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>
40 struct object obj; /* object header */
41 int manual; /* manual reset */
42 int signaled; /* current signaled state */
43 int period; /* timer period in ms */
44 struct timeval when; /* next expiration */
45 struct timeout_user *timeout; /* timeout user */
46 struct thread *thread; /* thread that set the APC function */
47 void *callback; /* callback APC function */
48 void *arg; /* callback argument */
51 static void timer_dump( struct object *obj, int verbose );
52 static int timer_signaled( struct object *obj, struct thread *thread );
53 static int timer_satisfied( struct object *obj, struct thread *thread );
54 static void timer_destroy( struct object *obj );
56 static const struct object_ops timer_ops =
58 sizeof(struct timer), /* size */
59 timer_dump, /* dump */
60 add_queue, /* add_queue */
61 remove_queue, /* remove_queue */
62 timer_signaled, /* signaled */
63 timer_satisfied, /* satisfied */
64 no_signal, /* signal */
65 no_get_fd, /* get_fd */
66 no_lookup_name, /* lookup_name */
67 no_close_handle, /* close_handle */
68 timer_destroy /* destroy */
72 /* create a timer object */
73 static struct timer *create_timer( const struct unicode_str *name, unsigned int attr,
78 if ((timer = create_named_object( sync_namespace, &timer_ops, name, attr )))
80 if (get_error() != STATUS_OBJECT_NAME_EXISTS)
82 /* initialize it if it didn't already exist */
83 timer->manual = manual;
85 timer->when.tv_sec = 0;
86 timer->when.tv_usec = 0;
88 timer->timeout = NULL;
95 /* callback on timer expiration */
96 static void timer_callback( void *private )
98 struct timer *timer = (struct timer *)private;
103 if (!thread_queue_apc( timer->thread, &timer->obj, timer->callback, APC_TIMER, 0,
104 (void *)timer->when.tv_sec, (void *)timer->when.tv_usec, timer->arg))
106 release_object( timer->thread );
107 timer->thread = NULL;
111 if (timer->period) /* schedule the next expiration */
113 add_timeout( &timer->when, timer->period );
114 timer->timeout = add_timeout_user( &timer->when, timer_callback, timer );
116 else timer->timeout = NULL;
118 /* wake up waiters */
120 wake_up( &timer->obj, 0 );
123 /* cancel a running timer */
124 static int cancel_timer( struct timer *timer )
126 int signaled = timer->signaled;
130 remove_timeout_user( timer->timeout );
131 timer->timeout = NULL;
135 thread_cancel_apc( timer->thread, &timer->obj, 0 );
136 release_object( timer->thread );
137 timer->thread = NULL;
142 /* set the timer expiration and period */
143 static int set_timer( struct timer *timer, const abs_time_t *expire, int period,
144 void *callback, void *arg )
146 int signaled = cancel_timer( timer );
149 period = 0; /* period doesn't make any sense for a manual timer */
152 if (!expire->sec && !expire->usec)
154 /* special case: use now + period as first expiration */
155 gettimeofday( &timer->when, NULL );
156 add_timeout( &timer->when, period );
160 timer->when.tv_sec = expire->sec;
161 timer->when.tv_usec = expire->usec;
163 timer->period = period;
164 timer->callback = callback;
166 if (callback) timer->thread = (struct thread *)grab_object( current );
167 timer->timeout = add_timeout_user( &timer->when, timer_callback, timer );
171 static void timer_dump( struct object *obj, int verbose )
173 struct timer *timer = (struct timer *)obj;
174 assert( obj->ops == &timer_ops );
175 fprintf( stderr, "Timer manual=%d when=%ld.%06ld period=%d ",
176 timer->manual, timer->when.tv_sec, timer->when.tv_usec, timer->period );
177 dump_object_name( &timer->obj );
178 fputc( '\n', stderr );
181 static int timer_signaled( struct object *obj, struct thread *thread )
183 struct timer *timer = (struct timer *)obj;
184 assert( obj->ops == &timer_ops );
185 return timer->signaled;
188 static int timer_satisfied( struct object *obj, struct thread *thread )
190 struct timer *timer = (struct timer *)obj;
191 assert( obj->ops == &timer_ops );
192 if (!timer->manual) timer->signaled = 0;
196 static void timer_destroy( struct object *obj )
198 struct timer *timer = (struct timer *)obj;
199 assert( obj->ops == &timer_ops );
201 if (timer->timeout) remove_timeout_user( timer->timeout );
202 if (timer->thread) release_object( timer->thread );
206 DECL_HANDLER(create_timer)
209 struct unicode_str name;
212 get_req_unicode_str( &name );
213 if ((timer = create_timer( &name, req->attributes, req->manual )))
215 reply->handle = alloc_handle( current->process, timer, req->access,
216 req->attributes & OBJ_INHERIT );
217 release_object( timer );
221 /* open a handle to a timer */
222 DECL_HANDLER(open_timer)
224 struct unicode_str name;
226 get_req_unicode_str( &name );
227 reply->handle = open_object( sync_namespace, &name, &timer_ops, req->access, req->attributes );
230 /* set a waitable timer */
231 DECL_HANDLER(set_timer)
235 if ((timer = (struct timer *)get_handle_obj( current->process, req->handle,
236 TIMER_MODIFY_STATE, &timer_ops )))
238 reply->signaled = set_timer( timer, &req->expire, req->period, req->callback, req->arg );
239 release_object( timer );
243 /* cancel a waitable timer */
244 DECL_HANDLER(cancel_timer)
248 if ((timer = (struct timer *)get_handle_obj( current->process, req->handle,
249 TIMER_MODIFY_STATE, &timer_ops )))
251 reply->signaled = cancel_timer( timer );
252 release_object( timer );
256 /* Get information on a waitable timer */
257 DECL_HANDLER(get_timer_info)
261 if ((timer = (struct timer *)get_handle_obj( current->process, req->handle,
262 TIMER_QUERY_STATE, &timer_ops )))
264 reply->when.sec = timer->when.tv_sec;
265 reply->when.usec = timer->when.tv_usec;
266 reply->signaled = timer->signaled;
267 release_object( timer );