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wine/server/queue.c
Alexandre Julliard 3e2f2a5265 Allow nested hardware message processing by storing a unique id in 
every message and using it to manage the current queue position.
Better filtering of hardware messages to avoid returning messages that
have no chance to match the filter.
2005-04-20 13:03:59 +00:00

2000 lines
62 KiB
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/*
* Server-side message queues
*
* Copyright (C) 2000 Alexandre Julliard
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include "config.h"
#include "wine/port.h"
#include <assert.h>
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include "windef.h"
#include "winbase.h"
#include "wingdi.h"
#include "winuser.h"
#include "handle.h"
#include "file.h"
#include "thread.h"
#include "process.h"
#include "request.h"
#include "user.h"
#define WM_NCMOUSEFIRST WM_NCMOUSEMOVE
#define WM_NCMOUSELAST (WM_NCMOUSEFIRST+(WM_MOUSELAST-WM_MOUSEFIRST))
enum message_kind { SEND_MESSAGE, POST_MESSAGE };
#define NB_MSG_KINDS (POST_MESSAGE+1)
struct message_result
{
struct list sender_entry; /* entry in sender list */
struct message_result *recv_next; /* next in receiver list */
struct msg_queue *sender; /* sender queue */
struct msg_queue *receiver; /* receiver queue */
int replied; /* has it been replied to? */
unsigned int result; /* reply result */
unsigned int error; /* error code to pass back to sender */
struct message *callback_msg; /* message to queue for callback */
void *data; /* message reply data */
unsigned int data_size; /* size of message reply data */
struct timeout_user *timeout; /* result timeout */
};
struct message
{
struct list entry; /* entry in message list */
enum message_type type; /* message type */
user_handle_t win; /* window handle */
unsigned int msg; /* message code */
unsigned int wparam; /* parameters */
unsigned int lparam; /* parameters */
int x; /* x position */
int y; /* y position */
unsigned int time; /* message time */
unsigned int info; /* extra info */
user_handle_t hook; /* winevent hook handle */
void *hook_proc; /* winevent hook proc address */
void *data; /* message data for sent messages */
unsigned int data_size; /* size of message data */
unsigned int unique_id; /* unique id for nested hw message waits */
struct message_result *result; /* result in sender queue */
};
struct timer
{
struct list entry; /* entry in timer list */
struct timeval when; /* next expiration */
unsigned int rate; /* timer rate in ms */
user_handle_t win; /* window handle */
unsigned int msg; /* message to post */
unsigned int id; /* timer id */
unsigned int lparam; /* lparam for message */
};
struct thread_input
{
struct object obj; /* object header */
user_handle_t focus; /* focus window */
user_handle_t capture; /* capture window */
user_handle_t active; /* active window */
user_handle_t menu_owner; /* current menu owner window */
user_handle_t move_size; /* current moving/resizing window */
user_handle_t caret; /* caret window */
rectangle_t caret_rect; /* caret rectangle */
int caret_hide; /* caret hide count */
int caret_state; /* caret on/off state */
struct list msg_list; /* list of hardware messages */
unsigned char keystate[256]; /* state of each key */
};
struct msg_queue
{
struct object obj; /* object header */
unsigned int wake_bits; /* wakeup bits */
unsigned int wake_mask; /* wakeup mask */
unsigned int changed_bits; /* changed wakeup bits */
unsigned int changed_mask; /* changed wakeup mask */
int paint_count; /* pending paint messages count */
struct list msg_list[NB_MSG_KINDS]; /* lists of messages */
struct list send_result; /* stack of sent messages waiting for result */
struct list callback_result; /* list of callback messages waiting for result */
struct message_result *recv_result; /* stack of received messages waiting for result */
struct list pending_timers; /* list of pending timers */
struct list expired_timers; /* list of expired timers */
unsigned int next_timer_id; /* id for the next timer with a 0 window */
struct timeout_user *timeout; /* timeout for next timer to expire */
struct thread_input *input; /* thread input descriptor */
struct hook_table *hooks; /* hook table */
struct timeval last_get_msg; /* time of last get message call */
};
static void msg_queue_dump( struct object *obj, int verbose );
static int msg_queue_add_queue( struct object *obj, struct wait_queue_entry *entry );
static void msg_queue_remove_queue( struct object *obj, struct wait_queue_entry *entry );
static int msg_queue_signaled( struct object *obj, struct thread *thread );
static int msg_queue_satisfied( struct object *obj, struct thread *thread );
static void msg_queue_destroy( struct object *obj );
static void thread_input_dump( struct object *obj, int verbose );
static void thread_input_destroy( struct object *obj );
static void timer_callback( void *private );
static const struct object_ops msg_queue_ops =
{
sizeof(struct msg_queue), /* size */
msg_queue_dump, /* dump */
msg_queue_add_queue, /* add_queue */
msg_queue_remove_queue, /* remove_queue */
msg_queue_signaled, /* signaled */
msg_queue_satisfied, /* satisfied */
no_get_fd, /* get_fd */
msg_queue_destroy /* destroy */
};
static const struct object_ops thread_input_ops =
{
sizeof(struct thread_input), /* size */
thread_input_dump, /* dump */
no_add_queue, /* add_queue */
NULL, /* remove_queue */
NULL, /* signaled */
NULL, /* satisfied */
no_get_fd, /* get_fd */
thread_input_destroy /* destroy */
};
/* pointer to input structure of foreground thread */
static struct thread_input *foreground_input;
/* set the caret window in a given thread input */
static void set_caret_window( struct thread_input *input, user_handle_t win )
{
if (!win || win != input->caret)
{
input->caret_rect.left = 0;
input->caret_rect.top = 0;
input->caret_rect.right = 0;
input->caret_rect.bottom = 0;
}
input->caret = win;
input->caret_hide = 1;
input->caret_state = 0;
}
/* create a thread input object */
static struct thread_input *create_thread_input(void)
{
struct thread_input *input;
if ((input = alloc_object( &thread_input_ops )))
{
input->focus = 0;
input->capture = 0;
input->active = 0;
input->menu_owner = 0;
input->move_size = 0;
list_init( &input->msg_list );
set_caret_window( input, 0 );
memset( input->keystate, 0, sizeof(input->keystate) );
}
return input;
}
/* release the thread input data of a given thread */
static inline void release_thread_input( struct thread *thread )
{
struct thread_input *input = thread->queue->input;
if (!input) return;
release_object( input );
thread->queue->input = NULL;
}
/* create a message queue object */
static struct msg_queue *create_msg_queue( struct thread *thread, struct thread_input *input )
{
struct msg_queue *queue;
int i;
if (!input && !(input = create_thread_input())) return NULL;
if ((queue = alloc_object( &msg_queue_ops )))
{
queue->wake_bits = 0;
queue->wake_mask = 0;
queue->changed_bits = 0;
queue->changed_mask = 0;
queue->paint_count = 0;
queue->recv_result = NULL;
queue->next_timer_id = 1;
queue->timeout = NULL;
queue->input = (struct thread_input *)grab_object( input );
queue->hooks = NULL;
gettimeofday( &queue->last_get_msg, NULL );
list_init( &queue->send_result );
list_init( &queue->callback_result );
list_init( &queue->pending_timers );
list_init( &queue->expired_timers );
for (i = 0; i < NB_MSG_KINDS; i++) list_init( &queue->msg_list[i] );
thread->queue = queue;
if (!thread->process->queue)
thread->process->queue = (struct msg_queue *)grab_object( queue );
}
release_object( input );
return queue;
}
/* free the message queue of a thread at thread exit */
void free_msg_queue( struct thread *thread )
{
struct process *process = thread->process;
struct thread_input *input;
remove_thread_hooks( thread );
if (!thread->queue) return;
if (process->queue == thread->queue) /* is it the process main queue? */
{
release_object( process->queue );
process->queue = NULL;
if (process->idle_event)
{
set_event( process->idle_event );
release_object( process->idle_event );
process->idle_event = NULL;
}
}
input = thread->queue->input;
release_object( thread->queue );
thread->queue = NULL;
}
/* get the hook table for a given thread */
struct hook_table *get_queue_hooks( struct thread *thread )
{
if (!thread->queue) return NULL;
return thread->queue->hooks;
}
/* set the hook table for a given thread, allocating the queue if needed */
void set_queue_hooks( struct thread *thread, struct hook_table *hooks )
{
struct msg_queue *queue = thread->queue;
if (!queue) queue = create_msg_queue( thread, NULL );
if (queue->hooks) release_object( queue->hooks );
queue->hooks = hooks;
}
/* check the queue status */
inline static int is_signaled( struct msg_queue *queue )
{
return ((queue->wake_bits & queue->wake_mask) || (queue->changed_bits & queue->changed_mask));
}
/* set some queue bits */
inline static void set_queue_bits( struct msg_queue *queue, unsigned int bits )
{
queue->wake_bits |= bits;
queue->changed_bits |= bits;
if (is_signaled( queue )) wake_up( &queue->obj, 0 );
}
/* clear some queue bits */
inline static void clear_queue_bits( struct msg_queue *queue, unsigned int bits )
{
queue->wake_bits &= ~bits;
queue->changed_bits &= ~bits;
}
/* check whether msg is a keyboard message */
inline static int is_keyboard_msg( struct message *msg )
{
return (msg->msg >= WM_KEYFIRST && msg->msg <= WM_KEYLAST);
}
/* check if message is matched by the filter */
inline static int check_msg_filter( unsigned int msg, unsigned int first, unsigned int last )
{
return (msg >= first && msg <= last);
}
/* check whether a message filter contains at least one potential hardware message */
inline static int filter_contains_hw_range( unsigned int first, unsigned int last )
{
/* hardware message ranges are (in numerical order):
* WM_NCMOUSEFIRST .. WM_NCMOUSELAST
* WM_KEYFIRST .. WM_KEYLAST
* WM_MOUSEFIRST .. WM_MOUSELAST
*/
if (last < WM_NCMOUSEFIRST) return 0;
if (first > WM_NCMOUSELAST && last < WM_KEYFIRST) return 0;
if (first > WM_KEYLAST && last < WM_MOUSEFIRST) return 0;
if (first > WM_MOUSELAST) return 0;
return 1;
}
/* get the QS_* bit corresponding to a given hardware message */
inline static int get_hardware_msg_bit( struct message *msg )
{
if (msg->msg == WM_MOUSEMOVE || msg->msg == WM_NCMOUSEMOVE) return QS_MOUSEMOVE;
if (is_keyboard_msg( msg )) return QS_KEY;
return QS_MOUSEBUTTON;
}
/* get the current thread queue, creating it if needed */
inline static struct msg_queue *get_current_queue(void)
{
struct msg_queue *queue = current->queue;
if (!queue) queue = create_msg_queue( current, NULL );
return queue;
}
/* get a (pseudo-)unique id to tag hardware messages */
inline static unsigned int get_unique_id(void)
{
static unsigned int id;
if (!++id) id = 1; /* avoid an id of 0 */
return id;
}
/* try to merge a message with the last in the list; return 1 if successful */
static int merge_message( struct thread_input *input, const struct message *msg )
{
struct message *prev;
struct list *ptr = list_tail( &input->msg_list );
if (!ptr) return 0;
prev = LIST_ENTRY( ptr, struct message, entry );
if (prev->unique_id) return 0;
if (prev->result) return 0;
if (prev->win != msg->win) return 0;
if (prev->msg != msg->msg) return 0;
if (prev->type != msg->type) return 0;
/* now we can merge it */
prev->wparam = msg->wparam;
prev->lparam = msg->lparam;
prev->x = msg->x;
prev->y = msg->y;
prev->time = msg->time;
prev->info = msg->info;
return 1;
}
/* free a result structure */
static void free_result( struct message_result *result )
{
if (result->timeout) remove_timeout_user( result->timeout );
if (result->data) free( result->data );
if (result->callback_msg) free( result->callback_msg );
free( result );
}
/* remove the result from the sender list it is on */
static inline void remove_result_from_sender( struct message_result *result )
{
assert( result->sender );
list_remove( &result->sender_entry );
result->sender = NULL;
if (!result->receiver) free_result( result );
}
/* store the message result in the appropriate structure */
static void store_message_result( struct message_result *res, unsigned int result,
unsigned int error )
{
res->result = result;
res->error = error;
res->replied = 1;
if (res->timeout)
{
remove_timeout_user( res->timeout );
res->timeout = NULL;
}
if (res->sender)
{
if (res->callback_msg)
{
/* queue the callback message in the sender queue */
res->callback_msg->lparam = result;
list_add_tail( &res->sender->msg_list[SEND_MESSAGE], &res->callback_msg->entry );
set_queue_bits( res->sender, QS_SENDMESSAGE );
res->callback_msg = NULL;
remove_result_from_sender( res );
}
else
{
/* wake sender queue if waiting on this result */
if (list_head(&res->sender->send_result) == &res->sender_entry)
set_queue_bits( res->sender, QS_SMRESULT );
}
}
}
/* free a message when deleting a queue or window */
static void free_message( struct message *msg )
{
struct message_result *result = msg->result;
if (result)
{
if (result->sender)
{
result->receiver = NULL;
store_message_result( result, 0, STATUS_ACCESS_DENIED /*FIXME*/ );
}
else free_result( result );
}
if (msg->data) free( msg->data );
free( msg );
}
/* remove (and free) a message from a message list */
static void remove_queue_message( struct msg_queue *queue, struct message *msg,
enum message_kind kind )
{
list_remove( &msg->entry );
switch(kind)
{
case SEND_MESSAGE:
if (list_empty( &queue->msg_list[kind] )) clear_queue_bits( queue, QS_SENDMESSAGE );
break;
case POST_MESSAGE:
if (list_empty( &queue->msg_list[kind] )) clear_queue_bits( queue, QS_POSTMESSAGE );
break;
}
free_message( msg );
}
/* message timed out without getting a reply */
static void result_timeout( void *private )
{
struct message_result *result = private;
assert( !result->replied );
result->timeout = NULL;
store_message_result( result, 0, STATUS_TIMEOUT );
}
/* allocate and fill a message result structure */
static struct message_result *alloc_message_result( struct msg_queue *send_queue,
struct msg_queue *recv_queue,
struct message *msg, unsigned int timeout,
void *callback, unsigned int callback_data )
{
struct message_result *result = mem_alloc( sizeof(*result) );
if (result)
{
result->sender = send_queue;
result->receiver = recv_queue;
result->replied = 0;
result->data = NULL;
result->data_size = 0;
result->timeout = NULL;
if (msg->type == MSG_CALLBACK)
{
struct message *callback_msg = mem_alloc( sizeof(*callback_msg) );
if (!callback_msg)
{
free( result );
return NULL;
}
callback_msg->type = MSG_CALLBACK_RESULT;
callback_msg->win = msg->win;
callback_msg->msg = msg->msg;
callback_msg->wparam = (unsigned int)callback;
callback_msg->lparam = 0;
callback_msg->time = get_tick_count();
callback_msg->x = 0;
callback_msg->y = 0;
callback_msg->info = callback_data;
callback_msg->hook = 0;
callback_msg->hook_proc = NULL;
callback_msg->result = NULL;
callback_msg->data = NULL;
callback_msg->data_size = 0;
result->callback_msg = callback_msg;
list_add_head( &send_queue->callback_result, &result->sender_entry );
}
else
{
result->callback_msg = NULL;
list_add_head( &send_queue->send_result, &result->sender_entry );
}
if (timeout != -1)
{
struct timeval when;
gettimeofday( &when, 0 );
add_timeout( &when, timeout );
result->timeout = add_timeout_user( &when, result_timeout, result );
}
}
return result;
}
/* receive a message, removing it from the sent queue */
static void receive_message( struct msg_queue *queue, struct message *msg,
struct get_message_reply *reply )
{
struct message_result *result = msg->result;
reply->total = msg->data_size;
if (msg->data_size > get_reply_max_size())
{
set_error( STATUS_BUFFER_OVERFLOW );
return;
}
reply->type = msg->type;
reply->win = msg->win;
reply->msg = msg->msg;
reply->wparam = msg->wparam;
reply->lparam = msg->lparam;
reply->x = msg->x;
reply->y = msg->y;
reply->time = msg->time;
reply->info = msg->info;
reply->hook = msg->hook;
reply->hook_proc = msg->hook_proc;
if (msg->data) set_reply_data_ptr( msg->data, msg->data_size );
list_remove( &msg->entry );
/* put the result on the receiver result stack */
if (result)
{
result->recv_next = queue->recv_result;
queue->recv_result = result;
}
free( msg );
if (list_empty( &queue->msg_list[SEND_MESSAGE] )) clear_queue_bits( queue, QS_SENDMESSAGE );
}
/* set the result of the current received message */
static void reply_message( struct msg_queue *queue, unsigned int result,
unsigned int error, int remove, const void *data, size_t len )
{
struct message_result *res = queue->recv_result;
if (remove)
{
queue->recv_result = res->recv_next;
res->receiver = NULL;
if (!res->sender) /* no one waiting for it */
{
free_result( res );
return;
}
}
if (!res->replied)
{
if (len && (res->data = memdup( data, len ))) res->data_size = len;
store_message_result( res, result, error );
}
}
/* retrieve a posted message */
static int get_posted_message( struct msg_queue *queue, user_handle_t win,
unsigned int first, unsigned int last, unsigned int flags,
struct get_message_reply *reply )
{
struct message *msg;
/* check against the filters */
LIST_FOR_EACH_ENTRY( msg, &queue->msg_list[POST_MESSAGE], struct message, entry )
{
if (msg->msg == WM_QUIT) goto found; /* WM_QUIT is never filtered */
if (win && msg->win && msg->win != win && !is_child_window( win, msg->win )) continue;
if (!check_msg_filter( msg->msg, first, last )) continue;
goto found; /* found one */
}
return 0;
/* return it to the app */
found:
reply->total = msg->data_size;
if (msg->data_size > get_reply_max_size())
{
set_error( STATUS_BUFFER_OVERFLOW );
return 1;
}
reply->type = msg->type;
reply->win = msg->win;
reply->msg = msg->msg;
reply->wparam = msg->wparam;
reply->lparam = msg->lparam;
reply->x = msg->x;
reply->y = msg->y;
reply->time = msg->time;
reply->info = msg->info;
if (flags & GET_MSG_REMOVE)
{
if (msg->data)
{
set_reply_data_ptr( msg->data, msg->data_size );
msg->data = NULL;
msg->data_size = 0;
}
remove_queue_message( queue, msg, POST_MESSAGE );
}
else if (msg->data) set_reply_data( msg->data, msg->data_size );
return 1;
}
/* empty a message list and free all the messages */
static void empty_msg_list( struct list *list )
{
struct list *ptr;
while ((ptr = list_head( list )) != NULL)
{
struct message *msg = LIST_ENTRY( ptr, struct message, entry );
list_remove( &msg->entry );
free_message( msg );
}
}
/* cleanup all pending results when deleting a queue */
static void cleanup_results( struct msg_queue *queue )
{
struct list *entry;
while ((entry = list_head( &queue->send_result )) != NULL)
{
remove_result_from_sender( LIST_ENTRY( entry, struct message_result, sender_entry ) );
}
while ((entry = list_head( &queue->callback_result )) != NULL)
{
remove_result_from_sender( LIST_ENTRY( entry, struct message_result, sender_entry ) );
}
while (queue->recv_result)
reply_message( queue, 0, STATUS_ACCESS_DENIED /*FIXME*/, 1, NULL, 0 );
}
/* check if the thread owning the queue is hung (not checking for messages) */
static int is_queue_hung( struct msg_queue *queue )
{
struct timeval now;
struct wait_queue_entry *entry;
gettimeofday( &now, NULL );
if (now.tv_sec - queue->last_get_msg.tv_sec <= 5)
return 0; /* less than 5 seconds since last get message -> not hung */
LIST_FOR_EACH_ENTRY( entry, &queue->obj.wait_queue, struct wait_queue_entry, entry )
{
if (entry->thread->queue == queue)
return 0; /* thread is waiting on queue -> not hung */
}
return 1;
}
static int msg_queue_add_queue( struct object *obj, struct wait_queue_entry *entry )
{
struct msg_queue *queue = (struct msg_queue *)obj;
struct process *process = entry->thread->process;
/* a thread can only wait on its own queue */
if (entry->thread->queue != queue)
{
set_error( STATUS_ACCESS_DENIED );
return 0;
}
/* if waiting on the main process queue, set the idle event */
if (process->queue == queue)
{
if (process->idle_event) set_event( process->idle_event );
}
add_queue( obj, entry );
return 1;
}
static void msg_queue_remove_queue(struct object *obj, struct wait_queue_entry *entry )
{
struct msg_queue *queue = (struct msg_queue *)obj;
struct process *process = entry->thread->process;
remove_queue( obj, entry );
assert( entry->thread->queue == queue );
/* if waiting on the main process queue, reset the idle event */
if (process->queue == queue)
{
if (process->idle_event) reset_event( process->idle_event );
}
}
static void msg_queue_dump( struct object *obj, int verbose )
{
struct msg_queue *queue = (struct msg_queue *)obj;
fprintf( stderr, "Msg queue bits=%x mask=%x\n",
queue->wake_bits, queue->wake_mask );
}
static int msg_queue_signaled( struct object *obj, struct thread *thread )
{
struct msg_queue *queue = (struct msg_queue *)obj;
return is_signaled( queue );
}
static int msg_queue_satisfied( struct object *obj, struct thread *thread )
{
struct msg_queue *queue = (struct msg_queue *)obj;
queue->wake_mask = 0;
queue->changed_mask = 0;
return 0; /* Not abandoned */
}
static void msg_queue_destroy( struct object *obj )
{
struct msg_queue *queue = (struct msg_queue *)obj;
struct list *ptr;
int i;
cleanup_results( queue );
for (i = 0; i < NB_MSG_KINDS; i++) empty_msg_list( &queue->msg_list[i] );
while ((ptr = list_head( &queue->pending_timers )))
{
struct timer *timer = LIST_ENTRY( ptr, struct timer, entry );
list_remove( &timer->entry );
free( timer );
}
while ((ptr = list_head( &queue->expired_timers )))
{
struct timer *timer = LIST_ENTRY( ptr, struct timer, entry );
list_remove( &timer->entry );
free( timer );
}
if (queue->timeout) remove_timeout_user( queue->timeout );
if (queue->input) release_object( queue->input );
if (queue->hooks) release_object( queue->hooks );
}
static void thread_input_dump( struct object *obj, int verbose )
{
struct thread_input *input = (struct thread_input *)obj;
fprintf( stderr, "Thread input focus=%p capture=%p active=%p\n",
input->focus, input->capture, input->active );
}
static void thread_input_destroy( struct object *obj )
{
struct thread_input *input = (struct thread_input *)obj;
if (foreground_input == input) foreground_input = NULL;
empty_msg_list( &input->msg_list );
}
/* fix the thread input data when a window is destroyed */
inline static void thread_input_cleanup_window( struct msg_queue *queue, user_handle_t window )
{
struct thread_input *input = queue->input;
if (window == input->focus) input->focus = 0;
if (window == input->capture) input->capture = 0;
if (window == input->active) input->active = 0;
if (window == input->menu_owner) input->menu_owner = 0;
if (window == input->move_size) input->move_size = 0;
if (window == input->caret) set_caret_window( input, 0 );
}
/* check if the specified window can be set in the input data of a given queue */
static int check_queue_input_window( struct msg_queue *queue, user_handle_t window )
{
struct thread *thread;
int ret = 0;
if (!window) return 1; /* we can always clear the data */
if ((thread = get_window_thread( window )))
{
ret = (queue->input == thread->queue->input);
if (!ret) set_error( STATUS_ACCESS_DENIED );
release_object( thread );
}
else set_error( STATUS_INVALID_HANDLE );
return ret;
}
/* attach two thread input data structures */
int attach_thread_input( struct thread *thread_from, struct thread *thread_to )
{
struct thread_input *input;
if (!thread_to->queue && !(thread_to->queue = create_msg_queue( thread_to, NULL ))) return 0;
input = (struct thread_input *)grab_object( thread_to->queue->input );
if (thread_from->queue)
{
release_thread_input( thread_from );
thread_from->queue->input = input;
}
else
{
if (!(thread_from->queue = create_msg_queue( thread_from, input ))) return 0;
}
memset( input->keystate, 0, sizeof(input->keystate) );
return 1;
}
/* detach two thread input data structures */
static void detach_thread_input( struct thread *thread_from, struct thread *thread_to )
{
struct thread_input *input;
if (!thread_from->queue || !thread_to->queue ||
thread_from->queue->input != thread_to->queue->input)
{
set_error( STATUS_ACCESS_DENIED );
return;
}
if ((input = create_thread_input()))
{
release_thread_input( thread_from );
thread_from->queue->input = input;
}
}
/* set the next timer to expire */
static void set_next_timer( struct msg_queue *queue )
{
struct list *ptr;
if (queue->timeout)
{
remove_timeout_user( queue->timeout );
queue->timeout = NULL;
}
if ((ptr = list_head( &queue->pending_timers )))
{
struct timer *timer = LIST_ENTRY( ptr, struct timer, entry );
queue->timeout = add_timeout_user( &timer->when, timer_callback, queue );
}
/* set/clear QS_TIMER bit */
if (list_empty( &queue->expired_timers ))
clear_queue_bits( queue, QS_TIMER );
else
set_queue_bits( queue, QS_TIMER );
}
/* find a timer from its window and id */
static struct timer *find_timer( struct msg_queue *queue, user_handle_t win,
unsigned int msg, unsigned int id )
{
struct list *ptr;
/* we need to search both lists */
LIST_FOR_EACH( ptr, &queue->pending_timers )
{
struct timer *timer = LIST_ENTRY( ptr, struct timer, entry );
if (timer->win == win && timer->msg == msg && timer->id == id) return timer;
}
LIST_FOR_EACH( ptr, &queue->expired_timers )
{
struct timer *timer = LIST_ENTRY( ptr, struct timer, entry );
if (timer->win == win && timer->msg == msg && timer->id == id) return timer;
}
return NULL;
}
/* callback for the next timer expiration */
static void timer_callback( void *private )
{
struct msg_queue *queue = private;
struct list *ptr;
queue->timeout = NULL;
/* move on to the next timer */
ptr = list_head( &queue->pending_timers );
list_remove( ptr );
list_add_tail( &queue->expired_timers, ptr );
set_next_timer( queue );
}
/* link a timer at its rightful place in the queue list */
static void link_timer( struct msg_queue *queue, struct timer *timer )
{
struct list *ptr;
for (ptr = queue->pending_timers.next; ptr != &queue->pending_timers; ptr = ptr->next)
{
struct timer *t = LIST_ENTRY( ptr, struct timer, entry );
if (!time_before( &t->when, &timer->when )) break;
}
list_add_before( ptr, &timer->entry );
}
/* remove a timer from the queue timer list and free it */
static void free_timer( struct msg_queue *queue, struct timer *timer )
{
list_remove( &timer->entry );
free( timer );
set_next_timer( queue );
}
/* restart an expired timer */
static void restart_timer( struct msg_queue *queue, struct timer *timer )
{
struct timeval now;
list_remove( &timer->entry );
gettimeofday( &now, 0 );
while (!time_before( &now, &timer->when )) add_timeout( &timer->when, timer->rate );
link_timer( queue, timer );
set_next_timer( queue );
}
/* find an expired timer matching the filtering parameters */
static struct timer *find_expired_timer( struct msg_queue *queue, user_handle_t win,
unsigned int get_first, unsigned int get_last,
int remove )
{
struct list *ptr;
LIST_FOR_EACH( ptr, &queue->expired_timers )
{
struct timer *timer = LIST_ENTRY( ptr, struct timer, entry );
if (win && timer->win != win) continue;
if (check_msg_filter( timer->msg, get_first, get_last ))
{
if (remove) restart_timer( queue, timer );
return timer;
}
}
return NULL;
}
/* add a timer */
static struct timer *set_timer( struct msg_queue *queue, unsigned int rate )
{
struct timer *timer = mem_alloc( sizeof(*timer) );
if (timer)
{
timer->rate = max( rate, 1 );
gettimeofday( &timer->when, 0 );
add_timeout( &timer->when, rate );
link_timer( queue, timer );
/* check if we replaced the next timer */
if (list_head( &queue->pending_timers ) == &timer->entry) set_next_timer( queue );
}
return timer;
}
/* change the input key state for a given key */
static void set_input_key_state( struct thread_input *input, unsigned char key, int down )
{
if (down)
{
if (!(input->keystate[key] & 0x80)) input->keystate[key] ^= 0x01;
input->keystate[key] |= 0x80;
}
else input->keystate[key] &= ~0x80;
}
/* update the input key state for a keyboard message */
static void update_input_key_state( struct thread_input *input, const struct message *msg )
{
unsigned char key;
int down = 0, extended;
switch (msg->msg)
{
case WM_LBUTTONDOWN:
down = 1;
/* fall through */
case WM_LBUTTONUP:
set_input_key_state( input, VK_LBUTTON, down );
break;
case WM_MBUTTONDOWN:
down = 1;
/* fall through */
case WM_MBUTTONUP:
set_input_key_state( input, VK_MBUTTON, down );
break;
case WM_RBUTTONDOWN:
down = 1;
/* fall through */
case WM_RBUTTONUP:
set_input_key_state( input, VK_RBUTTON, down );
break;
case WM_XBUTTONDOWN:
down = 1;
/* fall through */
case WM_XBUTTONUP:
if (msg->wparam == XBUTTON1) set_input_key_state( input, VK_XBUTTON1, down );
else if (msg->wparam == XBUTTON2) set_input_key_state( input, VK_XBUTTON2, down );
break;
case WM_KEYDOWN:
case WM_SYSKEYDOWN:
down = 1;
/* fall through */
case WM_KEYUP:
case WM_SYSKEYUP:
key = (unsigned char)msg->wparam;
extended = ((msg->lparam >> 16) & KF_EXTENDED) != 0;
set_input_key_state( input, key, down );
switch(key)
{
case VK_SHIFT:
set_input_key_state( input, extended ? VK_RSHIFT : VK_LSHIFT, down );
break;
case VK_CONTROL:
set_input_key_state( input, extended ? VK_RCONTROL : VK_LCONTROL, down );
break;
case VK_MENU:
set_input_key_state( input, extended ? VK_RMENU : VK_LMENU, down );
break;
}
break;
}
}
/* release the hardware message currently being processed by the given thread */
static void release_hardware_message( struct msg_queue *queue, unsigned int hw_id,
int remove, user_handle_t new_win )
{
struct thread_input *input = queue->input;
struct message *msg;
LIST_FOR_EACH_ENTRY( msg, &input->msg_list, struct message, entry )
{
if (msg->unique_id == hw_id) break;
}
if (&msg->entry == &input->msg_list) return; /* not found */
/* clear the queue bit for that message */
if (remove || new_win)
{
struct message *other;
int clr_bit;
clr_bit = get_hardware_msg_bit( msg );
LIST_FOR_EACH_ENTRY( other, &input->msg_list, struct message, entry )
{
if (other != msg && get_hardware_msg_bit( other ) == clr_bit)
{
clr_bit = 0;
break;
}
}
if (clr_bit) clear_queue_bits( queue, clr_bit );
}
if (new_win) /* set the new window */
{
struct thread *owner = get_window_thread( new_win );
if (owner)
{
msg->win = new_win;
set_queue_bits( owner->queue, get_hardware_msg_bit( msg ));
release_object( owner );
}
if (!remove) return; /* don't release the message */
}
else if (remove)
{
update_input_key_state( input, msg );
list_remove( &msg->entry );
free_message( msg );
}
}
/* find the window that should receive a given hardware message */
static user_handle_t find_hardware_message_window( struct thread_input *input, struct message *msg,
unsigned int *msg_code )
{
user_handle_t win = 0;
*msg_code = msg->msg;
if (is_keyboard_msg( msg ))
{
if (input && !(win = input->focus))
{
win = input->active;
if (*msg_code < WM_SYSKEYDOWN) *msg_code += WM_SYSKEYDOWN - WM_KEYDOWN;
}
}
else /* mouse message */
{
if (!input || !(win = input->capture))
{
if (!(win = msg->win) || !is_window_visible( win ))
win = window_from_point( msg->x, msg->y );
}
}
return win;
}
/* queue a hardware message into a given thread input */
static void queue_hardware_message( struct msg_queue *queue, struct message *msg )
{
user_handle_t win;
struct thread *thread;
struct thread_input *input;
unsigned int msg_code;
win = find_hardware_message_window( queue ? queue->input : foreground_input, msg, &msg_code );
if (!win || !(thread = get_window_thread(win)))
{
free( msg );
return;
}
input = thread->queue->input;
if (msg->msg == WM_MOUSEMOVE && merge_message( input, msg )) free( msg );
else
{
msg->unique_id = 0; /* will be set once we return it to the app */
list_add_tail( &input->msg_list, &msg->entry );
set_queue_bits( thread->queue, get_hardware_msg_bit(msg) );
}
release_object( thread );
}
/* check message filter for a hardware message */
static int check_hw_message_filter( user_handle_t win, unsigned int msg_code,
user_handle_t filter_win, unsigned int first, unsigned int last )
{
if (msg_code >= WM_KEYFIRST && msg_code <= WM_KEYLAST)
{
/* we can only test the window for a keyboard message since the
* dest window for a mouse message depends on hittest */
if (filter_win && win != filter_win && !is_child_window( filter_win, win ))
return 0;
/* the message code is final for a keyboard message, we can simply check it */
return check_msg_filter( msg_code, first, last );
}
else /* mouse message */
{
/* we need to check all possible values that the message can have in the end */
if (check_msg_filter( msg_code, first, last )) return 1;
if (msg_code == WM_MOUSEWHEEL) return 0; /* no other possible value for this one */
/* all other messages can become non-client messages */
if (check_msg_filter( msg_code + (WM_NCMOUSEFIRST - WM_MOUSEFIRST), first, last )) return 1;
/* clicks can become double-clicks or non-client double-clicks */
if (msg_code == WM_LBUTTONDOWN || msg_code == WM_MBUTTONDOWN ||
msg_code == WM_RBUTTONDOWN || msg_code == WM_XBUTTONDOWN)
{
if (check_msg_filter( msg_code + (WM_LBUTTONDBLCLK - WM_LBUTTONDOWN), first, last )) return 1;
if (check_msg_filter( msg_code + (WM_NCLBUTTONDBLCLK - WM_LBUTTONDOWN), first, last )) return 1;
}
return 0;
}
}
/* find a hardware message for the given queue */
static int get_hardware_message( struct thread *thread, int hw_id, user_handle_t filter_win,
unsigned int first, unsigned int last, struct get_message_reply *reply )
{
struct thread_input *input = thread->queue->input;
struct thread *win_thread;
struct list *ptr;
user_handle_t win;
int clear_bits, got_one = 0;
unsigned int msg_code;
ptr = list_head( &input->msg_list );
if (hw_id)
{
while (ptr)
{
struct message *msg = LIST_ENTRY( ptr, struct message, entry );
if (msg->unique_id == hw_id) break;
ptr = list_next( &input->msg_list, ptr );
}
if (!ptr) ptr = list_head( &input->msg_list );
else ptr = list_next( &input->msg_list, ptr ); /* start from the next one */
}
if (ptr == list_head( &input->msg_list ))
clear_bits = QS_KEY | QS_MOUSEMOVE | QS_MOUSEBUTTON;
else
clear_bits = 0; /* don't clear bits if we don't go through the whole list */
while (ptr)
{
struct message *msg = LIST_ENTRY( ptr, struct message, entry );
win = find_hardware_message_window( input, msg, &msg_code );
if (!win || !(win_thread = get_window_thread( win )))
{
/* no window at all, remove it */
ptr = list_next( &input->msg_list, ptr );
update_input_key_state( input, msg );
list_remove( &msg->entry );
free_message( msg );
continue;
}
if (win_thread != thread)
{
/* wake the other thread */
set_queue_bits( win_thread->queue, get_hardware_msg_bit(msg) );
release_object( win_thread );
got_one = 1;
ptr = list_next( &input->msg_list, ptr );
continue;
}
release_object( win_thread );
/* if we already got a message for another thread, or if it doesn't
* match the filter we skip it */
if (got_one || !check_hw_message_filter( win, msg_code, filter_win, first, last ))
{
clear_bits &= ~get_hardware_msg_bit( msg );
ptr = list_next( &input->msg_list, ptr );
continue;
}
/* now we can return it */
if (!msg->unique_id) msg->unique_id = get_unique_id();
reply->type = MSG_HARDWARE;
reply->win = win;
reply->msg = msg_code;
reply->wparam = msg->wparam;
reply->lparam = msg->lparam;
reply->x = msg->x;
reply->y = msg->y;
reply->time = msg->time;
reply->info = msg->info;
reply->hw_id = msg->unique_id;
return 1;
}
/* nothing found, clear the hardware queue bits */
clear_queue_bits( thread->queue, clear_bits );
return 0;
}
/* increment (or decrement if 'incr' is negative) the queue paint count */
void inc_queue_paint_count( struct thread *thread, int incr )
{
struct msg_queue *queue = thread->queue;
assert( queue );
if ((queue->paint_count += incr) < 0) queue->paint_count = 0;
if (queue->paint_count)
set_queue_bits( queue, QS_PAINT );
else
clear_queue_bits( queue, QS_PAINT );
}
/* remove all messages and timers belonging to a certain window */
void queue_cleanup_window( struct thread *thread, user_handle_t win )
{
struct msg_queue *queue = thread->queue;
struct list *ptr;
int i;
if (!queue) return;
/* remove timers */
ptr = list_head( &queue->pending_timers );
while (ptr)
{
struct list *next = list_next( &queue->pending_timers, ptr );
struct timer *timer = LIST_ENTRY( ptr, struct timer, entry );
if (timer->win == win) free_timer( queue, timer );
ptr = next;
}
ptr = list_head( &queue->expired_timers );
while (ptr)
{
struct list *next = list_next( &queue->expired_timers, ptr );
struct timer *timer = LIST_ENTRY( ptr, struct timer, entry );
if (timer->win == win) free_timer( queue, timer );
ptr = next;
}
/* remove messages */
for (i = 0; i < NB_MSG_KINDS; i++)
{
struct list *ptr, *next;
LIST_FOR_EACH_SAFE( ptr, next, &queue->msg_list[i] )
{
struct message *msg = LIST_ENTRY( ptr, struct message, entry );
if (msg->win == win) remove_queue_message( queue, msg, i );
}
}
thread_input_cleanup_window( queue, win );
}
/* post a message to a window; used by socket handling */
void post_message( user_handle_t win, unsigned int message,
unsigned int wparam, unsigned int lparam )
{
struct message *msg;
struct thread *thread = get_window_thread( win );
if (!thread) return;
if (thread->queue && (msg = mem_alloc( sizeof(*msg) )))
{
msg->type = MSG_POSTED;
msg->win = get_user_full_handle( win );
msg->msg = message;
msg->wparam = wparam;
msg->lparam = lparam;
msg->time = get_tick_count();
msg->x = 0;
msg->y = 0;
msg->info = 0;
msg->hook = 0;
msg->hook_proc = NULL;
msg->result = NULL;
msg->data = NULL;
msg->data_size = 0;
list_add_tail( &thread->queue->msg_list[POST_MESSAGE], &msg->entry );
set_queue_bits( thread->queue, QS_POSTMESSAGE );
}
release_object( thread );
}
/* post a win event */
void post_win_event( struct thread *thread, unsigned int event,
user_handle_t win, unsigned int object_id,
unsigned int child_id, void *hook_proc,
const WCHAR *module, size_t module_size,
user_handle_t hook)
{
struct message *msg;
if (thread->queue && (msg = mem_alloc( sizeof(*msg) )))
{
msg->type = MSG_WINEVENT;
msg->win = get_user_full_handle( win );
msg->msg = event;
msg->wparam = object_id;
msg->lparam = child_id;
msg->time = get_tick_count();
msg->x = 0;
msg->y = 0;
msg->info = get_thread_id( current );
msg->result = NULL;
msg->hook = hook;
msg->hook_proc = hook_proc;
if ((msg->data = malloc( module_size )))
{
msg->data_size = module_size;
memcpy( msg->data, module, module_size );
if (debug_level > 1)
fprintf( stderr, "post_win_event: tid %04x event %04x win %p object_id %d child_id %d\n",
get_thread_id(thread), event, win, object_id, child_id );
list_add_tail( &thread->queue->msg_list[SEND_MESSAGE], &msg->entry );
set_queue_bits( thread->queue, QS_SENDMESSAGE );
}
else
free( msg );
}
}
/* get the message queue of the current thread */
DECL_HANDLER(get_msg_queue)
{
struct msg_queue *queue = get_current_queue();
reply->handle = 0;
if (queue) reply->handle = alloc_handle( current->process, queue, SYNCHRONIZE, 0 );
}
/* set the current message queue wakeup mask */
DECL_HANDLER(set_queue_mask)
{
struct msg_queue *queue = get_current_queue();
if (queue)
{
queue->wake_mask = req->wake_mask;
queue->changed_mask = req->changed_mask;
reply->wake_bits = queue->wake_bits;
reply->changed_bits = queue->changed_bits;
if (is_signaled( queue ))
{
/* if skip wait is set, do what would have been done in the subsequent wait */
if (req->skip_wait) msg_queue_satisfied( &queue->obj, current );
else wake_up( &queue->obj, 0 );
}
}
}
/* get the current message queue status */
DECL_HANDLER(get_queue_status)
{
struct msg_queue *queue = current->queue;
if (queue)
{
reply->wake_bits = queue->wake_bits;
reply->changed_bits = queue->changed_bits;
if (req->clear) queue->changed_bits = 0;
}
else reply->wake_bits = reply->changed_bits = 0;
}
/* send a message to a thread queue */
DECL_HANDLER(send_message)
{
struct message *msg;
struct msg_queue *send_queue = get_current_queue();
struct msg_queue *recv_queue = NULL;
struct thread *thread = NULL;
if (req->id)
{
if (!(thread = get_thread_from_id( req->id ))) return;
}
else if (req->type != MSG_HARDWARE)
{
/* only hardware messages are allowed without destination thread */
set_error( STATUS_INVALID_PARAMETER );
return;
}
if (thread && !(recv_queue = thread->queue))
{
set_error( STATUS_INVALID_PARAMETER );
release_object( thread );
return;
}
if (recv_queue && (req->flags & SEND_MSG_ABORT_IF_HUNG) && is_queue_hung(recv_queue))
{
set_error( STATUS_TIMEOUT );
release_object( thread );
return;
}
if ((msg = mem_alloc( sizeof(*msg) )))
{
msg->type = req->type;
msg->win = get_user_full_handle( req->win );
msg->msg = req->msg;
msg->wparam = req->wparam;
msg->lparam = req->lparam;
msg->time = req->time;
msg->x = req->x;
msg->y = req->y;
msg->info = req->info;
msg->hook = 0;
msg->hook_proc = NULL;
msg->result = NULL;
msg->data = NULL;
msg->data_size = 0;
switch(msg->type)
{
case MSG_OTHER_PROCESS:
msg->data_size = get_req_data_size();
if (msg->data_size && !(msg->data = memdup( get_req_data(), msg->data_size )))
{
free( msg );
break;
}
/* fall through */
case MSG_ASCII:
case MSG_UNICODE:
case MSG_CALLBACK:
if (!(msg->result = alloc_message_result( send_queue, recv_queue, msg,
req->timeout, req->callback, req->info )))
{
free_message( msg );
break;
}
/* fall through */
case MSG_NOTIFY:
list_add_tail( &recv_queue->msg_list[SEND_MESSAGE], &msg->entry );
set_queue_bits( recv_queue, QS_SENDMESSAGE );
break;
case MSG_POSTED:
/* needed for posted DDE messages */
msg->data_size = get_req_data_size();
if (msg->data_size && !(msg->data = memdup( get_req_data(), msg->data_size )))
{
free( msg );
break;
}
list_add_tail( &recv_queue->msg_list[POST_MESSAGE], &msg->entry );
set_queue_bits( recv_queue, QS_POSTMESSAGE );
break;
case MSG_HARDWARE:
queue_hardware_message( recv_queue, msg );
break;
case MSG_CALLBACK_RESULT: /* cannot send this one */
default:
set_error( STATUS_INVALID_PARAMETER );
free( msg );
break;
}
}
if (thread) release_object( thread );
}
/* get a message from the current queue */
DECL_HANDLER(get_message)
{
struct timer *timer;
struct list *ptr;
struct msg_queue *queue = get_current_queue();
user_handle_t get_win = get_user_full_handle( req->get_win );
if (!queue) return;
gettimeofday( &queue->last_get_msg, NULL );
/* first check for sent messages */
if ((ptr = list_head( &queue->msg_list[SEND_MESSAGE] )))
{
struct message *msg = LIST_ENTRY( ptr, struct message, entry );
receive_message( queue, msg, reply );
return;
}
if (req->flags & GET_MSG_SENT_ONLY) goto done; /* nothing else to check */
/* clear changed bits so we can wait on them if we don't find a message */
queue->changed_bits = 0;
/* then check for posted messages */
if (get_posted_message( queue, get_win, req->get_first, req->get_last, req->flags, reply ))
return;
/* then check for any raw hardware message */
if (filter_contains_hw_range( req->get_first, req->get_last ) &&
get_hardware_message( current, req->hw_id, get_win, req->get_first, req->get_last, reply ))
return;
/* now check for WM_PAINT */
if (queue->paint_count &&
check_msg_filter( WM_PAINT, req->get_first, req->get_last ) &&
(reply->win = find_window_to_repaint( get_win, current )))
{
reply->type = MSG_POSTED;
reply->msg = WM_PAINT;
reply->wparam = 0;
reply->lparam = 0;
reply->x = 0;
reply->y = 0;
reply->time = get_tick_count();
reply->info = 0;
return;
}
/* now check for timer */
if ((timer = find_expired_timer( queue, get_win, req->get_first,
req->get_last, (req->flags & GET_MSG_REMOVE) )))
{
reply->type = MSG_POSTED;
reply->win = timer->win;
reply->msg = timer->msg;
reply->wparam = timer->id;
reply->lparam = timer->lparam;
reply->x = 0;
reply->y = 0;
reply->time = get_tick_count();
reply->info = 0;
return;
}
done:
set_error( STATUS_PENDING ); /* FIXME */
}
/* reply to a sent message */
DECL_HANDLER(reply_message)
{
if (!current->queue) set_error( STATUS_ACCESS_DENIED );
else if (current->queue->recv_result)
reply_message( current->queue, req->result, 0, req->remove,
get_req_data(), get_req_data_size() );
}
/* accept the current hardware message */
DECL_HANDLER(accept_hardware_message)
{
if (current->queue)
release_hardware_message( current->queue, req->hw_id, req->remove, req->new_win );
else
set_error( STATUS_ACCESS_DENIED );
}
/* retrieve the reply for the last message sent */
DECL_HANDLER(get_message_reply)
{
struct message_result *result;
struct list *entry;
struct msg_queue *queue = current->queue;
if (queue)
{
set_error( STATUS_PENDING );
reply->result = 0;
if (!(entry = list_head( &queue->send_result ))) return; /* no reply ready */
result = LIST_ENTRY( entry, struct message_result, sender_entry );
if (result->replied || req->cancel)
{
if (result->replied)
{
reply->result = result->result;
set_error( result->error );
if (result->data)
{
size_t data_len = min( result->data_size, get_reply_max_size() );
set_reply_data_ptr( result->data, data_len );
result->data = NULL;
result->data_size = 0;
}
}
remove_result_from_sender( result );
entry = list_head( &queue->send_result );
if (!entry) clear_queue_bits( queue, QS_SMRESULT );
else
{
result = LIST_ENTRY( entry, struct message_result, sender_entry );
if (!result->replied) clear_queue_bits( queue, QS_SMRESULT );
}
}
}
else set_error( STATUS_ACCESS_DENIED );
}
/* set a window timer */
DECL_HANDLER(set_win_timer)
{
struct timer *timer;
struct msg_queue *queue;
struct thread *thread = NULL;
user_handle_t win = 0;
unsigned int id = req->id;
if (req->win)
{
if (!(win = get_user_full_handle( req->win )) || !(thread = get_window_thread( win )))
{
set_error( STATUS_INVALID_HANDLE );
return;
}
if (thread->process != current->process)
{
release_object( thread );
set_error( STATUS_ACCESS_DENIED );
return;
}
queue = thread->queue;
/* remove it if it existed already */
if ((timer = find_timer( queue, win, req->msg, id ))) free_timer( queue, timer );
}
else
{
queue = get_current_queue();
/* find a free id for it */
do
{
id = queue->next_timer_id;
if (++queue->next_timer_id >= 0x10000) queue->next_timer_id = 1;
}
while (find_timer( queue, 0, req->msg, id ));
}
if ((timer = set_timer( queue, req->rate )))
{
timer->win = win;
timer->msg = req->msg;
timer->id = id;
timer->lparam = req->lparam;
reply->id = id;
}
if (thread) release_object( thread );
}
/* kill a window timer */
DECL_HANDLER(kill_win_timer)
{
struct timer *timer;
struct thread *thread;
user_handle_t win = 0;
if (req->win)
{
if (!(win = get_user_full_handle( req->win )) || !(thread = get_window_thread( win )))
{
set_error( STATUS_INVALID_HANDLE );
return;
}
if (thread->process != current->process)
{
release_object( thread );
set_error( STATUS_ACCESS_DENIED );
return;
}
}
else thread = (struct thread *)grab_object( current );
if (thread->queue && (timer = find_timer( thread->queue, win, req->msg, req->id )))
free_timer( thread->queue, timer );
else
set_error( STATUS_INVALID_PARAMETER );
release_object( thread );
}
/* attach (or detach) thread inputs */
DECL_HANDLER(attach_thread_input)
{
struct thread *thread_from = get_thread_from_id( req->tid_from );
struct thread *thread_to = get_thread_from_id( req->tid_to );
if (!thread_from || !thread_to)
{
if (thread_from) release_object( thread_from );
if (thread_to) release_object( thread_to );
return;
}
if (thread_from != thread_to)
{
if (req->attach) attach_thread_input( thread_from, thread_to );
else detach_thread_input( thread_from, thread_to );
}
else set_error( STATUS_ACCESS_DENIED );
release_object( thread_from );
release_object( thread_to );
}
/* get thread input data */
DECL_HANDLER(get_thread_input)
{
struct thread *thread = NULL;
struct thread_input *input;
if (req->tid)
{
if (!(thread = get_thread_from_id( req->tid ))) return;
input = thread->queue ? thread->queue->input : NULL;
}
else input = foreground_input; /* get the foreground thread info */
if (input)
{
reply->focus = input->focus;
reply->capture = input->capture;
reply->active = input->active;
reply->menu_owner = input->menu_owner;
reply->move_size = input->move_size;
reply->caret = input->caret;
reply->rect = input->caret_rect;
}
else
{
reply->focus = 0;
reply->capture = 0;
reply->active = 0;
reply->menu_owner = 0;
reply->move_size = 0;
reply->caret = 0;
reply->rect.left = reply->rect.top = reply->rect.right = reply->rect.bottom = 0;
}
/* foreground window is active window of foreground thread */
reply->foreground = foreground_input ? foreground_input->active : 0;
if (thread) release_object( thread );
}
/* retrieve queue keyboard state for a given thread */
DECL_HANDLER(get_key_state)
{
struct thread *thread;
struct thread_input *input;
if (!(thread = get_thread_from_id( req->tid ))) return;
input = thread->queue ? thread->queue->input : NULL;
if (input)
{
if (req->key >= 0) reply->state = input->keystate[req->key & 0xff];
set_reply_data( input->keystate, min( get_reply_max_size(), sizeof(input->keystate) ));
}
release_object( thread );
}
/* set queue keyboard state for a given thread */
DECL_HANDLER(set_key_state)
{
struct thread *thread = NULL;
struct thread_input *input;
if (!(thread = get_thread_from_id( req->tid ))) return;
input = thread->queue ? thread->queue->input : NULL;
if (input)
{
size_t size = min( sizeof(input->keystate), get_req_data_size() );
if (size) memcpy( input->keystate, get_req_data(), size );
}
release_object( thread );
}
/* set the system foreground window */
DECL_HANDLER(set_foreground_window)
{
struct msg_queue *queue = get_current_queue();
reply->previous = foreground_input ? foreground_input->active : 0;
reply->send_msg_old = (reply->previous && foreground_input != queue->input);
reply->send_msg_new = FALSE;
if (req->handle)
{
struct thread *thread;
if (is_top_level_window( req->handle ) &&
((thread = get_window_thread( req->handle ))))
{
foreground_input = thread->queue->input;
reply->send_msg_new = (foreground_input != queue->input);
release_object( thread );
}
else set_error( STATUS_INVALID_HANDLE );
}
else foreground_input = NULL;
}
/* set the current thread focus window */
DECL_HANDLER(set_focus_window)
{
struct msg_queue *queue = get_current_queue();
reply->previous = 0;
if (queue && check_queue_input_window( queue, req->handle ))
{
reply->previous = queue->input->focus;
queue->input->focus = get_user_full_handle( req->handle );
}
}
/* set the current thread active window */
DECL_HANDLER(set_active_window)
{
struct msg_queue *queue = get_current_queue();
reply->previous = 0;
if (queue && check_queue_input_window( queue, req->handle ))
{
if (!req->handle || make_window_active( req->handle ))
{
reply->previous = queue->input->active;
queue->input->active = get_user_full_handle( req->handle );
}
else set_error( STATUS_INVALID_HANDLE );
}
}
/* set the current thread capture window */
DECL_HANDLER(set_capture_window)
{
struct msg_queue *queue = get_current_queue();
reply->previous = reply->full_handle = 0;
if (queue && check_queue_input_window( queue, req->handle ))
{
struct thread_input *input = queue->input;
reply->previous = input->capture;
input->capture = get_user_full_handle( req->handle );
input->menu_owner = (req->flags & CAPTURE_MENU) ? input->capture : 0;
input->move_size = (req->flags & CAPTURE_MOVESIZE) ? input->capture : 0;
reply->full_handle = input->capture;
}
}
/* Set the current thread caret window */
DECL_HANDLER(set_caret_window)
{
struct msg_queue *queue = get_current_queue();
reply->previous = 0;
if (queue && check_queue_input_window( queue, req->handle ))
{
struct thread_input *input = queue->input;
reply->previous = input->caret;
reply->old_rect = input->caret_rect;
reply->old_hide = input->caret_hide;
reply->old_state = input->caret_state;
set_caret_window( input, get_user_full_handle(req->handle) );
input->caret_rect.right = input->caret_rect.left + req->width;
input->caret_rect.bottom = input->caret_rect.top + req->height;
}
}
/* Set the current thread caret information */
DECL_HANDLER(set_caret_info)
{
struct msg_queue *queue = get_current_queue();
struct thread_input *input;
if (!queue) return;
input = queue->input;
reply->full_handle = input->caret;
reply->old_rect = input->caret_rect;
reply->old_hide = input->caret_hide;
reply->old_state = input->caret_state;
if (req->handle && get_user_full_handle(req->handle) != input->caret)
{
set_error( STATUS_ACCESS_DENIED );
return;
}
if (req->flags & SET_CARET_POS)
{
input->caret_rect.right += req->x - input->caret_rect.left;
input->caret_rect.bottom += req->y - input->caret_rect.top;
input->caret_rect.left = req->x;
input->caret_rect.top = req->y;
}
if (req->flags & SET_CARET_HIDE)
{
input->caret_hide += req->hide;
if (input->caret_hide < 0) input->caret_hide = 0;
}
if (req->flags & SET_CARET_STATE)
{
if (req->state == -1) input->caret_state = !input->caret_state;
else input->caret_state = !!req->state;
}
}
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