134 lines
3.5 KiB
C
134 lines
3.5 KiB
C
/*
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* Server-side event management
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*
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* Copyright (C) 1998 Alexandre Julliard
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*/
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#include <assert.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include "winerror.h"
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#include "winnt.h"
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#include "server/thread.h"
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struct event
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{
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struct object obj; /* object header */
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int manual_reset; /* is it a manual reset event? */
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int signaled; /* event has been signaled */
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};
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static void event_dump( struct object *obj, int verbose );
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static int event_signaled( struct object *obj, struct thread *thread );
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static int event_satisfied( struct object *obj, struct thread *thread );
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static void event_destroy( struct object *obj );
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static const struct object_ops event_ops =
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{
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event_dump,
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add_queue,
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remove_queue,
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event_signaled,
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event_satisfied,
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no_read_fd,
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no_write_fd,
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no_flush,
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no_get_file_info,
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event_destroy
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};
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struct object *create_event( const char *name, int manual_reset, int initial_state )
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{
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struct event *event;
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if (!(event = (struct event *)create_named_object( name, &event_ops, sizeof(*event) )))
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return NULL;
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if (GET_ERROR() != ERROR_ALREADY_EXISTS)
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{
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/* initialize it if it didn't already exist */
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event->manual_reset = manual_reset;
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event->signaled = initial_state;
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}
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return &event->obj;
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}
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int open_event( unsigned int access, int inherit, const char *name )
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{
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return open_object( name, &event_ops, access, inherit );
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}
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int pulse_event( int handle )
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{
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struct event *event;
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if (!(event = (struct event *)get_handle_obj( current->process, handle,
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EVENT_MODIFY_STATE, &event_ops )))
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return 0;
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event->signaled = 1;
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/* wake up all waiters if manual reset, a single one otherwise */
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wake_up( &event->obj, !event->manual_reset );
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event->signaled = 0;
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release_object( event );
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return 1;
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}
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int set_event( int handle )
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{
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struct event *event;
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if (!(event = (struct event *)get_handle_obj( current->process, handle,
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EVENT_MODIFY_STATE, &event_ops )))
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return 0;
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event->signaled = 1;
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/* wake up all waiters if manual reset, a single one otherwise */
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wake_up( &event->obj, !event->manual_reset );
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release_object( event );
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return 1;
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}
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int reset_event( int handle )
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{
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struct event *event;
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if (!(event = (struct event *)get_handle_obj( current->process, handle,
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EVENT_MODIFY_STATE, &event_ops )))
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return 0;
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event->signaled = 0;
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release_object( event );
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return 1;
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}
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static void event_dump( struct object *obj, int verbose )
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{
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struct event *event = (struct event *)obj;
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assert( obj->ops == &event_ops );
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fprintf( stderr, "Event manual=%d signaled=%d name='%s'\n",
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event->manual_reset, event->signaled,
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get_object_name( &event->obj ) );
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}
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static int event_signaled( struct object *obj, struct thread *thread )
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{
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struct event *event = (struct event *)obj;
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assert( obj->ops == &event_ops );
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return event->signaled;
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}
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static int event_satisfied( struct object *obj, struct thread *thread )
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{
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struct event *event = (struct event *)obj;
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assert( obj->ops == &event_ops );
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/* Reset if it's an auto-reset event */
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if (!event->manual_reset) event->signaled = 0;
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return 0; /* Not abandoned */
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}
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static void event_destroy( struct object *obj )
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{
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struct event *event = (struct event *)obj;
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assert( obj->ops == &event_ops );
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free( event );
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}
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