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
=
31 sizeof(struct event
), /* size */
32 event_dump
, /* dump */
33 add_queue
, /* add_queue */
34 remove_queue
, /* remove_queue */
35 event_signaled
, /* signaled */
36 event_satisfied
, /* satisfied */
37 NULL
, /* get_poll_events */
38 NULL
, /* poll_event */
39 no_read_fd
, /* get_read_fd */
40 no_write_fd
, /* get_write_fd */
42 no_get_file_info
, /* get_file_info */
43 no_destroy
/* destroy */
47 static struct event
*create_event( const WCHAR
*name
, size_t len
,
48 int manual_reset
, int initial_state
)
52 if ((event
= create_named_object( &event_ops
, name
, len
)))
54 if (get_error() != ERROR_ALREADY_EXISTS
)
56 /* initialize it if it didn't already exist */
57 event
->manual_reset
= manual_reset
;
58 event
->signaled
= initial_state
;
64 struct event
*get_event_obj( struct process
*process
, int handle
, unsigned int access
)
66 return (struct event
*)get_handle_obj( process
, handle
, access
, &event_ops
);
69 void pulse_event( struct event
*event
)
72 /* wake up all waiters if manual reset, a single one otherwise */
73 wake_up( &event
->obj
, !event
->manual_reset
);
77 void set_event( struct event
*event
)
80 /* wake up all waiters if manual reset, a single one otherwise */
81 wake_up( &event
->obj
, !event
->manual_reset
);
84 void reset_event( struct event
*event
)
89 static void event_dump( struct object
*obj
, int verbose
)
91 struct event
*event
= (struct event
*)obj
;
92 assert( obj
->ops
== &event_ops
);
93 fprintf( stderr
, "Event manual=%d signaled=%d ",
94 event
->manual_reset
, event
->signaled
);
95 dump_object_name( &event
->obj
);
96 fputc( '\n', stderr
);
99 static int event_signaled( struct object
*obj
, struct thread
*thread
)
101 struct event
*event
= (struct event
*)obj
;
102 assert( obj
->ops
== &event_ops
);
103 return event
->signaled
;
106 static int event_satisfied( struct object
*obj
, struct thread
*thread
)
108 struct event
*event
= (struct event
*)obj
;
109 assert( obj
->ops
== &event_ops
);
110 /* Reset if it's an auto-reset event */
111 if (!event
->manual_reset
) event
->signaled
= 0;
112 return 0; /* Not abandoned */
115 /* create an event */
116 DECL_HANDLER(create_event
)
118 size_t len
= get_req_strlenW( req
->name
);
122 if ((event
= create_event( req
->name
, len
, req
->manual_reset
, req
->initial_state
)))
124 req
->handle
= alloc_handle( current
->process
, event
, EVENT_ALL_ACCESS
, req
->inherit
);
125 release_object( event
);
129 /* open a handle to an event */
130 DECL_HANDLER(open_event
)
132 size_t len
= get_req_strlenW( req
->name
);
133 req
->handle
= open_object( req
->name
, len
, &event_ops
, req
->access
, req
->inherit
);
136 /* do an event operation */
137 DECL_HANDLER(event_op
)
141 if (!(event
= get_event_obj( current
->process
, req
->handle
, EVENT_MODIFY_STATE
))) return;
145 pulse_event( event
);
151 reset_event( event
);
154 fatal_protocol_error( current
, "event_op: invalid operation %d\n", req
->op
);
156 release_object( event
);