2 * Server-side message queues
4 * Copyright (C) 2000 Alexandre Julliard
21 enum message_kind
{ SEND_MESSAGE
, POST_MESSAGE
, COOKED_HW_MESSAGE
, RAW_HW_MESSAGE
};
22 #define NB_MSG_KINDS (RAW_HW_MESSAGE+1)
27 struct message_result
*send_next
; /* next in sender list */
28 struct message_result
*recv_next
; /* next in receiver list */
29 struct msg_queue
*sender
; /* sender queue */
30 struct msg_queue
*receiver
; /* receiver queue */
31 int replied
; /* has it been replied to? */
32 unsigned int result
; /* reply result */
33 unsigned int error
; /* error code to pass back to sender */
34 void *data
; /* message reply data */
35 unsigned int data_size
; /* size of message reply data */
36 struct timeout_user
*timeout
; /* result timeout */
41 struct message
*next
; /* next message in list */
42 struct message
*prev
; /* prev message in list */
43 enum message_type type
; /* message type */
44 user_handle_t win
; /* window handle */
45 unsigned int msg
; /* message code */
46 unsigned int wparam
; /* parameters */
47 unsigned int lparam
; /* parameters */
48 int x
; /* x position */
49 int y
; /* y position */
50 unsigned int time
; /* message time */
51 unsigned int info
; /* extra info */
52 void *data
; /* message data for sent messages */
53 unsigned int data_size
; /* size of message data */
54 struct message_result
*result
; /* result in sender queue */
59 struct message
*first
; /* head of list */
60 struct message
*last
; /* tail of list */
65 struct timer
*next
; /* next timer in list */
66 struct timer
*prev
; /* prev timer in list */
67 struct timeval when
; /* next expiration */
68 unsigned int rate
; /* timer rate in ms */
69 user_handle_t win
; /* window handle */
70 unsigned int msg
; /* message to post */
71 unsigned int id
; /* timer id */
72 unsigned int lparam
; /* lparam for message */
77 struct object obj
; /* object header */
78 unsigned int wake_bits
; /* wakeup bits */
79 unsigned int wake_mask
; /* wakeup mask */
80 unsigned int changed_bits
; /* changed wakeup bits */
81 unsigned int changed_mask
; /* changed wakeup mask */
82 int paint_count
; /* pending paint messages count */
83 struct message_list msg_list
[NB_MSG_KINDS
]; /* lists of messages */
84 struct message_result
*send_result
; /* stack of sent messages waiting for result */
85 struct message_result
*recv_result
; /* stack of received messages waiting for result */
86 struct message
*last_msg
; /* last msg returned to the app and not removed */
87 enum message_kind last_msg_kind
; /* message kind of last_msg */
88 struct timer
*first_timer
; /* head of timer list */
89 struct timer
*last_timer
; /* tail of timer list */
90 struct timer
*next_timer
; /* next timer to expire */
91 struct timeout_user
*timeout
; /* timeout for next timer to expire */
94 static void msg_queue_dump( struct object
*obj
, int verbose
);
95 static int msg_queue_add_queue( struct object
*obj
, struct wait_queue_entry
*entry
);
96 static void msg_queue_remove_queue( struct object
*obj
, struct wait_queue_entry
*entry
);
97 static int msg_queue_signaled( struct object
*obj
, struct thread
*thread
);
98 static int msg_queue_satisfied( struct object
*obj
, struct thread
*thread
);
99 static void msg_queue_destroy( struct object
*obj
);
100 static void timer_callback( void *private );
102 static const struct object_ops msg_queue_ops
=
104 sizeof(struct msg_queue
), /* size */
105 msg_queue_dump
, /* dump */
106 msg_queue_add_queue
, /* add_queue */
107 msg_queue_remove_queue
, /* remove_queue */
108 msg_queue_signaled
, /* signaled */
109 msg_queue_satisfied
, /* satisfied */
110 NULL
, /* get_poll_events */
111 NULL
, /* poll_event */
112 no_get_fd
, /* get_fd */
113 no_flush
, /* flush */
114 no_get_file_info
, /* get_file_info */
115 msg_queue_destroy
/* destroy */
119 static struct msg_queue
*create_msg_queue( struct thread
*thread
)
121 struct msg_queue
*queue
;
124 if ((queue
= alloc_object( &msg_queue_ops
, -1 )))
126 queue
->wake_bits
= 0;
127 queue
->wake_mask
= 0;
128 queue
->changed_bits
= 0;
129 queue
->changed_mask
= 0;
130 queue
->paint_count
= 0;
131 queue
->send_result
= NULL
;
132 queue
->recv_result
= NULL
;
133 queue
->last_msg
= NULL
;
134 queue
->first_timer
= NULL
;
135 queue
->last_timer
= NULL
;
136 queue
->next_timer
= NULL
;
137 queue
->timeout
= NULL
;
138 for (i
= 0; i
< NB_MSG_KINDS
; i
++)
139 queue
->msg_list
[i
].first
= queue
->msg_list
[i
].last
= NULL
;
141 thread
->queue
= queue
;
142 if (!thread
->process
->queue
)
143 thread
->process
->queue
= (struct msg_queue
*)grab_object( queue
);
148 /* check the queue status */
149 inline static int is_signaled( struct msg_queue
*queue
)
151 return ((queue
->wake_bits
& queue
->wake_mask
) || (queue
->changed_bits
& queue
->changed_mask
));
154 /* set some queue bits */
155 inline static void set_queue_bits( struct msg_queue
*queue
, unsigned int bits
)
157 queue
->wake_bits
|= bits
;
158 queue
->changed_bits
|= bits
;
159 if (is_signaled( queue
)) wake_up( &queue
->obj
, 0 );
162 /* clear some queue bits */
163 inline static void clear_queue_bits( struct msg_queue
*queue
, unsigned int bits
)
165 queue
->wake_bits
&= ~bits
;
166 queue
->changed_bits
&= ~bits
;
169 /* get the QS_* bit corresponding to a given hardware message */
170 inline static int get_hardware_msg_bit( struct message
*msg
)
172 if (msg
->msg
== WM_MOUSEMOVE
|| msg
->msg
== WM_NCMOUSEMOVE
) return QS_MOUSEMOVE
;
173 if (msg
->msg
>= WM_KEYFIRST
&& msg
->msg
<= WM_KEYLAST
) return QS_KEY
;
174 return QS_MOUSEBUTTON
;
177 /* get the current thread queue, creating it if needed */
178 inline struct msg_queue
*get_current_queue(void)
180 struct msg_queue
*queue
= current
->queue
;
181 if (!queue
) queue
= create_msg_queue( current
);
185 /* append a message to the end of a list */
186 inline static void append_message( struct message_list
*list
, struct message
*msg
)
189 if ((msg
->prev
= list
->last
)) msg
->prev
->next
= msg
;
190 else list
->first
= msg
;
194 /* unlink a message from a list it */
195 inline static void unlink_message( struct message_list
*list
, struct message
*msg
)
197 if (msg
->next
) msg
->next
->prev
= msg
->prev
;
198 else list
->last
= msg
->prev
;
199 if (msg
->prev
) msg
->prev
->next
= msg
->next
;
200 else list
->first
= msg
->next
;
203 /* try to merge a message with the last in the list; return 1 if successful */
204 static int merge_message( struct message_list
*list
, const struct message
*msg
)
206 struct message
*prev
= list
->last
;
209 if (prev
->result
) return 0;
210 if (prev
->win
!= msg
->win
) return 0;
211 if (prev
->msg
!= msg
->msg
) return 0;
212 if (prev
->type
!= msg
->type
) return 0;
213 /* now we can merge it */
214 prev
->wparam
= msg
->wparam
;
215 prev
->lparam
= msg
->lparam
;
218 prev
->time
= msg
->time
;
219 prev
->info
= msg
->info
;
223 /* free a result structure */
224 static void free_result( struct message_result
*result
)
226 if (result
->timeout
) remove_timeout_user( result
->timeout
);
227 if (result
->data
) free( result
->data
);
231 /* store the message result in the appropriate structure */
232 static void store_message_result( struct message_result
*res
, unsigned int result
,
235 res
->result
= result
;
240 remove_timeout_user( res
->timeout
);
243 /* wake sender queue if waiting on this result */
244 if (res
->sender
&& res
->sender
->send_result
== res
)
245 set_queue_bits( res
->sender
, QS_SMRESULT
);
248 /* free a message when deleting a queue or window */
249 static void free_message( struct message
*msg
)
251 struct message_result
*result
= msg
->result
;
256 result
->receiver
= NULL
;
257 store_message_result( result
, 0, STATUS_ACCESS_DENIED
/*FIXME*/ );
259 else free_result( result
);
261 if (msg
->data
) free( msg
->data
);
265 /* remove (and free) a message from a message list */
266 static void remove_queue_message( struct msg_queue
*queue
, struct message
*msg
,
267 enum message_kind kind
)
270 struct message
*other
;
272 if (queue
->last_msg
== msg
) queue
->last_msg
= NULL
;
273 unlink_message( &queue
->msg_list
[kind
], msg
);
277 if (!queue
->msg_list
[kind
].first
) clear_queue_bits( queue
, QS_SENDMESSAGE
);
280 if (!queue
->msg_list
[kind
].first
) clear_queue_bits( queue
, QS_POSTMESSAGE
);
282 case COOKED_HW_MESSAGE
:
284 clr_bit
= get_hardware_msg_bit( msg
);
285 for (other
= queue
->msg_list
[kind
].first
; other
; other
= other
->next
)
286 if (get_hardware_msg_bit( other
) == clr_bit
) break;
287 if (!other
) clear_queue_bits( queue
, clr_bit
);
293 /* message timed out without getting a reply */
294 static void result_timeout( void *private )
296 struct message_result
*result
= private;
298 assert( !result
->replied
);
300 result
->timeout
= NULL
;
301 store_message_result( result
, 0, STATUS_TIMEOUT
);
304 /* allocate and fill a message result structure */
305 static struct message_result
*alloc_message_result( struct msg_queue
*send_queue
,
306 struct msg_queue
*recv_queue
,
307 unsigned int timeout
)
309 struct message_result
*result
= mem_alloc( sizeof(*result
) );
312 /* put the result on the sender result stack */
313 result
->sender
= send_queue
;
314 result
->receiver
= recv_queue
;
317 result
->data_size
= 0;
318 result
->timeout
= NULL
;
319 result
->send_next
= send_queue
->send_result
;
320 send_queue
->send_result
= result
;
324 gettimeofday( &when
, 0 );
325 add_timeout( &when
, timeout
);
326 result
->timeout
= add_timeout_user( &when
, result_timeout
, result
);
332 /* receive a message, removing it from the sent queue */
333 static void receive_message( struct msg_queue
*queue
, struct message
*msg
)
335 struct message_result
*result
= msg
->result
;
337 unlink_message( &queue
->msg_list
[SEND_MESSAGE
], msg
);
338 /* put the result on the receiver result stack */
341 result
->recv_next
= queue
->recv_result
;
342 queue
->recv_result
= result
;
344 if (msg
->data
) free( msg
->data
);
346 if (!queue
->msg_list
[SEND_MESSAGE
].first
) clear_queue_bits( queue
, QS_SENDMESSAGE
);
349 /* set the result of the current received message */
350 static void reply_message( struct msg_queue
*queue
, unsigned int result
,
351 unsigned int error
, int remove
, void *data
, size_t len
)
353 struct message_result
*res
= queue
->recv_result
;
357 queue
->recv_result
= res
->recv_next
;
358 res
->receiver
= NULL
;
359 if (!res
->sender
) /* no one waiting for it */
367 if (len
&& (res
->data
= memdup( data
, len
))) res
->data_size
= len
;
368 store_message_result( res
, result
, error
);
372 /* empty a message list and free all the messages */
373 static void empty_msg_list( struct message_list
*list
)
375 struct message
*msg
= list
->first
;
378 struct message
*next
= msg
->next
;
384 /* cleanup all pending results when deleting a queue */
385 static void cleanup_results( struct msg_queue
*queue
)
387 struct message_result
*result
, *next
;
389 result
= queue
->send_result
;
392 next
= result
->send_next
;
393 result
->sender
= NULL
;
394 if (!result
->receiver
) free_result( result
);
398 while (queue
->recv_result
)
399 reply_message( queue
, 0, STATUS_ACCESS_DENIED
/*FIXME*/, 1, NULL
, 0 );
402 static int msg_queue_add_queue( struct object
*obj
, struct wait_queue_entry
*entry
)
404 struct msg_queue
*queue
= (struct msg_queue
*)obj
;
405 struct process
*process
= entry
->thread
->process
;
407 /* a thread can only wait on its own queue */
408 if (entry
->thread
->queue
!= queue
)
410 set_error( STATUS_ACCESS_DENIED
);
413 /* if waiting on the main process queue, set the idle event */
414 if (process
->queue
== queue
)
416 if (process
->idle_event
) set_event( process
->idle_event
);
418 add_queue( obj
, entry
);
422 static void msg_queue_remove_queue(struct object
*obj
, struct wait_queue_entry
*entry
)
424 struct msg_queue
*queue
= (struct msg_queue
*)obj
;
425 struct process
*process
= entry
->thread
->process
;
427 remove_queue( obj
, entry
);
429 assert( entry
->thread
->queue
== queue
);
431 /* if waiting on the main process queue, reset the idle event */
432 if (process
->queue
== queue
)
434 if (process
->idle_event
) reset_event( process
->idle_event
);
438 static void msg_queue_dump( struct object
*obj
, int verbose
)
440 struct msg_queue
*queue
= (struct msg_queue
*)obj
;
441 fprintf( stderr
, "Msg queue bits=%x mask=%x\n",
442 queue
->wake_bits
, queue
->wake_mask
);
445 static int msg_queue_signaled( struct object
*obj
, struct thread
*thread
)
447 struct msg_queue
*queue
= (struct msg_queue
*)obj
;
448 return is_signaled( queue
);
451 static int msg_queue_satisfied( struct object
*obj
, struct thread
*thread
)
453 struct msg_queue
*queue
= (struct msg_queue
*)obj
;
454 queue
->wake_mask
= 0;
455 queue
->changed_mask
= 0;
456 return 0; /* Not abandoned */
459 static void msg_queue_destroy( struct object
*obj
)
461 struct msg_queue
*queue
= (struct msg_queue
*)obj
;
462 struct timer
*timer
= queue
->first_timer
;
465 cleanup_results( queue
);
466 for (i
= 0; i
< NB_MSG_KINDS
; i
++) empty_msg_list( &queue
->msg_list
[i
] );
470 struct timer
*next
= timer
->next
;
474 if (queue
->timeout
) remove_timeout_user( queue
->timeout
);
477 /* set the next timer to expire */
478 static void set_next_timer( struct msg_queue
*queue
, struct timer
*timer
)
482 remove_timeout_user( queue
->timeout
);
483 queue
->timeout
= NULL
;
485 if ((queue
->next_timer
= timer
))
486 queue
->timeout
= add_timeout_user( &timer
->when
, timer_callback
, queue
);
488 /* set/clear QS_TIMER bit */
489 if (queue
->next_timer
== queue
->first_timer
)
490 clear_queue_bits( queue
, QS_TIMER
);
492 set_queue_bits( queue
, QS_TIMER
);
495 /* callback for the next timer expiration */
496 static void timer_callback( void *private )
498 struct msg_queue
*queue
= private;
500 queue
->timeout
= NULL
;
501 /* move on to the next timer */
502 set_next_timer( queue
, queue
->next_timer
->next
);
505 /* link a timer at its rightful place in the queue list */
506 static void link_timer( struct msg_queue
*queue
, struct timer
*timer
)
508 struct timer
*pos
= queue
->next_timer
;
510 while (pos
&& time_before( &pos
->when
, &timer
->when
)) pos
= pos
->next
;
512 if (pos
) /* insert before pos */
514 if ((timer
->prev
= pos
->prev
)) timer
->prev
->next
= timer
;
515 else queue
->first_timer
= timer
;
519 else /* insert at end */
522 timer
->prev
= queue
->last_timer
;
523 if (queue
->last_timer
) queue
->last_timer
->next
= timer
;
524 else queue
->first_timer
= timer
;
525 queue
->last_timer
= timer
;
527 /* check if we replaced the next timer */
528 if (pos
== queue
->next_timer
) set_next_timer( queue
, timer
);
531 /* remove a timer from the queue timer list */
532 static void unlink_timer( struct msg_queue
*queue
, struct timer
*timer
)
534 if (timer
->next
) timer
->next
->prev
= timer
->prev
;
535 else queue
->last_timer
= timer
->prev
;
536 if (timer
->prev
) timer
->prev
->next
= timer
->next
;
537 else queue
->first_timer
= timer
->next
;
538 /* check if we removed the next timer */
539 if (queue
->next_timer
== timer
) set_next_timer( queue
, timer
->next
);
540 else if (queue
->next_timer
== queue
->first_timer
) clear_queue_bits( queue
, QS_TIMER
);
543 /* restart an expired timer */
544 static void restart_timer( struct msg_queue
*queue
, struct timer
*timer
)
547 unlink_timer( queue
, timer
);
548 gettimeofday( &now
, 0 );
549 while (!time_before( &now
, &timer
->when
)) add_timeout( &timer
->when
, timer
->rate
);
550 link_timer( queue
, timer
);
553 /* find an expired timer matching the filtering parameters */
554 static struct timer
*find_expired_timer( struct msg_queue
*queue
, user_handle_t win
,
555 unsigned int get_first
, unsigned int get_last
,
559 for (timer
= queue
->first_timer
; (timer
&& timer
!= queue
->next_timer
); timer
= timer
->next
)
561 if (win
&& timer
->win
!= win
) continue;
562 if (timer
->msg
>= get_first
&& timer
->msg
<= get_last
)
564 if (remove
) restart_timer( queue
, timer
);
572 static int kill_timer( struct msg_queue
*queue
, user_handle_t win
,
573 unsigned int msg
, unsigned int id
)
577 for (timer
= queue
->first_timer
; timer
; timer
= timer
->next
)
579 if (timer
->win
!= win
|| timer
->msg
!= msg
|| timer
->id
!= id
) continue;
580 unlink_timer( queue
, timer
);
588 static struct timer
*set_timer( struct msg_queue
*queue
, unsigned int rate
)
590 struct timer
*timer
= mem_alloc( sizeof(*timer
) );
594 gettimeofday( &timer
->when
, 0 );
595 add_timeout( &timer
->when
, rate
);
596 link_timer( queue
, timer
);
601 /* remove all messages and timers belonging to a certain window */
602 void queue_cleanup_window( struct thread
*thread
, user_handle_t win
)
604 struct msg_queue
*queue
= thread
->queue
;
612 timer
= queue
->first_timer
;
615 struct timer
*next
= timer
->next
;
616 if (timer
->win
== win
)
618 unlink_timer( queue
, timer
);
624 /* remove messages */
625 for (i
= 0; i
< NB_MSG_KINDS
; i
++)
627 msg
= queue
->msg_list
[i
].first
;
630 struct message
*next
= msg
->next
;
631 if (msg
->win
== win
) remove_queue_message( queue
, msg
, i
);
637 /* get the message queue of the current thread */
638 DECL_HANDLER(get_msg_queue
)
640 struct msg_queue
*queue
= get_current_queue();
643 if (queue
) req
->handle
= alloc_handle( current
->process
, queue
, SYNCHRONIZE
, 0 );
647 /* increment the message queue paint count */
648 DECL_HANDLER(inc_queue_paint_count
)
650 struct msg_queue
*queue
;
651 struct thread
*thread
= get_thread_from_id( req
->id
);
655 if ((queue
= thread
->queue
))
657 if ((queue
->paint_count
+= req
->incr
) < 0) queue
->paint_count
= 0;
659 if (queue
->paint_count
)
660 set_queue_bits( queue
, QS_PAINT
);
662 clear_queue_bits( queue
, QS_PAINT
);
664 else set_error( STATUS_INVALID_PARAMETER
);
666 release_object( thread
);
671 /* set the current message queue wakeup mask */
672 DECL_HANDLER(set_queue_mask
)
674 struct msg_queue
*queue
= get_current_queue();
678 queue
->wake_mask
= req
->wake_mask
;
679 queue
->changed_mask
= req
->changed_mask
;
680 req
->wake_bits
= queue
->wake_bits
;
681 req
->changed_bits
= queue
->changed_bits
;
682 if (is_signaled( queue
))
684 /* if skip wait is set, do what would have been done in the subsequent wait */
685 if (req
->skip_wait
) msg_queue_satisfied( &queue
->obj
, current
);
686 else wake_up( &queue
->obj
, 0 );
692 /* get the current message queue status */
693 DECL_HANDLER(get_queue_status
)
695 struct msg_queue
*queue
= current
->queue
;
698 req
->wake_bits
= queue
->wake_bits
;
699 req
->changed_bits
= queue
->changed_bits
;
700 if (req
->clear
) queue
->changed_bits
= 0;
702 else req
->wake_bits
= req
->changed_bits
= 0;
706 /* send a message to a thread queue */
707 DECL_HANDLER(send_message
)
710 struct msg_queue
*send_queue
= get_current_queue();
711 struct msg_queue
*recv_queue
;
712 struct thread
*thread
= get_thread_from_id( req
->id
);
716 if (!(recv_queue
= thread
->queue
))
718 set_error( STATUS_INVALID_PARAMETER
);
719 release_object( thread
);
723 if ((msg
= mem_alloc( sizeof(*msg
) )))
725 msg
->type
= req
->type
;
726 msg
->win
= get_user_full_handle( req
->win
);
728 msg
->wparam
= req
->wparam
;
729 msg
->lparam
= req
->lparam
;
730 msg
->time
= req
->time
;
733 msg
->info
= req
->info
;
740 case MSG_OTHER_PROCESS
:
741 msg
->data_size
= get_req_data_size(req
);
742 if (msg
->data_size
&& !(msg
->data
= memdup( get_req_data(req
), msg
->data_size
)))
751 if (!(msg
->result
= alloc_message_result( send_queue
, recv_queue
, req
->timeout
)))
758 append_message( &recv_queue
->msg_list
[SEND_MESSAGE
], msg
);
759 set_queue_bits( recv_queue
, QS_SENDMESSAGE
);
762 append_message( &recv_queue
->msg_list
[POST_MESSAGE
], msg
);
763 set_queue_bits( recv_queue
, QS_POSTMESSAGE
);
765 case MSG_HARDWARE_RAW
:
766 case MSG_HARDWARE_COOKED
:
768 struct message_list
*list
= ((msg
->type
== MSG_HARDWARE_RAW
) ?
769 &recv_queue
->msg_list
[RAW_HW_MESSAGE
] :
770 &recv_queue
->msg_list
[COOKED_HW_MESSAGE
]);
771 if (msg
->msg
== WM_MOUSEMOVE
&& merge_message( list
, msg
))
776 append_message( list
, msg
);
777 set_queue_bits( recv_queue
, get_hardware_msg_bit(msg
) );
781 set_error( STATUS_INVALID_PARAMETER
);
786 release_object( thread
);
789 /* store a message contents into the request buffer; helper for get_message */
790 inline static void put_req_message( struct get_message_request
*req
, const struct message
*msg
)
792 int len
= min( get_req_data_size(req
), msg
->data_size
);
794 req
->type
= msg
->type
;
797 req
->wparam
= msg
->wparam
;
798 req
->lparam
= msg
->lparam
;
801 req
->time
= msg
->time
;
802 req
->info
= msg
->info
;
803 if (len
) memcpy( get_req_data(req
), msg
->data
, len
);
804 set_req_data_size( req
, len
);
807 /* return a message to the application, removing it from the queue if needed */
808 static void return_message_to_app( struct msg_queue
*queue
, struct get_message_request
*req
,
809 struct message
*msg
, enum message_kind kind
)
811 put_req_message( req
, msg
);
812 /* raw messages always get removed */
813 if ((msg
->type
== MSG_HARDWARE_RAW
) || (req
->flags
& GET_MSG_REMOVE
))
815 queue
->last_msg
= NULL
;
816 remove_queue_message( queue
, msg
, kind
);
818 else /* remember it as the last returned message */
820 queue
->last_msg
= msg
;
821 queue
->last_msg_kind
= kind
;
826 inline static struct message
*find_matching_message( const struct message_list
*list
,
828 unsigned int first
, unsigned int last
)
832 for (msg
= list
->first
; msg
; msg
= msg
->next
)
834 /* check against the filters */
835 if (msg
->msg
== WM_QUIT
) break; /* WM_QUIT is never filtered */
836 if (win
&& msg
->win
&& msg
->win
!= win
&& !is_child_window( win
, msg
->win
)) continue;
837 if (msg
->msg
< first
) continue;
838 if (msg
->msg
> last
) continue;
839 break; /* found one */
845 /* get a message from the current queue */
846 DECL_HANDLER(get_message
)
850 struct msg_queue
*queue
= get_current_queue();
851 user_handle_t get_win
= get_user_full_handle( req
->get_win
);
855 set_req_data_size( req
, 0 );
859 /* first check for sent messages */
860 if ((msg
= queue
->msg_list
[SEND_MESSAGE
].first
))
862 put_req_message( req
, msg
);
863 receive_message( queue
, msg
);
866 set_req_data_size( req
, 0 ); /* only sent messages can have data */
867 if (req
->flags
& GET_MSG_SENT_ONLY
) goto done
; /* nothing else to check */
869 /* if requested, remove the last returned but not yet removed message */
870 if ((req
->flags
& GET_MSG_REMOVE_LAST
) && queue
->last_msg
)
871 remove_queue_message( queue
, queue
->last_msg
, queue
->last_msg_kind
);
872 queue
->last_msg
= NULL
;
874 /* clear changed bits so we can wait on them if we don't find a message */
875 queue
->changed_bits
= 0;
877 /* then check for posted messages */
878 if ((msg
= find_matching_message( &queue
->msg_list
[POST_MESSAGE
], get_win
,
879 req
->get_first
, req
->get_last
)))
881 return_message_to_app( queue
, req
, msg
, POST_MESSAGE
);
885 /* then check for cooked hardware messages */
886 if ((msg
= find_matching_message( &queue
->msg_list
[COOKED_HW_MESSAGE
], get_win
,
887 req
->get_first
, req
->get_last
)))
889 return_message_to_app( queue
, req
, msg
, COOKED_HW_MESSAGE
);
893 /* then check for any raw hardware message */
894 if ((msg
= queue
->msg_list
[RAW_HW_MESSAGE
].first
))
896 return_message_to_app( queue
, req
, msg
, RAW_HW_MESSAGE
);
900 /* now check for WM_PAINT */
901 if ((queue
->wake_bits
& QS_PAINT
) &&
902 (WM_PAINT
>= req
->get_first
) && (WM_PAINT
<= req
->get_last
))
904 req
->type
= MSG_POSTED
;
916 /* now check for timer */
917 if ((timer
= find_expired_timer( queue
, get_win
, req
->get_first
,
918 req
->get_last
, (req
->flags
& GET_MSG_REMOVE
) )))
920 req
->type
= MSG_POSTED
;
921 req
->win
= timer
->win
;
922 req
->msg
= timer
->msg
;
923 req
->wparam
= timer
->id
;
924 req
->lparam
= timer
->lparam
;
933 set_error( STATUS_PENDING
); /* FIXME */
937 /* reply to a sent message */
938 DECL_HANDLER(reply_message
)
940 if (current
->queue
&& current
->queue
->recv_result
)
941 reply_message( current
->queue
, req
->result
, 0, req
->remove
,
942 get_req_data(req
), get_req_data_size(req
) );
944 set_error( STATUS_ACCESS_DENIED
);
948 /* retrieve the reply for the last message sent */
949 DECL_HANDLER(get_message_reply
)
951 struct msg_queue
*queue
= current
->queue
;
956 struct message_result
*result
= queue
->send_result
;
958 set_error( STATUS_PENDING
);
961 if (result
&& (result
->replied
|| req
->cancel
))
965 req
->result
= result
->result
;
966 set_error( result
->error
);
969 data_len
= min( result
->data_size
, get_req_data_size(req
) );
970 memcpy( get_req_data(req
), result
->data
, data_len
);
971 free( result
->data
);
973 result
->data_size
= 0;
976 queue
->send_result
= result
->send_next
;
977 result
->sender
= NULL
;
978 if (!result
->receiver
) free_result( result
);
979 if (!queue
->send_result
|| !queue
->send_result
->replied
)
980 clear_queue_bits( queue
, QS_SMRESULT
);
983 else set_error( STATUS_ACCESS_DENIED
);
984 set_req_data_size( req
, data_len
);
988 /* cleanup a queue when a window is deleted */
989 DECL_HANDLER(cleanup_window_queue
)
991 queue_cleanup_window( current
, get_user_full_handle(req
->win
) );
995 /* set a window timer */
996 DECL_HANDLER(set_win_timer
)
999 struct msg_queue
*queue
= get_current_queue();
1000 user_handle_t win
= get_user_full_handle( req
->win
);
1004 /* remove it if it existed already */
1005 if (win
) kill_timer( queue
, win
, req
->msg
, req
->id
);
1007 if ((timer
= set_timer( queue
, req
->rate
)))
1010 timer
->msg
= req
->msg
;
1011 timer
->id
= req
->id
;
1012 timer
->lparam
= req
->lparam
;
1016 /* kill a window timer */
1017 DECL_HANDLER(kill_win_timer
)
1019 struct msg_queue
*queue
= current
->queue
;
1021 if (!queue
|| !kill_timer( queue
, get_user_full_handle(req
->win
), req
->msg
, req
->id
))
1022 set_error( STATUS_INVALID_PARAMETER
);