observer.h
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/* GNU mailutils - a suite of utilities for electronic mail
Copyright (C) 1999, 2000 Free Software Foundation, Inc.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Library Public License as published by
the Free Software Foundation; either version 2, 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 Library General Public License for more details.
You should have received a copy of the GNU Library General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
#ifndef _MAILUTILS_OBSERVER_H
#define _MAILUTILS_OBSERVER_H
#include <sys/types.h>
#ifndef __P
#ifdef __STDC__
#define __P(args) args
#else
#define __P(args) ()
#endif
#endif /*__P */
#ifdef __cplusplus
extern "C" {
#endif
struct _observer;
struct _observable;
typedef struct _observer* observer_t;
typedef struct _observable* observable_t;
#define MU_EVT_MAILBOX_DESTROY 0x001
#define MU_EVT_FOLDER_DESTROY 0x002
#define MU_EVT_MAILER_DESTROY 0x004
#define MU_EVT_MESSAGE_DESTROY 0x008
#define MU_EVT_MESSAGE_ADD 0x010
#define MU_EVT_MAILBOX_PROGRESS 0x020
#define MU_EVT_AUTHORITY_FAILED 0x030
#define MU_EVT_MAILBOX_CORRUPT 0x040
#define MU_EVT_MAILER_MESSAGE_SENT 0x080
#define MU_OBSERVER_NO_CHECK 1
extern int observer_create __P ((observer_t *, void *owner));
extern void observer_destroy __P ((observer_t *, void *owner));
extern void * observer_get_owner __P ((observer_t));
extern int observer_action __P ((observer_t, size_t type));
extern int observer_set_action __P ((observer_t, int (*_action) __P ((observer_t, size_t)), void *owner));
extern int observer_set_destroy __P ((observer_t, int (*_destroy) __P((observer_t)), void *owner));
extern int observer_set_flags __P ((observer_t, int flags));
extern int observable_create __P ((observable_t *, void *owner));
extern void observable_destroy __P ((observable_t *, void *owner));
extern void * observable_get_owner __P ((observable_t));
extern int observable_attach __P ((observable_t, size_t type, observer_t observer));
extern int observable_detach __P ((observable_t, observer_t observer));
extern int observable_notify __P ((observable_t, int type));
#ifdef __cplusplus
}
#endif
#endif /* _MAILUTILS_OBSERVER_H */