580 lines
16 KiB
C
580 lines
16 KiB
C
#ifdef HAVE_CONFIG_H
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# include <config.h>
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#endif
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#include <Eina.h>
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#include "Eo.h"
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#include "eo_private.h"
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EAPI Eo_Op EO_BASE_BASE_ID = 0;
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static int event_freeze_count = 0;
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typedef struct
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{
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Eina_Inlist *generic_data;
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Eo ***wrefs;
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Eina_Inlist *callbacks;
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int walking_list;
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int event_freeze_count;
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Eina_Bool deletions_waiting : 1;
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} Private_Data;
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typedef struct
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{
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EINA_INLIST;
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Eina_Stringshare *key;
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void *data;
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eo_base_data_free_func free_func;
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} Eo_Generic_Data_Node;
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static void
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_eo_generic_data_node_free(Eo_Generic_Data_Node *node)
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{
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eina_stringshare_del(node->key);
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if (node->free_func)
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node->free_func(node->data);
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free(node);
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}
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static void
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_eo_generic_data_del_all(Private_Data *pd)
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{
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Eina_Inlist *nnode;
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Eo_Generic_Data_Node *node = NULL;
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EINA_INLIST_FOREACH_SAFE(pd->generic_data, nnode, node)
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{
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pd->generic_data = eina_inlist_remove(pd->generic_data,
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EINA_INLIST_GET(node));
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_eo_generic_data_node_free(node);
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}
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}
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static void
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_data_set(Eo *obj, void *class_data, va_list *list)
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{
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Private_Data *pd = class_data;
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const char *key = va_arg(*list, const char *);
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const void *data = va_arg(*list, const void *);
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eo_base_data_free_func free_func = va_arg(*list, eo_base_data_free_func);
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Eo_Generic_Data_Node *node;
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if (!key) return;
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eo_do(obj, eo_base_data_del(key));
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node = malloc(sizeof(Eo_Generic_Data_Node));
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node->key = eina_stringshare_add(key);
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node->data = (void *) data;
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node->free_func = free_func;
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pd->generic_data = eina_inlist_prepend(pd->generic_data,
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EINA_INLIST_GET(node));
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}
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static void
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_data_get(Eo *obj EINA_UNUSED, void *class_data, va_list *list)
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{
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/* We don't really change it... */
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Private_Data *pd = (Private_Data *) class_data;
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const char *key = va_arg(*list, const char *);
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void **data = va_arg(*list, void **);
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Eo_Generic_Data_Node *node;
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if (!data) return;
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*data = NULL;
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if (!key) return;
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EINA_INLIST_FOREACH(pd->generic_data, node)
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{
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if (!strcmp(node->key, key))
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{
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pd->generic_data =
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eina_inlist_promote(pd->generic_data, EINA_INLIST_GET(node));
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*data = node->data;
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return;
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}
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}
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}
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static void
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_data_del(Eo *obj EINA_UNUSED, void *class_data, va_list *list)
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{
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Private_Data *pd = class_data;
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const char *key = va_arg(*list, const char *);
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Eo_Generic_Data_Node *node;
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if (!key) return;
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EINA_INLIST_FOREACH(pd->generic_data, node)
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{
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if (!strcmp(node->key, key))
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{
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pd->generic_data = eina_inlist_remove(pd->generic_data,
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EINA_INLIST_GET(node));
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_eo_generic_data_node_free(node);
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return;
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}
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}
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}
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/* Weak reference. */
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static inline size_t
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_wref_count(Private_Data *pd)
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{
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size_t count = 0;
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if (!pd->wrefs)
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return 0;
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Eo ***itr;
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for (itr = pd->wrefs ; *itr ; itr++)
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count++;
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return count;
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}
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static void
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_wref_add(Eo *obj, void *class_data, va_list *list)
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{
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Private_Data *pd = (Private_Data *) class_data;
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size_t count;
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Eo **wref = va_arg(*list, Eo **);
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count = _wref_count(pd);
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count += 1; /* New wref. */
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pd->wrefs= realloc(pd->wrefs, sizeof(*pd->wrefs) * (count + 1));
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pd->wrefs[count - 1] = wref;
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pd->wrefs[count] = NULL;
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*wref = obj;
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}
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static void
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_wref_del(Eo *obj, void *class_data, va_list *list)
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{
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Private_Data *pd = (Private_Data *) class_data;
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size_t count;
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Eo **wref = va_arg(*list, Eo **);
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if (*wref != obj)
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{
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ERR("Wref is a weak ref to %p, while this function was called on %p.",
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*wref, obj);
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return;
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}
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if (!pd->wrefs)
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{
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ERR("There are no weak refs for object %p", obj);
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*wref = NULL;
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return;
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}
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/* Move the last item in the array instead of the current wref. */
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count = _wref_count(pd);
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{
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Eo ***itr;
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for (itr = pd->wrefs ; *itr ; itr++)
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{
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if (*itr == wref)
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{
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*itr = pd->wrefs[count - 1];
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break;
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}
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}
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if (!*itr)
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{
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ERR("Wref %p is not associated with object %p", wref, obj);
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*wref = NULL;
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return;
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}
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}
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if (count > 1)
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{
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// No count--; because of the NULL that is not included in the count. */
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pd->wrefs = realloc(pd->wrefs, sizeof(*pd->wrefs) * count);
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pd->wrefs[count - 1] = NULL;
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}
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else
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{
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free(pd->wrefs);
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pd->wrefs = NULL;
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}
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*wref = NULL;
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}
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static inline void
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_wref_destruct(Private_Data *pd)
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{
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Eo ***itr;
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if (!pd->wrefs)
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return;
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for (itr = pd->wrefs ; *itr ; itr++)
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{
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**itr = NULL;
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}
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free(pd->wrefs);
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}
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/* EOF Weak reference. */
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/* Event callbacks */
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/* Callbacks */
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typedef struct
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{
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EINA_INLIST;
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const Eo_Event_Description *event;
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Eo_Event_Cb func;
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void *func_data;
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Eo_Callback_Priority priority;
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Eina_Bool delete_me : 1;
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} Eo_Callback_Description;
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/* Actually remove, doesn't care about walking list, or delete_me */
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static void
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_eo_callback_remove(Private_Data *pd, Eo_Callback_Description *cb)
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{
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pd->callbacks = eina_inlist_remove(pd->callbacks,
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EINA_INLIST_GET(cb));
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free(cb);
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}
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/* Actually remove, doesn't care about walking list, or delete_me */
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static void
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_eo_callback_remove_all(Private_Data *pd)
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{
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Eina_Inlist *initr;
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Eo_Callback_Description *cb = NULL;
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EINA_INLIST_FOREACH_SAFE(pd->callbacks, initr, cb)
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{
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_eo_callback_remove(pd, cb);
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}
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}
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static void
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_eo_callbacks_clear(Private_Data *pd)
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{
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Eina_Inlist *itn;
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Eo_Callback_Description *cb = NULL;
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/* Abort if we are currently walking the list. */
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if (pd->walking_list > 0)
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return;
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/* If there are no deletions waiting. */
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if (!pd->deletions_waiting)
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return;
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pd->deletions_waiting = EINA_FALSE;
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EINA_INLIST_FOREACH_SAFE(pd->callbacks, itn, cb)
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{
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if (cb->delete_me)
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{
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_eo_callback_remove(pd, cb);
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}
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}
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}
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static int
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_callback_priority_cmp(const void *_a, const void *_b)
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{
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const Eo_Callback_Description *a, *b;
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a = (const Eo_Callback_Description *) _a;
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b = (const Eo_Callback_Description *) _b;
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if (a->priority < b->priority)
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return -1;
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else
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return 1;
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}
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static void
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_ev_cb_priority_add(Eo *obj, void *class_data, va_list *list)
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{
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Private_Data *pd = (Private_Data *) class_data;
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const Eo_Event_Description *desc = va_arg(*list, const Eo_Event_Description *);
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Eo_Callback_Priority priority = va_arg(*list, int);
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Eo_Event_Cb func = va_arg(*list, Eo_Event_Cb);
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const void *data = va_arg(*list, const void *);
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Eo_Callback_Description *cb = calloc(1, sizeof(*cb));
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cb->event = desc;
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cb->func = func;
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cb->func_data = (void *) data;
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cb->priority = priority;
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pd->callbacks = eina_inlist_sorted_insert(pd->callbacks,
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EINA_INLIST_GET(cb), _callback_priority_cmp);
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eo_do(obj, eo_event_callback_call(EO_EV_CALLBACK_ADD, desc, NULL));
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}
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static void
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_ev_cb_del(Eo *obj, void *class_data, va_list *list)
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{
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Private_Data *pd = (Private_Data *) class_data;
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const Eo_Event_Description *desc = va_arg(*list, const Eo_Event_Description *);
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Eo_Event_Cb func = va_arg(*list, Eo_Event_Cb);
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void *user_data = va_arg(*list, void *);
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Eo_Callback_Description *cb;
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EINA_INLIST_FOREACH(pd->callbacks, cb)
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{
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if ((cb->event == desc) && (cb->func == func) &&
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(cb->func_data == user_data))
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{
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cb->delete_me = EINA_TRUE;
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pd->deletions_waiting = EINA_TRUE;
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_eo_callbacks_clear(pd);
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eo_do(obj, eo_event_callback_call(EO_EV_CALLBACK_DEL, desc, NULL));
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return;
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}
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}
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ERR("Callback of object %p with function %p and data %p not found.", obj, func, user_data);
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}
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static void
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_ev_cb_call(Eo *obj, void *class_data, va_list *list)
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{
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Private_Data *pd = (Private_Data *) class_data;
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const Eo_Event_Description *desc = va_arg(*list, const Eo_Event_Description *);
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void *event_info = va_arg(*list, void *);
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Eina_Bool *ret = va_arg(*list, Eina_Bool *);
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Eo_Callback_Description *cb;
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if (ret) *ret = EINA_TRUE;
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if (event_freeze_count || pd->event_freeze_count)
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return;
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/* FIXME: Change eo_ref to _eo_ref and unref. */
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eo_ref(obj);
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pd->walking_list++;
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EINA_INLIST_FOREACH(pd->callbacks, cb)
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{
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if (!cb->delete_me && (cb->event == desc))
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{
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/* Abort callback calling if the func says so. */
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if (!cb->func((void *) cb->func_data, obj, desc,
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(void *) event_info))
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{
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if (ret) *ret = EINA_FALSE;
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break;
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}
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}
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}
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pd->walking_list--;
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_eo_callbacks_clear(pd);
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eo_unref(obj);
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}
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static Eina_Bool
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_eo_event_forwarder_callback(void *data, Eo *obj, const Eo_Event_Description *desc, void *event_info)
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{
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(void) obj;
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Eo *new_obj = (Eo *) data;
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Eina_Bool ret;
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eo_do(new_obj, eo_event_callback_call(desc, event_info, &ret));
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return ret;
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}
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/* FIXME: Change default priority? Maybe call later? */
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static void
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_ev_cb_forwarder_add(Eo *obj, void *class_data EINA_UNUSED, va_list *list)
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{
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const Eo_Event_Description *desc = va_arg(*list, const Eo_Event_Description *);
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Eo *new_obj = va_arg(*list, Eo *);
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/* FIXME: Add it EO_MAGIC_RETURN(new_obj, EO_EINA_MAGIC); */
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eo_do(obj, eo_event_callback_add(desc, _eo_event_forwarder_callback, new_obj));
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}
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static void
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_ev_cb_forwarder_del(Eo *obj, void *class_data EINA_UNUSED, va_list *list)
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{
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const Eo_Event_Description *desc = va_arg(*list, const Eo_Event_Description *);
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Eo *new_obj = va_arg(*list, Eo *);
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/* FIXME: Add it EO_MAGIC_RETURN(new_obj, EO_EINA_MAGIC); */
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eo_do(obj, eo_event_callback_del(desc, _eo_event_forwarder_callback, new_obj));
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}
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static void
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_ev_freeze(Eo *obj EINA_UNUSED, void *class_data, va_list *list EINA_UNUSED)
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{
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Private_Data *pd = (Private_Data *) class_data;
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pd->event_freeze_count++;
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}
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static void
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_ev_thaw(Eo *obj, void *class_data, va_list *list EINA_UNUSED)
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{
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Private_Data *pd = (Private_Data *) class_data;
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if (pd->event_freeze_count > 0)
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{
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pd->event_freeze_count--;
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}
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else
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{
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ERR("Events for object %p have already been thawed.", obj);
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}
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}
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static void
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_ev_freeze_get(Eo *obj EINA_UNUSED, void *class_data, va_list *list)
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{
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Private_Data *pd = (Private_Data *) class_data;
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int *ret = va_arg(*list, int *);
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*ret = pd->event_freeze_count;
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}
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static void
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_ev_global_freeze(const Eo_Class *klass EINA_UNUSED, va_list *list EINA_UNUSED)
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{
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event_freeze_count++;
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}
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static void
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_ev_global_thaw(const Eo_Class *klass EINA_UNUSED, va_list *list EINA_UNUSED)
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{
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if (event_freeze_count > 0)
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{
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event_freeze_count--;
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}
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else
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{
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ERR("Global events have already been thawed.");
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}
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}
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static void
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_ev_global_freeze_get(const Eo_Class *klass EINA_UNUSED, va_list *list)
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{
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int *ret = va_arg(*list, int *);
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*ret = event_freeze_count;
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}
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/* EOF event callbacks */
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/* EO_BASE_CLASS stuff */
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#define MY_CLASS EO_BASE_CLASS
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/* FIXME: Set proper type descriptions. */
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EAPI const Eo_Event_Description _EO_EV_CALLBACK_ADD =
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EO_EVENT_DESCRIPTION("callback,add", "A callback was added.");
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EAPI const Eo_Event_Description _EO_EV_CALLBACK_DEL =
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EO_EVENT_DESCRIPTION("callback,del", "A callback was deleted.");
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EAPI const Eo_Event_Description _EO_EV_DEL =
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EO_EVENT_DESCRIPTION("del", "Obj is being deleted.");
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static void
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_constructor(Eo *obj, void *class_data EINA_UNUSED, va_list *list EINA_UNUSED)
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{
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DBG("%p - %s.", obj, eo_class_name_get(MY_CLASS));
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_eo_condtor_done(obj);
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}
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static void
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_destructor(Eo *obj, void *class_data, va_list *list EINA_UNUSED)
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{
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DBG("%p - %s.", obj, eo_class_name_get(MY_CLASS));
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_eo_generic_data_del_all(class_data);
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_wref_destruct(class_data);
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_eo_callback_remove_all(class_data);
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_eo_condtor_done(obj);
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}
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static void
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_class_constructor(Eo_Class *klass)
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{
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event_freeze_count = 0;
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const Eo_Op_Func_Description func_desc[] = {
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EO_OP_FUNC(EO_BASE_ID(EO_BASE_SUB_ID_CONSTRUCTOR), _constructor),
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EO_OP_FUNC(EO_BASE_ID(EO_BASE_SUB_ID_DESTRUCTOR), _destructor),
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EO_OP_FUNC(EO_BASE_ID(EO_BASE_SUB_ID_DATA_SET), _data_set),
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EO_OP_FUNC(EO_BASE_ID(EO_BASE_SUB_ID_DATA_GET), _data_get),
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EO_OP_FUNC(EO_BASE_ID(EO_BASE_SUB_ID_DATA_DEL), _data_del),
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EO_OP_FUNC(EO_BASE_ID(EO_BASE_SUB_ID_WREF_ADD), _wref_add),
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EO_OP_FUNC(EO_BASE_ID(EO_BASE_SUB_ID_WREF_DEL), _wref_del),
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EO_OP_FUNC(EO_BASE_ID(EO_BASE_SUB_ID_EVENT_CALLBACK_PRIORITY_ADD), _ev_cb_priority_add),
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EO_OP_FUNC(EO_BASE_ID(EO_BASE_SUB_ID_EVENT_CALLBACK_DEL), _ev_cb_del),
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EO_OP_FUNC(EO_BASE_ID(EO_BASE_SUB_ID_EVENT_CALLBACK_CALL), _ev_cb_call),
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EO_OP_FUNC(EO_BASE_ID(EO_BASE_SUB_ID_EVENT_CALLBACK_FORWARDER_ADD), _ev_cb_forwarder_add),
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EO_OP_FUNC(EO_BASE_ID(EO_BASE_SUB_ID_EVENT_CALLBACK_FORWARDER_DEL), _ev_cb_forwarder_del),
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EO_OP_FUNC(EO_BASE_ID(EO_BASE_SUB_ID_EVENT_FREEZE), _ev_freeze),
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EO_OP_FUNC(EO_BASE_ID(EO_BASE_SUB_ID_EVENT_THAW), _ev_thaw),
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EO_OP_FUNC(EO_BASE_ID(EO_BASE_SUB_ID_EVENT_FREEZE_GET), _ev_freeze_get),
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EO_OP_FUNC_CLASS(EO_BASE_ID(EO_BASE_SUB_ID_EVENT_GLOBAL_FREEZE), _ev_global_freeze),
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EO_OP_FUNC_CLASS(EO_BASE_ID(EO_BASE_SUB_ID_EVENT_GLOBAL_THAW), _ev_global_thaw),
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EO_OP_FUNC_CLASS(EO_BASE_ID(EO_BASE_SUB_ID_EVENT_GLOBAL_FREEZE_GET), _ev_global_freeze_get),
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EO_OP_FUNC_SENTINEL
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};
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eo_class_funcs_set(klass, func_desc);
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}
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static const Eo_Op_Description op_desc[] = {
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EO_OP_DESCRIPTION(EO_BASE_SUB_ID_CONSTRUCTOR, "Constructor"),
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EO_OP_DESCRIPTION(EO_BASE_SUB_ID_DESTRUCTOR, "Destructor"),
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EO_OP_DESCRIPTION(EO_BASE_SUB_ID_DATA_SET, "Set data for key."),
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EO_OP_DESCRIPTION(EO_BASE_SUB_ID_DATA_GET, "Get data for key."),
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EO_OP_DESCRIPTION(EO_BASE_SUB_ID_DATA_DEL, "Del key."),
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EO_OP_DESCRIPTION(EO_BASE_SUB_ID_WREF_ADD, "Add a weak ref to the object."),
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EO_OP_DESCRIPTION(EO_BASE_SUB_ID_WREF_DEL, "Delete the weak ref."),
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EO_OP_DESCRIPTION(EO_BASE_SUB_ID_EVENT_CALLBACK_PRIORITY_ADD, "Add an event callback with a priority."),
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EO_OP_DESCRIPTION(EO_BASE_SUB_ID_EVENT_CALLBACK_DEL, "Delete an event callback"),
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EO_OP_DESCRIPTION(EO_BASE_SUB_ID_EVENT_CALLBACK_CALL, "Call the event callbacks for an event."),
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EO_OP_DESCRIPTION(EO_BASE_SUB_ID_EVENT_CALLBACK_FORWARDER_ADD, "Add an event forwarder."),
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EO_OP_DESCRIPTION(EO_BASE_SUB_ID_EVENT_CALLBACK_FORWARDER_DEL, "Delete an event forwarder."),
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EO_OP_DESCRIPTION(EO_BASE_SUB_ID_EVENT_FREEZE, "Freezes events."),
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EO_OP_DESCRIPTION(EO_BASE_SUB_ID_EVENT_THAW, "Thaws events."),
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EO_OP_DESCRIPTION(EO_BASE_SUB_ID_EVENT_FREEZE_GET, "Get event freeze counter."),
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EO_OP_DESCRIPTION_CLASS(EO_BASE_SUB_ID_EVENT_GLOBAL_FREEZE, "Freezes events globally."),
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EO_OP_DESCRIPTION_CLASS(EO_BASE_SUB_ID_EVENT_GLOBAL_THAW, "Thaws events globally."),
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EO_OP_DESCRIPTION_CLASS(EO_BASE_SUB_ID_EVENT_GLOBAL_FREEZE_GET, "Get global event freeze counter."),
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EO_OP_DESCRIPTION_SENTINEL
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};
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static const Eo_Event_Description *event_desc[] = {
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EO_EV_CALLBACK_ADD,
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EO_EV_CALLBACK_DEL,
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EO_EV_DEL,
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NULL
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};
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static const Eo_Class_Description class_desc = {
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EO_VERSION,
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"Eo Base",
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EO_CLASS_TYPE_REGULAR_NO_INSTANT,
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EO_CLASS_DESCRIPTION_OPS(&EO_BASE_BASE_ID, op_desc, EO_BASE_SUB_ID_LAST),
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event_desc,
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sizeof(Private_Data),
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_class_constructor,
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NULL
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};
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EO_DEFINE_CLASS(eo_base_class_get, &class_desc, NULL, NULL)
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