queue_bits( recv_queue, QS_SENDMESSAGE );
1638 /* needed for posted DDE messages */
1639 msg->data_size = get_req_data_size();
1640 if (msg->data_size && !(msg->data = memdup( get_req_data(), msg->data_size )))
1645 list_add_tail( &recv_queue->msg_list[POST_MESSAGE], &msg->entry );
1646 set_queue_bits( recv_queue, QS_POSTMESSAGE|QS_ALLPOSTMESSAGE );
1649 queue_hardware_message( recv_queue, msg );
1651 case MSG_CALLBACK_RESULT: /* cannot send this one */
1653 set_error( STATUS_INVALID_PARAMETER );
1658 if (thread) release_object( thread );
1661 /* post a quit message to the current queue */
1662 DECL_HANDLER(post_quit_message)
1664 struct msg_queue *queue = get_current_queue();
1669 queue->quit_message = 1;
1670 queue->exit_code = req->exit_code;
1671 set_queue_bits( queue, QS_POSTMESSAGE|QS_ALLPOSTMESSAGE );
1674 /* get a message from the current queue */
1675 DECL_HANDLER(get_message)
1677 struct timer *timer;
1679 struct msg_queue *queue = get_current_queue();
1680 user_handle_t get_win = get_user_full_handle( req->get_win );
1682 reply->active_hooks = get_active_hooks();
1685 gettimeofday( &queue->last_get_msg, NULL );
1687 /* first check for sent messages */
1688 if ((ptr = list_head( &queue->msg_list[SEND_MESSAGE] )))
1690 struct message *msg = LIST_ENTRY( ptr, struct message, entry );
1691 receive_message( queue, msg, reply );
1694 if (req->flags & GET_MSG_SENT_ONLY) goto done; /* nothing else to check */
1696 /* clear changed bits so we can wait on them if we don't find a message */
1697 if (req->get_first == 0 && req->get_last == ~0U) queue->changed_bits = 0;
1698 else queue->changed_bits &= QS_ALLPOSTMESSAGE;
1700 /* then check for posted messages */
1701 if (get_posted_message( queue, get_win, req->get_first, req->get_last, req->flags, reply ))
1704 /* only check for quit messages if not posted messages pending.
1705 * note: the quit message isn't filtered */
1706 if (get_quit_message( queue, req->flags, reply ))
1709 /* then check for any raw hardware message */
1710 if (filter_contains_hw_range( req->get_first, req->get_last ) &&
1711 get_hardware_message( current, req->hw_id, get_win, req->get_first, req->get_last, reply ))
1714 /* now check for WM_PAINT */
1715 if (queue->paint_count &&
1716 check_msg_filter( WM_PAINT, req->get_first, req->get_last ) &&
1717 (reply->win = find_window_to_repaint( get_win, current )))
1719 reply->type = MSG_POSTED;
1720 reply->msg = WM_PAINT;
1725 reply->time = get_tick_count();
1730 /* now check for timer */
1731 if ((timer = find_expired_timer( queue, get_win, req->get_first,
1732 req->get_last, (req->flags & GET_MSG_REMOVE) )))
1734 reply->type = MSG_POSTED;
1735 reply->win = timer->win;
1736 reply->msg = timer->msg;
1737 reply->wparam = timer->id;
1738 reply->lparam = timer->lparam;
1741 reply->time = get_tick_count();
1747 set_error( STATUS_PENDING ); /* FIXME */
1751 /* reply to a sent message */
1752 DECL_HANDLER(reply_message)
1754 if (!current->queue) set_error( STATUS_ACCESS_DENIED );
1755 else if (current->queue->recv_result)
1756 reply_message( current->queue, req->result, 0, req->remove,
1757 get_req_data(), get_req_data_size() );
1761 /* accept the current hardware message */
1762 DECL_HANDLER(accept_hardware_message)
1765 release_hardware_message( current->queue, req->hw_id, req->remove, req->new_win );
1767 set_error( STATUS_ACCESS_DENIED );
1771 /* retrieve the reply for the last message sent */
1772 DECL_HANDLER(get_message_reply)
1774 struct message_result *result;
1776 struct msg_queue *queue = current->queue;
1780 set_error( STATUS_PENDING );
1783 if (!(entry = list_head( &queue->send_result ))) return; /* no reply ready */
1785 result = LIST_ENTRY( entry, struct message_result, sender_entry );
1786 if (result->replied || req->cancel)
1788 if (result->replied)
1790 reply->result = result->result;
1791 set_error( result->error );
1794 size_t data_len = min( result->data_size, get_reply_max_size() );
1795 set_reply_data_ptr( result->data, data_len );
1796 result->data = NULL;
1797 result->data_size = 0;
1800 remove_result_from_sender( result );
1802 entry = list_head( &queue->send_result );
1803 if (!entry) clear_queue_bits( queue, QS_SMRESULT );
1806 result = LIST_ENTRY( entry, struct message_result, sender_entry );
1807 if (!result->replied) clear_queue_bits( queue, QS_SMRESULT );
1811 else set_error( STATUS_ACCESS_DENIED );
1815 /* set a window timer */
1816 DECL_HANDLER(set_win_timer)
1818 struct timer *timer;
1819 struct msg_queue *queue;
1820 struct thread *thread = NULL;
1821 user_handle_t win = 0;
1822 unsigned int id = req->id;
1826 if (!(win = get_user_full_handle( req->win )) || !(thread = get_window_thread( win )))
1828 set_error( STATUS_INVALID_HANDLE );
1831 if (thread->process != current->process)
1833 release_object( thread );
1834 set_error( STATUS_ACCESS_DENIED );
1837 queue = thread->queue;
1838 /* remove it if it existed already */
1839 if ((timer = find_timer( queue, win, req->msg, id ))) free_timer( queue, timer );
1843 queue = get_current_queue();
1844 /* find a free id for it */
1847 id = queue->next_timer_id;
1848 if (++queue->next_timer_id >= 0x10000) queue->next_timer_id = 1;
1850 while (find_timer( queue, 0, req->msg, id ));
1853 if ((timer = set_timer( queue, req->rate )))
1856 timer->msg = req->msg;
1858 timer->lparam = req->lparam;
1861 if (thread) release_object( thread );
1864 /* kill a window timer */
1865 DECL_HANDLER(kill_win_timer)
1867 struct timer *timer;
1868 struct thread *thread;
1869 user_handle_t win = 0;
1873 if (!(win = get_user_full_handle( req->win )) || !(thread = get_window_thread( win )))
1875 set_error( STATUS_INVALID_HANDLE );
1878 if (thread->process != current->process)
1880 release_object( thread );
1881 set_error( STATUS_ACCESS_DENIED );
1885 else thread = (struct thread *)grab_object( current );
1887 if (thread->queue && (timer = find_timer( thread->queue, win, req->msg, req->id )))
1888 free_timer( thread->queue, timer );
1890 set_error( STATUS_INVALID_PARAMETER );
1892 release_object( thread );
1896 /* attach (or detach) thread inputs */
1897 DECL_HANDLER(attach_thread_input)
1899 struct thread *thread_from = get_thread_from_id( req->tid_from );
1900 struct thread *thread_to = get_thread_from_id( req->tid_to );
1902 if (!thread_from || !thread_to)
1904 if (thread_from) release_object( thread_from );
1905 if (thread_to) release_object( thread_to );
1908 if (thread_from != thread_to)
1910 if (req->attach) attach_thread_input( thread_from, thread_to );
1913 if (thread_from->queue && thread_to->queue &&
1914 thread_from->queue->input == thread_to->queue->input)
1915 detach_thread_input( thread_from );
1917 set_error( STATUS_ACCESS_DENIED );
1920 else set_error( STATUS_ACCESS_DENIED );
1921 release_object( thread_from );
1922 release_object( thread_to );
1926 /* get thread input data */
1927 DECL_HANDLER(get_thread_input)
1929 struct thread *thread = NULL;
1930 struct thread_input *input;
1934 if (!(thread = get_thread_from_id( req->tid ))) return;
1935 input = thread->queue ? thread->queue->input : NULL;
1937 else input = foreground_input; /* get the foreground thread info */
1941 reply->focus = input->focus;
1942 reply->capture = input->capture;
1943 reply->active = input->active;
1944 reply->menu_owner = input->menu_owner;
1945 reply->move_size = input->move_size;
1946 reply->caret = input->caret;
1947 reply->rect = input->caret_rect;
1954 reply->menu_owner = 0;
1955 reply->move_size = 0;
1957 reply->rect.left = reply->rect.top = reply->rect.right = reply->rect.bottom = 0;
1959 /* foreground window is active window of foreground thread */
1960 reply->foreground = foreground_input ? foreground_input->active : 0;
1961 if (thread) release_object( thread );
1965 /* retrieve queue keyboard state for a given thread */
1966 DECL_HANDLER(get_key_state)
1968 struct thread *thread;
1969 struct thread_input *input;
1971 if (!(thread = get_thread_from_id( req->tid ))) return;
1972 input = thread->queue ? thread->queue->input : NULL;
1975 if (req->key >= 0) reply->state = input->keystate[req->key & 0xff];
1976 set_reply_data( input->keystate, min( get_reply_max_size(), sizeof(input->keystate) ));
1978 release_object( thread );
1982 /* set queue keyboard state for a given thread */
1983 DECL_HANDLER(set_key_state)
1985 struct thread *thread = NULL;
1986 struct thread_input *input;
1988 if (!(thread = get_thread_from_id( req->tid ))) return;
1989 input = thread->queue ? thread->queue->input : NULL;
1992 size_t size = min( sizeof(input->keystate), get_req_data_size() );
1993 if (size) memcpy( input->keystate, get_req_data(), size );
1995 release_object( thread );
1999 /* set the system foreground window */
2000 DECL_HANDLER(set_foreground_window)
2002 struct thread *thread;
2003 struct msg_queue *queue = get_current_queue();
2005 reply->previous = foreground_input ? foreground_input->active : 0;
2006 reply->send_msg_old = (reply->previous && foreground_input != queue->input);
2007 reply->send_msg_new = FALSE;
2009 if (is_top_level_window( req->handle ) &&
2010 ((thread = get_window_thread( req->handle ))))
2012 foreground_input = thread->queue->input;
2013 reply->send_msg_new = (foreground_input != queue->input);
2014 release_object( thread );
2016 else set_win32_error( ERROR_INVALID_WINDOW_HANDLE );
2020 /* set the current thread focus window */
2021 DECL_HANDLER(set_focus_window)
2023 struct msg_queue *queue = get_current_queue();
2025 reply->previous = 0;
2026 if (queue && check_queue_input_window( queue, req->handle ))
2028 reply->previous = queue->input->focus;
2029 queue->input->focus = get_user_full_handle( req->handle );
2034 /* set the current thread active window */
2035 DECL_HANDLER(set_active_window)
2037 struct msg_queue *queue = get_current_queue();
2039 reply->previous = 0;
2040 if (queue && check_queue_input_window( queue, req->handle ))
2042 if (!req->handle || make_window_active( req->handle ))
2044 reply->previous = queue->input->active;
2045 queue->input->active = get_user_full_handle( req->handle );
2047 else set_error( STATUS_INVALID_HANDLE );
2052 /* set the current thread capture window */
2053 DECL_HANDLER(set_capture_window)
2055 struct msg_queue *queue = get_current_queue();
2057 reply->previous = reply->full_handle = 0;
2058 if (queue && check_queue_input_window( queue, req->handle ))
2060 struct thread_input *input = queue->input;
2062 reply->previous = input->capture;
2063 input->capture = get_user_full_handle( req->handle );
2064 input->menu_owner = (req->flags & CAPTURE_MENU) ? input->capture : 0;
2065 input->move_size = (req->flags & CAPTURE_MOVESIZE) ? input->capture : 0;
2066 reply->full_handle = input->capture;
2071 /* Set the current thread caret window */
2072 DECL_HANDLER(set_caret_window)
2074 struct msg_queue *queue = get_current_queue();
2076 reply->previous = 0;
2077 if (queue && check_queue_input_window( queue, req->handle ))
2079 struct thread_input *input = queue->input;
2081 reply->previous = input->caret;
2082 reply->old_rect = input->caret_rect;
2083 reply->old_hide = input->caret_hide;
2084 reply->old_state = input->caret_state;
2086 set_caret_window( input, get_user_full_handle(req->handle) );
2087 input->caret_rect.right = input->caret_rect.left + req->width;
2088 input->caret_rect.bottom = input->caret_rect.top + req->height;
2093 /* Set the current thread caret information */
2094 DECL_HANDLER(set_caret_info)
2096 struct msg_queue *queue = get_current_queue();
2097 struct thread_input *input;
2100 input = queue->input;
2101 reply->full_handle = input->caret;
2102 reply->old_rect = input->caret_rect;
2103 reply->old_hide = input->caret_hide;
2104 reply->old_state = input->caret_state;
2106 if (req->handle && get_user_full_handle(req->handle) != input->caret)
2108 set_error( STATUS_ACCESS_DENIED );
2111 if (req->flags & SET_CARET_POS)
2113 input->caret_rect.right += req->x - input->caret_rect.left;
2114 input->caret_rect.bottom += req->y - input->caret_rect.top;
2115 input->caret_rect.left = req->x;
2116 input->caret_rect.top = req->y;
2118 if (req->flags & SET_CARET_HIDE)
2120 input->caret_hide += req->hide;
2121 if (input->caret_hide < 0) input->caret_hide = 0;
2123 if (req->flags & SET_CARET_STATE)
2125 if (req->state == -1) input->caret_state = !input->caret_state;
2126 else input->caret_state = !!req->state;
2131 /* get the time of the last input event */
2132 DECL_HANDLER(get_last_input_time)
2134 reply->time = last_input_time;