2 * Server-side message queues
4 * Copyright (C) 2000 Alexandre Julliard
20 enum message_kind
{ SEND_MESSAGE
, POST_MESSAGE
, COOKED_HW_MESSAGE
, RAW_HW_MESSAGE
};
21 #define NB_MSG_KINDS (RAW_HW_MESSAGE+1)
26 struct message_result
*send_next
; /* next in sender list */
27 struct message_result
*recv_next
; /* next in receiver list */
28 struct msg_queue
*sender
; /* sender queue */
29 struct msg_queue
*receiver
; /* receiver queue */
30 int replied
; /* has it been replied to? */
31 unsigned int result
; /* reply result */
32 unsigned int error
; /* error code to pass back to sender */
33 void *data
; /* message reply data */
34 unsigned int data_size
; /* size of message reply data */
35 struct timeout_user
*timeout
; /* result timeout */
40 struct message
*next
; /* next message in list */
41 struct message
*prev
; /* prev message in list */
42 enum message_type type
; /* message type */
43 handle_t win
; /* window handle */
44 unsigned int msg
; /* message code */
45 unsigned int wparam
; /* parameters */
46 unsigned int lparam
; /* parameters */
47 int x
; /* x position */
48 int y
; /* y position */
49 unsigned int time
; /* message time */
50 unsigned int info
; /* extra info */
51 void *data
; /* message data for sent messages */
52 unsigned int data_size
; /* size of message data */
53 struct message_result
*result
; /* result in sender queue */
58 struct message
*first
; /* head of list */
59 struct message
*last
; /* tail of list */
64 struct timer
*next
; /* next timer in list */
65 struct timer
*prev
; /* prev timer in list */
66 struct timeval when
; /* next expiration */
67 unsigned int rate
; /* timer rate in ms */
68 handle_t win
; /* window handle */
69 unsigned int msg
; /* message to post */
70 unsigned int id
; /* timer id */
71 unsigned int lparam
; /* lparam for message */
76 struct object obj
; /* object header */
77 unsigned int wake_bits
; /* wakeup bits */
78 unsigned int wake_mask
; /* wakeup mask */
79 unsigned int changed_bits
; /* changed wakeup bits */
80 unsigned int changed_mask
; /* changed wakeup mask */
81 int paint_count
; /* pending paint messages count */
82 struct message_list msg_list
[NB_MSG_KINDS
]; /* lists of messages */
83 struct message_result
*send_result
; /* stack of sent messages waiting for result */
84 struct message_result
*recv_result
; /* stack of received messages waiting for result */
85 struct message
*last_msg
; /* last msg returned to the app and not removed */
86 enum message_kind last_msg_kind
; /* message kind of last_msg */
87 struct timer
*first_timer
; /* head of timer list */
88 struct timer
*last_timer
; /* tail of timer list */
89 struct timer
*next_timer
; /* next timer to expire */
90 struct timeout_user
*timeout
; /* timeout for next timer to expire */
93 static void msg_queue_dump( struct object
*obj
, int verbose
);
94 static int msg_queue_add_queue( struct object
*obj
, struct wait_queue_entry
*entry
);
95 static void msg_queue_remove_queue( struct object
*obj
, struct wait_queue_entry
*entry
);
96 static int msg_queue_signaled( struct object
*obj
, struct thread
*thread
);
97 static int msg_queue_satisfied( struct object
*obj
, struct thread
*thread
);
98 static void msg_queue_destroy( struct object
*obj
);
99 static void timer_callback( void *private );
101 static const struct object_ops msg_queue_ops
=
103 sizeof(struct msg_queue
), /* size */
104 msg_queue_dump
, /* dump */
105 msg_queue_add_queue
, /* add_queue */
106 msg_queue_remove_queue
, /* remove_queue */
107 msg_queue_signaled
, /* signaled */
108 msg_queue_satisfied
, /* satisfied */
109 NULL
, /* get_poll_events */
110 NULL
, /* poll_event */
111 no_get_fd
, /* get_fd */
112 no_flush
, /* flush */
113 no_get_file_info
, /* get_file_info */
114 msg_queue_destroy
/* destroy */
118 static struct msg_queue
*create_msg_queue( struct thread
*thread
)
120 struct msg_queue
*queue
;
123 if ((queue
= alloc_object( &msg_queue_ops
, -1 )))
125 queue
->wake_bits
= 0;
126 queue
->wake_mask
= 0;
127 queue
->changed_bits
= 0;
128 queue
->changed_mask
= 0;
129 queue
->paint_count
= 0;
130 queue
->send_result
= NULL
;
131 queue
->recv_result
= NULL
;
132 queue
->last_msg
= NULL
;
133 queue
->first_timer
= NULL
;
134 queue
->last_timer
= NULL
;
135 queue
->next_timer
= NULL
;
136 queue
->timeout
= NULL
;
137 for (i
= 0; i
< NB_MSG_KINDS
; i
++)
138 queue
->msg_list
[i
].first
= queue
->msg_list
[i
].last
= NULL
;
140 thread
->queue
= queue
;
141 if (!thread
->process
->queue
)
142 thread
->process
->queue
= (struct msg_queue
*)grab_object( queue
);
147 /* check the queue status */
148 inline static int is_signaled( struct msg_queue
*queue
)
150 return ((queue
->wake_bits
& queue
->wake_mask
) || (queue
->changed_bits
& queue
->changed_mask
));
153 /* set some queue bits */
154 inline static void set_queue_bits( struct msg_queue
*queue
, unsigned int bits
)
156 queue
->wake_bits
|= bits
;
157 queue
->changed_bits
|= bits
;
158 if (is_signaled( queue
)) wake_up( &queue
->obj
, 0 );
161 /* clear some queue bits */
162 inline static void clear_queue_bits( struct msg_queue
*queue
, unsigned int bits
)
164 queue
->wake_bits
&= ~bits
;
165 queue
->changed_bits
&= ~bits
;
168 /* get the QS_* bit corresponding to a given hardware message */
169 inline static int get_hardware_msg_bit( struct message
*msg
)
171 if (msg
->msg
== WM_MOUSEMOVE
|| msg
->msg
== WM_NCMOUSEMOVE
) return QS_MOUSEMOVE
;
172 if (msg
->msg
>= WM_KEYFIRST
&& msg
->msg
<= WM_KEYLAST
) return QS_KEY
;
173 return QS_MOUSEBUTTON
;
176 /* get the current thread queue, creating it if needed */
177 inline struct msg_queue
*get_current_queue(void)
179 struct msg_queue
*queue
= current
->queue
;
180 if (!queue
) queue
= create_msg_queue( current
);
184 /* append a message to the end of a list */
185 inline static void append_message( struct message_list
*list
, struct message
*msg
)
188 if ((msg
->prev
= list
->last
)) msg
->prev
->next
= msg
;
189 else list
->first
= msg
;
193 /* unlink a message from a list it */
194 inline static void unlink_message( struct message_list
*list
, struct message
*msg
)
196 if (msg
->next
) msg
->next
->prev
= msg
->prev
;
197 else list
->last
= msg
->prev
;
198 if (msg
->prev
) msg
->prev
->next
= msg
->next
;
199 else list
->first
= msg
->next
;
202 /* try to merge a message with the last in the list; return 1 if successful */
203 static int merge_message( struct message_list
*list
, const struct message
*msg
)
205 struct message
*prev
= list
->last
;
208 if (prev
->result
) return 0;
209 if (prev
->win
!= msg
->win
) return 0;
210 if (prev
->msg
!= msg
->msg
) return 0;
211 if (prev
->type
!= msg
->type
) return 0;
212 /* now we can merge it */
213 prev
->wparam
= msg
->wparam
;
214 prev
->lparam
= msg
->lparam
;
217 prev
->time
= msg
->time
;
218 prev
->info
= msg
->info
;
222 /* free a result structure */
223 static void free_result( struct message_result
*result
)
225 if (result
->timeout
) remove_timeout_user( result
->timeout
);
226 if (result
->data
) free( result
->data
);
230 /* store the message result in the appropriate structure */
231 static void store_message_result( struct message_result
*res
, unsigned int result
,
234 res
->result
= result
;
239 remove_timeout_user( res
->timeout
);
242 /* wake sender queue if waiting on this result */
243 if (res
->sender
&& res
->sender
->send_result
== res
)
244 set_queue_bits( res
->sender
, QS_SMRESULT
);
247 /* free a message when deleting a queue or window */
248 static void free_message( struct message
*msg
)
250 struct message_result
*result
= msg
->result
;
255 result
->receiver
= NULL
;
256 store_message_result( result
, 0, STATUS_ACCESS_DENIED
/*FIXME*/ );
258 else free_result( result
);
260 if (msg
->data
) free( msg
->data
);
264 /* remove (and free) a message from a message list */
265 static void remove_queue_message( struct msg_queue
*queue
, struct message
*msg
,
266 enum message_kind kind
)
269 struct message
*other
;
271 if (queue
->last_msg
== msg
) queue
->last_msg
= NULL
;
272 unlink_message( &queue
->msg_list
[kind
], msg
);
276 if (!queue
->msg_list
[kind
].first
) clear_queue_bits( queue
, QS_SENDMESSAGE
);
279 if (!queue
->msg_list
[kind
].first
) clear_queue_bits( queue
, QS_POSTMESSAGE
);
281 case COOKED_HW_MESSAGE
:
283 clr_bit
= get_hardware_msg_bit( msg
);
284 for (other
= queue
->msg_list
[kind
].first
; other
; other
= other
->next
)
285 if (get_hardware_msg_bit( other
) == clr_bit
) break;
286 if (!other
) clear_queue_bits( queue
, clr_bit
);
292 /* message timed out without getting a reply */
293 static void result_timeout( void *private )
295 struct message_result
*result
= private;
297 assert( !result
->replied
);
299 result
->timeout
= NULL
;
300 store_message_result( result
, 0, STATUS_TIMEOUT
);
303 /* allocate and fill a message result structure */
304 static struct message_result
*alloc_message_result( struct msg_queue
*send_queue
,
305 struct msg_queue
*recv_queue
,
306 unsigned int timeout
)
308 struct message_result
*result
= mem_alloc( sizeof(*result
) );
311 /* put the result on the sender result stack */
312 result
->sender
= send_queue
;
313 result
->receiver
= recv_queue
;
316 result
->data_size
= 0;
317 result
->timeout
= NULL
;
318 result
->send_next
= send_queue
->send_result
;
319 send_queue
->send_result
= result
;
323 gettimeofday( &when
, 0 );
324 add_timeout( &when
, timeout
);
325 result
->timeout
= add_timeout_user( &when
, result_timeout
, result
);
331 /* receive a message, removing it from the sent queue */
332 static void receive_message( struct msg_queue
*queue
, struct message
*msg
)
334 struct message_result
*result
= msg
->result
;
336 unlink_message( &queue
->msg_list
[SEND_MESSAGE
], msg
);
337 /* put the result on the receiver result stack */
340 result
->recv_next
= queue
->recv_result
;
341 queue
->recv_result
= result
;
343 if (msg
->data
) free( msg
->data
);
345 if (!queue
->msg_list
[SEND_MESSAGE
].first
) clear_queue_bits( queue
, QS_SENDMESSAGE
);
348 /* set the result of the current received message */
349 static void reply_message( struct msg_queue
*queue
, unsigned int result
,
350 unsigned int error
, int remove
, void *data
, size_t len
)
352 struct message_result
*res
= queue
->recv_result
;
356 queue
->recv_result
= res
->recv_next
;
357 res
->receiver
= NULL
;
358 if (!res
->sender
) /* no one waiting for it */
366 if (len
&& (res
->data
= memdup( data
, len
))) res
->data_size
= len
;
367 store_message_result( res
, result
, error
);
371 /* empty a message list and free all the messages */
372 static void empty_msg_list( struct message_list
*list
)
374 struct message
*msg
= list
->first
;
377 struct message
*next
= msg
->next
;
383 /* cleanup all pending results when deleting a queue */
384 static void cleanup_results( struct msg_queue
*queue
)
386 struct message_result
*result
, *next
;
388 result
= queue
->send_result
;
391 next
= result
->send_next
;
392 result
->sender
= NULL
;
393 if (!result
->receiver
) free_result( result
);
397 while (queue
->recv_result
)
398 reply_message( queue
, 0, STATUS_ACCESS_DENIED
/*FIXME*/, 1, NULL
, 0 );
401 static int msg_queue_add_queue( struct object
*obj
, struct wait_queue_entry
*entry
)
403 struct msg_queue
*queue
= (struct msg_queue
*)obj
;
404 struct process
*process
= entry
->thread
->process
;
406 /* a thread can only wait on its own queue */
407 if (entry
->thread
->queue
!= queue
)
409 set_error( STATUS_ACCESS_DENIED
);
412 /* if waiting on the main process queue, set the idle event */
413 if (process
->queue
== queue
)
415 if (process
->idle_event
) set_event( process
->idle_event
);
417 add_queue( obj
, entry
);
421 static void msg_queue_remove_queue(struct object
*obj
, struct wait_queue_entry
*entry
)
423 struct msg_queue
*queue
= (struct msg_queue
*)obj
;
424 struct process
*process
= entry
->thread
->process
;
426 remove_queue( obj
, entry
);
428 assert( entry
->thread
->queue
== queue
);
430 /* if waiting on the main process queue, reset the idle event */
431 if (process
->queue
== queue
)
433 if (process
->idle_event
) reset_event( process
->idle_event
);
437 static void msg_queue_dump( struct object
*obj
, int verbose
)
439 struct msg_queue
*queue
= (struct msg_queue
*)obj
;
440 fprintf( stderr
, "Msg queue bits=%x mask=%x\n",
441 queue
->wake_bits
, queue
->wake_mask
);
444 static int msg_queue_signaled( struct object
*obj
, struct thread
*thread
)
446 struct msg_queue
*queue
= (struct msg_queue
*)obj
;
447 return is_signaled( queue
);
450 static int msg_queue_satisfied( struct object
*obj
, struct thread
*thread
)
452 struct msg_queue
*queue
= (struct msg_queue
*)obj
;
453 queue
->wake_mask
= 0;
454 queue
->changed_mask
= 0;
455 return 0; /* Not abandoned */
458 static void msg_queue_destroy( struct object
*obj
)
460 struct msg_queue
*queue
= (struct msg_queue
*)obj
;
461 struct timer
*timer
= queue
->first_timer
;
464 cleanup_results( queue
);
465 for (i
= 0; i
< NB_MSG_KINDS
; i
++) empty_msg_list( &queue
->msg_list
[i
] );
469 struct timer
*next
= timer
->next
;
473 if (queue
->timeout
) remove_timeout_user( queue
->timeout
);
476 /* set the next timer to expire */
477 static void set_next_timer( struct msg_queue
*queue
, struct timer
*timer
)
481 remove_timeout_user( queue
->timeout
);
482 queue
->timeout
= NULL
;
484 if ((queue
->next_timer
= timer
))
485 queue
->timeout
= add_timeout_user( &timer
->when
, timer_callback
, queue
);
487 /* set/clear QS_TIMER bit */
488 if (queue
->next_timer
== queue
->first_timer
)
489 clear_queue_bits( queue
, QS_TIMER
);
491 set_queue_bits( queue
, QS_TIMER
);
494 /* callback for the next timer expiration */
495 static void timer_callback( void *private )
497 struct msg_queue
*queue
= private;
499 queue
->timeout
= NULL
;
500 /* move on to the next timer */
501 set_next_timer( queue
, queue
->next_timer
->next
);
504 /* link a timer at its rightful place in the queue list */
505 static void link_timer( struct msg_queue
*queue
, struct timer
*timer
)
507 struct timer
*pos
= queue
->next_timer
;
509 while (pos
&& time_before( &pos
->when
, &timer
->when
)) pos
= pos
->next
;
511 if (pos
) /* insert before pos */
513 if ((timer
->prev
= pos
->prev
)) timer
->prev
->next
= timer
;
514 else queue
->first_timer
= timer
;
518 else /* insert at end */
521 timer
->prev
= queue
->last_timer
;
522 if (queue
->last_timer
) queue
->last_timer
->next
= timer
;
523 else queue
->first_timer
= timer
;
524 queue
->last_timer
= timer
;
526 /* check if we replaced the next timer */
527 if (pos
== queue
->next_timer
) set_next_timer( queue
, timer
);
530 /* remove a timer from the queue timer list */
531 static void unlink_timer( struct msg_queue
*queue
, struct timer
*timer
)
533 if (timer
->next
) timer
->next
->prev
= timer
->prev
;
534 else queue
->last_timer
= timer
->prev
;
535 if (timer
->prev
) timer
->prev
->next
= timer
->next
;
536 else queue
->first_timer
= timer
->next
;
537 /* check if we removed the next timer */
538 if (queue
->next_timer
== timer
) set_next_timer( queue
, timer
->next
);
539 else if (queue
->next_timer
== queue
->first_timer
) clear_queue_bits( queue
, QS_TIMER
);
542 /* restart an expired timer */
543 static void restart_timer( struct msg_queue
*queue
, struct timer
*timer
)
546 unlink_timer( queue
, timer
);
547 gettimeofday( &now
, 0 );
548 while (!time_before( &now
, &timer
->when
)) add_timeout( &timer
->when
, timer
->rate
);
549 link_timer( queue
, timer
);
552 /* find an expired timer matching the filtering parameters */
553 static struct timer
*find_expired_timer( struct msg_queue
*queue
, handle_t win
,
554 unsigned int get_first
, unsigned int get_last
,
558 for (timer
= queue
->first_timer
; (timer
&& timer
!= queue
->next_timer
); timer
= timer
->next
)
560 if (win
&& timer
->win
!= win
) continue;
561 if (timer
->msg
>= get_first
&& timer
->msg
<= get_last
)
563 if (remove
) restart_timer( queue
, timer
);
571 static int kill_timer( struct msg_queue
*queue
, handle_t win
, unsigned int msg
, unsigned int id
)
575 for (timer
= queue
->first_timer
; timer
; timer
= timer
->next
)
577 if (timer
->win
!= win
|| timer
->msg
!= msg
|| timer
->id
!= id
) continue;
578 unlink_timer( queue
, timer
);
586 static struct timer
*set_timer( struct msg_queue
*queue
, unsigned int rate
)
588 struct timer
*timer
= mem_alloc( sizeof(*timer
) );
592 gettimeofday( &timer
->when
, 0 );
593 add_timeout( &timer
->when
, rate
);
594 link_timer( queue
, timer
);
599 /* remove all messages and timers belonging to a certain window */
600 static void cleanup_window( struct msg_queue
*queue
, handle_t win
)
607 timer
= queue
->first_timer
;
610 struct timer
*next
= timer
->next
;
611 if (timer
->win
== win
)
613 unlink_timer( queue
, timer
);
619 /* remove messages */
620 for (i
= 0; i
< NB_MSG_KINDS
; i
++)
622 msg
= queue
->msg_list
[i
].first
;
625 struct message
*next
= msg
->next
;
626 if (msg
->win
== win
) remove_queue_message( queue
, msg
, i
);
632 /* get the message queue of the current thread */
633 DECL_HANDLER(get_msg_queue
)
635 struct msg_queue
*queue
= get_current_queue();
638 if (queue
) req
->handle
= alloc_handle( current
->process
, queue
, SYNCHRONIZE
, 0 );
642 /* increment the message queue paint count */
643 DECL_HANDLER(inc_queue_paint_count
)
645 struct msg_queue
*queue
;
646 struct thread
*thread
= get_thread_from_id( req
->id
);
650 if ((queue
= thread
->queue
))
652 if ((queue
->paint_count
+= req
->incr
) < 0) queue
->paint_count
= 0;
654 if (queue
->paint_count
)
655 set_queue_bits( queue
, QS_PAINT
);
657 clear_queue_bits( queue
, QS_PAINT
);
659 else set_error( STATUS_INVALID_PARAMETER
);
661 release_object( thread
);
666 /* set the current message queue wakeup mask */
667 DECL_HANDLER(set_queue_mask
)
669 struct msg_queue
*queue
= get_current_queue();
673 queue
->wake_mask
= req
->wake_mask
;
674 queue
->changed_mask
= req
->changed_mask
;
675 req
->wake_bits
= queue
->wake_bits
;
676 req
->changed_bits
= queue
->changed_bits
;
677 if (is_signaled( queue
))
679 /* if skip wait is set, do what would have been done in the subsequent wait */
680 if (req
->skip_wait
) msg_queue_satisfied( &queue
->obj
, current
);
681 else wake_up( &queue
->obj
, 0 );
687 /* get the current message queue status */
688 DECL_HANDLER(get_queue_status
)
690 struct msg_queue
*queue
= current
->queue
;
693 req
->wake_bits
= queue
->wake_bits
;
694 req
->changed_bits
= queue
->changed_bits
;
695 if (req
->clear
) queue
->changed_bits
= 0;
697 else req
->wake_bits
= req
->changed_bits
= 0;
701 /* send a message to a thread queue */
702 DECL_HANDLER(send_message
)
705 struct msg_queue
*send_queue
= get_current_queue();
706 struct msg_queue
*recv_queue
;
707 struct thread
*thread
= get_thread_from_id( req
->id
);
711 if (!(recv_queue
= thread
->queue
))
713 set_error( STATUS_INVALID_PARAMETER
);
714 release_object( thread
);
718 if ((msg
= mem_alloc( sizeof(*msg
) )))
720 msg
->type
= req
->type
;
723 msg
->wparam
= req
->wparam
;
724 msg
->lparam
= req
->lparam
;
725 msg
->time
= req
->time
;
728 msg
->info
= req
->info
;
735 case MSG_OTHER_PROCESS
:
736 msg
->data_size
= get_req_data_size(req
);
737 if (msg
->data_size
&& !(msg
->data
= memdup( get_req_data(req
), msg
->data_size
)))
746 if (!(msg
->result
= alloc_message_result( send_queue
, recv_queue
, req
->timeout
)))
753 append_message( &recv_queue
->msg_list
[SEND_MESSAGE
], msg
);
754 set_queue_bits( recv_queue
, QS_SENDMESSAGE
);
757 append_message( &recv_queue
->msg_list
[POST_MESSAGE
], msg
);
758 set_queue_bits( recv_queue
, QS_POSTMESSAGE
);
760 case MSG_HARDWARE_RAW
:
761 case MSG_HARDWARE_COOKED
:
763 struct message_list
*list
= ((msg
->type
== MSG_HARDWARE_RAW
) ?
764 &recv_queue
->msg_list
[RAW_HW_MESSAGE
] :
765 &recv_queue
->msg_list
[COOKED_HW_MESSAGE
]);
766 if (msg
->msg
== WM_MOUSEMOVE
&& merge_message( list
, msg
))
771 append_message( list
, msg
);
772 set_queue_bits( recv_queue
, get_hardware_msg_bit(msg
) );
776 set_error( STATUS_INVALID_PARAMETER
);
781 release_object( thread
);
784 /* store a message contents into the request buffer; helper for get_message */
785 inline static void put_req_message( struct get_message_request
*req
, const struct message
*msg
)
787 int len
= min( get_req_data_size(req
), msg
->data_size
);
789 req
->type
= msg
->type
;
792 req
->wparam
= msg
->wparam
;
793 req
->lparam
= msg
->lparam
;
796 req
->time
= msg
->time
;
797 req
->info
= msg
->info
;
798 if (len
) memcpy( get_req_data(req
), msg
->data
, len
);
799 set_req_data_size( req
, len
);
802 /* return a message to the application, removing it from the queue if needed */
803 static void return_message_to_app( struct msg_queue
*queue
, struct get_message_request
*req
,
804 struct message
*msg
, enum message_kind kind
)
806 put_req_message( req
, msg
);
807 /* raw messages always get removed */
808 if ((msg
->type
== MSG_HARDWARE_RAW
) || (req
->flags
& GET_MSG_REMOVE
))
810 queue
->last_msg
= NULL
;
811 remove_queue_message( queue
, msg
, kind
);
813 else /* remember it as the last returned message */
815 queue
->last_msg
= msg
;
816 queue
->last_msg_kind
= kind
;
821 inline static struct message
*find_matching_message( const struct message_list
*list
, handle_t win
,
822 unsigned int first
, unsigned int last
)
826 for (msg
= list
->first
; msg
; msg
= msg
->next
)
828 /* check against the filters */
829 if (msg
->msg
== WM_QUIT
) break; /* WM_QUIT is never filtered */
830 if (win
&& msg
->win
&& msg
->win
!= win
) continue;
831 if (msg
->msg
< first
) continue;
832 if (msg
->msg
> last
) continue;
833 break; /* found one */
839 /* get a message from the current queue */
840 DECL_HANDLER(get_message
)
844 struct msg_queue
*queue
= get_current_queue();
848 set_req_data_size( req
, 0 );
852 /* first check for sent messages */
853 if ((msg
= queue
->msg_list
[SEND_MESSAGE
].first
))
855 put_req_message( req
, msg
);
856 receive_message( queue
, msg
);
859 set_req_data_size( req
, 0 ); /* only sent messages can have data */
860 if (req
->flags
& GET_MSG_SENT_ONLY
) goto done
; /* nothing else to check */
862 /* if requested, remove the last returned but not yet removed message */
863 if ((req
->flags
& GET_MSG_REMOVE_LAST
) && queue
->last_msg
)
864 remove_queue_message( queue
, queue
->last_msg
, queue
->last_msg_kind
);
865 queue
->last_msg
= NULL
;
867 /* clear changed bits so we can wait on them if we don't find a message */
868 queue
->changed_bits
= 0;
870 /* then check for posted messages */
871 if ((msg
= find_matching_message( &queue
->msg_list
[POST_MESSAGE
], req
->get_win
,
872 req
->get_first
, req
->get_last
)))
874 return_message_to_app( queue
, req
, msg
, POST_MESSAGE
);
878 /* then check for cooked hardware messages */
879 if ((msg
= find_matching_message( &queue
->msg_list
[COOKED_HW_MESSAGE
], req
->get_win
,
880 req
->get_first
, req
->get_last
)))
882 return_message_to_app( queue
, req
, msg
, COOKED_HW_MESSAGE
);
886 /* then check for any raw hardware message */
887 if ((msg
= queue
->msg_list
[RAW_HW_MESSAGE
].first
))
889 return_message_to_app( queue
, req
, msg
, RAW_HW_MESSAGE
);
893 /* now check for WM_PAINT */
894 if ((queue
->wake_bits
& QS_PAINT
) &&
895 (WM_PAINT
>= req
->get_first
) && (WM_PAINT
<= req
->get_last
))
897 req
->type
= MSG_POSTED
;
909 /* now check for timer */
910 if ((timer
= find_expired_timer( queue
, req
->get_win
, req
->get_first
,
911 req
->get_last
, (req
->flags
& GET_MSG_REMOVE
) )))
913 req
->type
= MSG_POSTED
;
914 req
->win
= timer
->win
;
915 req
->msg
= timer
->msg
;
916 req
->wparam
= timer
->id
;
917 req
->lparam
= timer
->lparam
;
926 set_error( STATUS_PENDING
); /* FIXME */
930 /* reply to a sent message */
931 DECL_HANDLER(reply_message
)
933 if (current
->queue
&& current
->queue
->recv_result
)
934 reply_message( current
->queue
, req
->result
, 0, req
->remove
,
935 get_req_data(req
), get_req_data_size(req
) );
937 set_error( STATUS_ACCESS_DENIED
);
941 /* retrieve the reply for the last message sent */
942 DECL_HANDLER(get_message_reply
)
944 struct msg_queue
*queue
= current
->queue
;
949 struct message_result
*result
= queue
->send_result
;
951 set_error( STATUS_PENDING
);
954 if (result
&& (result
->replied
|| req
->cancel
))
958 req
->result
= result
->result
;
959 set_error( result
->error
);
962 data_len
= min( result
->data_size
, get_req_data_size(req
) );
963 memcpy( get_req_data(req
), result
->data
, data_len
);
964 free( result
->data
);
966 result
->data_size
= 0;
969 queue
->send_result
= result
->send_next
;
970 result
->sender
= NULL
;
971 if (!result
->receiver
) free_result( result
);
972 if (!queue
->send_result
|| !queue
->send_result
->replied
)
973 clear_queue_bits( queue
, QS_SMRESULT
);
976 else set_error( STATUS_ACCESS_DENIED
);
977 set_req_data_size( req
, data_len
);
981 /* cleanup a queue when a window is deleted */
982 DECL_HANDLER(cleanup_window_queue
)
984 if (current
->queue
) cleanup_window( current
->queue
, req
->win
);
988 /* set a window timer */
989 DECL_HANDLER(set_win_timer
)
992 struct msg_queue
*queue
= get_current_queue();
996 /* remove it if it existed already */
997 if (req
->win
) kill_timer( queue
, req
->win
, req
->msg
, req
->id
);
999 if ((timer
= set_timer( queue
, req
->rate
)))
1001 timer
->win
= req
->win
;
1002 timer
->msg
= req
->msg
;
1003 timer
->id
= req
->id
;
1004 timer
->lparam
= req
->lparam
;
1008 /* kill a window timer */
1009 DECL_HANDLER(kill_win_timer
)
1011 struct msg_queue
*queue
= current
->queue
;
1013 if (!queue
|| !kill_timer( queue
, req
->win
, req
->msg
, req
->id
))
1014 set_error( STATUS_INVALID_PARAMETER
);