/* * 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA */ #include "config.h" #include "wine/port.h" #include #include #include #include #ifdef HAVE_POLL_H # include #endif #include "ntstatus.h" #define WIN32_NO_STATUS #include "windef.h" #include "winbase.h" #include "wingdi.h" #include "winuser.h" #include "winternl.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 *msg; /* message the result is for */ 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 error; /* error code to pass back to sender */ lparam_t result; /* reply result */ struct message *hardware_msg; /* hardware message if low-level hook result */ struct desktop *desktop; /* desktop for hardware message */ 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 */ lparam_t wparam; /* parameters */ lparam_t lparam; /* parameters */ int x; /* message position */ int y; unsigned int time; /* message time */ 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 */ abstime_t when; /* next expiration */ unsigned int rate; /* timer rate in ms */ user_handle_t win; /* window handle */ unsigned int msg; /* message to post */ lparam_t id; /* timer id */ lparam_t lparam; /* lparam for message */ }; struct thread_input { struct object obj; /* object header */ struct desktop *desktop; /* desktop that this thread input belongs to */ 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 */ user_handle_t cursor; /* current cursor */ int cursor_count; /* cursor show count */ struct list msg_list; /* list of hardware messages */ unsigned char keystate[256]; /* state of each key */ }; struct msg_queue { struct object obj; /* object header */ struct fd *fd; /* optional file descriptor to poll */ 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 */ int hotkey_count; /* pending hotkey messages count */ int quit_message; /* is there a pending quit message? */ int exit_code; /* exit code of pending quit message */ int cursor_count; /* per-queue cursor show 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 */ lparam_t 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 */ timeout_t last_get_msg; /* time of last get message call */ }; struct hotkey { struct list entry; /* entry in desktop hotkey list */ struct msg_queue *queue; /* queue owning this hotkey */ user_handle_t win; /* window handle */ int id; /* hotkey id */ unsigned int vkey; /* virtual key code */ unsigned int flags; /* key modifiers */ }; 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 wait_queue_entry *entry ); static void msg_queue_satisfied( struct object *obj, struct wait_queue_entry *entry ); static void msg_queue_destroy( struct object *obj ); static void msg_queue_poll_event( struct fd *fd, int event ); 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 */ &no_type, /* type */ 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_signal, /* signal */ no_get_fd, /* get_fd */ default_map_access, /* map_access */ default_get_sd, /* get_sd */ default_set_sd, /* set_sd */ no_get_full_name, /* get_full_name */ no_lookup_name, /* lookup_name */ no_link_name, /* link_name */ NULL, /* unlink_name */ no_open_file, /* open_file */ no_kernel_obj_list, /* get_kernel_obj_list */ no_close_handle, /* close_handle */ msg_queue_destroy /* destroy */ }; static const struct fd_ops msg_queue_fd_ops = { NULL, /* get_poll_events */ msg_queue_poll_event, /* poll_event */ NULL, /* flush */ NULL, /* get_fd_type */ NULL, /* ioctl */ NULL, /* queue_async */ NULL, /* reselect_async */ NULL /* cancel async */ }; static const struct object_ops thread_input_ops = { sizeof(struct thread_input), /* size */ &no_type, /* type */ thread_input_dump, /* dump */ no_add_queue, /* add_queue */ NULL, /* remove_queue */ NULL, /* signaled */ NULL, /* satisfied */ no_signal, /* signal */ no_get_fd, /* get_fd */ default_map_access, /* map_access */ default_get_sd, /* get_sd */ default_set_sd, /* set_sd */ no_get_full_name, /* get_full_name */ no_lookup_name, /* lookup_name */ no_link_name, /* link_name */ NULL, /* unlink_name */ no_open_file, /* open_file */ no_kernel_obj_list, /* get_kernel_obj_list */ no_close_handle, /* close_handle */ thread_input_destroy /* destroy */ }; /* pointer to input structure of foreground thread */ static unsigned int last_input_time; static cursor_pos_t cursor_history[64]; static unsigned int cursor_history_latest; static void queue_hardware_message( struct desktop *desktop, struct message *msg, int always_queue ); static void free_message( struct message *msg ); /* 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( struct thread *thread ) { 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; input->cursor = 0; input->cursor_count = 0; list_init( &input->msg_list ); set_caret_window( input, 0 ); memset( input->keystate, 0, sizeof(input->keystate) ); if (!(input->desktop = get_thread_desktop( thread, 0 /* FIXME: access rights */ ))) { release_object( input ); return NULL; } } return input; } /* create a message queue object */ static struct msg_queue *create_msg_queue( struct thread *thread, struct thread_input *input ) { struct thread_input *new_input = NULL; struct msg_queue *queue; int i; if (!input) { if (!(new_input = create_thread_input( thread ))) return NULL; input = new_input; } if ((queue = alloc_object( &msg_queue_ops ))) { queue->fd = NULL; queue->wake_bits = 0; queue->wake_mask = 0; queue->changed_bits = 0; queue->changed_mask = 0; queue->paint_count = 0; queue->hotkey_count = 0; queue->quit_message = 0; queue->cursor_count = 0; queue->recv_result = NULL; queue->next_timer_id = 0x7fff; queue->timeout = NULL; queue->input = (struct thread_input *)grab_object( input ); queue->hooks = NULL; queue->last_get_msg = current_time; 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 (new_input) release_object( new_input ); return queue; } /* free the message queue of a thread at thread exit */ void free_msg_queue( struct thread *thread ) { remove_thread_hooks( thread ); if (!thread->queue) return; release_object( thread->queue ); thread->queue = NULL; } /* change the thread input data of a given thread */ static int assign_thread_input( struct thread *thread, struct thread_input *new_input ) { struct msg_queue *queue = thread->queue; if (!queue) { thread->queue = create_msg_queue( thread, new_input ); return thread->queue != NULL; } if (queue->input) { queue->input->cursor_count -= queue->cursor_count; release_object( queue->input ); } queue->input = (struct thread_input *)grab_object( new_input ); new_input->cursor_count += queue->cursor_count; return 1; } /* allocate a hardware message and its data */ static struct message *alloc_hardware_message( lparam_t info, struct hw_msg_source source, unsigned int time ) { struct hardware_msg_data *msg_data; struct message *msg; if (!(msg = mem_alloc( sizeof(*msg) ))) return NULL; if (!(msg_data = mem_alloc( sizeof(*msg_data) ))) { free( msg ); return NULL; } memset( msg, 0, sizeof(*msg) ); msg->type = MSG_HARDWARE; msg->time = time; msg->data = msg_data; msg->data_size = sizeof(*msg_data); memset( msg_data, 0, sizeof(*msg_data) ); msg_data->info = info; msg_data->source = source; return msg; } static int update_desktop_cursor_pos( struct desktop *desktop, int x, int y ) { int updated; x = max( min( x, desktop->cursor.clip.right - 1 ), desktop->cursor.clip.left ); y = max( min( y, desktop->cursor.clip.bottom - 1 ), desktop->cursor.clip.top ); updated = (desktop->cursor.x != x || desktop->cursor.y != y); desktop->cursor.x = x; desktop->cursor.y = y; desktop->cursor.last_change = get_tick_count(); return updated; } /* set the cursor position and queue the corresponding mouse message */ static void set_cursor_pos( struct desktop *desktop, int x, int y ) { static const struct hw_msg_source source = { IMDT_UNAVAILABLE, IMO_SYSTEM }; const struct rawinput_device *device; struct message *msg; if ((device = current->process->rawinput_mouse) && (device->flags & RIDEV_NOLEGACY)) { update_desktop_cursor_pos( desktop, x, y ); return; } if (!(msg = alloc_hardware_message( 0, source, get_tick_count() ))) return; msg->msg = WM_MOUSEMOVE; msg->x = x; msg->y = y; queue_hardware_message( desktop, msg, 1 ); } /* retrieve default position and time for synthesized messages */ static void get_message_defaults( struct msg_queue *queue, int *x, int *y, unsigned int *time ) { struct desktop *desktop = queue->input->desktop; *x = desktop->cursor.x; *y = desktop->cursor.y; *time = get_tick_count(); } /* set the cursor clip rectangle */ static void set_clip_rectangle( struct desktop *desktop, const rectangle_t *rect, int send_clip_msg ) { rectangle_t top_rect; int x, y; get_top_window_rectangle( desktop, &top_rect ); if (rect) { rectangle_t new_rect = *rect; if (new_rect.left < top_rect.left) new_rect.left = top_rect.left; if (new_rect.right > top_rect.right) new_rect.right = top_rect.right; if (new_rect.top < top_rect.top) new_rect.top = top_rect.top; if (new_rect.bottom > top_rect.bottom) new_rect.bottom = top_rect.bottom; if (new_rect.left > new_rect.right || new_rect.top > new_rect.bottom) new_rect = top_rect; desktop->cursor.clip = new_rect; } else desktop->cursor.clip = top_rect; if (desktop->cursor.clip_msg && send_clip_msg) post_desktop_message( desktop, desktop->cursor.clip_msg, rect != NULL, 0 ); /* warp the mouse to be inside the clip rect */ x = max( min( desktop->cursor.x, desktop->cursor.clip.right - 1 ), desktop->cursor.clip.left ); y = max( min( desktop->cursor.y, desktop->cursor.clip.bottom - 1 ), desktop->cursor.clip.top ); if (x != desktop->cursor.x || y != desktop->cursor.y) set_cursor_pos( desktop, x, y ); } /* change the foreground input and reset the cursor clip rect */ static void set_foreground_input( struct desktop *desktop, struct thread_input *input ) { if (desktop->foreground_input == input) return; set_clip_rectangle( desktop, NULL, 1 ); desktop->foreground_input = input; } /* 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 ))) return; if (queue->hooks) release_object( queue->hooks ); queue->hooks = hooks; } /* check the queue status */ static inline int is_signaled( struct msg_queue *queue ) { return ((queue->wake_bits & queue->wake_mask) || (queue->changed_bits & queue->changed_mask)); } /* set some queue bits */ static inline 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 */ static inline 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 */ static inline int is_keyboard_msg( struct message *msg ) { return (msg->msg >= WM_KEYFIRST && msg->msg <= WM_KEYLAST); } /* check if message is matched by the filter */ static inline 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 */ static inline int filter_contains_hw_range( unsigned int first, unsigned int last ) { /* hardware message ranges are (in numerical order): * WM_NCMOUSEFIRST .. WM_NCMOUSELAST * WM_INPUT_DEVICE_CHANGE .. WM_KEYLAST * WM_MOUSEFIRST .. WM_MOUSELAST */ if (last < WM_NCMOUSEFIRST) return 0; if (first > WM_NCMOUSELAST && last < WM_INPUT_DEVICE_CHANGE) 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 */ static inline int get_hardware_msg_bit( struct message *msg ) { if (msg->msg == WM_INPUT_DEVICE_CHANGE || msg->msg == WM_INPUT) return QS_RAWINPUT; 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 */ static inline 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 */ static inline 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; if (msg->msg != WM_MOUSEMOVE) return 0; for (ptr = list_tail( &input->msg_list ); ptr; ptr = list_prev( &input->msg_list, ptr )) { prev = LIST_ENTRY( ptr, struct message, entry ); if (prev->msg != WM_INPUT) break; } if (!ptr) return 0; if (prev->result) return 0; if (prev->win && msg->win && 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; if (msg->type == MSG_HARDWARE && prev->data && msg->data) { struct hardware_msg_data *prev_data = prev->data; struct hardware_msg_data *msg_data = msg->data; prev_data->info = msg_data->info; } list_remove( ptr ); list_add_tail( &input->msg_list, ptr ); return 1; } /* free a result structure */ static void free_result( struct message_result *result ) { if (result->timeout) remove_timeout_user( result->timeout ); free( result->data ); if (result->callback_msg) free_message( result->callback_msg ); if (result->hardware_msg) free_message( result->hardware_msg ); if (result->desktop) release_object( result->desktop ); 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, lparam_t 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->hardware_msg) { if (!error && result) /* rejected by the hook */ free_message( res->hardware_msg ); else queue_hardware_message( res->desktop, res->hardware_msg, 0 ); res->hardware_msg = NULL; } if (res->sender) { if (res->callback_msg) { /* queue the callback message in the sender queue */ struct callback_msg_data *data = res->callback_msg->data; data->result = 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 ); } } else if (!res->receiver) free_result( res ); } /* free a message when deleting a queue or window */ static void free_message( struct message *msg ) { struct message_result *result = msg->result; if (result) { result->msg = NULL; result->receiver = NULL; store_message_result( result, 0, STATUS_ACCESS_DENIED /*FIXME*/ ); } 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] ) && !queue->quit_message) clear_queue_bits( queue, QS_POSTMESSAGE|QS_ALLPOSTMESSAGE ); if (msg->msg == WM_HOTKEY && --queue->hotkey_count == 0) clear_queue_bits( queue, QS_HOTKEY ); 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; if (result->msg) /* not received yet */ { struct message *msg = result->msg; result->msg = NULL; msg->result = NULL; remove_queue_message( result->receiver, msg, SEND_MESSAGE ); result->receiver = 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, timeout_t timeout ) { struct message_result *result = mem_alloc( sizeof(*result) ); if (result) { result->msg = msg; result->sender = send_queue; result->receiver = recv_queue; result->replied = 0; result->data = NULL; result->data_size = 0; result->timeout = NULL; result->hardware_msg = NULL; result->desktop = NULL; result->callback_msg = 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 = 0; callback_msg->lparam = 0; callback_msg->time = get_tick_count(); callback_msg->result = NULL; /* steal the data from the original message */ callback_msg->data = msg->data; callback_msg->data_size = msg->data_size; msg->data = NULL; msg->data_size = 0; result->callback_msg = callback_msg; list_add_head( &send_queue->callback_result, &result->sender_entry ); } else if (send_queue) { list_add_head( &send_queue->send_result, &result->sender_entry ); clear_queue_bits( send_queue, QS_SMRESULT ); } if (timeout != TIMEOUT_INFINITE) result->timeout = add_timeout_user( timeout, 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; 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->msg = NULL; 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, lparam_t result, unsigned int error, int remove, const void *data, 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 && !res->hardware_msg) /* 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 ); } } static int match_window( user_handle_t win, user_handle_t msg_win ) { if (!win) return 1; if (win == -1 || win == 1) return !msg_win; if (msg_win == win) return 1; return is_child_window( win, msg_win ); } /* 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 (!match_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; if (flags & PM_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; } static int get_quit_message( struct msg_queue *queue, unsigned int flags, struct get_message_reply *reply ) { if (queue->quit_message) { reply->total = 0; reply->type = MSG_POSTED; reply->win = 0; reply->msg = WM_QUIT; reply->wparam = queue->exit_code; reply->lparam = 0; get_message_defaults( queue, &reply->x, &reply->y, &reply->time ); if (flags & PM_REMOVE) { queue->quit_message = 0; if (list_empty( &queue->msg_list[POST_MESSAGE] )) clear_queue_bits( queue, QS_POSTMESSAGE|QS_ALLPOSTMESSAGE ); } return 1; } else return 0; } /* 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 wait_queue_entry *entry; if (current_time - queue->last_get_msg <= 5 * TICKS_PER_SEC) 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 (get_wait_queue_thread(entry)->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 = get_wait_queue_thread(entry)->process; /* a thread can only wait on its own queue */ if (get_wait_queue_thread(entry)->queue != queue) { set_error( STATUS_ACCESS_DENIED ); return 0; } if (process->idle_event && !(queue->wake_mask & QS_SMRESULT)) set_event( process->idle_event ); if (queue->fd && list_empty( &obj->wait_queue )) /* first on the queue */ set_fd_events( queue->fd, POLLIN ); 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; remove_queue( obj, entry ); if (queue->fd && list_empty( &obj->wait_queue )) /* last on the queue is gone */ set_fd_events( queue->fd, 0 ); } 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 wait_queue_entry *entry ) { struct msg_queue *queue = (struct msg_queue *)obj; int ret = 0; if (queue->fd) { if ((ret = check_fd_events( queue->fd, POLLIN ))) /* stop waiting on select() if we are signaled */ set_fd_events( queue->fd, 0 ); else if (!list_empty( &obj->wait_queue )) /* restart waiting on poll() if we are no longer signaled */ set_fd_events( queue->fd, POLLIN ); } return ret || is_signaled( queue ); } static void msg_queue_satisfied( struct object *obj, struct wait_queue_entry *entry ) { struct msg_queue *queue = (struct msg_queue *)obj; queue->wake_mask = 0; queue->changed_mask = 0; } static void msg_queue_destroy( struct object *obj ) { struct msg_queue *queue = (struct msg_queue *)obj; struct list *ptr; struct hotkey *hotkey, *hotkey2; int i; cleanup_results( queue ); for (i = 0; i < NB_MSG_KINDS; i++) empty_msg_list( &queue->msg_list[i] ); LIST_FOR_EACH_ENTRY_SAFE( hotkey, hotkey2, &queue->input->desktop->hotkeys, struct hotkey, entry ) { if (hotkey->queue == queue) { list_remove( &hotkey->entry ); free( hotkey ); } } 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 ); queue->input->cursor_count -= queue->cursor_count; release_object( queue->input ); if (queue->hooks) release_object( queue->hooks ); if (queue->fd) release_object( queue->fd ); } static void msg_queue_poll_event( struct fd *fd, int event ) { struct msg_queue *queue = get_fd_user( fd ); assert( queue->obj.ops == &msg_queue_ops ); if (event & (POLLERR | POLLHUP)) set_fd_events( fd, -1 ); else set_fd_events( queue->fd, 0 ); wake_up( &queue->obj, 0 ); } static void thread_input_dump( struct object *obj, int verbose ) { struct thread_input *input = (struct thread_input *)obj; fprintf( stderr, "Thread input focus=%08x capture=%08x active=%08x\n", input->focus, input->capture, input->active ); } static void thread_input_destroy( struct object *obj ) { struct thread_input *input = (struct thread_input *)obj; empty_msg_list( &input->msg_list ); if (input->desktop) { if (input->desktop->foreground_input == input) set_foreground_input( input->desktop, NULL ); release_object( input->desktop ); } } /* fix the thread input data when a window is destroyed */ static inline 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; } /* make sure the specified thread has a queue */ int init_thread_queue( struct thread *thread ) { if (thread->queue) return 1; return (create_msg_queue( thread, NULL ) != NULL); } /* attach two thread input data structures */ int attach_thread_input( struct thread *thread_from, struct thread *thread_to ) { struct desktop *desktop; struct thread_input *input; int ret; if (!thread_to->queue && !(thread_to->queue = create_msg_queue( thread_to, NULL ))) return 0; if (!(desktop = get_thread_desktop( thread_from, 0 ))) return 0; input = (struct thread_input *)grab_object( thread_to->queue->input ); if (input->desktop != desktop) { set_error( STATUS_ACCESS_DENIED ); release_object( input ); release_object( desktop ); return 0; } release_object( desktop ); if (thread_from->queue) { if (!input->focus) input->focus = thread_from->queue->input->focus; if (!input->active) input->active = thread_from->queue->input->active; } ret = assign_thread_input( thread_from, input ); if (ret) memset( input->keystate, 0, sizeof(input->keystate) ); release_object( input ); return ret; } /* detach two thread input data structures */ void detach_thread_input( struct thread *thread_from ) { struct thread *thread; struct thread_input *input, *old_input = thread_from->queue->input; if ((input = create_thread_input( thread_from ))) { if (old_input->focus && (thread = get_window_thread( old_input->focus ))) { if (thread == thread_from) { input->focus = old_input->focus; old_input->focus = 0; } release_object( thread ); } if (old_input->active && (thread = get_window_thread( old_input->active ))) { if (thread == thread_from) { input->active = old_input->active; old_input->active = 0; } release_object( thread ); } assign_thread_input( thread_from, input ); release_object( 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( abstime_to_timeout(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, lparam_t 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 (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 ) { list_remove( &timer->entry ); while (-timer->when <= monotonic_time) timer->when -= (timeout_t)timer->rate * 10000; 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 ); timer->when = -monotonic_time - (timeout_t)timer->rate * 10000; 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( unsigned char *keystate, unsigned char key, int down ) { if (down) { if (!(keystate[key] & 0x80)) keystate[key] ^= 0x01; keystate[key] |= down; } else keystate[key] &= ~0x80; } /* update the input key state for a keyboard message */ static void update_input_key_state( struct desktop *desktop, unsigned char *keystate, unsigned int msg, lparam_t wparam ) { unsigned char key; int down = 0; switch (msg) { case WM_LBUTTONDOWN: down = (keystate == desktop->keystate) ? 0xc0 : 0x80; /* fall through */ case WM_LBUTTONUP: set_input_key_state( keystate, VK_LBUTTON, down ); break; case WM_MBUTTONDOWN: down = (keystate == desktop->keystate) ? 0xc0 : 0x80; /* fall through */ case WM_MBUTTONUP: set_input_key_state( keystate, VK_MBUTTON, down ); break; case WM_RBUTTONDOWN: down = (keystate == desktop->keystate) ? 0xc0 : 0x80; /* fall through */ case WM_RBUTTONUP: set_input_key_state( keystate, VK_RBUTTON, down ); break; case WM_XBUTTONDOWN: down = (keystate == desktop->keystate) ? 0xc0 : 0x80; /* fall through */ case WM_XBUTTONUP: if (wparam >> 16 == XBUTTON1) set_input_key_state( keystate, VK_XBUTTON1, down ); else if (wparam >> 16 == XBUTTON2) set_input_key_state( keystate, VK_XBUTTON2, down ); break; case WM_KEYDOWN: case WM_SYSKEYDOWN: down = (keystate == desktop->keystate) ? 0xc0 : 0x80; /* fall through */ case WM_KEYUP: case WM_SYSKEYUP: key = (unsigned char)wparam; set_input_key_state( keystate, key, down ); switch(key) { case VK_LCONTROL: case VK_RCONTROL: down = (keystate[VK_LCONTROL] | keystate[VK_RCONTROL]) & 0x80; set_input_key_state( keystate, VK_CONTROL, down ); break; case VK_LMENU: case VK_RMENU: down = (keystate[VK_LMENU] | keystate[VK_RMENU]) & 0x80; set_input_key_state( keystate, VK_MENU, down ); break; case VK_LSHIFT: case VK_RSHIFT: down = (keystate[VK_LSHIFT] | keystate[VK_RSHIFT]) & 0x80; set_input_key_state( keystate, VK_SHIFT, down ); break; } break; } } /* update the desktop key state according to a mouse message flags */ static void update_desktop_mouse_state( struct desktop *desktop, unsigned int flags, int x, int y, lparam_t wparam ) { if (flags & MOUSEEVENTF_MOVE) update_desktop_cursor_pos( desktop, x, y ); if (flags & MOUSEEVENTF_LEFTDOWN) update_input_key_state( desktop, desktop->keystate, WM_LBUTTONDOWN, wparam ); if (flags & MOUSEEVENTF_LEFTUP) update_input_key_state( desktop, desktop->keystate, WM_LBUTTONUP, wparam ); if (flags & MOUSEEVENTF_RIGHTDOWN) update_input_key_state( desktop, desktop->keystate, WM_RBUTTONDOWN, wparam ); if (flags & MOUSEEVENTF_RIGHTUP) update_input_key_state( desktop, desktop->keystate, WM_RBUTTONUP, wparam ); if (flags & MOUSEEVENTF_MIDDLEDOWN) update_input_key_state( desktop, desktop->keystate, WM_MBUTTONDOWN, wparam ); if (flags & MOUSEEVENTF_MIDDLEUP) update_input_key_state( desktop, desktop->keystate, WM_MBUTTONUP, wparam ); if (flags & MOUSEEVENTF_XDOWN) update_input_key_state( desktop, desktop->keystate, WM_XBUTTONDOWN, wparam ); if (flags & MOUSEEVENTF_XUP) update_input_key_state( desktop, desktop->keystate, WM_XBUTTONUP, wparam ); } /* release the hardware message currently being processed by the given thread */ static void release_hardware_message( struct msg_queue *queue, unsigned int hw_id ) { struct thread_input *input = queue->input; struct message *msg, *other; int clr_bit; 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 */ 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 ); update_input_key_state( input->desktop, input->keystate, msg->msg, msg->wparam ); list_remove( &msg->entry ); free_message( msg ); } static int queue_hotkey_message( struct desktop *desktop, struct message *msg ) { struct hotkey *hotkey; unsigned int modifiers = 0; if (msg->msg != WM_KEYDOWN) return 0; if (desktop->keystate[VK_MENU] & 0x80) modifiers |= MOD_ALT; if (desktop->keystate[VK_CONTROL] & 0x80) modifiers |= MOD_CONTROL; if (desktop->keystate[VK_SHIFT] & 0x80) modifiers |= MOD_SHIFT; if ((desktop->keystate[VK_LWIN] & 0x80) || (desktop->keystate[VK_RWIN] & 0x80)) modifiers |= MOD_WIN; LIST_FOR_EACH_ENTRY( hotkey, &desktop->hotkeys, struct hotkey, entry ) { if (hotkey->vkey != msg->wparam) continue; if ((hotkey->flags & (MOD_ALT|MOD_CONTROL|MOD_SHIFT|MOD_WIN)) == modifiers) goto found; } return 0; found: msg->type = MSG_POSTED; msg->win = hotkey->win; msg->msg = WM_HOTKEY; msg->wparam = hotkey->id; msg->lparam = ((hotkey->vkey & 0xffff) << 16) | modifiers; free( msg->data ); msg->data = NULL; msg->data_size = 0; list_add_tail( &hotkey->queue->msg_list[POST_MESSAGE], &msg->entry ); set_queue_bits( hotkey->queue, QS_POSTMESSAGE|QS_ALLPOSTMESSAGE|QS_HOTKEY ); hotkey->queue->hotkey_count++; return 1; } /* find the window that should receive a given hardware message */ static user_handle_t find_hardware_message_window( struct desktop *desktop, struct thread_input *input, struct message *msg, unsigned int *msg_code, struct thread **thread ) { user_handle_t win = 0; *thread = NULL; *msg_code = msg->msg; if (msg->msg == WM_INPUT || msg->msg == WM_INPUT_DEVICE_CHANGE) { if (!(win = msg->win) && input) win = input->focus; } else 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 if (!input || !(win = input->capture)) /* mouse message */ { if (is_window_visible( msg->win ) && !is_window_transparent( msg->win )) win = msg->win; else win = shallow_window_from_point( desktop, msg->x, msg->y ); *thread = window_thread_from_point( win, msg->x, msg->y ); } if (!*thread) *thread = get_window_thread( win ); return win; } static struct rawinput_device_entry *find_rawinput_device( struct process *process, unsigned short usage_page, unsigned short usage ) { struct rawinput_device_entry *e; LIST_FOR_EACH_ENTRY( e, &process->rawinput_devices, struct rawinput_device_entry, entry ) { if (e->device.usage_page != usage_page || e->device.usage != usage) continue; return e; } return NULL; } static void update_rawinput_device(const struct rawinput_device *device) { struct rawinput_device_entry *e; if (!(e = find_rawinput_device( current->process, device->usage_page, device->usage ))) { if (!(e = mem_alloc( sizeof(*e) ))) return; list_add_tail( ¤t->process->rawinput_devices, &e->entry ); } if (device->flags & RIDEV_REMOVE) { list_remove( &e->entry ); free( e ); return; } e->device = *device; e->device.target = get_user_full_handle( e->device.target ); } static void prepend_cursor_history( int x, int y, unsigned int time, lparam_t info ) { cursor_pos_t *pos = &cursor_history[--cursor_history_latest % ARRAY_SIZE(cursor_history)]; pos->x = x; pos->y = y; pos->time = time; pos->info = info; } /* queue a hardware message into a given thread input */ static void queue_hardware_message( struct desktop *desktop, struct message *msg, int always_queue ) { user_handle_t win; struct thread *thread; struct thread_input *input; struct hardware_msg_data *msg_data = msg->data; unsigned int msg_code; update_input_key_state( desktop, desktop->keystate, msg->msg, msg->wparam ); last_input_time = get_tick_count(); if (msg->msg != WM_MOUSEMOVE) always_queue = 1; if (is_keyboard_msg( msg )) { if (queue_hotkey_message( desktop, msg )) return; if (desktop->keystate[VK_MENU] & 0x80) msg->lparam |= KF_ALTDOWN << 16; if (msg->wparam == VK_SHIFT || msg->wparam == VK_LSHIFT || msg->wparam == VK_RSHIFT) msg->lparam &= ~(KF_EXTENDED << 16); } else if (msg->msg != WM_INPUT && msg->msg != WM_INPUT_DEVICE_CHANGE) { if (msg->msg == WM_MOUSEMOVE) { prepend_cursor_history( msg->x, msg->y, msg->time, msg_data->info ); if (update_desktop_cursor_pos( desktop, msg->x, msg->y )) always_queue = 1; } if (desktop->keystate[VK_LBUTTON] & 0x80) msg->wparam |= MK_LBUTTON; if (desktop->keystate[VK_MBUTTON] & 0x80) msg->wparam |= MK_MBUTTON; if (desktop->keystate[VK_RBUTTON] & 0x80) msg->wparam |= MK_RBUTTON; if (desktop->keystate[VK_SHIFT] & 0x80) msg->wparam |= MK_SHIFT; if (desktop->keystate[VK_CONTROL] & 0x80) msg->wparam |= MK_CONTROL; if (desktop->keystate[VK_XBUTTON1] & 0x80) msg->wparam |= MK_XBUTTON1; if (desktop->keystate[VK_XBUTTON2] & 0x80) msg->wparam |= MK_XBUTTON2; } msg->x = desktop->cursor.x; msg->y = desktop->cursor.y; if (msg->win && (thread = get_window_thread( msg->win ))) { input = thread->queue->input; release_object( thread ); } else input = desktop->foreground_input; win = find_hardware_message_window( desktop, input, msg, &msg_code, &thread ); if (!win || !thread) { if (input) update_input_key_state( input->desktop, input->keystate, msg->msg, msg->wparam ); free_message( msg ); return; } input = thread->queue->input; if (win != desktop->cursor.win) always_queue = 1; desktop->cursor.win = win; if (!always_queue || merge_message( input, msg )) free_message( 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 ); } /* send the low-level hook message for a given hardware message */ static int send_hook_ll_message( struct desktop *desktop, struct message *hardware_msg, const hw_input_t *input, struct msg_queue *sender ) { struct thread *hook_thread; struct msg_queue *queue; struct message *msg; timeout_t timeout = 2000 * -10000; /* FIXME: load from registry */ int id = (input->type == INPUT_MOUSE) ? WH_MOUSE_LL : WH_KEYBOARD_LL; if (!(hook_thread = get_first_global_hook( id ))) return 0; if (!(queue = hook_thread->queue)) return 0; if (is_queue_hung( queue )) return 0; if (!(msg = mem_alloc( sizeof(*msg) ))) return 0; msg->type = MSG_HOOK_LL; msg->win = 0; msg->msg = id; msg->wparam = hardware_msg->msg; msg->x = hardware_msg->x; msg->y = hardware_msg->y; msg->time = hardware_msg->time; msg->data_size = hardware_msg->data_size; msg->result = NULL; if (input->type == INPUT_KEYBOARD) { unsigned short vkey = input->kbd.vkey; if (input->kbd.flags & KEYEVENTF_UNICODE) vkey = VK_PACKET; msg->lparam = (input->kbd.scan << 16) | vkey; } else msg->lparam = input->mouse.data << 16; if (!(msg->data = memdup( hardware_msg->data, hardware_msg->data_size )) || !(msg->result = alloc_message_result( sender, queue, msg, timeout ))) { free_message( msg ); return 0; } msg->result->hardware_msg = hardware_msg; msg->result->desktop = (struct desktop *)grab_object( desktop ); list_add_tail( &queue->msg_list[SEND_MESSAGE], &msg->entry ); set_queue_bits( queue, QS_SENDMESSAGE ); return 1; } /* get the foreground thread for a desktop and a window receiving input */ static struct thread *get_foreground_thread( struct desktop *desktop, user_handle_t window ) { /* if desktop has no foreground process, assume the receiving window is */ if (desktop->foreground_input) return get_window_thread( desktop->foreground_input->focus ); if (window) return get_window_thread( window ); return NULL; } struct rawinput_message { struct thread *foreground; struct desktop *desktop; struct hw_msg_source source; unsigned int time; unsigned int message; struct hardware_msg_data data; }; /* check if process is supposed to receive a WM_INPUT message and eventually queue it */ static int queue_rawinput_message( struct process* process, void *arg ) { const struct rawinput_message* raw_msg = arg; const struct rawinput_device_entry *entry; const struct rawinput_device *device = NULL; struct desktop *target_desktop = NULL, *desktop = NULL; struct thread *target_thread = NULL, *foreground = NULL; struct message *msg; int wparam = RIM_INPUT; if (raw_msg->data.rawinput.type == RIM_TYPEMOUSE) device = process->rawinput_mouse; else if (raw_msg->data.rawinput.type == RIM_TYPEKEYBOARD) device = process->rawinput_kbd; else if ((entry = find_rawinput_device( process, raw_msg->data.rawinput.hid.usage_page, raw_msg->data.rawinput.hid.usage ))) device = &entry->device; if (!device) return 0; if (raw_msg->message == WM_INPUT_DEVICE_CHANGE && !(device->flags & RIDEV_DEVNOTIFY)) return 0; if (raw_msg->desktop) desktop = (struct desktop *)grab_object( raw_msg->desktop ); else if (!(desktop = get_desktop_obj( process, process->desktop, 0 ))) goto done; if (raw_msg->foreground) foreground = (struct thread *)grab_object( raw_msg->foreground ); else if (!(foreground = get_foreground_thread( desktop, 0 ))) goto done; if (process != foreground->process) { if (raw_msg->message == WM_INPUT && !(device->flags & RIDEV_INPUTSINK)) goto done; if (!(target_thread = get_window_thread( device->target ))) goto done; if (!(target_desktop = get_thread_desktop( target_thread, 0 ))) goto done; if (target_desktop != desktop) goto done; wparam = RIM_INPUTSINK; } if (!(msg = alloc_hardware_message( raw_msg->data.info, raw_msg->source, raw_msg->time ))) goto done; msg->win = device->target; msg->msg = raw_msg->message; msg->wparam = wparam; msg->lparam = 0; memcpy( msg->data, &raw_msg->data, sizeof(raw_msg->data) ); if (raw_msg->message == WM_INPUT_DEVICE_CHANGE && raw_msg->data.rawinput.type == RIM_TYPEHID) { msg->wparam = raw_msg->data.rawinput.hid.param; msg->lparam = raw_msg->data.rawinput.hid.device; } queue_hardware_message( desktop, msg, 1 ); done: if (target_thread) release_object( target_thread ); if (target_desktop) release_object( target_desktop ); if (foreground) release_object( foreground ); if (desktop) release_object( desktop ); return 0; } /* queue a hardware message for a mouse event */ static int queue_mouse_message( struct desktop *desktop, user_handle_t win, const hw_input_t *input, unsigned int origin, struct msg_queue *sender ) { const struct rawinput_device *device; struct hardware_msg_data *msg_data; struct rawinput_message raw_msg; struct message *msg; struct thread *foreground; unsigned int i, time, flags; struct hw_msg_source source = { IMDT_MOUSE, origin }; int wait = 0, x, y; static const unsigned int messages[] = { WM_MOUSEMOVE, /* 0x0001 = MOUSEEVENTF_MOVE */ WM_LBUTTONDOWN, /* 0x0002 = MOUSEEVENTF_LEFTDOWN */ WM_LBUTTONUP, /* 0x0004 = MOUSEEVENTF_LEFTUP */ WM_RBUTTONDOWN, /* 0x0008 = MOUSEEVENTF_RIGHTDOWN */ WM_RBUTTONUP, /* 0x0010 = MOUSEEVENTF_RIGHTUP */ WM_MBUTTONDOWN, /* 0x0020 = MOUSEEVENTF_MIDDLEDOWN */ WM_MBUTTONUP, /* 0x0040 = MOUSEEVENTF_MIDDLEUP */ WM_XBUTTONDOWN, /* 0x0080 = MOUSEEVENTF_XDOWN */ WM_XBUTTONUP, /* 0x0100 = MOUSEEVENTF_XUP */ 0, /* 0x0200 = unused */ 0, /* 0x0400 = unused */ WM_MOUSEWHEEL, /* 0x0800 = MOUSEEVENTF_WHEEL */ WM_MOUSEHWHEEL /* 0x1000 = MOUSEEVENTF_HWHEEL */ }; desktop->cursor.last_change = get_tick_count(); flags = input->mouse.flags; time = input->mouse.time; if (!time) time = desktop->cursor.last_change; if (flags & MOUSEEVENTF_MOVE) { if (flags & MOUSEEVENTF_ABSOLUTE) { x = input->mouse.x; y = input->mouse.y; if (flags & ~(MOUSEEVENTF_MOVE | MOUSEEVENTF_ABSOLUTE) && x == desktop->cursor.x && y == desktop->cursor.y) flags &= ~MOUSEEVENTF_MOVE; } else { x = desktop->cursor.x + input->mouse.x; y = desktop->cursor.y + input->mouse.y; } } else { x = desktop->cursor.x; y = desktop->cursor.y; } if ((foreground = get_foreground_thread( desktop, win ))) { raw_msg.foreground = foreground; raw_msg.desktop = desktop; raw_msg.source = source; raw_msg.time = time; raw_msg.message = WM_INPUT; msg_data = &raw_msg.data; msg_data->info = input->mouse.info; msg_data->flags = flags; msg_data->rawinput.type = RIM_TYPEMOUSE; msg_data->rawinput.mouse.x = x - desktop->cursor.x; msg_data->rawinput.mouse.y = y - desktop->cursor.y; msg_data->rawinput.mouse.data = input->mouse.data; enum_processes( queue_rawinput_message, &raw_msg ); release_object( foreground ); } if ((device = current->process->rawinput_mouse) && (device->flags & RIDEV_NOLEGACY)) { update_desktop_mouse_state( desktop, flags, x, y, input->mouse.data << 16 ); return 0; } for (i = 0; i < ARRAY_SIZE( messages ); i++) { if (!messages[i]) continue; if (!(flags & (1 << i))) continue; flags &= ~(1 << i); if (!(msg = alloc_hardware_message( input->mouse.info, source, time ))) return 0; msg_data = msg->data; msg->win = get_user_full_handle( win ); msg->msg = messages[i]; msg->wparam = input->mouse.data << 16; msg->lparam = 0; msg->x = x; msg->y = y; if (origin == IMO_INJECTED) msg_data->flags = LLMHF_INJECTED; /* specify a sender only when sending the last message */ if (!(flags & ((1 << ARRAY_SIZE( messages )) - 1))) { if (!(wait = send_hook_ll_message( desktop, msg, input, sender ))) queue_hardware_message( desktop, msg, 0 ); } else if (!send_hook_ll_message( desktop, msg, input, NULL )) queue_hardware_message( desktop, msg, 0 ); } return wait; } /* queue a hardware message for a keyboard event */ static int queue_keyboard_message( struct desktop *desktop, user_handle_t win, const hw_input_t *input, unsigned int origin, struct msg_queue *sender ) { struct hw_msg_source source = { IMDT_KEYBOARD, origin }; const struct rawinput_device *device; struct hardware_msg_data *msg_data; struct rawinput_message raw_msg; struct message *msg; struct thread *foreground; unsigned char vkey = input->kbd.vkey; unsigned int message_code, time; int wait; if (!(time = input->kbd.time)) time = get_tick_count(); if (!(input->kbd.flags & KEYEVENTF_UNICODE)) { switch (vkey) { case VK_MENU: case VK_LMENU: case VK_RMENU: vkey = (input->kbd.flags & KEYEVENTF_EXTENDEDKEY) ? VK_RMENU : VK_LMENU; break; case VK_CONTROL: case VK_LCONTROL: case VK_RCONTROL: vkey = (input->kbd.flags & KEYEVENTF_EXTENDEDKEY) ? VK_RCONTROL : VK_LCONTROL; break; case VK_SHIFT: case VK_LSHIFT: case VK_RSHIFT: vkey = (input->kbd.flags & KEYEVENTF_EXTENDEDKEY) ? VK_RSHIFT : VK_LSHIFT; break; } } message_code = (input->kbd.flags & KEYEVENTF_KEYUP) ? WM_KEYUP : WM_KEYDOWN; switch (vkey) { case VK_LMENU: case VK_RMENU: if (input->kbd.flags & KEYEVENTF_KEYUP) { /* send WM_SYSKEYUP if Alt still pressed and no other key in between */ /* we use 0x02 as a flag to track if some other SYSKEYUP was sent already */ if ((desktop->keystate[VK_MENU] & 0x82) != 0x82) break; message_code = WM_SYSKEYUP; desktop->keystate[VK_MENU] &= ~0x02; } else { /* send WM_SYSKEYDOWN for Alt except with Ctrl */ if (desktop->keystate[VK_CONTROL] & 0x80) break; message_code = WM_SYSKEYDOWN; desktop->keystate[VK_MENU] |= 0x02; } break; case VK_LCONTROL: case VK_RCONTROL: /* send WM_SYSKEYUP on release if Alt still pressed */ if (!(input->kbd.flags & KEYEVENTF_KEYUP)) break; if (!(desktop->keystate[VK_MENU] & 0x80)) break; message_code = WM_SYSKEYUP; desktop->keystate[VK_MENU] &= ~0x02; break; default: /* send WM_SYSKEY for Alt-anykey and for F10 */ if (desktop->keystate[VK_CONTROL] & 0x80) break; if (!(desktop->keystate[VK_MENU] & 0x80)) break; /* fall through */ case VK_F10: message_code = (input->kbd.flags & KEYEVENTF_KEYUP) ? WM_SYSKEYUP : WM_SYSKEYDOWN; desktop->keystate[VK_MENU] &= ~0x02; break; } if ((foreground = get_foreground_thread( desktop, win ))) { raw_msg.foreground = foreground; raw_msg.desktop = desktop; raw_msg.source = source; raw_msg.time = time; raw_msg.message = WM_INPUT; msg_data = &raw_msg.data; msg_data->info = input->kbd.info; msg_data->flags = input->kbd.flags; msg_data->rawinput.type = RIM_TYPEKEYBOARD; msg_data->rawinput.kbd.message = message_code; msg_data->rawinput.kbd.vkey = vkey; msg_data->rawinput.kbd.scan = input->kbd.scan; enum_processes( queue_rawinput_message, &raw_msg ); release_object( foreground ); } if ((device = current->process->rawinput_kbd) && (device->flags & RIDEV_NOLEGACY)) { update_input_key_state( desktop, desktop->keystate, message_code, vkey ); return 0; } if (!(msg = alloc_hardware_message( input->kbd.info, source, time ))) return 0; msg_data = msg->data; msg->win = get_user_full_handle( win ); msg->msg = message_code; msg->lparam = (input->kbd.scan << 16) | 1u; /* repeat count */ if (origin == IMO_INJECTED) msg_data->flags = LLKHF_INJECTED; if (input->kbd.flags & KEYEVENTF_UNICODE && !vkey) { msg->wparam = VK_PACKET; } else { unsigned int flags = 0; if (input->kbd.flags & KEYEVENTF_EXTENDEDKEY) flags |= KF_EXTENDED; /* FIXME: set KF_DLGMODE and KF_MENUMODE when needed */ if (input->kbd.flags & KEYEVENTF_KEYUP) flags |= KF_REPEAT | KF_UP; else if (desktop->keystate[vkey] & 0x80) flags |= KF_REPEAT; msg->wparam = vkey; msg->lparam |= flags << 16; msg_data->flags |= (flags & (KF_EXTENDED | KF_ALTDOWN | KF_UP)) >> 8; } if (!(wait = send_hook_ll_message( desktop, msg, input, sender ))) queue_hardware_message( desktop, msg, 1 ); return wait; } /* queue a hardware message for a custom type of event */ static void queue_custom_hardware_message( struct desktop *desktop, user_handle_t win, unsigned int origin, const hw_input_t *input ) { struct hw_msg_source source = { IMDT_UNAVAILABLE, origin }; struct hardware_msg_data *msg_data; struct rawinput_message raw_msg; struct message *msg; switch (input->hw.msg) { case WM_INPUT_DEVICE_CHANGE: raw_msg.foreground = NULL; raw_msg.desktop = NULL; raw_msg.source = source; raw_msg.time = get_tick_count(); raw_msg.message = input->hw.msg; msg_data = &raw_msg.data; msg_data->info = 0; msg_data->flags = 0; msg_data->rawinput = input->hw.rawinput; enum_processes( queue_rawinput_message, &raw_msg ); if (raw_msg.foreground) release_object( raw_msg.foreground ); return; } if (!(msg = alloc_hardware_message( 0, source, get_tick_count() ))) return; msg->win = get_user_full_handle( win ); msg->msg = input->hw.msg; msg->wparam = 0; msg->lparam = input->hw.lparam; msg->x = desktop->cursor.x; msg->y = desktop->cursor.y; queue_hardware_message( desktop, msg, 1 ); } /* 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, unsigned int hw_id, user_handle_t filter_win, unsigned int first, unsigned int last, unsigned int flags, 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_INPUT; 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 ); struct hardware_msg_data *data = msg->data; ptr = list_next( &input->msg_list, ptr ); win = find_hardware_message_window( input->desktop, input, msg, &msg_code, &win_thread ); if (!win || !win_thread) { /* no window at all, remove it */ update_input_key_state( input->desktop, input->keystate, msg->msg, msg->wparam ); list_remove( &msg->entry ); free_message( msg ); continue; } if (win_thread != thread) { if (win_thread->queue->input == input) { /* wake the other thread */ set_queue_bits( win_thread->queue, get_hardware_msg_bit(msg) ); got_one = 1; } else { /* for another thread input, drop it */ update_input_key_state( input->desktop, input->keystate, msg->msg, msg->wparam ); list_remove( &msg->entry ); free_message( msg ); } release_object( win_thread ); 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 ); 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; data->hw_id = msg->unique_id; set_reply_data( msg->data, msg->data_size ); if ((msg->msg == WM_INPUT || msg->msg == WM_INPUT_DEVICE_CHANGE) && (flags & PM_REMOVE)) release_hardware_message( current->queue, data->hw_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) { if (msg->msg == WM_QUIT && !queue->quit_message) { queue->quit_message = 1; queue->exit_code = msg->wparam; } remove_queue_message( queue, msg, i ); } } } thread_input_cleanup_window( queue, win ); } /* post a message to a window */ void post_message( user_handle_t win, unsigned int message, lparam_t wparam, lparam_t 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->result = NULL; msg->data = NULL; msg->data_size = 0; get_message_defaults( thread->queue, &msg->x, &msg->y, &msg->time ); list_add_tail( &thread->queue->msg_list[POST_MESSAGE], &msg->entry ); set_queue_bits( thread->queue, QS_POSTMESSAGE|QS_ALLPOSTMESSAGE ); if (message == WM_HOTKEY) { set_queue_bits( thread->queue, QS_HOTKEY ); thread->queue->hotkey_count++; } } release_object( thread ); } /* send a notify message to a window */ void send_notify_message( user_handle_t win, unsigned int message, lparam_t wparam, lparam_t 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_NOTIFY; msg->win = get_user_full_handle( win ); msg->msg = message; msg->wparam = wparam; msg->lparam = lparam; msg->result = NULL; msg->data = NULL; msg->data_size = 0; get_message_defaults( thread->queue, &msg->x, &msg->y, &msg->time ); list_add_tail( &thread->queue->msg_list[SEND_MESSAGE], &msg->entry ); set_queue_bits( thread->queue, QS_SENDMESSAGE ); } 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, client_ptr_t hook_proc, const WCHAR *module, data_size_t module_size, user_handle_t hook) { struct message *msg; if (thread->queue && (msg = mem_alloc( sizeof(*msg) ))) { struct winevent_msg_data *data; 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->result = NULL; if ((data = malloc( sizeof(*data) + module_size ))) { data->hook = hook; data->tid = get_thread_id( current ); data->hook_proc = hook_proc; memcpy( data + 1, module, module_size ); msg->data = data; msg->data_size = sizeof(*data) + module_size; if (debug_level > 1) fprintf( stderr, "post_win_event: tid %04x event %04x win %08x 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 ); } } /* free all hotkeys on a desktop, optionally filtering by window */ void free_hotkeys( struct desktop *desktop, user_handle_t window ) { struct hotkey *hotkey, *hotkey2; LIST_FOR_EACH_ENTRY_SAFE( hotkey, hotkey2, &desktop->hotkeys, struct hotkey, entry ) { if (!window || hotkey->win == window) { list_remove( &hotkey->entry ); free( hotkey ); } } } /* check if the thread owning the window is hung */ DECL_HANDLER(is_window_hung) { struct thread *thread; thread = get_window_thread( req->win ); if (thread) { reply->is_hung = is_queue_hung( thread->queue ); release_object( thread ); } else reply->is_hung = 0; } /* 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 file descriptor associated to the current thread queue */ DECL_HANDLER(set_queue_fd) { struct msg_queue *queue = get_current_queue(); struct file *file; int unix_fd; if (queue->fd) /* fd can only be set once */ { set_error( STATUS_ACCESS_DENIED ); return; } if (!(file = get_file_obj( current->process, req->handle, SYNCHRONIZE ))) return; if ((unix_fd = get_file_unix_fd( file )) != -1) { if ((unix_fd = dup( unix_fd )) != -1) queue->fd = create_anonymous_fd( &msg_queue_fd_ops, unix_fd, &queue->obj, 0 ); else file_set_error(); } release_object( file ); } /* 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) queue->wake_mask = queue->changed_mask = 0; 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; queue->changed_bits &= ~req->clear_bits; } 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 (!(thread = get_thread_from_id( req->id ))) return; if (!(recv_queue = thread->queue)) { set_error( STATUS_INVALID_PARAMETER ); release_object( thread ); return; } if ((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->result = NULL; msg->data = NULL; msg->data_size = get_req_data_size(); get_message_defaults( recv_queue, &msg->x, &msg->y, &msg->time ); if (msg->data_size && !(msg->data = memdup( get_req_data(), msg->data_size ))) { free( msg ); release_object( thread ); return; } switch(msg->type) { case MSG_OTHER_PROCESS: case MSG_ASCII: case MSG_UNICODE: case MSG_CALLBACK: if (!(msg->result = alloc_message_result( send_queue, recv_queue, msg, req->timeout ))) { 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: list_add_tail( &recv_queue->msg_list[POST_MESSAGE], &msg->entry ); set_queue_bits( recv_queue, QS_POSTMESSAGE|QS_ALLPOSTMESSAGE ); if (msg->msg == WM_HOTKEY) { set_queue_bits( recv_queue, QS_HOTKEY ); recv_queue->hotkey_count++; } break; case MSG_HARDWARE: /* should use send_hardware_message instead */ case MSG_CALLBACK_RESULT: /* cannot send this one */ case MSG_HOOK_LL: /* generated internally */ default: set_error( STATUS_INVALID_PARAMETER ); free( msg ); break; } } release_object( thread ); } /* send a hardware message to a thread queue */ DECL_HANDLER(send_hardware_message) { struct thread *thread = NULL; struct desktop *desktop; unsigned int origin = (req->flags & SEND_HWMSG_INJECTED ? IMO_INJECTED : IMO_HARDWARE); struct msg_queue *sender = get_current_queue(); data_size_t size = min( 256, get_reply_max_size() ); if (!(desktop = get_thread_desktop( current, 0 ))) return; if (req->win) { if (!(thread = get_window_thread( req->win ))) return; if (desktop != thread->queue->input->desktop) { /* don't allow queuing events to a different desktop */ release_object( desktop ); return; } } reply->prev_x = desktop->cursor.x; reply->prev_y = desktop->cursor.y; switch (req->input.type) { case INPUT_MOUSE: reply->wait = queue_mouse_message( desktop, req->win, &req->input, origin, sender ); break; case INPUT_KEYBOARD: reply->wait = queue_keyboard_message( desktop, req->win, &req->input, origin, sender ); break; case INPUT_HARDWARE: queue_custom_hardware_message( desktop, req->win, origin, &req->input ); break; default: set_error( STATUS_INVALID_PARAMETER ); } if (thread) release_object( thread ); reply->new_x = desktop->cursor.x; reply->new_y = desktop->cursor.y; set_reply_data( desktop->keystate, size ); release_object( desktop ); } /* post a quit message to the current queue */ DECL_HANDLER(post_quit_message) { struct msg_queue *queue = get_current_queue(); if (!queue) return; queue->quit_message = 1; queue->exit_code = req->exit_code; set_queue_bits( queue, QS_POSTMESSAGE|QS_ALLPOSTMESSAGE ); } /* 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 ); unsigned int filter = req->flags >> 16; reply->active_hooks = get_active_hooks(); if (get_win && get_win != 1 && get_win != -1 && !get_user_object( get_win, USER_WINDOW )) { set_win32_error( ERROR_INVALID_WINDOW_HANDLE ); return; } if (!queue) return; queue->last_get_msg = current_time; if (!filter) filter = QS_ALLINPUT; /* 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; } /* clear changed bits so we can wait on them if we don't find a message */ if (filter & QS_POSTMESSAGE) { queue->changed_bits &= ~(QS_POSTMESSAGE | QS_HOTKEY | QS_TIMER); if (req->get_first == 0 && req->get_last == ~0U) queue->changed_bits &= ~QS_ALLPOSTMESSAGE; } if (filter & QS_INPUT) queue->changed_bits &= ~QS_INPUT; if (filter & QS_PAINT) queue->changed_bits &= ~QS_PAINT; /* then check for posted messages */ if ((filter & QS_POSTMESSAGE) && get_posted_message( queue, get_win, req->get_first, req->get_last, req->flags, reply )) return; if ((filter & QS_HOTKEY) && queue->hotkey_count && req->get_first <= WM_HOTKEY && req->get_last >= WM_HOTKEY && get_posted_message( queue, get_win, WM_HOTKEY, WM_HOTKEY, req->flags, reply )) return; /* only check for quit messages if not posted messages pending */ if ((filter & QS_POSTMESSAGE) && get_quit_message( queue, req->flags, reply )) return; /* then check for any raw hardware message */ if ((filter & QS_INPUT) && 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, req->flags, reply )) return; /* now check for WM_PAINT */ if ((filter & QS_PAINT) && 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; get_message_defaults( queue, &reply->x, &reply->y, &reply->time ); return; } /* now check for timer */ if ((filter & QS_TIMER) && (timer = find_expired_timer( queue, get_win, req->get_first, req->get_last, (req->flags & PM_REMOVE) ))) { reply->type = MSG_POSTED; reply->win = timer->win; reply->msg = timer->msg; reply->wparam = timer->id; reply->lparam = timer->lparam; get_message_defaults( queue, &reply->x, &reply->y, &reply->time ); if (!(req->flags & PM_NOYIELD) && current->process->idle_event) set_event( current->process->idle_event ); return; } if (get_win == -1 && current->process->idle_event) set_event( current->process->idle_event ); queue->wake_mask = req->wake_mask; queue->changed_mask = req->changed_mask; 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 ); 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) { 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) set_queue_bits( queue, QS_SMRESULT ); else 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; lparam_t 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(); /* look for a timer with this id */ if (id && (timer = find_timer( queue, 0, req->msg, id ))) { /* free and reuse id */ free_timer( queue, timer ); } else { lparam_t end_id = queue->next_timer_id; /* find a free id for it */ while (1) { id = queue->next_timer_id; if (--queue->next_timer_id <= 0x100) queue->next_timer_id = 0x7fff; if (!find_timer( queue, 0, req->msg, id )) break; if (queue->next_timer_id == end_id) { set_win32_error( ERROR_NO_MORE_USER_HANDLES ); return; } } } } 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 ); } DECL_HANDLER(register_hotkey) { struct desktop *desktop; user_handle_t win_handle = req->window; struct hotkey *hotkey; struct hotkey *new_hotkey = NULL; struct thread *thread; const int modifier_flags = MOD_ALT|MOD_CONTROL|MOD_SHIFT|MOD_WIN; if (!(desktop = get_thread_desktop( current, 0 ))) return; if (win_handle) { if (!(win_handle = get_valid_window_handle( win_handle ))) { release_object( desktop ); return; } thread = get_window_thread( win_handle ); if (thread) release_object( thread ); if (thread != current) { release_object( desktop ); set_win32_error( ERROR_WINDOW_OF_OTHER_THREAD ); return; } } LIST_FOR_EACH_ENTRY( hotkey, &desktop->hotkeys, struct hotkey, entry ) { if (req->vkey == hotkey->vkey && (req->flags & modifier_flags) == (hotkey->flags & modifier_flags)) { release_object( desktop ); set_win32_error( ERROR_HOTKEY_ALREADY_REGISTERED ); return; } if (current->queue == hotkey->queue && win_handle == hotkey->win && req->id == hotkey->id) new_hotkey = hotkey; } if (new_hotkey) { reply->replaced = 1; reply->flags = new_hotkey->flags; reply->vkey = new_hotkey->vkey; } else { new_hotkey = mem_alloc( sizeof(*new_hotkey) ); if (new_hotkey) { list_add_tail( &desktop->hotkeys, &new_hotkey->entry ); new_hotkey->queue = current->queue; new_hotkey->win = win_handle; new_hotkey->id = req->id; } } if (new_hotkey) { new_hotkey->flags = req->flags; new_hotkey->vkey = req->vkey; } release_object( desktop ); } DECL_HANDLER(unregister_hotkey) { struct desktop *desktop; user_handle_t win_handle = req->window; struct hotkey *hotkey; struct thread *thread; if (!(desktop = get_thread_desktop( current, 0 ))) return; if (win_handle) { if (!(win_handle = get_valid_window_handle( win_handle ))) { release_object( desktop ); return; } thread = get_window_thread( win_handle ); if (thread) release_object( thread ); if (thread != current) { release_object( desktop ); set_win32_error( ERROR_WINDOW_OF_OTHER_THREAD ); return; } } LIST_FOR_EACH_ENTRY( hotkey, &desktop->hotkeys, struct hotkey, entry ) { if (current->queue == hotkey->queue && win_handle == hotkey->win && req->id == hotkey->id) goto found; } release_object( desktop ); set_win32_error( ERROR_HOTKEY_NOT_REGISTERED ); return; found: reply->flags = hotkey->flags; reply->vkey = hotkey->vkey; list_remove( &hotkey->entry ); free( hotkey ); release_object( desktop ); } /* 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) { if ((thread_to->queue || thread_to == current) && (thread_from->queue || thread_from == current)) attach_thread_input( thread_from, thread_to ); else set_error( STATUS_INVALID_PARAMETER ); } else { if (thread_from->queue && thread_to->queue && thread_from->queue->input == thread_to->queue->input) detach_thread_input( thread_from ); else set_error( STATUS_ACCESS_DENIED ); } } 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 desktop *desktop; struct thread_input *input; if (req->tid) { if (!(thread = get_thread_from_id( req->tid ))) return; if (!(desktop = get_thread_desktop( thread, 0 ))) { release_object( thread ); return; } input = thread->queue ? thread->queue->input : NULL; } else { if (!(desktop = get_thread_desktop( current, 0 ))) return; input = desktop->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->cursor = input->cursor; reply->show_count = input->cursor_count; reply->rect = input->caret_rect; } /* foreground window is active window of foreground thread */ reply->foreground = desktop->foreground_input ? desktop->foreground_input->active : 0; if (thread) release_object( thread ); release_object( desktop ); } /* retrieve queue keyboard state for current thread or global async state */ DECL_HANDLER(get_key_state) { struct desktop *desktop; data_size_t size = min( 256, get_reply_max_size() ); if (req->async) /* get global async key state */ { if (!(desktop = get_thread_desktop( current, 0 ))) return; if (req->key >= 0) { reply->state = desktop->keystate[req->key & 0xff]; desktop->keystate[req->key & 0xff] &= ~0x40; } set_reply_data( desktop->keystate, size ); release_object( desktop ); } else if (!current->queue) { unsigned char *keystate; /* fallback to desktop keystate */ if (!(desktop = get_thread_desktop( current, 0 ))) return; if (req->key >= 0) reply->state = desktop->keystate[req->key & 0xff] & ~0x40; if ((keystate = set_reply_data_size( size ))) { unsigned int i; for (i = 0; i < size; i++) keystate[i] = desktop->keystate[i] & ~0x40; } release_object( desktop ); } else { unsigned char *keystate = current->queue->input->keystate; if (req->key >= 0) reply->state = keystate[req->key & 0xff]; set_reply_data( keystate, size ); } } /* set queue keyboard state for current thread */ DECL_HANDLER(set_key_state) { struct desktop *desktop; data_size_t size = min( 256, get_req_data_size() ); if (current->queue) memcpy( current->queue->input->keystate, get_req_data(), size ); if (req->async && (desktop = get_thread_desktop( current, 0 ))) { memcpy( desktop->keystate, get_req_data(), size ); release_object( desktop ); } } /* set the system foreground window */ DECL_HANDLER(set_foreground_window) { struct thread *thread = NULL; struct desktop *desktop; struct msg_queue *queue = get_current_queue(); if (!(desktop = get_thread_desktop( current, 0 ))) return; reply->previous = desktop->foreground_input ? desktop->foreground_input->active : 0; reply->send_msg_old = (reply->previous && desktop->foreground_input != queue->input); reply->send_msg_new = FALSE; if (is_valid_foreground_window( req->handle ) && (thread = get_window_thread( req->handle )) && thread->queue->input->desktop == desktop) { set_foreground_input( desktop, thread->queue->input ); reply->send_msg_new = (desktop->foreground_input != queue->input); } else set_win32_error( ERROR_INVALID_WINDOW_HANDLE ); if (thread) release_object( thread ); release_object( desktop ); } /* 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; /* if in menu mode, reject all requests to change focus, except if the menu bit is set */ if (input->menu_owner && !(req->flags & CAPTURE_MENU)) { set_error(STATUS_ACCESS_DENIED); return; } 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) { switch (req->state) { case CARET_STATE_OFF: input->caret_state = 0; break; case CARET_STATE_ON: input->caret_state = 1; break; case CARET_STATE_TOGGLE: input->caret_state = !input->caret_state; break; case CARET_STATE_ON_IF_MOVED: if (req->x != reply->old_rect.left || req->y != reply->old_rect.top) input->caret_state = 1; break; } } } /* get the time of the last input event */ DECL_HANDLER(get_last_input_time) { reply->time = last_input_time; } /* set/get the current cursor */ DECL_HANDLER(set_cursor) { struct msg_queue *queue = get_current_queue(); struct thread_input *input; if (!queue) return; input = queue->input; reply->prev_handle = input->cursor; reply->prev_count = input->cursor_count; reply->prev_x = input->desktop->cursor.x; reply->prev_y = input->desktop->cursor.y; if (req->flags & SET_CURSOR_HANDLE) { if (req->handle && !get_user_object( req->handle, USER_CLIENT )) { set_win32_error( ERROR_INVALID_CURSOR_HANDLE ); return; } input->cursor = req->handle; } if (req->flags & SET_CURSOR_COUNT) { queue->cursor_count += req->show_count; input->cursor_count += req->show_count; } if (req->flags & SET_CURSOR_POS) { set_cursor_pos( input->desktop, req->x, req->y ); } if (req->flags & (SET_CURSOR_CLIP | SET_CURSOR_NOCLIP)) { struct desktop *desktop = input->desktop; /* only the desktop owner can set the message */ if (req->clip_msg && get_top_window_owner(desktop) == current->process) desktop->cursor.clip_msg = req->clip_msg; set_clip_rectangle( desktop, (req->flags & SET_CURSOR_NOCLIP) ? NULL : &req->clip, 0 ); } reply->new_x = input->desktop->cursor.x; reply->new_y = input->desktop->cursor.y; reply->new_clip = input->desktop->cursor.clip; reply->last_change = input->desktop->cursor.last_change; } /* Get the history of the 64 last cursor positions */ DECL_HANDLER(get_cursor_history) { cursor_pos_t *pos; unsigned int i, count = min( 64, get_reply_max_size() / sizeof(*pos) ); if ((pos = set_reply_data_size( count * sizeof(*pos) ))) for (i = 0; i < count; i++) pos[i] = cursor_history[(i + cursor_history_latest) % ARRAY_SIZE(cursor_history)]; } DECL_HANDLER(get_rawinput_buffer) { struct thread_input *input = current->queue->input; data_size_t size = 0, next_size = 0; struct list *ptr; char *buf, *cur, *tmp; int count = 0, buf_size = 16 * sizeof(struct hardware_msg_data); if (!req->buffer_size) buf = NULL; else if (!(buf = mem_alloc( buf_size ))) return; cur = buf; ptr = list_head( &input->msg_list ); while (ptr) { struct message *msg = LIST_ENTRY( ptr, struct message, entry ); struct hardware_msg_data *data = msg->data; ptr = list_next( &input->msg_list, ptr ); if (msg->msg != WM_INPUT) continue; next_size = req->rawinput_size; if (size + next_size > req->buffer_size) break; if (cur + sizeof(*data) > buf + get_reply_max_size()) break; if (cur + sizeof(*data) > buf + buf_size) { buf_size += buf_size / 2; if (!(tmp = realloc( buf, buf_size ))) { set_error( STATUS_NO_MEMORY ); return; } cur = tmp + (cur - buf); buf = tmp; } memcpy(cur, data, sizeof(*data)); list_remove( &msg->entry ); free_message( msg ); size += next_size; cur += sizeof(*data); count++; } reply->next_size = next_size; reply->count = count; set_reply_data_ptr( buf, cur - buf ); } DECL_HANDLER(update_rawinput_devices) { const struct rawinput_device *devices = get_req_data(); unsigned int device_count = get_req_data_size() / sizeof (*devices); const struct rawinput_device_entry *e; unsigned int i; for (i = 0; i < device_count; ++i) { update_rawinput_device(&devices[i]); } e = find_rawinput_device( current->process, 1, 2 ); current->process->rawinput_mouse = e ? &e->device : NULL; e = find_rawinput_device( current->process, 1, 6 ); current->process->rawinput_kbd = e ? &e->device : NULL; } DECL_HANDLER(get_rawinput_devices) { struct rawinput_device_entry *e; struct rawinput_device *devices; unsigned int i = 0, device_count = list_count( ¤t->process->rawinput_devices ); unsigned int size = device_count * sizeof(*devices); reply->device_count = device_count; /* no buffer provided, nothing else to do */ if (!get_reply_max_size()) return; if (size > get_reply_max_size()) set_error( STATUS_BUFFER_TOO_SMALL ); else if ((devices = set_reply_data_size( size ))) { LIST_FOR_EACH_ENTRY( e, ¤t->process->rawinput_devices, struct rawinput_device_entry, entry ) devices[i++] = e->device; } }