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Sweden-Number/server/queue.c

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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"
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 message *next; /* next message in list */
struct message *prev; /* prev message in 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 */
void *data; /* message data for sent messages */
unsigned int data_size; /* size of message data */
struct message_result *result; /* result in sender queue */
};
struct message_list
{
struct message *first; /* head of list */
struct message *last; /* tail of list */
};
struct timer
{
struct timer *next; /* next timer in list */
struct timer *prev; /* prev timer in 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 message *msg; /* message currently processed */
struct thread *msg_thread; /* thread processing the message */
struct message_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 message_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 timer *first_timer; /* head of timer list */
struct timer *last_timer; /* tail of timer list */
struct timer *next_timer; /* next timer to expire */
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 )
{
input->caret = win;
input->caret_rect.left = 0;
input->caret_rect.top = 0;
input->caret_rect.right = 0;
input->caret_rect.bottom = 0;
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;
input->msg = NULL;
input->msg_thread = NULL;
input->msg_list.first = input->msg_list.last = NULL;
set_caret_window( input, 0 );
memset( input->keystate, 0, sizeof(input->keystate) );
}
return input;
}
/* release the thread input data of a given thread */
static void release_thread_input( struct thread *thread )
{
struct thread_input *input = thread->queue->input;
if (!input) return;
if (input->msg_thread == thread)
{
release_object( input->msg_thread );
input->msg_thread = NULL;
input->msg = NULL;
}
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->first_timer = NULL;
queue->last_timer = NULL;
queue->next_timer = NULL;
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 );
for (i = 0; i < NB_MSG_KINDS; i++)
queue->msg_list[i].first = queue->msg_list[i].last = NULL;
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;
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;
}
}
release_thread_input( thread );
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);
}
/* 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;
}
/* append a message to the end of a list */
inline static void append_message( struct message_list *list, struct message *msg )
{
msg->next = NULL;
if ((msg->prev = list->last)) msg->prev->next = msg;
else list->first = msg;
list->last = msg;
}
/* unlink a message from a list it */
inline static void unlink_message( struct message_list *list, struct message *msg )
{
if (msg->next) msg->next->prev = msg->prev;
else list->last = msg->prev;
if (msg->prev) msg->prev->next = msg->next;
else list->first = msg->next;
}
/* 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 = input->msg_list.last;
if (!prev) return 0;
if (input->msg == prev) 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;
append_message( &res->sender->msg_list[SEND_MESSAGE], res->callback_msg );
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 )
{
unlink_message( &queue->msg_list[kind], msg );
switch(kind)
{
case SEND_MESSAGE:
if (!queue->msg_list[kind].first) clear_queue_bits( queue, QS_SENDMESSAGE );
break;
case POST_MESSAGE:
if (!queue->msg_list[kind].first) 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->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;
if (msg->data) set_reply_data_ptr( msg->data, msg->data_size );
unlink_message( &queue->msg_list[SEND_MESSAGE], msg );
/* put the result on the receiver result stack */
if (result)
{
result->recv_next = queue->recv_result;
queue->recv_result = result;
}
free( msg );
if (!queue->msg_list[SEND_MESSAGE].first) 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;
struct message_list *list = &queue->msg_list[POST_MESSAGE];
/* check against the filters */
for (msg = list->first; msg; msg = msg->next)
{
if (msg->msg == WM_QUIT) break; /* WM_QUIT is never filtered */
if (win && msg->win && msg->win != win && !is_child_window( win, msg->win )) continue;
if (msg->msg < first) continue;
if (msg->msg > last) continue;
break; /* found one */
}
if (!msg) return 0;
/* return it to the app */
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 message_list *list )
{
struct message *msg = list->first;
while (msg)
{
struct message *next = msg->next;
free_message( msg );
msg = next;
}
}
/* 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 */
for (entry = queue->obj.head; entry; entry = entry->next)
{
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 timer *timer = queue->first_timer;
int i;
cleanup_results( queue );
for (i = 0; i < NB_MSG_KINDS; i++) empty_msg_list( &queue->msg_list[i] );
while (timer)
{
struct timer *next = timer->next;
free( timer );
timer = next;
}
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;
if (input->msg_thread) release_object( input->msg_thread );
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 timer *timer )
{
if (queue->timeout)
{
remove_timeout_user( queue->timeout );
queue->timeout = NULL;
}
if ((queue->next_timer = timer))
queue->timeout = add_timeout_user( &timer->when, timer_callback, queue );
/* set/clear QS_TIMER bit */
if (queue->next_timer == queue->first_timer)
clear_queue_bits( queue, QS_TIMER );
else
set_queue_bits( queue, QS_TIMER );
}
/* callback for the next timer expiration */
static void timer_callback( void *private )
{
struct msg_queue *queue = private;
queue->timeout = NULL;
/* move on to the next timer */
set_next_timer( queue, queue->next_timer->next );
}
/* link a timer at its rightful place in the queue list */
static void link_timer( struct msg_queue *queue, struct timer *timer )
{
struct timer *pos = queue->next_timer;
while (pos && time_before( &pos->when, &timer->when )) pos = pos->next;
if (pos) /* insert before pos */
{
if ((timer->prev = pos->prev)) timer->prev->next = timer;
else queue->first_timer = timer;
timer->next = pos;
pos->prev = timer;
}
else /* insert at end */
{
timer->next = NULL;
timer->prev = queue->last_timer;
if (queue->last_timer) queue->last_timer->next = timer;
else queue->first_timer = timer;
queue->last_timer = timer;
}
/* check if we replaced the next timer */
if (pos == queue->next_timer) set_next_timer( queue, timer );
}
/* remove a timer from the queue timer list */
static void unlink_timer( struct msg_queue *queue, struct timer *timer )
{
if (timer->next) timer->next->prev = timer->prev;
else queue->last_timer = timer->prev;
if (timer->prev) timer->prev->next = timer->next;
else queue->first_timer = timer->next;
/* check if we removed the next timer */
if (queue->next_timer == timer) set_next_timer( queue, timer->next );
else if (queue->next_timer == queue->first_timer) clear_queue_bits( queue, QS_TIMER );
}
/* restart an expired timer */
static void restart_timer( struct msg_queue *queue, struct timer *timer )
{
struct timeval now;
unlink_timer( queue, timer );
gettimeofday( &now, 0 );
while (!time_before( &now, &timer->when )) add_timeout( &timer->when, timer->rate );
link_timer( queue, timer );
}
/* 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 timer *timer;
for (timer = queue->first_timer; (timer && timer != queue->next_timer); timer = timer->next)
{
if (win && timer->win != win) continue;
if (timer->msg >= get_first && timer->msg <= get_last)
{
if (remove) restart_timer( queue, timer );
return timer;
}
}
return NULL;
}
/* kill a timer */
static int kill_timer( struct msg_queue *queue, user_handle_t win,
unsigned int msg, unsigned int id )
{
struct timer *timer;
for (timer = queue->first_timer; timer; timer = timer->next)
{
if (timer->win != win || timer->msg != msg || timer->id != id) continue;
unlink_timer( queue, timer );
free( timer );
return 1;
}
return 0;
}
/* 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 = rate;
gettimeofday( &timer->when, 0 );
add_timeout( &timer->when, rate );
link_timer( queue, timer );
}
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_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 thread *thread, int remove )
{
struct thread_input *input = thread->queue->input;
if (input->msg_thread != thread) return;
if (remove)
{
struct message *other;
int clr_bit;
update_input_key_state( input, input->msg );
unlink_message( &input->msg_list, input->msg );
clr_bit = get_hardware_msg_bit( input->msg );
for (other = input->msg_list.first; other; other = other->next)
if (get_hardware_msg_bit( other ) == clr_bit) break;
if (!other) clear_queue_bits( thread->queue, clr_bit );
free_message( input->msg );
}
release_object( input->msg_thread );
input->msg = NULL;
input->msg_thread = NULL;
}
/* 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)) 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
{
append_message( &input->msg_list, msg );
set_queue_bits( thread->queue, get_hardware_msg_bit(msg) );
}
release_object( thread );
}
/* find a hardware message for the given queue */
static int get_hardware_message( struct thread *thread, struct message *first,
user_handle_t filter_win, struct get_message_reply *reply )
{
struct thread_input *input = thread->queue->input;
struct thread *win_thread;
struct message *msg;
user_handle_t win;
int clear_bits, got_one = 0;
unsigned int msg_code;
if (input->msg_thread && input->msg_thread != thread)
return 0; /* locked by another thread */
if (!first)
{
msg = input->msg_list.first;
clear_bits = QS_KEY | QS_MOUSEMOVE | QS_MOUSEBUTTON;
}
else
{
msg = first->next;
clear_bits = 0; /* don't clear bits if we don't go through the whole list */
}
while (msg)
{
win = find_hardware_message_window( input, msg, &msg_code );
if (!win || !(win_thread = get_window_thread( win )))
{
/* no window at all, remove it */
struct message *next = msg->next;
update_input_key_state( input, msg );
unlink_message( &input->msg_list, msg );
free_message( msg );
msg = next;
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;
msg = msg->next;
continue;
}
/* if we already got a message for another thread, or if it doesn't
* match the filter we skip it (filter is only checked for keyboard
* messages since the dest window for a mouse message depends on hittest)
*/
if (got_one ||
(filter_win && is_keyboard_msg(msg) &&
win != filter_win && !is_child_window( filter_win, win )))
{
clear_bits &= ~get_hardware_msg_bit( msg );
release_object( win_thread );
msg = msg->next;
continue;
}
/* now we can return it */
if (!input->msg_thread) input->msg_thread = win_thread;
else release_object( win_thread );
input->msg = msg;
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;
return 1;
}
/* nothing found, clear the hardware queue bits */
clear_queue_bits( thread->queue, clear_bits );
if (input->msg_thread) release_object( input->msg_thread );
input->msg = NULL;
input->msg_thread = NULL;
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 timer *timer;
struct message *msg;
int i;
if (!queue) return;
/* remove timers */
timer = queue->first_timer;
while (timer)
{
struct timer *next = timer->next;
if (timer->win == win)
{
unlink_timer( queue, timer );
free( timer );
}
timer = next;
}
/* remove messages */
for (i = 0; i < NB_MSG_KINDS; i++)
{
msg = queue->msg_list[i].first;
while (msg)
{
struct message *next = msg->next;
if (msg->win == win) remove_queue_message( queue, msg, i );
msg = next;
}
}
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->result = NULL;
msg->data = NULL;
msg->data_size = 0;
append_message( &thread->queue->msg_list[POST_MESSAGE], msg );
set_queue_bits( thread->queue, QS_POSTMESSAGE );
}
release_object( thread );
}
/* 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->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:
append_message( &recv_queue->msg_list[SEND_MESSAGE], msg );
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;
}
append_message( &recv_queue->msg_list[POST_MESSAGE], msg );
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 message *msg;
struct message *first_hw_msg = NULL;
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 of all release the hardware input lock if we own it */
/* we'll grab it again if we find a hardware message */
if (queue->input->msg_thread == current)
{
first_hw_msg = queue->input->msg;
release_hardware_message( current, 0 );
}
/* first check for sent messages */
if ((msg = queue->msg_list[SEND_MESSAGE].first))
{
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 (get_hardware_message( current, first_hw_msg, get_win, reply ))
return;
/* now check for WM_PAINT */
if (queue->paint_count &&
(WM_PAINT >= req->get_first) && (WM_PAINT <= 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 );
return;
}
if (req->type == MSG_HARDWARE)
{
struct thread_input *input = current->queue->input;
if (input->msg_thread == current) release_hardware_message( current, req->remove );
else 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() );
}
/* 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 = get_current_queue();
user_handle_t win = get_user_full_handle( req->win );
if (!queue) return;
/* remove it if it existed already */
if (win) kill_timer( queue, win, req->msg, req->id );
if ((timer = set_timer( queue, req->rate )))
{
timer->win = win;
timer->msg = req->msg;
timer->id = req->id;
timer->lparam = req->lparam;
}
}
/* kill a window timer */
DECL_HANDLER(kill_win_timer)
{
struct msg_queue *queue = current->queue;
if (!queue || !kill_timer( queue, get_user_full_handle(req->win), req->msg, req->id ))
set_error( STATUS_INVALID_PARAMETER );
}
/* 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 = req->width;
input->caret_rect.bottom = 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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