2 * Server-side event management
4 * Copyright (C) 1998 Alexandre Julliard
20 struct object obj
; /* object header */
21 int manual_reset
; /* is it a manual reset event? */
22 int signaled
; /* event has been signaled */
25 static void event_dump( struct object
*obj
, int verbose
);
26 static int event_signaled( struct object
*obj
, struct thread
*thread
);
27 static int event_satisfied( struct object
*obj
, struct thread
*thread
);
29 static const struct object_ops event_ops
=
45 static struct event
*create_event( const WCHAR
*name
, size_t len
,
46 int manual_reset
, int initial_state
)
50 if ((event
= create_named_object( &event_ops
, name
, len
)))
52 if (get_error() != ERROR_ALREADY_EXISTS
)
54 /* initialize it if it didn't already exist */
55 event
->manual_reset
= manual_reset
;
56 event
->signaled
= initial_state
;
62 struct event
*get_event_obj( struct process
*process
, int handle
, unsigned int access
)
64 return (struct event
*)get_handle_obj( process
, handle
, access
, &event_ops
);
67 void pulse_event( struct event
*event
)
70 /* wake up all waiters if manual reset, a single one otherwise */
71 wake_up( &event
->obj
, !event
->manual_reset
);
75 void set_event( struct event
*event
)
78 /* wake up all waiters if manual reset, a single one otherwise */
79 wake_up( &event
->obj
, !event
->manual_reset
);
82 void reset_event( struct event
*event
)
87 static void event_dump( struct object
*obj
, int verbose
)
89 struct event
*event
= (struct event
*)obj
;
90 assert( obj
->ops
== &event_ops
);
91 fprintf( stderr
, "Event manual=%d signaled=%d ",
92 event
->manual_reset
, event
->signaled
);
93 dump_object_name( &event
->obj
);
94 fputc( '\n', stderr
);
97 static int event_signaled( struct object
*obj
, struct thread
*thread
)
99 struct event
*event
= (struct event
*)obj
;
100 assert( obj
->ops
== &event_ops
);
101 return event
->signaled
;
104 static int event_satisfied( struct object
*obj
, struct thread
*thread
)
106 struct event
*event
= (struct event
*)obj
;
107 assert( obj
->ops
== &event_ops
);
108 /* Reset if it's an auto-reset event */
109 if (!event
->manual_reset
) event
->signaled
= 0;
110 return 0; /* Not abandoned */
113 /* create an event */
114 DECL_HANDLER(create_event
)
116 size_t len
= get_req_strlenW( req
->name
);
120 if ((event
= create_event( req
->name
, len
, req
->manual_reset
, req
->initial_state
)))
122 req
->handle
= alloc_handle( current
->process
, event
, EVENT_ALL_ACCESS
, req
->inherit
);
123 release_object( event
);
127 /* open a handle to an event */
128 DECL_HANDLER(open_event
)
130 size_t len
= get_req_strlenW( req
->name
);
131 req
->handle
= open_object( req
->name
, len
, &event_ops
, req
->access
, req
->inherit
);
134 /* do an event operation */
135 DECL_HANDLER(event_op
)
139 if (!(event
= get_event_obj( current
->process
, req
->handle
, EVENT_MODIFY_STATE
))) return;
143 pulse_event( event
);
149 reset_event( event
);
152 fatal_protocol_error( current
, "event_op: invalid operation %d\n", req
->op
);
154 release_object( event
);