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efl/legacy/eobj/lib/eobj.c

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#include <Eina.h>
#include "Eobj.h"
static int _eobj_log_dom = -1;
static Eobj_Class **_eobj_classes;
static Eobj_Class_Id _eobj_classes_last_id;
static Eina_Bool _eobj_init_count = 0;
#define CONSTRUCT_ERROR_KEY "__construct_error"
static void _eobj_callback_remove_all(Eobj *obj);
static void _eobj_generic_data_del_all(Eobj *obj);
static void eobj_class_constructor(Eobj *obj, const Eobj_Class *klass);
static void eobj_class_destructor(Eobj *obj, const Eobj_Class *klass);
#ifdef CRITICAL
#undef CRITICAL
#endif
#define CRITICAL(...) EINA_LOG_DOM_CRIT(_eobj_log_dom, __VA_ARGS__)
#ifdef ERR
#undef ERR
#endif
#define ERR(...) EINA_LOG_DOM_ERR(_eobj_log_dom, __VA_ARGS__)
#ifdef WRN
#undef WRN
#endif
#define WRN(...) EINA_LOG_DOM_WARN(_eobj_log_dom, __VA_ARGS__)
#ifdef INF
#undef INF
#endif
#define INF(...) EINA_LOG_DOM_INFO(_eobj_log_dom, __VA_ARGS__)
#ifdef DBG
#undef DBG
#endif
#define DBG(...) EINA_LOG_DOM_DBG(_eobj_log_dom, __VA_ARGS__)
typedef struct _Eobj_Callback_Description Eobj_Callback_Description;
struct _Eobj {
Eobj *parent;
const Eobj_Class *klass;
void *data_blob;
int refcount;
Eina_List *composite_objects;
Eina_Inlist *callbacks;
int walking_list;
Eina_Inlist *generic_data;
Eina_Inlist *kls_itr;
Eina_Bool delete:1;
EINA_MAGIC
};
/* Start of Dich */
/* Dich search, split to 0xff 0xff 0xffff */
#define DICH_CHAIN1_MASK (0xff)
#define DICH_CHAIN2_MASK (0xff)
#define DICH_CHAIN_LAST_MASK (0xffff)
#define DICH_CHAIN1_SIZE (DICH_CHAIN1_MASK + 1)
#define DICH_CHAIN2_SIZE (DICH_CHAIN2_MASK + 1)
#define DICH_CHAIN_LAST_SIZE (DICH_CHAIN_LAST_MASK + 1)
#define DICH_CHAIN1(x) (((x) >> 24) & DICH_CHAIN1_MASK)
#define DICH_CHAIN2(x) (((x) >> 16) & DICH_CHAIN2_MASK)
#define DICH_CHAIN_LAST(x) ((x) & DICH_CHAIN_LAST_MASK)
#define OP_CLASS_OFFSET 16
#define OP_CLASS_OFFSET_GET(x) (((x) >> OP_CLASS_OFFSET) & 0xffff)
#define OP_CLASS_GET(op) ({ \
Eobj_Class_Id tmp = OP_CLASS_OFFSET_GET(op); \
(Eobj_Class *) ((tmp <= _eobj_classes_last_id) && (tmp > 0)) ? \
(_eobj_classes[tmp - 1]) : NULL; \
})
/* Structure of Eobj_Op is:
* 16bit: class
* 16bit: op.
*/
typedef struct _Dich_Chain1 Dich_Chain1;
typedef struct
{
eobj_op_func_type func;
} op_type_funcs;
typedef struct
{
op_type_funcs *funcs;
} Dich_Chain2;
struct _Dich_Chain1
{
Dich_Chain2 *chain;
};
typedef struct
{
EINA_INLIST;
const Eobj_Class *klass;
} Eobj_Extension_Node;
struct _Eobj_Class
{
Eobj_Class_Id class_id;
const Eobj_Class *parent;
const Eobj_Class_Description *desc;
Dich_Chain1 chain[DICH_CHAIN1_SIZE];
Eina_Inlist *extensions;
const Eobj_Class **mro;
size_t data_offset; /* < Offset of the data within object data. */
Eina_Bool constructed : 1;
};
static inline eobj_op_func_type
dich_func_get(const Eobj_Class *klass, Eobj_Op op)
{
const Dich_Chain1 *chain1 = &klass->chain[DICH_CHAIN1(op)];
if (!chain1) return NULL;
if (!chain1->chain) return NULL;
Dich_Chain2 *chain2 = &chain1->chain[DICH_CHAIN2(op)];
if (!chain2) return NULL;
if (!chain2->funcs) return NULL;
/* num_ops is calculated from the class. */
const Eobj_Class *op_klass = OP_CLASS_GET(op);
if (!op_klass || (DICH_CHAIN_LAST(op) >= op_klass->desc->ops.count))
return NULL;
return chain2->funcs[DICH_CHAIN_LAST(op)].func;
}
static inline void
dich_func_set(Eobj_Class *klass, Eobj_Op op, eobj_op_func_type func)
{
const Eobj_Class *op_klass = OP_CLASS_GET(op);
size_t num_ops;
/* Verify op is valid. */
if (op_klass)
{
/* num_ops is calculated from the class. */
num_ops = op_klass->desc->ops.count;
if (DICH_CHAIN_LAST(op) >= num_ops)
{
ERR("OP %x is too big for the domain '%s', expected value < %x.",
op, op_klass->desc->name, op_klass->desc->ops.count);
}
}
else
{
ERR("OP %x is from an illegal class.", op);
return;
}
Dich_Chain1 *chain1 = &klass->chain[DICH_CHAIN1(op)];
if (!chain1->chain)
{
klass->chain[DICH_CHAIN1(op)].chain =
chain1->chain =
calloc(DICH_CHAIN2_SIZE, sizeof(*(chain1->chain)));
}
Dich_Chain2 *chain2 = &chain1->chain[DICH_CHAIN2(op)];
if (!chain2->funcs)
{
chain2->funcs = chain1->chain[DICH_CHAIN2(op)].funcs =
calloc(num_ops, sizeof(*(chain2->funcs)));
}
chain2->funcs[DICH_CHAIN_LAST(op)].func = func;
}
static inline void
dich_func_clean_all(Eobj_Class *klass)
{
int i;
Dich_Chain1 *chain1 = klass->chain;
for (i = 0 ; i < DICH_CHAIN1_SIZE ; i++, chain1++)
{
int j;
Dich_Chain2 *chain2 = chain1->chain;
if (!chain2)
continue;
for (j = 0 ; j < DICH_CHAIN2_SIZE ; j++, chain2++)
{
free(chain2->funcs);
}
free(chain1->chain);
chain1->chain = NULL;
}
}
/* END OF DICH */
typedef struct
{
EINA_INLIST;
Eobj_Op op;
const Eobj_Class **kls_itr;
} Eobj_Kls_Itr_Node;
static inline Eina_Bool
_eobj_kls_itr_init(Eobj *obj, Eobj_Op op)
{
if (obj->kls_itr)
{
Eobj_Kls_Itr_Node *node =
EINA_INLIST_CONTAINER_GET(obj->kls_itr, Eobj_Kls_Itr_Node);
if (node->op == op)
{
return EINA_FALSE;
}
}
{
Eobj_Kls_Itr_Node *node = calloc(1, sizeof(*node));
node->op = op;
node->kls_itr = obj->klass->mro;
obj->kls_itr = eina_inlist_prepend(obj->kls_itr,
EINA_INLIST_GET(node));
return EINA_TRUE;
}
}
static inline void
_eobj_kls_itr_end(Eobj *obj, Eobj_Op op)
{
Eobj_Kls_Itr_Node *node =
EINA_INLIST_CONTAINER_GET(obj->kls_itr, Eobj_Kls_Itr_Node);
if (node->op != op)
return;
obj->kls_itr = eina_inlist_remove(obj->kls_itr, obj->kls_itr);
free(node);
}
static inline const Eobj_Class *
_eobj_kls_itr_get(Eobj *obj)
{
Eobj_Kls_Itr_Node *node =
EINA_INLIST_CONTAINER_GET(obj->kls_itr, Eobj_Kls_Itr_Node);
return (node) ? *(node->kls_itr) : NULL;
}
static inline const Eobj_Class *
_eobj_kls_itr_next(Eobj *obj)
{
Eobj_Kls_Itr_Node *node =
EINA_INLIST_CONTAINER_GET(obj->kls_itr, Eobj_Kls_Itr_Node);
const Eobj_Class **kls_itr = node->kls_itr;
if (*kls_itr)
{
kls_itr++;
node->kls_itr = kls_itr;
return *kls_itr;
}
else
{
return NULL;
}
}
static inline Eina_Bool
_eobj_kls_itr_reached_end(const Eobj *obj)
{
Eobj_Kls_Itr_Node *node =
EINA_INLIST_CONTAINER_GET(obj->kls_itr, Eobj_Kls_Itr_Node);
const Eobj_Class **kls_itr = node->kls_itr;
return !(*kls_itr && *(kls_itr + 1));
}
/* FIXME: Decide if it should be fast, and if so, add a mapping.
* Otherwise, this is very slow. But since it's only for debugging... */
static const Eobj_Op_Description *
_eobj_op_id_desc_get(Eobj_Op op)
{
int i;
Eobj_Class **cls_itr = _eobj_classes;
for (i = 0 ; i < _eobj_classes_last_id ; i++, cls_itr++)
{
if (*cls_itr)
{
const Eobj_Op_Description *desc = (*cls_itr)->desc->ops.descs;
if (!desc)
continue;
Eobj_Op base_op_id = *(*cls_itr)->desc->ops.base_op_id;
while (desc->sub_op)
{
if ((base_op_id + desc->sub_op) == op)
return desc;
desc++;
}
}
}
return NULL;
}
static Eina_Bool
_eobj_op_internal(Eobj *obj, Eobj_Op op, va_list *p_list)
{
const Eobj_Class *klass;
Eina_Bool ret = EINA_FALSE;
Eina_Bool _itr_init;
_itr_init = _eobj_kls_itr_init(obj, op);
klass = _eobj_kls_itr_get(obj);
while (klass)
{
eobj_op_func_type func = dich_func_get(klass, op);
if (func)
{
func(obj, op, p_list);
ret = EINA_TRUE;
goto end;
}
klass = _eobj_kls_itr_next(obj);
}
/* Try composite objects */
{
Eina_List *itr;
Eobj *emb_obj;
EINA_LIST_FOREACH(obj->composite_objects, itr, emb_obj)
{
if (_eobj_op_internal(emb_obj, op, p_list))
{
ret = EINA_TRUE;
goto end;
}
}
}
end:
if (_itr_init) _eobj_kls_itr_end(obj, op);
return ret;
}
static inline Eina_Bool
_eobj_ops_internal(Eobj *obj, va_list *p_list)
{
Eina_Bool ret = EINA_TRUE;
Eobj_Op op = 0;
op = va_arg(*p_list, Eobj_Op);
while (op)
{
if (!_eobj_op_internal(obj, op, p_list))
{
const Eobj_Op_Description *desc = _eobj_op_id_desc_get(op);
const char *_id_name = (desc) ? desc->name : NULL;
const Eobj_Class *op_klass = OP_CLASS_GET(op);
const char *_dom_name = (op_klass) ? op_klass->desc->name : NULL;
ERR("Can't find func for op %x ('%s' of domain '%s') for class '%s'. Aborting.",
op, _id_name, _dom_name,
obj->klass->desc->name);
ret = EINA_FALSE;
break;
}
op = va_arg(*p_list, Eobj_Op);
}
return ret;
}
EAPI Eina_Bool
eobj_do_internal(Eobj *obj, ...)
{
Eina_Bool ret;
va_list p_list;
va_start(p_list, obj);
ret = _eobj_ops_internal(obj, &p_list);
va_end(p_list);
return ret;
}
EAPI Eina_Bool
eobj_super_do(Eobj *obj, Eobj_Op op, ...)
{
const Eobj_Class *obj_klass;
Eina_Bool ret = EINA_TRUE;
va_list p_list;
va_start(p_list, op);
/* Advance the kls itr. */
obj_klass = _eobj_kls_itr_next(obj);
if (!_eobj_op_internal(obj, op, &p_list))
{
const Eobj_Op_Description *desc = _eobj_op_id_desc_get(op);
const char *_id_name = (desc) ? desc->name : NULL;
const Eobj_Class *op_klass = OP_CLASS_GET(op);
const char *_dom_name = (op_klass) ? op_klass->desc->name : NULL;
ERR("Can't find func for op %x ('%s' of domain '%s') for class '%s'. Aborting.",
op, _id_name, _dom_name,
(obj_klass) ? obj_klass->desc->name : NULL);
ret = EINA_FALSE;
}
va_end(p_list);
return ret;
}
EAPI const Eobj_Class *
eobj_class_get(Eobj *obj)
{
return obj->klass;
}
EAPI const char *
eobj_class_name_get(const Eobj_Class *klass)
{
return klass->desc->name;
}
static void
_eobj_class_base_op_init(Eobj_Class *klass)
{
const Eobj_Class_Description *desc = klass->desc;
if (!desc || !desc->ops.base_op_id)
return;
/* FIXME: Depends on values defined above! */
*(desc->ops.base_op_id) = klass->class_id << OP_CLASS_OFFSET;
}
static Eina_List *
_eobj_class_mro_add(Eina_List *mro, const Eobj_Class *klass)
{
if (!klass)
return mro;
mro = eina_list_append(mro, klass);
{
Eobj_Extension_Node *extn;
EINA_INLIST_FOREACH(klass->extensions, extn)
{
mro = _eobj_class_mro_add(mro, extn->klass);
}
}
mro = _eobj_class_mro_add(mro, klass->parent);
return mro;
}
static void
_eobj_class_mro_init(Eobj_Class *klass)
{
Eina_List *mro = NULL;
DBG("Started creating MRO for class '%s'", klass->desc->name);
mro = _eobj_class_mro_add(mro, klass);
{
Eina_List *itr1, *itr2, *itr2n;
itr1 = eina_list_last(mro);
while (itr1)
{
itr2 = eina_list_prev(itr1);
while (itr2)
{
itr2n = eina_list_prev(itr2);
if (eina_list_data_get(itr1) == eina_list_data_get(itr2))
{
mro = eina_list_remove_list(mro, itr2);
}
itr2 = itr2n;
}
itr1 = eina_list_prev(itr1);
}
}
/* Copy the mro and free the list. */
{
const Eobj_Class *kls_itr;
const Eobj_Class **mro_itr;
klass->mro = calloc(sizeof(*klass->mro), eina_list_count(mro) + 1);
mro_itr = klass->mro;
EINA_LIST_FREE(mro, kls_itr)
{
*(mro_itr++) = kls_itr;
DBG("Added '%s' to MRO", kls_itr->desc->name);
}
*(mro_itr) = NULL;
}
DBG("Finished creating MRO for class '%s'", klass->desc->name);
}
static void
_eobj_class_constructor(Eobj_Class *klass)
{
if (klass->constructed)
return;
klass->constructed = EINA_TRUE;
if (klass->desc->class_constructor)
klass->desc->class_constructor(klass);
_eobj_class_mro_init(klass);
}
EAPI void
eobj_class_funcs_set(Eobj_Class *klass, const Eobj_Op_Func_Description *func_descs)
{
const Eobj_Op_Func_Description *itr;
itr = func_descs;
if (itr)
{
for ( ; itr->op != 0 ; itr++)
{
dich_func_set(klass, itr->op, itr->func);
}
}
}
EAPI Eobj_Class *
eobj_class_new(const Eobj_Class_Description *desc, const Eobj_Class *parent, ...)
{
Eobj_Class *klass;
va_list p_list;
va_start(p_list, parent);
#define _CLS_NEW_CHECK(x) \
do \
{ \
if (!x) \
{ \
ERR("%s can't be NULL! Aborting.", #x); \
return NULL; \
} \
} \
while(0)
_CLS_NEW_CHECK(desc);
_CLS_NEW_CHECK(desc->name);
klass = calloc(1, sizeof(Eobj_Class));
klass->parent = parent;
klass->class_id = ++_eobj_classes_last_id;
{
/* FIXME: Handle errors. */
Eobj_Class **tmp;
tmp = realloc(_eobj_classes, _eobj_classes_last_id * sizeof(*_eobj_classes));
_eobj_classes = tmp;
_eobj_classes[klass->class_id - 1] = klass;
}
/* Handle class extensions */
{
Eobj_Class *extn = NULL;
extn = va_arg(p_list, Eobj_Class *);
while (extn)
{
switch (extn->desc->type)
{
case EOBJ_CLASS_TYPE_REGULAR:
case EOBJ_CLASS_TYPE_REGULAR_NO_INSTANT:
/* Use it like an interface. */
case EOBJ_CLASS_TYPE_INTERFACE:
break;
case EOBJ_CLASS_TYPE_MIXIN:
{
Eobj_Extension_Node *node = calloc(1, sizeof(*node));
node->klass = extn;
klass->extensions =
eina_inlist_append(klass->extensions,
EINA_INLIST_GET(node));
}
break;
}
extn = va_arg(p_list, Eobj_Class *);
}
}
klass->desc = desc;
/* If we have a class parent, update the current offset. */
if (klass->parent)
{
/* FIXME: Make sure this alignment is enough. */
klass->data_offset = klass->parent->data_offset +
klass->parent->desc->private_size +
(sizeof(void *) -
(klass->parent->desc->private_size % sizeof(void *)));
}
_eobj_class_base_op_init(klass);
/* FIXME: Shouldn't be called here - should be called from eobj_add. */
_eobj_class_constructor(klass);
va_end(p_list);
return klass;
}
#undef _CLS_NEW_CHECK
EAPI void
eobj_class_free(Eobj_Class *klass)
{
if (klass->constructed)
{
if (klass->desc->class_destructor)
klass->desc->class_destructor(klass);
dich_func_clean_all(klass);
}
{
Eina_Inlist *itrn;
Eobj_Extension_Node *extn;
EINA_INLIST_FOREACH_SAFE(klass->extensions, itrn, extn)
{
free(extn);
}
}
free(klass->mro);
free(klass);
}
EAPI Eobj *
eobj_add(const Eobj_Class *klass, Eobj *parent)
{
if (klass->desc->type != EOBJ_CLASS_TYPE_REGULAR)
{
ERR("Class '%s' is not instantiate-able. Aborting.", klass->desc->name);
return NULL;
}
Eobj *obj = calloc(1, sizeof(*obj));
obj->klass = klass;
obj->parent = parent;
obj->refcount++;
obj->data_blob = calloc(1, klass->data_offset + klass->desc->private_size);
_eobj_kls_itr_init(obj, EOBJ_NOOP);
eobj_class_constructor(obj, klass);
if (eobj_generic_data_get(obj, CONSTRUCT_ERROR_KEY))
{
ERR("Type '%s' - One of the object constructors have failed.", klass->desc->name);
goto fail;
}
if (!_eobj_kls_itr_reached_end(obj))
{
ERR("Type '%s' - Not all of the object constructors have been executed.", klass->desc->name);
goto fail;
}
_eobj_kls_itr_end(obj, EOBJ_NOOP);
return obj;
fail:
eobj_unref(obj);
return NULL;
}
EAPI Eobj *
eobj_ref(Eobj *obj)
{
obj->refcount++;
return obj;
}
EAPI void
eobj_unref(Eobj *obj)
{
if (--(obj->refcount) == 0)
{
const Eobj_Class *klass = eobj_class_get(obj);
_eobj_kls_itr_init(obj, EOBJ_NOOP);
eobj_class_destructor(obj, klass);
if (eobj_generic_data_get(obj, CONSTRUCT_ERROR_KEY))
{
ERR("Type '%s' - One of the object destructors have failed.", klass->desc->name);
}
if (!_eobj_kls_itr_reached_end(obj))
{
ERR("Type '%s' - Not all of the object destructors have been executed.", klass->desc->name);
}
_eobj_kls_itr_end(obj, EOBJ_NOOP);
/*FIXME: add eobj_class_unref(klass) ? - just to clear the caches. */
/* If for some reason it's not empty, clear it. */
while (obj->kls_itr)
{
Eina_Inlist *nitr = nitr->next;
free(EINA_INLIST_CONTAINER_GET(obj->kls_itr, Eobj_Kls_Itr_Node));
obj->kls_itr = nitr;
}
Eina_List *itr, *itr_n;
Eobj *emb_obj;
EINA_LIST_FOREACH_SAFE(obj->composite_objects, itr, itr_n, emb_obj)
{
eobj_del(emb_obj);
obj->composite_objects =
eina_list_remove_list(obj->composite_objects, itr);
}
_eobj_callback_remove_all(obj);
if (obj->data_blob)
free(obj->data_blob);
_eobj_generic_data_del_all(obj);
free(obj);
}
}
EAPI int
eobj_ref_get(const Eobj *obj)
{
return obj->refcount;
}
EAPI void
eobj_del(Eobj *obj)
{
obj->delete = EINA_TRUE;
eobj_unref(obj);
}
EAPI Eobj *
eobj_parent_get(Eobj *obj)
{
return obj->parent;
}
EAPI void
eobj_constructor_error_set(Eobj *obj)
{
eobj_generic_data_set(obj, CONSTRUCT_ERROR_KEY, (void *) EINA_TRUE);
}
EAPI Eina_Bool
eobj_constructor_error_get(const Eobj *obj)
{
return (intptr_t) eobj_generic_data_get(obj, CONSTRUCT_ERROR_KEY);
}
static inline void
_eobj_constructor_default(Eobj *obj)
{
eobj_constructor_super(obj);
}
static inline void
_eobj_destructor_default(Eobj *obj)
{
eobj_destructor_super(obj);
}
static void
eobj_class_constructor(Eobj *obj, const Eobj_Class *klass)
{
if (!klass)
return;
if (klass->desc->constructor)
klass->desc->constructor(obj);
else
_eobj_constructor_default(obj);
}
static void
eobj_class_destructor(Eobj *obj, const Eobj_Class *klass)
{
if (!klass)
return;
if (klass->desc->destructor)
klass->desc->destructor(obj);
else
_eobj_destructor_default(obj);
}
EAPI void
eobj_constructor_super(Eobj *obj)
{
eobj_class_constructor(obj, _eobj_kls_itr_next(obj));
}
EAPI void
eobj_destructor_super(Eobj *obj)
{
eobj_class_destructor(obj, _eobj_kls_itr_next(obj));
}
EAPI void *
eobj_data_get(Eobj *obj, const Eobj_Class *klass)
{
/* FIXME: Add a check that this is of the right klass and we don't seg.
* Probably just return NULL. */
return ((char *) obj->data_blob) + klass->data_offset;
}
typedef struct
{
EINA_INLIST;
Eina_Stringshare *key;
void *data;
} Eobj_Generic_Data_Node;
static void
_eobj_generic_data_node_free(Eobj_Generic_Data_Node *node)
{
eina_stringshare_del(node->key);
free(node);
}
static void
_eobj_generic_data_del_all(Eobj *obj)
{
Eina_Inlist *nnode;
Eobj_Generic_Data_Node *node;
EINA_INLIST_FOREACH_SAFE(obj->generic_data, nnode, node)
{
obj->generic_data = eina_inlist_remove(obj->generic_data,
EINA_INLIST_GET(node));
_eobj_generic_data_node_free(node);
}
}
EAPI void *
eobj_generic_data_set(Eobj *obj, const char *key, const void *data)
{
void *prev_data;
Eobj_Generic_Data_Node *node;
if (!key) return NULL;
if (!data) return NULL;
prev_data = eobj_generic_data_del(obj, key);
node = malloc(sizeof(Eobj_Generic_Data_Node));
node->key = eina_stringshare_add(key);
node->data = (void *) data;
obj->generic_data = eina_inlist_prepend(obj->generic_data,
EINA_INLIST_GET(node));
return prev_data;
}
EAPI void *
eobj_generic_data_get(const Eobj *obj, const char *key)
{
Eobj_Generic_Data_Node *node;
if (!key) return NULL;
EINA_INLIST_FOREACH(obj->generic_data, node)
{
if (!strcmp(node->key, key))
{
((Eobj *) obj)->generic_data =
eina_inlist_promote(obj->generic_data, EINA_INLIST_GET(node));
return node->data;
}
}
return NULL;
}
EAPI void *
eobj_generic_data_del(Eobj *obj, const char *key)
{
Eobj_Generic_Data_Node *node;
if (!key) return NULL;
EINA_INLIST_FOREACH(obj->generic_data, node)
{
if (!strcmp(node->key, key))
{
void *data;
data = node->data;
obj->generic_data = eina_inlist_remove(obj->generic_data,
EINA_INLIST_GET(node));
_eobj_generic_data_node_free(node);
return data;
}
}
return NULL;
}
EAPI Eina_Bool
eobj_init(void)
{
if (_eobj_init_count++ > 0)
return EINA_TRUE;
eina_init();
_eobj_classes = NULL;
_eobj_classes_last_id = 0;
_eobj_log_dom = eina_log_domain_register("eobj", EINA_COLOR_LIGHTBLUE);
if (_eobj_log_dom < 0)
{
EINA_LOG_ERR("Could not register log domain: eobj");
return EINA_FALSE;
}
return EINA_TRUE;
}
EAPI Eina_Bool
eobj_shutdown(void)
{
int i;
Eobj_Class **cls_itr = _eobj_classes;
if (--_eobj_init_count > 0)
return EINA_TRUE;
for (i = 0 ; i < _eobj_classes_last_id ; i++, cls_itr++)
{
if (*cls_itr)
eobj_class_free(*cls_itr);
}
if (_eobj_classes)
free(_eobj_classes);
eina_log_domain_unregister(_eobj_log_dom);
_eobj_log_dom = -1;
eina_shutdown();
return EINA_TRUE;
}
EAPI void
eobj_composite_object_attach(Eobj *obj, Eobj *emb_obj)
{
eobj_ref(emb_obj);
obj->composite_objects = eina_list_prepend(obj->composite_objects, emb_obj);
}
EAPI void
eobj_composite_object_detach(Eobj *obj, Eobj *emb_obj)
{
obj->composite_objects = eina_list_remove(obj->composite_objects, emb_obj);
eobj_unref(emb_obj);
}
EAPI Eina_Bool
eobj_composite_is(Eobj *emb_obj)
{
Eobj *obj = eobj_parent_get(emb_obj);
Eina_List *itr;
Eobj *tmp;
EINA_LIST_FOREACH(obj->composite_objects, itr, tmp)
{
if (tmp == emb_obj)
return EINA_TRUE;
}
return EINA_FALSE;
}
/* Callbacks */
struct _Eobj_Callback_Description
{
EINA_INLIST;
const Eobj_Event_Description *event;
Eobj_Event_Cb func;
void *func_data;
Eobj_Callback_Priority priority;
Eina_Bool delete_me : 1;
};
/* Actually remove, doesn't care about walking list, or delete_me */
static void
_eobj_callback_remove(Eobj *obj, Eobj_Callback_Description *cb)
{
obj->callbacks = eina_inlist_remove(obj->callbacks,
EINA_INLIST_GET(cb));
free(cb);
}
/* Actually remove, doesn't care about walking list, or delete_me */
static void
_eobj_callback_remove_all(Eobj *obj)
{
Eina_Inlist *initr;
Eobj_Callback_Description *cb;
EINA_INLIST_FOREACH_SAFE(obj->callbacks, initr, cb)
{
_eobj_callback_remove(obj, cb);
}
}
static void
_eobj_callbacks_clear(Eobj *obj)
{
Eina_Inlist *itn;
Eobj_Callback_Description *cb;
/* Abort if we are currently walking the list. */
if (obj->walking_list > 0)
return;
EINA_INLIST_FOREACH_SAFE(obj->callbacks, itn, cb)
{
if (cb->delete_me)
{
_eobj_callback_remove(obj, cb);
}
}
}
static int
_callback_priority_cmp(const void *_a, const void *_b)
{
const Eobj_Callback_Description *a, *b;
a = (const Eobj_Callback_Description *) _a;
b = (const Eobj_Callback_Description *) _b;
if (a->priority < b->priority)
return -1;
else
return 1;
}
EAPI Eina_Bool
eobj_event_callback_add(Eobj *obj,
const Eobj_Event_Description *desc,
Eobj_Event_Cb cb,
const void *data)
{
return eobj_event_callback_priority_add(obj, desc,
EOBJ_CALLBACK_PRIORITY_DEFAULT, cb, data);
}
EAPI Eina_Bool
eobj_event_callback_priority_add(Eobj *obj,
const Eobj_Event_Description *desc,
Eobj_Callback_Priority priority,
Eobj_Event_Cb func,
const void *data)
{
Eobj_Callback_Description *cb = calloc(1, sizeof(*cb));
cb->event = desc;
cb->func = func;
cb->func_data = (void *) data;
cb->priority = priority;
obj->callbacks = eina_inlist_sorted_insert(obj->callbacks,
EINA_INLIST_GET(cb), _callback_priority_cmp);
eobj_event_callback_call(obj, EOBJ_SIG_CALLBACK_ADD, desc);
return EINA_TRUE;
}
EAPI void *
eobj_event_callback_del(Eobj *obj, const Eobj_Event_Description *desc, Eobj_Event_Cb func)
{
void *ret = NULL;
Eobj_Callback_Description *cb;
EINA_INLIST_FOREACH(obj->callbacks, cb)
{
if ((cb->event == desc) && (cb->func == func))
{
void *data;
data = cb->func_data;
cb->delete_me = EINA_TRUE;
_eobj_callbacks_clear(obj);
ret = data;
goto end;
}
}
end:
eobj_event_callback_call(obj, EOBJ_SIG_CALLBACK_DEL, desc);
return ret;
}
EAPI void *
eobj_event_callback_del_full(Eobj *obj, const Eobj_Event_Description *desc, Eobj_Event_Cb func, const void *user_data)
{
void *ret = NULL;
Eobj_Callback_Description *cb;
EINA_INLIST_FOREACH(obj->callbacks, cb)
{
if ((cb->event == desc) && (cb->func == func) &&
(cb->func_data == user_data))
{
void *data;
data = cb->func_data;
cb->delete_me = EINA_TRUE;
_eobj_callbacks_clear(obj);
ret = data;
goto end;
}
}
end:
eobj_event_callback_call(obj, EOBJ_SIG_CALLBACK_DEL, desc);
return ret;
}
EAPI Eina_Bool
eobj_event_callback_call(Eobj *obj, const Eobj_Event_Description *desc,
const void *event_info)
{
Eobj_Callback_Description *cb;
obj->walking_list++;
EINA_INLIST_FOREACH(obj->callbacks, cb)
{
if (!cb->delete_me && (cb->event == desc))
{
/* Abort callback calling if the func says so. */
if (!cb->func((void *) cb->func_data, obj, desc,
(void *) event_info))
{
break;
}
}
if (obj->delete)
break;
}
obj->walking_list--;
_eobj_callbacks_clear(obj);
return EINA_TRUE;
}
static Eina_Bool
_eobj_event_forwarder_callback(void *data, Eobj *obj, const Eobj_Event_Description *desc, void *event_info)
{
(void) obj;
Eobj *new_obj = (Eobj *) data;
return eobj_event_callback_call(new_obj, desc, event_info);
}
/* FIXME: Change default priority? Maybe call later? */
EAPI Eina_Bool
eobj_event_callback_forwarder_add(Eobj *obj, const Eobj_Event_Description *desc, Eobj *new_obj)
{
return eobj_event_callback_add(obj, desc, _eobj_event_forwarder_callback, new_obj);
}
EAPI Eina_Bool
eobj_event_callback_forwarder_del(Eobj *obj, const Eobj_Event_Description *desc, Eobj *new_obj)
{
eobj_event_callback_del_full(obj, desc, _eobj_event_forwarder_callback, new_obj);
return EINA_TRUE;
}
/* EOBJ_CLASS_BASE stuff */
static Eobj_Class *_my_class = NULL;
/* FIXME: Set proper type descriptions. */
EAPI const Eobj_Event_Description _EOBJ_SIG_CALLBACK_ADD =
EOBJ_EVENT_DESCRIPTION("callback,add", "?", "Called when a callback was added.");
EAPI const Eobj_Event_Description _EOBJ_SIG_CALLBACK_DEL =
EOBJ_EVENT_DESCRIPTION("callback,del", "?", "Called when a callback was deleted.");
static void
_constructor(Eobj *obj)
{
DBG("%p - %s.", obj, _my_class->desc->name);
}
static void
_destructor(Eobj *obj)
{
DBG("%p - %s.", obj, _my_class->desc->name);
}
EAPI const Eobj_Class *
eobj_base_class_get(void)
{
if (_my_class) return _my_class;
static const Eobj_Class_Description class_desc = {
"Eobj Base",
EOBJ_CLASS_TYPE_REGULAR_NO_INSTANT,
EOBJ_CLASS_DESCRIPTION_OPS(NULL, NULL, 0),
NULL,
0,
_constructor,
_destructor,
NULL,
NULL
};
return _my_class = eobj_class_new(&class_desc, NULL, NULL);
}
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