#ifndef SOCKS_OBJECT_H_
#define SOCKS_OBJECT_H_

#include <socks/locks.h>
#include <socks/status.h>
#include <socks/vm.h>
#include <stddef.h>

#ifdef __cplusplus
extern "C" {
#endif

#define OBJECT_MAGIC 0xBADDCAFE
#define OBJECT_NAME_MAX 64

struct object;
struct object_attrib;

typedef enum object_type_flags {
	OBJTYPE_INIT = 0x01u,
} object_type_flags_t;

typedef struct object_ops {
	kern_status_t(*open)(struct object *obj);
	kern_status_t(*close)(struct object *obj);
	kern_status_t(*destroy)(struct object *obj);
	kern_status_t(*query_name)(struct object *obj, char out[OBJECT_NAME_MAX]);
	kern_status_t(*parse)(struct object *obj, const char *path, struct object **out);
	kern_status_t(*get_named)(struct object *obj, const char *name, struct object **out);
	kern_status_t(*get_at)(struct object *obj, size_t at, struct object **out);
	kern_status_t(*read_attrib)(struct object *obj, struct object_attrib *attrib, char *out, size_t max, size_t *r);
	kern_status_t(*write_attrib)(struct object *obj, struct object_attrib *attrib, const char *s, size_t len, size_t *r);
} object_ops_t;

typedef struct object_attrib {
	char *a_name;
	queue_entry_t a_list;
} object_attrib_t;

typedef struct object_type {
	object_type_flags_t ob_flags;
	char ob_name[32];
	unsigned int ob_size;
	vm_cache_t ob_cache;
	queue_entry_t ob_list;
	queue_t ob_attrib;
	object_ops_t ob_ops;
} object_type_t;

typedef struct object {
	uint32_t ob_magic;
	struct object *ob_parent;
	object_type_t *ob_type;
	spin_lock_t ob_lock;
	unsigned int ob_refcount;
	unsigned int ob_handles;
	queue_t ob_attrib;
	queue_entry_t ob_list;
} __aligned(sizeof(long)) object_t;

typedef struct object_namespace object_namespace_t;

extern kern_status_t object_bootstrap(void);
extern kern_status_t object_type_register(object_type_t *p);
extern kern_status_t object_type_unregister(object_type_t *p);

extern object_namespace_t *global_namespace(void);
extern object_namespace_t *object_namespace_create(void);
extern kern_status_t object_namespace_get_object(object_namespace_t *ns, const char *path, object_t **out);
extern kern_status_t object_publish(object_namespace_t *ns, const char *path, object_t *obj);
extern kern_status_t object_unpublish(object_namespace_t *ns, object_t *obj);

extern object_t *object_create(object_type_t *type);
extern object_t *object_ref(object_t *obj);
extern void object_deref(object_t *obj);
extern void object_lock(object_t *obj, unsigned long *flags);
extern void object_unlock(object_t *obj, unsigned long flags);
extern void *object_data(object_t *obj);
extern object_t *object_header(void *p);
static inline kern_status_t object_get(const char *path, object_t **out)
{
	return object_namespace_get_object(global_namespace(), path, out);
}
extern kern_status_t object_get_child_named(object_t *obj, const char *name, object_t **out);
extern kern_status_t object_get_child_at(object_t *obj, size_t at, object_t **out);
extern kern_status_t object_query_name(object_t *obj, char name[OBJECT_NAME_MAX]);

extern object_t *set_create(const char *name);
extern kern_status_t set_add_object(object_t *set, object_t *obj);
extern kern_status_t set_remove_object(object_t *set, object_t *obj);
extern bool object_is_set(object_t *obj);

extern void init_set_objects(void);
extern void init_global_namespace(void);

#ifdef __cplusplus
}
#endif

#endif