2010-08-08 10:06:34 +02:00
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/*
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Copyright (c) 1998-2010, Enno Rehling <enno@eressea.de>
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Katja Zedel <katze@felidae.kn-bremen.de
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Christian Schlittchen <corwin@amber.kn-bremen.de>
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Permission to use, copy, modify, and/or distribute this software for any
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purpose with or without fee is hereby granted, provided that the above
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copyright notice and this permission notice appear in all copies.
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THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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**/
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#ifndef EVENT_H
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#define EVENT_H
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#ifdef __cplusplus
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extern "C" {
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#endif
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#include "variant.h"
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struct attrib;
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struct trigger;
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struct storage;
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typedef struct trigger_type {
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const char * name;
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void (*initialize)(struct trigger *);
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void (*finalize)(struct trigger *);
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int (*handle)(struct trigger *, void *);
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void (*write)(const struct trigger *, struct storage * store);
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int (*read)(struct trigger *, struct storage * store);
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struct trigger_type * next;
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} trigger_type;
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extern trigger_type * tt_find(const char * name);
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extern void tt_register(trigger_type * ttype);
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typedef struct trigger {
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struct trigger_type * type;
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struct trigger * next;
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variant data;
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} trigger;
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typedef struct event_arg {
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const char * type;
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variant data;
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} event_arg;
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extern trigger * t_new(trigger_type * ttype);
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extern void t_free(trigger * t);
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extern void t_add(trigger ** tlist, trigger * t);
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/** add and handle triggers **/
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/* add a trigger to a list of attributes */
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extern void add_trigger(struct attrib ** ap, const char * eventname, struct trigger * t);
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extern void remove_triggers(struct attrib ** ap, const char * eventname, const trigger_type * tt);
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extern struct trigger ** get_triggers(struct attrib * ap, const char * eventname);
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/* calls handle() for each of these. e.g. used in timeout */
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extern void handle_event(struct attrib * attribs, const char * eventname, void * data);
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/* functions for making complex triggers: */
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extern void free_triggers(trigger * triggers); /* release all these triggers */
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extern void write_triggers(struct storage * store, const trigger * t);
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extern int read_triggers(struct storage * store, trigger ** tp);
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extern int handle_triggers(trigger ** triggers, void * data);
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extern struct attrib_type at_eventhandler;
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#ifdef __cplusplus
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}
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#endif
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#endif
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