2 * Waitable timers management
4 * Copyright (C) 1999 Alexandre Julliard
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
11 * This library is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with this library; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
22 #include "wine/port.h"
28 #include <sys/types.h>
36 struct object obj; /* object header */
37 int manual; /* manual reset */
38 int signaled; /* current signaled state */
39 int period; /* timer period in ms */
40 struct timeval when; /* next expiration */
41 struct timeout_user *timeout; /* timeout user */
42 struct thread *thread; /* thread that set the APC function */
43 void *callback; /* callback APC function */
44 void *arg; /* callback argument */
47 static void timer_dump( struct object *obj, int verbose );
48 static int timer_signaled( struct object *obj, struct thread *thread );
49 static int timer_satisfied( struct object *obj, struct thread *thread );
50 static void timer_destroy( struct object *obj );
52 static const struct object_ops timer_ops =
54 sizeof(struct timer), /* size */
55 timer_dump, /* dump */
56 add_queue, /* add_queue */
57 remove_queue, /* remove_queue */
58 timer_signaled, /* signaled */
59 timer_satisfied, /* satisfied */
60 NULL, /* get_poll_events */
61 NULL, /* poll_event */
62 no_get_fd, /* get_fd */
64 no_get_file_info, /* get_file_info */
65 NULL, /* queue_async */
66 timer_destroy /* destroy */
70 /* create a timer object */
71 static struct timer *create_timer( const WCHAR *name, size_t len, int manual )
75 if ((timer = create_named_object( sync_namespace, &timer_ops, name, len )))
77 if (get_error() != STATUS_OBJECT_NAME_COLLISION)
79 /* initialize it if it didn't already exist */
80 timer->manual = manual;
82 timer->when.tv_sec = 0;
83 timer->when.tv_usec = 0;
85 timer->timeout = NULL;
92 /* callback on timer expiration */
93 static void timer_callback( void *private )
95 struct timer *timer = (struct timer *)private;
100 if (!thread_queue_apc( timer->thread, &timer->obj, timer->callback, APC_TIMER, 0, 3,
101 (void *)timer->when.tv_sec, (void *)timer->when.tv_usec, timer->arg))
103 release_object( timer->thread );
104 timer->thread = NULL;
108 if (timer->period) /* schedule the next expiration */
110 add_timeout( &timer->when, timer->period );
111 timer->timeout = add_timeout_user( &timer->when, timer_callback, timer );
113 else timer->timeout = NULL;
115 /* wake up waiters */
117 wake_up( &timer->obj, 0 );
120 /* cancel a running timer */
121 static void cancel_timer( struct timer *timer )
125 remove_timeout_user( timer->timeout );
126 timer->timeout = NULL;
130 thread_cancel_apc( timer->thread, &timer->obj, 0 );
131 release_object( timer->thread );
132 timer->thread = NULL;
136 /* set the timer expiration and period */
137 static void set_timer( struct timer *timer, int sec, int usec, int period,
138 void *callback, void *arg )
140 cancel_timer( timer );
143 period = 0; /* period doesn't make any sense for a manual timer */
148 /* special case: use now + period as first expiration */
149 gettimeofday( &timer->when, 0 );
150 add_timeout( &timer->when, period );
154 timer->when.tv_sec = sec;
155 timer->when.tv_usec = usec;
157 timer->period = period;
158 timer->callback = callback;
160 if (callback) timer->thread = (struct thread *)grab_object( current );
161 timer->timeout = add_timeout_user( &timer->when, timer_callback, timer );
164 static void timer_dump( struct object *obj, int verbose )
166 struct timer *timer = (struct timer *)obj;
167 assert( obj->ops == &timer_ops );
168 fprintf( stderr, "Timer manual=%d when=%ld.%06ld period=%d ",
169 timer->manual, timer->when.tv_sec, timer->when.tv_usec, timer->period );
170 dump_object_name( &timer->obj );
171 fputc( '\n', stderr );
174 static int timer_signaled( struct object *obj, struct thread *thread )
176 struct timer *timer = (struct timer *)obj;
177 assert( obj->ops == &timer_ops );
178 return timer->signaled;
181 static int timer_satisfied( struct object *obj, struct thread *thread )
183 struct timer *timer = (struct timer *)obj;
184 assert( obj->ops == &timer_ops );
185 if (!timer->manual) timer->signaled = 0;
189 static void timer_destroy( struct object *obj )
191 struct timer *timer = (struct timer *)obj;
192 assert( obj->ops == &timer_ops );
194 if (timer->timeout) remove_timeout_user( timer->timeout );
195 if (timer->thread) release_object( timer->thread );
199 DECL_HANDLER(create_timer)
204 if ((timer = create_timer( get_req_data(), get_req_data_size(), req->manual )))
206 reply->handle = alloc_handle( current->process, timer, TIMER_ALL_ACCESS, req->inherit );
207 release_object( timer );
211 /* open a handle to a timer */
212 DECL_HANDLER(open_timer)
214 reply->handle = open_object( sync_namespace, get_req_data(), get_req_data_size(),
215 &timer_ops, req->access, req->inherit );
218 /* set a waitable timer */
219 DECL_HANDLER(set_timer)
223 if ((timer = (struct timer *)get_handle_obj( current->process, req->handle,
224 TIMER_MODIFY_STATE, &timer_ops )))
226 set_timer( timer, req->sec, req->usec, req->period, req->callback, req->arg );
227 release_object( timer );
231 /* cancel a waitable timer */
232 DECL_HANDLER(cancel_timer)
236 if ((timer = (struct timer *)get_handle_obj( current->process, req->handle,
237 TIMER_MODIFY_STATE, &timer_ops )))
239 cancel_timer( timer );
240 release_object( timer );