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/* upstart
*
* Copyright © 2006 Canonical Ltd.
* Author: Scott James Remnant <scott@ubuntu.com>.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef INIT_EVENT_H
#define INIT_EVENT_H
#include <nih/macros.h>
#include <nih/list.h>
#include <nih/main.h>
/**
* Event:
* @entry: list header,
* @name: string name of the event; namespace shared with jobs,
* @value: current or expected value for level events.
*
* We talk about two types of events, level events which have a @value
* associated and edge events which do not (@value is %NULL). The change
* of any level event's @value is also considered an edge event.
*
* This structure is used within the event code to hold a record of previously
* seen events and the current value of level events; it is also
* used within the job code to hold the list of events a job is waiting for.
**/
typedef struct event {
NihList entry;
char *name;
char *value;
} Event;
NIH_BEGIN_EXTERN
Event *event_new (void *parent, const char *name)
__attribute__ ((warn_unused_result, malloc));
Event *event_record (void *parent, const char *name);
Event *event_find_by_name (const char *name);
int event_match (Event *event1, Event *event2);
int event_change_value (Event *event, const char *value);
Event *event_queue_edge (const char *name);
Event *event_queue_level (const char *name, const char *value);
void event_queue_run (void *data, NihMainLoopFunc *func);
NIH_END_EXTERN
#endif /* INIT_EVENT_H */
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