/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
/* camel-object.h: Base class for Camel */
/*
* Authors:
* Dan Winship <danw@ximian.com>
* Michael Zucchi <notzed@ximian.com>
*
* Copyright 2000-2004 Novell, Inc. (www.novell.com)
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of version 2 of the GNU General Public
* License as published by the Free Software Foundation.
*
* 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307
* USA
*/
#ifndef CAMEL_OBJECT_H
#define CAMEL_OBJECT_H 1
#ifdef __cplusplus
extern "C" {
#pragma }
#endif /* __cplusplus */
#include <glib.h>
#include <stdio.h> /* FILE */
#include <stdlib.h> /* size_t */
#include <stdarg.h>
#include <pthread.h>
#include <camel/camel-arg.h>
#include <camel/camel-types.h> /* this is a @##$@#SF stupid header */
/* turn on so that camel_object_class_dump_tree() dumps object instances as well */
#define CAMEL_OBJECT_TRACK_INSTANCES
typedef struct _CamelObjectClass *CamelType;
#ifdef G_DISABLE_CHECKS
#define CAMEL_CHECK_CAST(obj, ctype, ptype) ((ptype *) obj)
#define CAMEL_CHECK_CLASS_CAST(klass, ctype, ptype) ((ptype *) klass)
#else
#define CAMEL_CHECK_CAST(obj, ctype, ptype) ((ptype *) camel_object_cast ((CamelObject *)(obj), (CamelType)(ctype)))
#define CAMEL_CHECK_CLASS_CAST(klass, ctype, ptype) ((ptype *) camel_object_class_cast ((CamelObjectClass *)(klass), (CamelType)(ctype) ))
#endif
#define CAMEL_CHECK_TYPE(obj, ctype) (camel_object_is ((CamelObject *)(obj), (CamelType)(ctype) ))
#define CAMEL_CHECK_CLASS_TYPE(klass, ctype) (camel_object_class_is ((CamelObjectClass *)(klass), (CamelType)(ctype)))
extern CamelType camel_object_type;
#define CAMEL_OBJECT_TYPE (camel_object_type)
/* we can't check casts till we've got the type, use the global type variable because its cheaper */
#define CAMEL_OBJECT(obj) (CAMEL_CHECK_CAST((obj), camel_object_type, CamelObject))
#define CAMEL_OBJECT_CLASS(k) (CAMEL_CHECK_CLASS_CAST ((k), camel_object_type, CamelObjectClass))
#define CAMEL_IS_OBJECT(o) (CAMEL_CHECK_TYPE((o), camel_object_type))
#define CAMEL_IS_OBJECT_CLASS(k) (CAMEL_CHECK_CLASS_TYPE((k), camel_object_type))
#define CAMEL_OBJECT_GET_CLASS(o) ((CamelObjectClass *)(CAMEL_OBJECT(o))->klass)
#define CAMEL_OBJECT_GET_TYPE(o) ((CamelType)(CAMEL_OBJECT(o))->klass)
typedef struct _CamelObjectClass CamelObjectClass;
typedef struct _CamelObject CamelObject;
typedef unsigned int CamelObjectHookID;
typedef struct _CamelObjectMeta CamelObjectMeta;
typedef void (*CamelObjectClassInitFunc) (CamelObjectClass *);
typedef void (*CamelObjectClassFinalizeFunc) (CamelObjectClass *);
typedef void (*CamelObjectInitFunc) (CamelObject *, CamelObjectClass *);
typedef void (*CamelObjectFinalizeFunc) (CamelObject *);
typedef gboolean (*CamelObjectEventPrepFunc) (CamelObject *, gpointer);
typedef void (*CamelObjectEventHookFunc) (CamelObject *, gpointer, gpointer);
#define CAMEL_INVALID_TYPE (NULL)
/* camel object args. */
enum {
/* Get a description of the object. */
CAMEL_OBJECT_ARG_DESCRIPTION = CAMEL_ARG_FIRST, /* Get a copy of the meta-data list (should be freed) */
CAMEL_OBJECT_ARG_METADATA,
CAMEL_OBJECT_ARG_STATE_FILE,
CAMEL_OBJECT_ARG_PERSISTENT_PROPERTIES,
};
enum {
CAMEL_OBJECT_DESCRIPTION = CAMEL_OBJECT_ARG_DESCRIPTION | CAMEL_ARG_STR,
/* Returns a CamelObjectMeta list */
CAMEL_OBJECT_METADATA = CAMEL_OBJECT_ARG_METADATA | CAMEL_ARG_PTR,
/* sets where the persistent data should reside, otherwise it isn't persistent */
CAMEL_OBJECT_STATE_FILE = CAMEL_OBJECT_ARG_STATE_FILE | CAMEL_ARG_STR,
/* returns a GSList CamelProperties of persistent properties */
CAMEL_OBJECT_PERSISTENT_PROPERTIES = CAMEL_OBJECT_ARG_PERSISTENT_PROPERTIES | CAMEL_ARG_PTR,
};
enum _CamelObjectFlags {
CAMEL_OBJECT_DESTROY = (1<<0),
};
/* returned by get::CAMEL_OBJECT_METADATA */
struct _CamelObjectMeta {
struct _CamelObjectMeta *next;
char *value;
char name[1]; /* allocated as part of structure */
};
/* TODO: create a simpleobject which has no events on it, or an interface for events */
struct _CamelObject {
struct _CamelObjectClass *klass;
guint32 magic; /* only really needed for debugging ... */
/* current hooks on this object */
struct _CamelHookList *hooks;
guint32 ref_count:24;
guint32 flags:8;
#ifdef CAMEL_OBJECT_TRACK_INSTANCES
struct _CamelObject *next, *prev;
#endif
};
struct _CamelObjectClass
{
struct _CamelObjectClass *parent;
guint32 magic; /* in same spot for validation */
struct _CamelObjectClass *next, *child; /* maintain heirarchy, just for kicks */
const char *name;
void *lock; /* lock when used in threading, else just pads struct */
/*unsigned short version, revision;*/
/* if the object's bigger than 64K, it could use redesigning */
unsigned short object_size/*, object_data*/;
unsigned short klass_size/*, klass_data*/;
/* available hooks for this class */
struct _CamelHookPair *hooks;
/* memchunks for this type */
struct _EMemChunk *instance_chunks;
#ifdef CAMEL_OBJECT_TRACK_INSTANCES
struct _CamelObject *instances;
#endif
/* init class */
void (*klass_init)(struct _CamelObjectClass *);
void (*klass_finalise)(struct _CamelObjectClass *);
/* init/finalise object */
void (*init)(struct _CamelObject *, struct _CamelObjectClass *);
void (*finalise)(struct _CamelObject *);
/* get/set interface */
int (*setv)(struct _CamelObject *, struct _CamelException *ex, CamelArgV *args);
int (*getv)(struct _CamelObject *, struct _CamelException *ex, CamelArgGetV *args);
/* we only free 1 at a time, and only pointer types, obviously */
void (*free)(struct _CamelObject *, guint32 tag, void *ptr);
/* get/set meta-data interface */
char *(*meta_get)(struct _CamelObject *, const char * name);
gboolean (*meta_set)(struct _CamelObject *, const char * name, const char *value);
/* persistence stuff */
int (*state_read)(struct _CamelObject *, FILE *fp);
int (*state_write)(struct _CamelObject *, FILE *fp);
};
/* The type system .... it's pretty simple..... */
void camel_type_init (void);
CamelType camel_type_register(CamelType parent, const char * name, /*unsigned int ver, unsigned int rev,*/
size_t instance_size,
size_t classfuncs_size,
CamelObjectClassInitFunc class_init,
CamelObjectClassFinalizeFunc class_finalize,
CamelObjectInitFunc instance_init,
CamelObjectFinalizeFunc instance_finalize);
/* deprecated interface */
#define camel_type_get_global_classfuncs(x) ((CamelObjectClass *)(x))
/* object class methods (types == classes now) */
const char *camel_type_to_name (CamelType type);
CamelType camel_name_to_type (const char *name);
void camel_object_class_add_event (CamelObjectClass *klass, const char *name, CamelObjectEventPrepFunc prep);
void camel_object_class_dump_tree (CamelType root);
/* casting */
CamelObject *camel_object_cast(CamelObject *obj, CamelType ctype);
gboolean camel_object_is(CamelObject *obj, CamelType ctype);
CamelObjectClass *camel_object_class_cast (CamelObjectClass *klass, CamelType ctype);
gboolean camel_object_class_is (CamelObjectClass *klass, CamelType ctype);
CamelType camel_object_get_type (void);
CamelObject *camel_object_new (CamelType type);
CamelObject *camel_object_new_name (const char *name);
void camel_object_ref(void *);
void camel_object_unref(void *);
#ifdef CAMEL_DEBUG
#define camel_object_ref(o) (printf("%s (%s:%d):ref (%p)\n", __FUNCTION__, __FILE__, __LINE__, o), camel_object_ref(o))
#define camel_object_unref(o) (printf("%s (%s:%d):unref (%p)\n", __FUNCTION__, __FILE__, __LINE__, o), camel_object_unref (o))
#endif
/* hooks */
CamelObjectHookID camel_object_hook_event(void *obj, const char *name, CamelObjectEventHookFunc hook, void *data);
void camel_object_remove_event(void *obj, CamelObjectHookID id);
void camel_object_unhook_event(void *obj, const char *name, CamelObjectEventHookFunc hook, void *data);
void camel_object_trigger_event(void *obj, const char *name, void *event_data);
/* get/set methods */
int camel_object_set(void *obj, struct _CamelException *ex, ...);
int camel_object_setv(void *obj, struct _CamelException *ex, CamelArgV *);
int camel_object_get(void *obj, struct _CamelException *ex, ...);
int camel_object_getv(void *obj, struct _CamelException *ex, CamelArgGetV *);
/* not very efficient one-time calls */
void *camel_object_get_ptr(void *vo, CamelException *ex, int tag);
int camel_object_get_int(void *vo, CamelException *ex, int tag);
/* meta-data for user-specific data */
char *camel_object_meta_get(void *vo, const char * name);
gboolean camel_object_meta_set(void *vo, const char * name, const char *value);
/* reads/writes the state from/to the CAMEL_OBJECT_STATE_FILE */
int camel_object_state_read(void *vo);
int camel_object_state_write(void *vo);
/* free a retrieved object. May be a noop for static data. */
void camel_object_free(void *vo, guint32 tag, void *value);
/* for managing bags of weakly-ref'd 'child' objects */
typedef struct _CamelObjectBag CamelObjectBag;
typedef void *(*CamelCopyFunc)(const void *vo);
CamelObjectBag *camel_object_bag_new(GHashFunc hash, GEqualFunc equal, CamelCopyFunc keycopy, GFreeFunc keyfree);
void *camel_object_bag_get(CamelObjectBag *bag, const void *key);
void *camel_object_bag_peek(CamelObjectBag *bag, const void *key);
void *camel_object_bag_reserve(CamelObjectBag *bag, const void *key);
void camel_object_bag_add(CamelObjectBag *bag, const void *key, void *o);
void camel_object_bag_abort(CamelObjectBag *bag, const void *key);
void camel_object_bag_rekey(CamelObjectBag *bag, void *o, const void *newkey);
GPtrArray *camel_object_bag_list(CamelObjectBag *bag);
void camel_object_bag_remove(CamelObjectBag *bag, void *o);
void camel_object_bag_destroy(CamelObjectBag *bag);
#define CAMEL_MAKE_CLASS(type, tname, parent, pname) \
static CamelType type##_type; \
static pname##Class * type##_parent_class; \
\
CamelType \
type##_get_type(void) \
{ \
if (type##_type == 0) { \
type##_parent_class = (pname##Class *)parent##_get_type(); \
type##_type = camel_type_register( \
type##_parent_class, #tname "Class", \
sizeof(tname), \
sizeof(tname ## Class), \
(CamelObjectClassInitFunc) type##_class_init, \
NULL, \
(CamelObjectInitFunc) type##_init, \
(CamelObjectFinalizeFunc) type##_finalise); \
} \
\
return type##_type; \
}
#ifdef __cplusplus
}
#endif /* __cplusplus */
#endif /* CAMEL_OBJECT_H */
