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efl/src/lib/eo/eo.c

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#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#include <Eina.h>
#include "Eo.h"
#include "eo_private.h"
/* The last id that should be reserved for statically allocated classes. */
#define EO_CLASS_IDS_FIRST 1
#define EO_OP_IDS_FIRST 1
/* Used inside the class_get functions of classes, see #EO_DEFINE_CLASS */
EAPI Eina_Lock _eo_class_creation_lock;
int _eo_log_dom = -1;
static Eo_Class **_eo_classes;
static Eo_Class_Id _eo_classes_last_id;
static Eina_Bool _eo_init_count = 0;
static Eo_Op _eo_ops_last_id = 0;
static void _eo_condtor_reset(Eo *obj);
static inline void *_eo_data_get(const Eo *obj, const Eo_Class *klass);
static inline Eo *_eo_ref(Eo *obj);
static inline void _eo_unref(Eo *obj);
static const Eo_Class *_eo_op_class_get(Eo_Op op);
static const Eo_Op_Description *_eo_op_id_desc_get(Eo_Op op);
typedef struct
{
const Eo_Class *kls;
} Eo_Kls_Itr;
struct _Eo {
EINA_MAGIC
EINA_INLIST;
Eo *parent;
Eina_Inlist *children;
const Eo_Class *klass;
int refcount;
#ifndef NDEBUG
Eina_Inlist *xrefs;
#endif
Eina_List *composite_objects;
Eo_Kls_Itr mro_itr;
Eina_Bool do_error:1;
Eina_Bool condtor_done:1;
Eina_Bool composite:1;
Eina_Bool del:1;
Eina_Bool manual_free:1;
};
/* Start of Dich */
/* How we search and store the implementations in classes. */
#define DICH_CHAIN_LAST_BITS 5
#define DICH_CHAIN_LAST_SIZE (1 << DICH_CHAIN_LAST_BITS)
#define DICH_CHAIN1(x) ((x) / DICH_CHAIN_LAST_SIZE)
#define DICH_CHAIN_LAST(x) ((x) % DICH_CHAIN_LAST_SIZE)
#define OP_CLASS_OFFSET_GET(x) (((x) >> EO_OP_CLASS_OFFSET) & 0xffff)
#define ID_CLASS_GET(id) ({ \
(Eo_Class *) ((id <= _eo_classes_last_id) && (id > 0)) ? \
(_eo_classes[id - 1]) : NULL; \
})
#define EO_ALIGN_SIZE(size) \
((size) + (sizeof(void *) - ((size) % sizeof(void *))))
typedef struct _Dich_Chain1 Dich_Chain1;
typedef struct
{
eo_op_func_type func;
const Eo_Class *src;
} op_type_funcs;
struct _Dich_Chain1
{
op_type_funcs *funcs;
};
typedef struct
{
const Eo_Class *klass;
size_t offset;
} Eo_Extension_Data_Offset;
struct _Eo_Class
{
EINA_MAGIC
Eo_Class_Id class_id;
const Eo_Class *parent;
const Eo_Class_Description *desc;
Dich_Chain1 *chain; /**< The size is chain size */
size_t chain_size;
size_t base_id;
const Eo_Class **extensions;
Eo_Extension_Data_Offset *extn_data_off;
size_t extn_data_size;
const Eo_Class **mro;
Eo_Kls_Itr mro_itr;
size_t data_offset; /* < Offset of the data within object data. */
Eina_Bool constructed : 1;
};
static inline void
_dich_chain_alloc(Dich_Chain1 *chain1)
{
if (!chain1->funcs)
{
chain1->funcs = calloc(DICH_CHAIN_LAST_SIZE, sizeof(*(chain1->funcs)));
}
}
static inline void
_dich_copy_all(Eo_Class *dst, const Eo_Class *src)
{
Eo_Op i;
const Dich_Chain1 *sc1 = src->chain;
Dich_Chain1 *dc1 = dst->chain;
for (i = 0 ; i < src->chain_size ; i++, sc1++, dc1++)
{
if (sc1->funcs)
{
size_t j;
_dich_chain_alloc(dc1);
const op_type_funcs *sf = sc1->funcs;
op_type_funcs *df = dc1->funcs;
for (j = 0 ; j < DICH_CHAIN_LAST_SIZE ; j++, df++, sf++)
{
if (sf->func)
{
memcpy(df, sf, sizeof(*df));
}
}
}
}
}
static inline const op_type_funcs *
_dich_func_get(const Eo_Class *klass, Eo_Op op)
{
size_t idx1 = DICH_CHAIN1(op);
if (EINA_UNLIKELY(idx1 >= klass->chain_size))
return NULL;
Dich_Chain1 *chain1 = &klass->chain[idx1];
if (EINA_UNLIKELY(!chain1->funcs))
return NULL;
return &chain1->funcs[DICH_CHAIN_LAST(op)];
}
static inline void
_dich_func_set(Eo_Class *klass, Eo_Op op, eo_op_func_type func)
{
size_t idx1 = DICH_CHAIN1(op);
Dich_Chain1 *chain1 = &klass->chain[idx1];
_dich_chain_alloc(chain1);
if (chain1->funcs[DICH_CHAIN_LAST(op)].src == klass)
{
const Eo_Class *op_kls = _eo_op_class_get(op);
const Eo_Op_Description *op_desc = _eo_op_id_desc_get(op);
ERR("Already set function for op %x (%s:%s). Overriding with func %p",
op, op_kls->desc->name, op_desc->name, func);
}
chain1->funcs[DICH_CHAIN_LAST(op)].func = func;
chain1->funcs[DICH_CHAIN_LAST(op)].src = klass;
}
static inline void
_dich_func_clean_all(Eo_Class *klass)
{
size_t i;
Dich_Chain1 *chain1 = klass->chain;
for (i = 0 ; i < klass->chain_size ; i++, chain1++)
{
if (chain1->funcs)
free(chain1->funcs);
}
free(klass->chain);
klass->chain = NULL;
}
/* END OF DICH */
static const Eo_Op_Description noop_desc =
EO_OP_DESCRIPTION(EO_NOOP, "No operation.");
static const Eo_Class *
_eo_op_class_get(Eo_Op op)
{
/* FIXME: Make it fast. */
Eo_Class **itr = _eo_classes;
int mid, max, min;
min = 0;
max = _eo_classes_last_id - 1;
while (min <= max)
{
mid = (min + max) / 2;
if (itr[mid]->base_id + itr[mid]->desc->ops.count < op)
min = mid + 1;
else if (itr[mid]->base_id > op)
max = mid - 1;
else
return itr[mid];
}
return NULL;
}
static const Eo_Op_Description *
_eo_op_id_desc_get(Eo_Op op)
{
const Eo_Class *klass;
if (op == EO_NOOP)
return &noop_desc;
klass = _eo_op_class_get(op);
if (klass)
{
Eo_Op sub_id = op - klass->base_id;
if (sub_id < klass->desc->ops.count)
return klass->desc->ops.descs + sub_id;
}
return NULL;
}
static const char *
_eo_op_id_name_get(Eo_Op op)
{
const Eo_Op_Description *desc = _eo_op_id_desc_get(op);
return (desc) ? desc->name : NULL;
}
static inline void
_eo_kls_itr_init(const Eo_Class *obj_klass, Eo_Kls_Itr *cur, Eo_Kls_Itr *prev_state)
{
memcpy(prev_state, cur, sizeof(*cur));
cur->kls = *obj_klass->mro;
}
static inline void
_eo_kls_itr_end(Eo_Kls_Itr *cur, Eo_Kls_Itr *prev_state)
{
memcpy(cur, prev_state, sizeof(*cur));
}
static inline const Eo_Class *
_eo_kls_itr_get(Eo_Kls_Itr *cur)
{
return cur->kls;
}
static inline void
_eo_kls_itr_set(Eo_Kls_Itr *cur, const Eo_Class *kls)
{
cur->kls = kls;
}
static inline const Eo_Class *
_eo_kls_itr_next(const Eo_Class *orig_kls, Eo_Kls_Itr *cur, Eo_Kls_Itr *prev_state, Eo_Op op)
{
const Eo_Class **kls_itr = NULL;
memcpy(prev_state, cur, sizeof(*cur));
/* Find the kls itr. */
kls_itr = orig_kls->mro;
while (*kls_itr && (*kls_itr != cur->kls))
kls_itr++;
if (*kls_itr)
{
kls_itr++;
while (*kls_itr)
{
const op_type_funcs *fsrc = _dich_func_get(*kls_itr, op);
if (!fsrc || !fsrc->func)
{
kls_itr++;
continue;
}
cur->kls = fsrc->src;
return cur->kls;
}
}
cur->kls = NULL;
return NULL;
}
static inline const op_type_funcs *
_eo_kls_itr_func_get(Eo_Kls_Itr *mro_itr, Eo_Op op)
{
const Eo_Class *klass = _eo_kls_itr_get(mro_itr);
if (klass)
{
const op_type_funcs *func = _dich_func_get(klass, op);
if (func && func->func)
{
_eo_kls_itr_set(mro_itr, func->src);
return func;
}
}
_eo_kls_itr_set(mro_itr, NULL);
return NULL;
}
#define _EO_OP_ERR_NO_OP_PRINT(op, klass) \
do \
{ \
const Eo_Class *op_klass = _eo_op_class_get(op); \
const char *_dom_name = (op_klass) ? op_klass->desc->name : NULL; \
ERR("Can't find func for op %x (%s:%s) for class '%s'. Aborting.", \
op, _dom_name, _eo_op_id_name_get(op), \
(klass) ? klass->desc->name : NULL); \
} \
while (0)
static Eina_Bool
_eo_op_internal(Eo *obj, Eo_Op_Type op_type, Eo_Op op, va_list *p_list)
{
#ifndef NDEBUG
const Eo_Op_Description *op_desc = _eo_op_id_desc_get(op);
if (op_desc)
{
if (op_desc->op_type == EO_OP_TYPE_CLASS)
{
ERR("Tried calling a class op '%s' (%x) from a non-class context.", (op_desc) ? op_desc->name : NULL, op);
return EINA_FALSE;
}
}
#endif
{
const op_type_funcs *func =
_eo_kls_itr_func_get(&obj->mro_itr, op);
if (EINA_LIKELY(func != NULL))
{
void *func_data =_eo_data_get(obj, func->src);
func->func(obj, func_data, p_list);
return EINA_TRUE;
}
}
/* Try composite objects */
{
Eina_List *itr;
Eo *emb_obj;
EINA_LIST_FOREACH(obj->composite_objects, itr, emb_obj)
{
/* FIXME: Clean this up a bit. */
Eo_Kls_Itr prev_state;
_eo_kls_itr_init(emb_obj->klass, &emb_obj->mro_itr, &prev_state);
if (_eo_op_internal(emb_obj, op_type, op, p_list))
{
_eo_kls_itr_end(&emb_obj->mro_itr, &prev_state);
return EINA_TRUE;
}
_eo_kls_itr_end(&emb_obj->mro_itr, &prev_state);
}
}
return EINA_FALSE;
}
static inline Eina_Bool
_eo_dov_internal(Eo *obj, Eo_Op_Type op_type, va_list *p_list)
{
Eina_Bool prev_error;
Eina_Bool ret = EINA_TRUE;
Eo_Op op = EO_NOOP;
Eo_Kls_Itr prev_state;
prev_error = obj->do_error;
_eo_ref(obj);
op = va_arg(*p_list, Eo_Op);
while (op)
{
_eo_kls_itr_init(obj->klass, &obj->mro_itr, &prev_state);
if (!_eo_op_internal(obj, op_type, op, p_list))
{
_EO_OP_ERR_NO_OP_PRINT(op, obj->klass);
ret = EINA_FALSE;
_eo_kls_itr_end(&obj->mro_itr, &prev_state);
break;
}
op = va_arg(*p_list, Eo_Op);
_eo_kls_itr_end(&obj->mro_itr, &prev_state);
}
_eo_unref(obj);
if (obj->do_error)
ret = EINA_FALSE;
obj->do_error = prev_error;
return ret;
}
EAPI Eina_Bool
eo_do_internal(Eo *obj, Eo_Op_Type op_type, ...)
{
Eina_Bool ret = EINA_TRUE;
va_list p_list;
EO_MAGIC_RETURN_VAL(obj, EO_EINA_MAGIC, EINA_FALSE);
va_start(p_list, op_type);
ret = _eo_dov_internal(obj, op_type, &p_list);
va_end(p_list);
return ret;
}
EAPI Eina_Bool
eo_do_super_internal(Eo *obj, Eo_Op_Type op_type, Eo_Op op, ...)
{
const Eo_Class *nklass;
Eina_Bool ret = EINA_TRUE;
va_list p_list;
Eo_Kls_Itr prev_state;
EO_MAGIC_RETURN_VAL(obj, EO_EINA_MAGIC, EINA_FALSE);
/* Advance the kls itr. */
nklass = _eo_kls_itr_next(obj->klass, &obj->mro_itr, &prev_state, op);
va_start(p_list, op);
if (!_eo_op_internal(obj, op_type, op, &p_list))
{
_EO_OP_ERR_NO_OP_PRINT(op, nklass);
ret = EINA_FALSE;
}
va_end(p_list);
if (obj->do_error)
ret = EINA_FALSE;
_eo_kls_itr_end(&obj->mro_itr, &prev_state);
return ret;
}
static Eina_Bool
_eo_class_op_internal(Eo_Class *klass, Eo_Op op, va_list *p_list)
{
#ifndef NDEBUG
const Eo_Op_Description *op_desc = _eo_op_id_desc_get(op);
if (op_desc)
{
if (op_desc->op_type != EO_OP_TYPE_CLASS)
{
ERR("Tried calling an instance op '%s' (%x) from a class context.", (op_desc) ? op_desc->name : NULL, op);
return EINA_FALSE;
}
}
#endif
{
const op_type_funcs *func =
_eo_kls_itr_func_get(&klass->mro_itr, op);
if (func)
{
((eo_op_func_type_class) func->func)(klass, p_list);
return EINA_TRUE;
}
}
return EINA_FALSE;
}
EAPI Eina_Bool
eo_class_do_internal(const Eo_Class *klass, ...)
{
Eina_Bool ret = EINA_TRUE;
Eo_Op op = EO_NOOP;
Eo_Kls_Itr prev_state;
va_list p_list;
EO_MAGIC_RETURN_VAL(klass, EO_CLASS_EINA_MAGIC, EINA_FALSE);
va_start(p_list, klass);
op = va_arg(p_list, Eo_Op);
while (op)
{
_eo_kls_itr_init(klass, &((Eo_Class *) klass)->mro_itr, &prev_state);
if (!_eo_class_op_internal((Eo_Class *) klass, op, &p_list))
{
_EO_OP_ERR_NO_OP_PRINT(op, klass);
ret = EINA_FALSE;
_eo_kls_itr_end(&((Eo_Class *) klass)->mro_itr, &prev_state);
break;
}
_eo_kls_itr_end(&((Eo_Class *) klass)->mro_itr, &prev_state);
op = va_arg(p_list, Eo_Op);
}
va_end(p_list);
return ret;
}
EAPI Eina_Bool
eo_class_do_super_internal(const Eo_Class *klass, Eo_Op op, ...)
{
const Eo_Class *nklass;
Eina_Bool ret = EINA_TRUE;
va_list p_list;
Eo_Kls_Itr prev_state;
EO_MAGIC_RETURN_VAL(klass, EO_CLASS_EINA_MAGIC, EINA_FALSE);
/* Advance the kls itr. */
nklass = _eo_kls_itr_next(klass, &((Eo_Class *) klass)->mro_itr, &prev_state, op);
va_start(p_list, op);
if (!_eo_class_op_internal((Eo_Class *) klass, op, &p_list))
{
_EO_OP_ERR_NO_OP_PRINT(op, nklass);
ret = EINA_FALSE;
}
va_end(p_list);
_eo_kls_itr_end(&((Eo_Class *) klass)->mro_itr, &prev_state);
return ret;
}
EAPI const Eo_Class *
eo_class_get(const Eo *obj)
{
EO_MAGIC_RETURN_VAL(obj, EO_EINA_MAGIC, EINA_FALSE);
return obj->klass;
}
EAPI const char *
eo_class_name_get(const Eo_Class *klass)
{
EO_MAGIC_RETURN_VAL(klass, EO_CLASS_EINA_MAGIC, NULL);
return klass->desc->name;
}
static void
_eo_class_base_op_init(Eo_Class *klass)
{
const Eo_Class_Description *desc = klass->desc;
klass->base_id = _eo_ops_last_id;
if (desc && desc->ops.base_op_id)
*(desc->ops.base_op_id) = klass->base_id;
_eo_ops_last_id += desc->ops.count + 1;
klass->chain_size = DICH_CHAIN1(_eo_ops_last_id) + 1;
klass->chain = calloc(klass->chain_size, sizeof(*klass->chain));
}
#ifndef NDEBUG
static Eina_Bool
_eo_class_mro_has(const Eo_Class *klass, const Eo_Class *find)
{
const Eo_Class **itr;
for (itr = klass->mro ; *itr ; itr++)
{
if (*itr == find)
{
return EINA_TRUE;
}
}
return EINA_FALSE;
}
#endif
static Eina_List *
_eo_class_mro_add(Eina_List *mro, const Eo_Class *klass)
{
Eina_List *extn_pos = NULL;
Eina_Bool check_consistency = !mro;
if (!klass)
return mro;
mro = eina_list_append(mro, klass);
/* ONLY ADD MIXINS! */
/* Recursively add extenions. */
{
const Eo_Class **extn_itr;
for (extn_itr = klass->extensions ; *extn_itr ; extn_itr++)
{
const Eo_Class *extn = *extn_itr;
if (extn->desc->type != EO_CLASS_TYPE_MIXIN)
continue;
mro = _eo_class_mro_add(mro, extn);
/* Not possible: if (!mro) return NULL; */
if (check_consistency)
{
extn_pos = eina_list_append(extn_pos, eina_list_last(mro));
}
}
}
/* Check if we can create a consistent mro. We only do it for the class
* we are working on (i.e no parents). */
if (check_consistency)
{
const Eo_Class **extn_itr;
Eina_List *itr = extn_pos;
for (extn_itr = klass->extensions ; *extn_itr ; extn_itr++)
{
const Eo_Class *extn = *extn_itr;
if (extn->desc->type != EO_CLASS_TYPE_MIXIN)
continue;
/* Get the first one after the extension. */
Eina_List *extn_list = eina_list_next(eina_list_data_get(itr));
/* If we found the extension again. */
if (eina_list_data_find_list(extn_list, extn))
{
eina_list_free(mro);
ERR("Cannot create a consistent method resolution order for class '%s' because of '%s'.", klass->desc->name, extn->desc->name);
return NULL;
}
itr = eina_list_next(itr);
}
}
eina_list_free(extn_pos);
mro = _eo_class_mro_add(mro, klass->parent);
return mro;
}
static Eina_Bool
_eo_class_mro_init(Eo_Class *klass)
{
Eina_List *mro = NULL;
DBG("Started creating MRO for class '%s'", klass->desc->name);
mro = _eo_class_mro_add(mro, klass);
if (!mro)
return EINA_FALSE;
/* Remove duplicates and make them the right order. */
{
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 Eo_Class *kls_itr;
const Eo_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);
return EINA_TRUE;
}
static void
_eo_class_constructor(Eo_Class *klass)
{
if (klass->constructed)
return;
klass->constructed = EINA_TRUE;
if (klass->desc->class_constructor)
klass->desc->class_constructor(klass);
}
EAPI void
eo_class_funcs_set(Eo_Class *klass, const Eo_Op_Func_Description *func_descs)
{
EO_MAGIC_RETURN(klass, EO_CLASS_EINA_MAGIC);
const Eo_Op_Func_Description *itr;
itr = func_descs;
if (itr)
{
for ( ; itr->op_type != EO_OP_TYPE_INVALID ; itr++)
{
const Eo_Op_Description *op_desc = _eo_op_id_desc_get(itr->op);
if (EINA_UNLIKELY(!op_desc || (itr->op == EO_NOOP)))
{
ERR("Setting implementation for non-existent op %x for class '%s'. Func index: %lu", itr->op, klass->desc->name, (unsigned long) (itr - func_descs));
}
else if (EINA_LIKELY(itr->op_type == op_desc->op_type))
{
_dich_func_set(klass, itr->op, itr->func);
}
else
{
ERR("Set function's op type (%x) is different than the one in the op description (%d) for op '%s:%s'. Func index: %lu",
itr->op_type,
(op_desc) ? op_desc->op_type : EO_OP_TYPE_REGULAR,
klass->desc->name,
(op_desc) ? op_desc->name : NULL,
(unsigned long) (itr - func_descs));
}
}
}
}
static void
eo_class_free(Eo_Class *klass)
{
if (klass->constructed)
{
if (klass->desc->class_destructor)
klass->desc->class_destructor(klass);
_dich_func_clean_all(klass);
}
free(klass->extensions);
if (klass->mro)
free(klass->mro);
if (klass->extn_data_off)
free(klass->extn_data_off);
free(klass);
}
/* DEVCHECK */
static Eina_Bool
_eo_class_check_op_descs(const Eo_Class *klass)
{
const Eo_Class_Description *desc = klass->desc;
const Eo_Op_Description *itr;
size_t i;
if (desc->ops.count > 0)
{
if (!desc->ops.base_op_id)
{
ERR("Class '%s' has a non-zero ops count, but base_id is NULL.",
desc->name);
return EINA_FALSE;
}
if (!desc->ops.descs)
{
ERR("Class '%s' has a non-zero ops count, but there are no descs.",
desc->name);
return EINA_FALSE;
}
}
itr = desc->ops.descs;
for (i = 0 ; i < desc->ops.count ; i++, itr++)
{
if (itr->sub_op != i)
{
if (itr->name)
{
ERR("Wrong order in Ops description for class '%s'. Expected %lx and got %lx", desc->name, (unsigned long) i, (unsigned long) itr->sub_op);
}
else
{
ERR("Found too few Ops description for class '%s'. Expected %lx descriptions, but found %lx.", desc->name, (unsigned long) desc->ops.count, (unsigned long) i);
}
return EINA_FALSE;
}
}
if (itr && itr->name)
{
ERR("Found extra Ops description for class '%s'. Expected %lu descriptions, but found more.", desc->name, (unsigned long) desc->ops.count);
return EINA_FALSE;
}
return EINA_TRUE;
}
/* Not really called, just used for the ptr... */
static void
_eo_class_isa_func(Eo *obj EINA_UNUSED, void *class_data EINA_UNUSED, va_list *list EINA_UNUSED)
{
/* Do nonthing. */
}
EAPI const Eo_Class *
eo_class_new(const Eo_Class_Description *desc, const Eo_Class *parent, ...)
{
Eo_Class *klass;
va_list p_list;
if (parent && !EINA_MAGIC_CHECK(parent, EO_CLASS_EINA_MAGIC))
{
EINA_MAGIC_FAIL(parent, EO_CLASS_EINA_MAGIC);
return NULL;
}
va_start(p_list, parent);
EINA_SAFETY_ON_NULL_RETURN_VAL(desc, NULL);
EINA_SAFETY_ON_NULL_RETURN_VAL(desc->name, NULL);
/* Check restrictions on Interface types. */
if (desc->type == EO_CLASS_TYPE_INTERFACE)
{
EINA_SAFETY_ON_FALSE_RETURN_VAL(!desc->data_size, NULL);
}
klass = calloc(1, sizeof(Eo_Class));
klass->parent = parent;
/* Handle class extensions */
{
Eina_List *extn_list = NULL;
const Eo_Class *extn = NULL;
const Eo_Class **extn_itr = NULL;
extn = va_arg(p_list, Eo_Class *);
while (extn)
{
switch (extn->desc->type)
{
case EO_CLASS_TYPE_REGULAR:
case EO_CLASS_TYPE_REGULAR_NO_INSTANT:
case EO_CLASS_TYPE_INTERFACE:
case EO_CLASS_TYPE_MIXIN:
extn_list = eina_list_append(extn_list, extn);
break;
}
extn = va_arg(p_list, Eo_Class *);
}
klass->extensions = calloc(sizeof(*klass->extensions),
eina_list_count(extn_list) + 1);
extn_itr = klass->extensions;
EINA_LIST_FREE(extn_list, extn)
{
*(extn_itr++) = extn;
}
}
klass->desc = desc;
/* Handle the inheritance */
if (klass->parent)
{
/* Verify the inheritance is allowed. */
switch (klass->desc->type)
{
case EO_CLASS_TYPE_REGULAR:
case EO_CLASS_TYPE_REGULAR_NO_INSTANT:
if ((klass->parent->desc->type != EO_CLASS_TYPE_REGULAR) &&
(klass->parent->desc->type != EO_CLASS_TYPE_REGULAR_NO_INSTANT))
{
ERR("Regular classes ('%s') aren't allowed to inherit from non-regular classes ('%s').", klass->desc->name, klass->parent->desc->name);
goto cleanup;
}
break;
case EO_CLASS_TYPE_INTERFACE:
case EO_CLASS_TYPE_MIXIN:
if ((klass->parent->desc->type != EO_CLASS_TYPE_INTERFACE) &&
(klass->parent->desc->type != EO_CLASS_TYPE_MIXIN))
{
ERR("Non-regular classes ('%s') aren't allowed to inherit from regular classes ('%s').", klass->desc->name, klass->parent->desc->name);
goto cleanup;
}
break;
}
/* Update the current offset. */
/* FIXME: Make sure this alignment is enough. */
klass->data_offset = klass->parent->data_offset +
EO_ALIGN_SIZE(klass->parent->desc->data_size);
}
if (!_eo_class_check_op_descs(klass))
{
goto cleanup;
}
if (!_eo_class_mro_init(klass))
{
goto cleanup;
}
/* create MIXIN offset table. */
{
const Eo_Class **mro_itr = klass->mro;
Eo_Extension_Data_Offset *extn_data_itr;
size_t extn_num = 0;
size_t extn_data_off = klass->data_offset +
EO_ALIGN_SIZE(klass->desc->data_size);
/* FIXME: Make faster... */
while (*mro_itr)
{
if (((*mro_itr)->desc->type == EO_CLASS_TYPE_MIXIN) &&
((*mro_itr)->desc->data_size > 0))
{
extn_num++;
}
mro_itr++;
}
klass->extn_data_off = calloc(extn_num + 1,
sizeof(*klass->extn_data_off));
extn_data_itr = klass->extn_data_off;
mro_itr = klass->mro;
while (*mro_itr)
{
if (((*mro_itr)->desc->type == EO_CLASS_TYPE_MIXIN) &&
((*mro_itr)->desc->data_size > 0))
{
extn_data_itr->klass = *mro_itr;
extn_data_itr->offset = extn_data_off;
extn_data_off += EO_ALIGN_SIZE(extn_data_itr->klass->desc->data_size);
extn_data_itr++;
}
mro_itr++;
}
klass->extn_data_size = extn_data_off;
}
eina_lock_take(&_eo_class_creation_lock);
klass->class_id = ++_eo_classes_last_id;
{
/* FIXME: Handle errors. */
size_t arrsize = _eo_classes_last_id * sizeof(*_eo_classes);
Eo_Class **tmp;
tmp = realloc(_eo_classes, arrsize);
/* If it's the first allocation, memset. */
if (!_eo_classes)
memset(tmp, 0, arrsize);
_eo_classes = tmp;
_eo_classes[klass->class_id - 1] = klass;
}
eina_lock_release(&_eo_class_creation_lock);
EINA_MAGIC_SET(klass, EO_CLASS_EINA_MAGIC);
_eo_class_base_op_init(klass);
/* Flatten the function array */
{
const Eo_Class **mro_itr = klass->mro;
for ( ; *mro_itr ; mro_itr++)
;
/* Skip ourselves. */
for ( mro_itr-- ; mro_itr > klass->mro ; mro_itr--)
{
_dich_copy_all(klass, *mro_itr);
}
}
/* Mark which classes we implement */
{
const Eo_Class **extn_itr;
for (extn_itr = klass->extensions ; *extn_itr ; extn_itr++)
{
const Eo_Class *extn = *extn_itr;
/* Set it in the dich. */
_dich_func_set(klass, extn->base_id +
extn->desc->ops.count, _eo_class_isa_func);
}
_dich_func_set(klass, klass->base_id + klass->desc->ops.count,
_eo_class_isa_func);
if (klass->parent)
{
_dich_func_set(klass,
klass->parent->base_id + klass->parent->desc->ops.count,
_eo_class_isa_func);
}
}
_eo_class_constructor(klass);
va_end(p_list);
return klass;
cleanup:
eo_class_free(klass);
return NULL;
}
EAPI Eina_Bool
eo_isa(const Eo *obj, const Eo_Class *klass)
{
EO_MAGIC_RETURN_VAL(obj, EO_EINA_MAGIC, EINA_FALSE);
EO_MAGIC_RETURN_VAL(klass, EO_CLASS_EINA_MAGIC, EINA_FALSE);
const op_type_funcs *func = _dich_func_get(obj->klass,
klass->base_id + klass->desc->ops.count);
/* Currently implemented by reusing the LAST op id. Just marking it with
* _eo_class_isa_func. */
return (func && (func->func == _eo_class_isa_func));
}
EAPI Eina_Bool
eo_parent_set(Eo *obj, const Eo *parent)
{
EO_MAGIC_RETURN_VAL(obj, EO_EINA_MAGIC, EINA_FALSE);
if (parent)
EO_MAGIC_RETURN_VAL(parent, EO_EINA_MAGIC, EINA_FALSE);
if (obj->parent == parent)
return EINA_TRUE;
_eo_ref(obj);
if (eo_composite_is(obj))
{
eo_composite_detach(obj, obj->parent);
}
if (obj->parent)
{
obj->parent->children =
eina_inlist_remove(obj->parent->children, EINA_INLIST_GET(obj));
eo_xunref(obj, obj->parent);
}
obj->parent = (Eo *) parent;
if (obj->parent)
{
obj->parent->children =
eina_inlist_append(obj->parent->children, EINA_INLIST_GET(obj));
eo_xref(obj, obj->parent);
}
_eo_unref(obj);
return EINA_TRUE;
}
EAPI Eo *
eo_add_internal(const Eo_Class *klass, Eo *parent, ...)
{
Eina_Bool do_err;
EO_MAGIC_RETURN_VAL(klass, EO_CLASS_EINA_MAGIC, NULL);
if (parent) EO_MAGIC_RETURN_VAL(parent, EO_EINA_MAGIC, NULL);
if (EINA_UNLIKELY(klass->desc->type != EO_CLASS_TYPE_REGULAR))
{
ERR("Class '%s' is not instantiate-able. Aborting.", klass->desc->name);
return NULL;
}
Eo *obj = calloc(1, EO_ALIGN_SIZE(sizeof(*obj)) +
(klass->data_offset + EO_ALIGN_SIZE(klass->desc->data_size)) +
klass->extn_data_size);
EINA_MAGIC_SET(obj, EO_EINA_MAGIC);
obj->refcount++;
obj->klass = klass;
eo_parent_set(obj, parent);
_eo_condtor_reset(obj);
_eo_ref(obj);
/* Run the relevant do stuff. */
{
va_list p_list;
va_start(p_list, parent);
do_err = !_eo_dov_internal(obj, EO_OP_TYPE_REGULAR, &p_list);
va_end(p_list);
}
if (EINA_UNLIKELY(do_err))
{
ERR("Object of class '%s' - One of the object constructors have failed.", klass->desc->name);
goto fail;
}
if (!obj->condtor_done)
{
ERR("Object of class '%s' - Not all of the object constructors have been executed.", klass->desc->name);
goto fail;
}
_eo_unref(obj);
return obj;
fail:
/* Unref twice, once for the ref above, and once for the basic object ref. */
_eo_unref(obj);
_eo_unref(obj);
return NULL;
}
typedef struct
{
EINA_INLIST;
const Eo *ref_obj;
const char *file;
int line;
} Eo_Xref_Node;
EAPI Eo *
eo_xref_internal(Eo *obj, const Eo *ref_obj, const char *file, int line)
{
EO_MAGIC_RETURN_VAL(obj, EO_EINA_MAGIC, obj);
_eo_ref(obj);
#ifndef NDEBUG
Eo_Xref_Node *xref = calloc(1, sizeof(*xref));
xref->ref_obj = ref_obj;
xref->file = file;
xref->line = line;
obj->xrefs = eina_inlist_prepend(obj->xrefs, EINA_INLIST_GET(xref));
#else
(void) ref_obj;
(void) file;
(void) line;
#endif
return obj;
}
EAPI void
eo_xunref(Eo *obj, const Eo *ref_obj)
{
EO_MAGIC_RETURN(obj, EO_EINA_MAGIC);
#ifndef NDEBUG
Eo_Xref_Node *xref = NULL;
EINA_INLIST_FOREACH(obj->xrefs, xref)
{
if (xref->ref_obj == ref_obj)
break;
}
if (xref)
{
obj->xrefs = eina_inlist_remove(obj->xrefs, EINA_INLIST_GET(xref));
free(xref);
}
else
{
ERR("ref_obj (%p) does not reference obj (%p). Aborting unref.", ref_obj, obj);
return;
}
#else
(void) ref_obj;
#endif
_eo_unref(obj);
}
static inline Eo *
_eo_ref(Eo *obj)
{
obj->refcount++;
return obj;
}
EAPI Eo *
eo_ref(const Eo *_obj)
{
Eo *obj = (Eo *) _obj;
EO_MAGIC_RETURN_VAL(obj, EO_EINA_MAGIC, obj);
return _eo_ref(obj);
}
static inline void
_eo_del_internal(Eo *obj)
{
Eina_Bool do_err;
/* We need that for the event callbacks that may ref/unref. */
obj->refcount++;
eo_do(obj, eo_event_callback_call(EO_EV_DEL, NULL, NULL));
const Eo_Class *klass = eo_class_get(obj);
_eo_condtor_reset(obj);
do_err = eo_do(obj, eo_destructor());
if (EINA_UNLIKELY(!do_err))
{
ERR("Object of class '%s' - One of the object destructors have failed.", klass->desc->name);
}
if (!obj->condtor_done)
{
ERR("Object of class '%s' - Not all of the object destructors have been executed.", klass->desc->name);
}
/*FIXME: add eo_class_unref(klass) ? - just to clear the caches. */
{
Eina_List *itr, *itr_n;
Eo *emb_obj;
EINA_LIST_FOREACH_SAFE(obj->composite_objects, itr, itr_n, emb_obj)
{
eo_composite_detach(emb_obj, obj);
}
}
while (obj->children)
{
eo_parent_set(EINA_INLIST_CONTAINER_GET(obj->children, Eo), NULL);
}
obj->del = EINA_TRUE;
obj->refcount--;
}
static inline void
_eo_free(Eo *obj)
{
EINA_MAGIC_SET(obj, EO_FREED_EINA_MAGIC);
free(obj);
}
static inline void
_eo_unref(Eo *obj)
{
--(obj->refcount);
if (obj->refcount == 0)
{
if (obj->del)
{
ERR("Object %p already deleted.", obj);
return;
}
_eo_del_internal(obj);
#ifndef NDEBUG
/* If for some reason it's not empty, clear it. */
while (obj->xrefs)
{
ERR("obj->xrefs is not empty, possibly a bug, please report. - An error will be reported for each xref in the stack.");
Eina_Inlist *nitr = obj->xrefs->next;
free(EINA_INLIST_CONTAINER_GET(obj->xrefs, Eo_Xref_Node));
obj->xrefs = nitr;
}
#endif
if (!obj->manual_free)
_eo_free(obj);
else
_eo_ref(obj); /* If we manual free, we keep a phantom ref. */
}
else if (obj->refcount < 0)
{
ERR("Obj:%p. Refcount (%d) < 0. Too many unrefs.", obj, obj->refcount);
return;
}
}
EAPI void
eo_unref(const Eo *_obj)
{
Eo *obj = (Eo *) _obj;
EO_MAGIC_RETURN(obj, EO_EINA_MAGIC);
_eo_unref(obj);
}
EAPI void
eo_del(const Eo *obj)
{
eo_parent_set((Eo *) obj, NULL);
eo_unref(obj);
}
EAPI int
eo_ref_get(const Eo *obj)
{
EO_MAGIC_RETURN_VAL(obj, EO_EINA_MAGIC, 0);
return obj->refcount;
}
EAPI Eo *
eo_parent_get(const Eo *obj)
{
EO_MAGIC_RETURN_VAL(obj, EO_EINA_MAGIC, NULL);
return obj->parent;
}
EAPI void
eo_error_set_internal(const Eo *obj, const char *file, int line)
{
EO_MAGIC_RETURN(obj, EO_EINA_MAGIC);
ERR("Error with obj '%p' at %s:%d", obj, file, line);
((Eo *) obj)->do_error = EINA_TRUE;
}
void
_eo_condtor_done(Eo *obj)
{
if (obj->condtor_done)
{
ERR("Object %p is already constructed at this point.", obj);
return;
}
obj->condtor_done = EINA_TRUE;
}
static void
_eo_condtor_reset(Eo *obj)
{
obj->condtor_done = EINA_FALSE;
}
static inline void *
_eo_data_get(const Eo *obj, const Eo_Class *klass)
{
if (EINA_LIKELY(klass->desc->data_size > 0))
{
if (EINA_UNLIKELY(klass->desc->type == EO_CLASS_TYPE_MIXIN))
{
Eo_Extension_Data_Offset *doff_itr =
eo_class_get(obj)->extn_data_off;
if (!doff_itr)
return NULL;
while (doff_itr->klass)
{
if (doff_itr->klass == klass)
return ((char *) obj) + EO_ALIGN_SIZE(sizeof(*obj)) +
doff_itr->offset;
doff_itr++;
}
}
else
{
return ((char *) obj) + EO_ALIGN_SIZE(sizeof(*obj)) +
klass->data_offset;
}
}
return NULL;
}
EAPI void *
eo_data_get(const Eo *obj, const Eo_Class *klass)
{
void *ret;
EO_MAGIC_RETURN_VAL(obj, EO_EINA_MAGIC, NULL);
EO_MAGIC_RETURN_VAL(klass, EO_CLASS_EINA_MAGIC, NULL);
#ifndef NDEBUG
if (!_eo_class_mro_has(obj->klass, klass))
{
ERR("Tried getting data of class '%s' from object of class '%s', but the former is not a direct inheritance of the latter.", klass->desc->name, obj->klass->desc->name);
return NULL;
}
#endif
ret = _eo_data_get(obj, klass);
#ifndef NDEBUG
if (!ret && (klass->desc->data_size == 0))
{
ERR("Tried getting data of class '%s', but it has none..", klass->desc->name);
}
#endif
return ret;
}
EAPI Eina_Bool
eo_init(void)
{
const char *log_dom = "eo";
if (_eo_init_count++ > 0)
return EINA_TRUE;
eina_init();
_eo_classes = NULL;
_eo_classes_last_id = EO_CLASS_IDS_FIRST - 1;
_eo_ops_last_id = EO_OP_IDS_FIRST;
_eo_log_dom = eina_log_domain_register(log_dom, EINA_COLOR_LIGHTBLUE);
if (_eo_log_dom < 0)
{
EINA_LOG_ERR("Could not register log domain: %s", log_dom);
return EINA_FALSE;
}
if (!eina_lock_new(&_eo_class_creation_lock))
{
EINA_LOG_ERR("Could not init lock.");
return EINA_FALSE;
}
eina_magic_string_static_set(EO_EINA_MAGIC, EO_EINA_MAGIC_STR);
eina_magic_string_static_set(EO_FREED_EINA_MAGIC,
EO_FREED_EINA_MAGIC_STR);
eina_magic_string_static_set(EO_CLASS_EINA_MAGIC,
EO_CLASS_EINA_MAGIC_STR);
#ifndef NDEBUG
/* Call it just for coverage purposes. Ugly I know, but I like it better than
* casting everywhere else. */
_eo_class_isa_func(NULL, NULL, NULL);
#endif
return EINA_TRUE;
}
EAPI Eina_Bool
eo_shutdown(void)
{
size_t i;
Eo_Class **cls_itr = _eo_classes;
if (--_eo_init_count > 0)
return EINA_TRUE;
for (i = 0 ; i < _eo_classes_last_id ; i++, cls_itr++)
{
if (*cls_itr)
eo_class_free(*cls_itr);
}
if (_eo_classes)
free(_eo_classes);
eina_lock_free(&_eo_class_creation_lock);
eina_log_domain_unregister(_eo_log_dom);
_eo_log_dom = -1;
eina_shutdown();
return EINA_TRUE;
}
EAPI void
eo_composite_attach(Eo *comp_obj, Eo *parent)
{
EO_MAGIC_RETURN(comp_obj, EO_EINA_MAGIC);
EO_MAGIC_RETURN(parent, EO_EINA_MAGIC);
comp_obj->composite = EINA_TRUE;
eo_parent_set(comp_obj, parent);
parent->composite_objects = eina_list_prepend(parent->composite_objects, comp_obj);
}
EAPI void
eo_composite_detach(Eo *comp_obj, Eo *parent)
{
EO_MAGIC_RETURN(comp_obj, EO_EINA_MAGIC);
EO_MAGIC_RETURN(parent, EO_EINA_MAGIC);
comp_obj->composite = EINA_FALSE;
parent->composite_objects = eina_list_remove(parent->composite_objects, comp_obj);
eo_parent_set(comp_obj, NULL);
}
EAPI Eina_Bool
eo_composite_is(const Eo *comp_obj)
{
EO_MAGIC_RETURN_VAL(comp_obj, EO_EINA_MAGIC, EINA_FALSE);
return comp_obj->composite;
}
EAPI Eina_Bool
eo_destructed_is(const Eo *obj)
{
EO_MAGIC_RETURN_VAL(obj, EO_EINA_MAGIC, EINA_FALSE);
return obj->del;
}
EAPI void
eo_manual_free_set(Eo *obj, Eina_Bool manual_free)
{
EO_MAGIC_RETURN(obj, EO_EINA_MAGIC);
obj->manual_free = manual_free;
}
EAPI void
eo_manual_free(Eo *obj)
{
EO_MAGIC_RETURN(obj, EO_EINA_MAGIC);
if (EINA_FALSE == obj->manual_free)
{
ERR("Tried to manually free the object %p while the option has not been set; see eo_manual_free_set for more information.", obj);
return;
}
if (!obj->del)
{
ERR("Tried deleting the object %p while still referenced(%d).", obj, eo_ref_get(obj));
return;
}
_eo_free(obj);
}
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