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 unsigned int period; /* timer period in ms */
46 timeout_t 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_open_file, /* open_file */
72 no_close_handle, /* close_handle */
73 timer_destroy /* destroy */
77 /* create a timer object */
78 static struct timer *create_timer( struct directory *root, const struct unicode_str *name,
79 unsigned int attr, int manual )
83 if ((timer = create_named_object_dir( root, name, attr, &timer_ops )))
85 if (get_error() != STATUS_OBJECT_NAME_EXISTS)
87 /* initialize it if it didn't already exist */
88 timer->manual = manual;
92 timer->timeout = NULL;
99 /* callback on timer expiration */
100 static void timer_callback( void *private )
102 struct timer *timer = (struct timer *)private;
109 memset( &data, 0, sizeof(data) );
112 data.type = APC_TIMER;
113 data.timer.func = timer->callback;
114 data.timer.time = timer->when;
115 data.timer.arg = timer->arg;
117 else data.type = APC_NONE; /* wake up only */
119 if (!thread_queue_apc( timer->thread, &timer->obj, &data ))
121 release_object( timer->thread );
122 timer->thread = NULL;
126 if (timer->period) /* schedule the next expiration */
128 timer->when += (timeout_t)timer->period * 10000;
129 timer->timeout = add_timeout_user( timer->when, timer_callback, timer );
131 else timer->timeout = NULL;
133 /* wake up waiters */
135 wake_up( &timer->obj, 0 );
138 /* cancel a running timer */
139 static int cancel_timer( struct timer *timer )
141 int signaled = timer->signaled;
145 remove_timeout_user( timer->timeout );
146 timer->timeout = NULL;
150 thread_cancel_apc( timer->thread, &timer->obj, APC_TIMER );
151 release_object( timer->thread );
152 timer->thread = NULL;
157 /* set the timer expiration and period */
158 static int set_timer( struct timer *timer, timeout_t expire, unsigned int period,
159 void *callback, void *arg )
161 int signaled = cancel_timer( timer );
164 period = 0; /* period doesn't make any sense for a manual timer */
167 timer->when = (expire <= 0) ? current_time - expire : max( expire, current_time );
168 timer->period = period;
169 timer->callback = callback;
171 if (callback) timer->thread = (struct thread *)grab_object( current );
172 timer->timeout = add_timeout_user( timer->when, timer_callback, timer );
176 static void timer_dump( struct object *obj, int verbose )
178 struct timer *timer = (struct timer *)obj;
179 assert( obj->ops == &timer_ops );
180 fprintf( stderr, "Timer manual=%d when=%s period=%u ",
181 timer->manual, get_timeout_str(timer->when), timer->period );
182 dump_object_name( &timer->obj );
183 fputc( '\n', stderr );
186 static int timer_signaled( struct object *obj, struct thread *thread )
188 struct timer *timer = (struct timer *)obj;
189 assert( obj->ops == &timer_ops );
190 return timer->signaled;
193 static int timer_satisfied( struct object *obj, struct thread *thread )
195 struct timer *timer = (struct timer *)obj;
196 assert( obj->ops == &timer_ops );
197 if (!timer->manual) timer->signaled = 0;
201 static unsigned int timer_map_access( struct object *obj, unsigned int access )
203 if (access & GENERIC_READ) access |= STANDARD_RIGHTS_READ | SYNCHRONIZE | TIMER_QUERY_STATE;
204 if (access & GENERIC_WRITE) access |= STANDARD_RIGHTS_WRITE | TIMER_MODIFY_STATE;
205 if (access & GENERIC_EXECUTE) access |= STANDARD_RIGHTS_EXECUTE;
206 if (access & GENERIC_ALL) access |= TIMER_ALL_ACCESS;
207 return access & ~(GENERIC_READ | GENERIC_WRITE | GENERIC_EXECUTE | GENERIC_ALL);
210 static void timer_destroy( struct object *obj )
212 struct timer *timer = (struct timer *)obj;
213 assert( obj->ops == &timer_ops );
215 if (timer->timeout) remove_timeout_user( timer->timeout );
216 if (timer->thread) release_object( timer->thread );
220 DECL_HANDLER(create_timer)
223 struct unicode_str name;
224 struct directory *root = NULL;
227 get_req_unicode_str( &name );
228 if (req->rootdir && !(root = get_directory_obj( current->process, req->rootdir, 0 )))
231 if ((timer = create_timer( root, &name, req->attributes, req->manual )))
233 reply->handle = alloc_handle( current->process, timer, req->access, req->attributes );
234 release_object( timer );
237 if (root) release_object( root );
240 /* open a handle to a timer */
241 DECL_HANDLER(open_timer)
243 struct unicode_str name;
244 struct directory *root = NULL;
247 get_req_unicode_str( &name );
248 if (req->rootdir && !(root = get_directory_obj( current->process, req->rootdir, 0 )))
251 if ((timer = open_object_dir( root, &name, req->attributes, &timer_ops )))
253 reply->handle = alloc_handle( current->process, &timer->obj, req->access, req->attributes );
254 release_object( timer );
257 if (root) release_object( root );
260 /* set a waitable timer */
261 DECL_HANDLER(set_timer)
265 if ((timer = (struct timer *)get_handle_obj( current->process, req->handle,
266 TIMER_MODIFY_STATE, &timer_ops )))
268 reply->signaled = set_timer( timer, req->expire, req->period, req->callback, req->arg );
269 release_object( timer );
273 /* cancel a waitable timer */
274 DECL_HANDLER(cancel_timer)
278 if ((timer = (struct timer *)get_handle_obj( current->process, req->handle,
279 TIMER_MODIFY_STATE, &timer_ops )))
281 reply->signaled = cancel_timer( timer );
282 release_object( timer );
286 /* Get information on a waitable timer */
287 DECL_HANDLER(get_timer_info)
291 if ((timer = (struct timer *)get_handle_obj( current->process, req->handle,
292 TIMER_QUERY_STATE, &timer_ops )))
294 reply->when = timer->when;
295 reply->signaled = timer->signaled;
296 release_object( timer );