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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
22 #include "wine/port.h"
28 #include <sys/types.h>
32 #define WIN32_NO_STATUS
42 struct object obj; /* object header */
43 int manual; /* manual reset */
44 int signaled; /* current signaled state */
45 int period; /* timer period in ms */
46 struct timeval when; /* next expiration */
47 struct timeout_user *timeout; /* timeout user */
48 struct thread *thread; /* thread that set the APC function */
49 void *callback; /* callback APC function */
50 void *arg; /* callback argument */
53 static void timer_dump( struct object *obj, int verbose );
54 static int timer_signaled( struct object *obj, struct thread *thread );
55 static int timer_satisfied( struct object *obj, struct thread *thread );
56 static unsigned int timer_map_access( struct object *obj, unsigned int access );
57 static void timer_destroy( struct object *obj );
59 static const struct object_ops timer_ops =
61 sizeof(struct timer), /* size */
62 timer_dump, /* dump */
63 add_queue, /* add_queue */
64 remove_queue, /* remove_queue */
65 timer_signaled, /* signaled */
66 timer_satisfied, /* satisfied */
67 no_signal, /* signal */
68 no_get_fd, /* get_fd */
69 timer_map_access, /* map_access */
70 no_lookup_name, /* lookup_name */
71 no_close_handle, /* close_handle */
72 timer_destroy /* destroy */
76 /* create a timer object */
77 static struct timer *create_timer( struct directory *root, const struct unicode_str *name,
78 unsigned int attr, int manual )
82 if ((timer = create_named_object_dir( root, name, attr, &timer_ops )))
84 if (get_error() != STATUS_OBJECT_NAME_EXISTS)
86 /* initialize it if it didn't already exist */
87 timer->manual = manual;
89 timer->when.tv_sec = 0;
90 timer->when.tv_usec = 0;
92 timer->timeout = NULL;
99 /* callback on timer expiration */
100 static void timer_callback( void *private )
102 struct timer *timer = (struct timer *)private;
107 if (!thread_queue_apc( timer->thread, &timer->obj, timer->callback, APC_TIMER, 0,
108 (void *)timer->when.tv_sec, (void *)timer->when.tv_usec, timer->arg))
110 release_object( timer->thread );
111 timer->thread = NULL;
115 if (timer->period) /* schedule the next expiration */
117 add_timeout( &timer->when, timer->period );
118 timer->timeout = add_timeout_user( &timer->when, timer_callback, timer );
120 else timer->timeout = NULL;
122 /* wake up waiters */
124 wake_up( &timer->obj, 0 );
127 /* cancel a running timer */
128 static int cancel_timer( struct timer *timer )
130 int signaled = timer->signaled;
134 remove_timeout_user( timer->timeout );
135 timer->timeout = NULL;
139 thread_cancel_apc( timer->thread, &timer->obj, 0 );
140 release_object( timer->thread );
141 timer->thread = NULL;
146 /* set the timer expiration and period */
147 static int set_timer( struct timer *timer, const abs_time_t *expire, int period,
148 void *callback, void *arg )
150 int signaled = cancel_timer( timer );
153 period = 0; /* period doesn't make any sense for a manual timer */
156 if (!expire->sec && !expire->usec)
158 /* special case: use now + period as first expiration */
159 gettimeofday( &timer->when, NULL );
160 add_timeout( &timer->when, period );
164 timer->when.tv_sec = expire->sec;
165 timer->when.tv_usec = expire->usec;
167 timer->period = period;
168 timer->callback = callback;
170 if (callback) timer->thread = (struct thread *)grab_object( current );
171 timer->timeout = add_timeout_user( &timer->when, timer_callback, timer );
175 static void timer_dump( struct object *obj, int verbose )
177 struct timer *timer = (struct timer *)obj;
178 assert( obj->ops == &timer_ops );
179 fprintf( stderr, "Timer manual=%d when=%ld.%06u period=%d ",
180 timer->manual, timer->when.tv_sec, (unsigned int)timer->when.tv_usec, timer->period );
181 dump_object_name( &timer->obj );
182 fputc( '\n', stderr );
185 static int timer_signaled( struct object *obj, struct thread *thread )
187 struct timer *timer = (struct timer *)obj;
188 assert( obj->ops == &timer_ops );
189 return timer->signaled;
192 static int timer_satisfied( struct object *obj, struct thread *thread )
194 struct timer *timer = (struct timer *)obj;
195 assert( obj->ops == &timer_ops );
196 if (!timer->manual) timer->signaled = 0;
200 static unsigned int timer_map_access( struct object *obj, unsigned int access )
202 if (access & GENERIC_READ) access |= STANDARD_RIGHTS_READ | SYNCHRONIZE | TIMER_QUERY_STATE;
203 if (access & GENERIC_WRITE) access |= STANDARD_RIGHTS_WRITE | TIMER_MODIFY_STATE;
204 if (access & GENERIC_EXECUTE) access |= STANDARD_RIGHTS_EXECUTE;
205 if (access & GENERIC_ALL) access |= TIMER_ALL_ACCESS;
206 return access & ~(GENERIC_READ | GENERIC_WRITE | GENERIC_EXECUTE | GENERIC_ALL);
209 static void timer_destroy( struct object *obj )
211 struct timer *timer = (struct timer *)obj;
212 assert( obj->ops == &timer_ops );
214 if (timer->timeout) remove_timeout_user( timer->timeout );
215 if (timer->thread) release_object( timer->thread );
219 DECL_HANDLER(create_timer)
222 struct unicode_str name;
223 struct directory *root = NULL;
226 get_req_unicode_str( &name );
227 if (req->rootdir && !(root = get_directory_obj( current->process, req->rootdir, 0 )))
230 if ((timer = create_timer( root, &name, req->attributes, req->manual )))
232 reply->handle = alloc_handle( current->process, timer, req->access, req->attributes );
233 release_object( timer );
236 if (root) release_object( root );
239 /* open a handle to a timer */
240 DECL_HANDLER(open_timer)
242 struct unicode_str name;
243 struct directory *root = NULL;
246 get_req_unicode_str( &name );
247 if (req->rootdir && !(root = get_directory_obj( current->process, req->rootdir, 0 )))
250 if ((timer = open_object_dir( root, &name, req->attributes, &timer_ops )))
252 reply->handle = alloc_handle( current->process, &timer->obj, req->access, req->attributes );
253 release_object( timer );
256 if (root) release_object( root );
259 /* set a waitable timer */
260 DECL_HANDLER(set_timer)
264 if ((timer = (struct timer *)get_handle_obj( current->process, req->handle,
265 TIMER_MODIFY_STATE, &timer_ops )))
267 reply->signaled = set_timer( timer, &req->expire, req->period, req->callback, req->arg );
268 release_object( timer );
272 /* cancel a waitable timer */
273 DECL_HANDLER(cancel_timer)
277 if ((timer = (struct timer *)get_handle_obj( current->process, req->handle,
278 TIMER_MODIFY_STATE, &timer_ops )))
280 reply->signaled = cancel_timer( timer );
281 release_object( timer );
285 /* Get information on a waitable timer */
286 DECL_HANDLER(get_timer_info)
290 if ((timer = (struct timer *)get_handle_obj( current->process, req->handle,
291 TIMER_QUERY_STATE, &timer_ops )))
293 reply->when.sec = timer->when.tv_sec;
294 reply->when.usec = timer->when.tv_usec;
295 reply->signaled = timer->signaled;
296 release_object( timer );