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>
38 struct object obj; /* object header */
39 int manual; /* manual reset */
40 int signaled; /* current signaled state */
41 int period; /* timer period in ms */
42 struct timeval when; /* next expiration */
43 struct timeout_user *timeout; /* timeout user */
44 struct thread *thread; /* thread that set the APC function */
45 void *callback; /* callback APC function */
46 void *arg; /* callback argument */
49 static void timer_dump( struct object *obj, int verbose );
50 static int timer_signaled( struct object *obj, struct thread *thread );
51 static int timer_satisfied( struct object *obj, struct thread *thread );
52 static void timer_destroy( struct object *obj );
54 static const struct object_ops timer_ops =
56 sizeof(struct timer), /* size */
57 timer_dump, /* dump */
58 add_queue, /* add_queue */
59 remove_queue, /* remove_queue */
60 timer_signaled, /* signaled */
61 timer_satisfied, /* satisfied */
62 no_signal, /* signal */
63 no_get_fd, /* get_fd */
64 timer_destroy /* destroy */
68 /* create a timer object */
69 static struct timer *create_timer( const WCHAR *name, size_t len, int manual )
73 if ((timer = create_named_object( sync_namespace, &timer_ops, name, len )))
75 if (get_error() != STATUS_OBJECT_NAME_COLLISION)
77 /* initialize it if it didn't already exist */
78 timer->manual = manual;
80 timer->when.tv_sec = 0;
81 timer->when.tv_usec = 0;
83 timer->timeout = NULL;
90 /* callback on timer expiration */
91 static void timer_callback( void *private )
93 struct timer *timer = (struct timer *)private;
98 if (!thread_queue_apc( timer->thread, &timer->obj, timer->callback, APC_TIMER, 0,
99 (void *)timer->when.tv_sec, (void *)timer->when.tv_usec, timer->arg))
101 release_object( timer->thread );
102 timer->thread = NULL;
106 if (timer->period) /* schedule the next expiration */
108 add_timeout( &timer->when, timer->period );
109 timer->timeout = add_timeout_user( &timer->when, timer_callback, timer );
111 else timer->timeout = NULL;
113 /* wake up waiters */
115 wake_up( &timer->obj, 0 );
118 /* cancel a running timer */
119 static int cancel_timer( struct timer *timer )
121 int signaled = timer->signaled;
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;
137 /* set the timer expiration and period */
138 static int set_timer( struct timer *timer, const abs_time_t *expire, int period,
139 void *callback, void *arg )
141 int signaled = cancel_timer( timer );
144 period = 0; /* period doesn't make any sense for a manual timer */
147 if (!expire->sec && !expire->usec)
149 /* special case: use now + period as first expiration */
150 gettimeofday( &timer->when, 0 );
151 add_timeout( &timer->when, period );
155 timer->when.tv_sec = expire->sec;
156 timer->when.tv_usec = expire->usec;
158 timer->period = period;
159 timer->callback = callback;
161 if (callback) timer->thread = (struct thread *)grab_object( current );
162 timer->timeout = add_timeout_user( &timer->when, timer_callback, timer );
166 static void timer_dump( struct object *obj, int verbose )
168 struct timer *timer = (struct timer *)obj;
169 assert( obj->ops == &timer_ops );
170 fprintf( stderr, "Timer manual=%d when=%ld.%06ld period=%d ",
171 timer->manual, timer->when.tv_sec, timer->when.tv_usec, timer->period );
172 dump_object_name( &timer->obj );
173 fputc( '\n', stderr );
176 static int timer_signaled( struct object *obj, struct thread *thread )
178 struct timer *timer = (struct timer *)obj;
179 assert( obj->ops == &timer_ops );
180 return timer->signaled;
183 static int timer_satisfied( struct object *obj, struct thread *thread )
185 struct timer *timer = (struct timer *)obj;
186 assert( obj->ops == &timer_ops );
187 if (!timer->manual) timer->signaled = 0;
191 static void timer_destroy( struct object *obj )
193 struct timer *timer = (struct timer *)obj;
194 assert( obj->ops == &timer_ops );
196 if (timer->timeout) remove_timeout_user( timer->timeout );
197 if (timer->thread) release_object( timer->thread );
201 DECL_HANDLER(create_timer)
206 if ((timer = create_timer( get_req_data(), get_req_data_size(), req->manual )))
208 reply->handle = alloc_handle( current->process, timer, req->access, req->inherit );
209 release_object( timer );
213 /* open a handle to a timer */
214 DECL_HANDLER(open_timer)
216 reply->handle = open_object( sync_namespace, get_req_data(), get_req_data_size(),
217 &timer_ops, req->access, req->inherit );
220 /* set a waitable timer */
221 DECL_HANDLER(set_timer)
225 if ((timer = (struct timer *)get_handle_obj( current->process, req->handle,
226 TIMER_MODIFY_STATE, &timer_ops )))
228 reply->signaled = set_timer( timer, &req->expire, req->period, req->callback, req->arg );
229 release_object( timer );
233 /* cancel a waitable timer */
234 DECL_HANDLER(cancel_timer)
238 if ((timer = (struct timer *)get_handle_obj( current->process, req->handle,
239 TIMER_MODIFY_STATE, &timer_ops )))
241 reply->signaled = cancel_timer( timer );
242 release_object( timer );
246 /* Get information on a waitable timer */
247 DECL_HANDLER(get_timer_info)
251 if ((timer = (struct timer *)get_handle_obj( current->process, req->handle,
252 TIMER_QUERY_STATE, &timer_ops )))
254 reply->when.sec = timer->when.tv_sec;
255 reply->when.usec = timer->when.tv_usec;
256 reply->signaled = timer->signaled;
257 release_object( timer );