2 * Server-side event management
4 * Copyright (C) 1998 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"
37 struct object obj; /* object header */
38 int manual_reset; /* is it a manual reset event? */
39 int signaled; /* event has been signaled */
42 static void event_dump( struct object *obj, int verbose );
43 static int event_signaled( struct object *obj, struct thread *thread );
44 static int event_satisfied( struct object *obj, struct thread *thread );
45 static int event_signal( struct object *obj, unsigned int access);
47 static const struct object_ops event_ops =
49 sizeof(struct event), /* size */
50 event_dump, /* dump */
51 add_queue, /* add_queue */
52 remove_queue, /* remove_queue */
53 event_signaled, /* signaled */
54 event_satisfied, /* satisfied */
55 event_signal, /* signal */
56 no_get_fd, /* get_fd */
57 no_close_handle, /* close_handle */
58 no_destroy /* destroy */
62 struct event *create_event( const WCHAR *name, size_t len, unsigned int attr,
63 int manual_reset, int initial_state )
67 if ((event = create_named_object( sync_namespace, &event_ops, name, len, attr )))
69 if (get_error() != STATUS_OBJECT_NAME_COLLISION)
71 /* initialize it if it didn't already exist */
72 event->manual_reset = manual_reset;
73 event->signaled = initial_state;
79 struct event *get_event_obj( struct process *process, obj_handle_t handle, unsigned int access )
81 return (struct event *)get_handle_obj( process, handle, access, &event_ops );
84 void pulse_event( struct event *event )
87 /* wake up all waiters if manual reset, a single one otherwise */
88 wake_up( &event->obj, !event->manual_reset );
92 void set_event( struct event *event )
95 /* wake up all waiters if manual reset, a single one otherwise */
96 wake_up( &event->obj, !event->manual_reset );
99 void reset_event( struct event *event )
104 static void event_dump( struct object *obj, int verbose )
106 struct event *event = (struct event *)obj;
107 assert( obj->ops == &event_ops );
108 fprintf( stderr, "Event manual=%d signaled=%d ",
109 event->manual_reset, event->signaled );
110 dump_object_name( &event->obj );
111 fputc( '\n', stderr );
114 static int event_signaled( struct object *obj, struct thread *thread )
116 struct event *event = (struct event *)obj;
117 assert( obj->ops == &event_ops );
118 return event->signaled;
121 static int event_satisfied( struct object *obj, struct thread *thread )
123 struct event *event = (struct event *)obj;
124 assert( obj->ops == &event_ops );
125 /* Reset if it's an auto-reset event */
126 if (!event->manual_reset) event->signaled = 0;
127 return 0; /* Not abandoned */
130 static int event_signal( struct object *obj, unsigned int access )
132 struct event *event = (struct event *)obj;
133 assert( obj->ops == &event_ops );
135 if (!(access & EVENT_MODIFY_STATE))
137 set_error( STATUS_ACCESS_DENIED );
144 /* create an event */
145 DECL_HANDLER(create_event)
150 if ((event = create_event( get_req_data(), get_req_data_size(), req->attributes,
151 req->manual_reset, req->initial_state )))
153 reply->handle = alloc_handle( current->process, event, req->access,
154 req->attributes & OBJ_INHERIT );
155 release_object( event );
159 /* open a handle to an event */
160 DECL_HANDLER(open_event)
162 reply->handle = open_object( sync_namespace, get_req_data(), get_req_data_size(),
163 &event_ops, req->access, req->attributes );
166 /* do an event operation */
167 DECL_HANDLER(event_op)
171 if (!(event = get_event_obj( current->process, req->handle, EVENT_MODIFY_STATE ))) return;
175 pulse_event( event );
181 reset_event( event );
184 fatal_protocol_error( current, "event_op: invalid operation %d\n", req->op );
186 release_object( event );