diff options
Diffstat (limited to 'camel/camel-object.c')
| -rw-r--r-- | camel/camel-object.c | 986 |
1 files changed, 0 insertions, 986 deletions
diff --git a/camel/camel-object.c b/camel/camel-object.c deleted file mode 100644 index 7f53a68bfe..0000000000 --- a/camel/camel-object.c +++ /dev/null @@ -1,986 +0,0 @@ -/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */ -/* camel-object.c: Base class for Camel */ - -/* - * Author: - * Dan Winship <danw@helixcode.com> - * - * Copyright 2000 Helix Code, Inc. (http://www.helixcode.com) - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License as - * published by the Free Software Foundation; either version 2 of the - * License, or (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 - * USA - */ - -#ifdef HAVE_CONFIG_H -#include <config.h> -#endif - -#include <string.h> -#include "camel-object.h" - -/* I just mashed the keyboard for these... */ -#define CAMEL_OBJECT_MAGIC_VALUE 0x77A344EF -#define CAMEL_OBJECT_CLASS_MAGIC_VALUE 0xEE26A990 -#define CAMEL_OBJECT_FINALIZED_VALUE 0x84AC3656 -#define CAMEL_OBJECT_CLASS_FINALIZED_VALUE 0x7621ABCD - -#define DEFAULT_PREALLOCS 8 - -#define BAST_CASTARD 1 /* Define to return NULL when casts fail */ - -#define NULL_PREP_VALUE ((gpointer)make_global_classfuncs) /* See camel_object_class_declare_event */ - -/* ** Quickie type system ************************************************* */ - -typedef struct _CamelTypeInfo -{ - CamelType self; - CamelType parent; - const gchar *name; - - size_t instance_size; - GMemChunk *instance_chunk; - CamelObjectInitFunc instance_init; - CamelObjectFinalizeFunc instance_finalize; - GList *free_instances; - - size_t classfuncs_size; - CamelObjectClassInitFunc class_init; - CamelObjectClassFinalizeFunc class_finalize; - CamelObjectClass *global_classfuncs; -} -CamelTypeInfo; - -typedef struct _CamelHookPair -{ - CamelObjectEventHookFunc func; - gpointer user_data; -} -CamelHookPair; - -/* ************************************************************************ */ - -static void camel_type_lock_up (void); -static void camel_type_lock_down (void); - -static void obj_init (CamelObject * obj); -static void obj_finalize (CamelObject * obj); -static void obj_class_init (CamelObjectClass * class); -static void obj_class_finalize (CamelObjectClass * class); - -static gboolean shared_is_of_type (CamelObjectShared * sh, CamelType ctype, - gboolean is_obj); -static void make_global_classfuncs (CamelTypeInfo * type_info); - -/* ************************************************************************ */ - -G_LOCK_DEFINE_STATIC (type_system); -G_LOCK_DEFINE_STATIC (type_system_level); -static GPrivate *type_system_locklevel = NULL; - -G_LOCK_DEFINE_STATIC (refcount); - -static gboolean type_system_initialized = FALSE; -static GHashTable *ctype_to_typeinfo = NULL; -static const CamelType camel_object_type = 1; -static CamelType cur_max_type = CAMEL_INVALID_TYPE; - -/* ************************************************************************ */ - -#define LOCK_VAL (GPOINTER_TO_INT (g_private_get (type_system_locklevel))) -#define LOCK_SET( val ) g_private_set (type_system_locklevel, GINT_TO_POINTER (val)) - -static void -camel_type_lock_up (void) -{ - G_LOCK (type_system_level); - - if (type_system_locklevel == NULL) - type_system_locklevel = g_private_new (GINT_TO_POINTER (0)); - - if (LOCK_VAL == 0) { - G_UNLOCK (type_system_level); - G_LOCK (type_system); - G_LOCK (type_system_level); - } - - LOCK_SET (LOCK_VAL + 1); - - G_UNLOCK (type_system_level); -} - -static void -camel_type_lock_down (void) -{ - G_LOCK (type_system_level); - - if (type_system_locklevel == NULL) { - g_warning - ("camel_type_lock_down: lock down before a lock up?"); - type_system_locklevel = g_private_new (GINT_TO_POINTER (0)); - G_UNLOCK (type_system_level); - return; - } - - LOCK_SET (LOCK_VAL - 1); - - if (LOCK_VAL == 0) - G_UNLOCK (type_system); - - G_UNLOCK (type_system_level); -} - -void -camel_type_init (void) -{ - CamelTypeInfo *obj_info; - - camel_type_lock_up (); - - if (type_system_initialized) { - g_warning - ("camel_type_init: type system already initialized."); - camel_type_lock_down (); - return; - } - - type_system_initialized = TRUE; - ctype_to_typeinfo = g_hash_table_new (g_direct_hash, g_direct_equal); - - obj_info = g_new (CamelTypeInfo, 1); - obj_info->self = camel_object_type; - obj_info->parent = CAMEL_INVALID_TYPE; - obj_info->name = "CamelObject"; - - obj_info->instance_size = sizeof (CamelObject); - obj_info->instance_chunk = - g_mem_chunk_create (CamelObject, DEFAULT_PREALLOCS, - G_ALLOC_ONLY); - obj_info->instance_init = obj_init; - obj_info->instance_finalize = obj_finalize; - obj_info->free_instances = NULL; - - obj_info->classfuncs_size = sizeof (CamelObjectClass); - obj_info->class_init = obj_class_init; - obj_info->class_finalize = obj_class_finalize; - - g_hash_table_insert (ctype_to_typeinfo, - GINT_TO_POINTER (CAMEL_INVALID_TYPE), NULL); - g_hash_table_insert (ctype_to_typeinfo, - GINT_TO_POINTER (camel_object_type), obj_info); - - /* Sigh. Ugly */ - make_global_classfuncs (obj_info); - - cur_max_type = camel_object_type; - - camel_type_lock_down (); -} - -CamelType -camel_type_register (CamelType parent, const gchar * name, - size_t instance_size, size_t classfuncs_size, - CamelObjectClassInitFunc class_init, - CamelObjectClassFinalizeFunc class_finalize, - CamelObjectInitFunc instance_init, - CamelObjectFinalizeFunc instance_finalize) -{ - CamelTypeInfo *parent_info; - CamelTypeInfo *obj_info; - gchar *chunkname; - - g_return_val_if_fail (parent != CAMEL_INVALID_TYPE, - CAMEL_INVALID_TYPE); - g_return_val_if_fail (name, CAMEL_INVALID_TYPE); - g_return_val_if_fail (instance_size, CAMEL_INVALID_TYPE); - g_return_val_if_fail (classfuncs_size, CAMEL_INVALID_TYPE); - - camel_type_lock_up (); - - if (type_system_initialized == FALSE) { - G_UNLOCK (type_system); - camel_type_init (); - G_LOCK (type_system); - } - - parent_info = - g_hash_table_lookup (ctype_to_typeinfo, - GINT_TO_POINTER (parent)); - - if (parent_info == NULL) { - g_warning - ("camel_type_register: no such parent type %d of class `%s'", - parent, name); - camel_type_lock_down (); - return CAMEL_INVALID_TYPE; - } - - if (parent_info->instance_size > instance_size) { - g_warning - ("camel_type_register: instance of class `%s' would be smaller than parent `%s'", - name, parent_info->name); - camel_type_lock_down (); - return CAMEL_INVALID_TYPE; - } - - if (parent_info->classfuncs_size > classfuncs_size) { - g_warning - ("camel_type_register: classfuncs of class `%s' would be smaller than parent `%s'", - name, parent_info->name); - camel_type_lock_down (); - return CAMEL_INVALID_TYPE; - } - - cur_max_type++; - - obj_info = g_new (CamelTypeInfo, 1); - obj_info->self = cur_max_type; - obj_info->parent = parent; - obj_info->name = name; - - obj_info->instance_size = instance_size; - chunkname = - g_strdup_printf ("chunk for instances of Camel type `%s'", - name); - obj_info->instance_chunk = - g_mem_chunk_new (chunkname, instance_size, - instance_size * DEFAULT_PREALLOCS, - G_ALLOC_ONLY); - g_free (chunkname); - obj_info->instance_init = instance_init; - obj_info->instance_finalize = instance_finalize; - obj_info->free_instances = NULL; - - obj_info->classfuncs_size = classfuncs_size; - obj_info->class_init = class_init; - obj_info->class_finalize = class_finalize; - - g_hash_table_insert (ctype_to_typeinfo, - GINT_TO_POINTER (obj_info->self), obj_info); - - /* Sigh. Ugly. */ - make_global_classfuncs (obj_info); - - camel_type_lock_down (); - return obj_info->self; -} - -CamelObjectClass * -camel_type_get_global_classfuncs (CamelType type) -{ - CamelTypeInfo *type_info; - - g_return_val_if_fail (type != CAMEL_INVALID_TYPE, NULL); - - camel_type_lock_up (); - type_info = - g_hash_table_lookup (ctype_to_typeinfo, - GINT_TO_POINTER (type)); - camel_type_lock_down (); - - g_return_val_if_fail (type_info != NULL, NULL); - - return type_info->global_classfuncs; -} - -const gchar * -camel_type_to_name (CamelType type) -{ - CamelTypeInfo *type_info; - - g_return_val_if_fail (type != CAMEL_INVALID_TYPE, - "(the invalid type)"); - - camel_type_lock_up (); - type_info = - g_hash_table_lookup (ctype_to_typeinfo, - GINT_TO_POINTER (type)); - camel_type_lock_down (); - - g_return_val_if_fail (type_info != NULL, - "(a bad type parameter was specified)"); - - return type_info->name; -} - -/* ** The CamelObject ***************************************************** */ - -static void -obj_init (CamelObject * obj) -{ - obj->s.magic = CAMEL_OBJECT_MAGIC_VALUE; - obj->ref_count = 1; - obj->event_to_hooklist = NULL; - obj->in_event = 0; -} - -static void -obj_finalize (CamelObject * obj) -{ - g_return_if_fail (obj->s.magic == CAMEL_OBJECT_MAGIC_VALUE); - g_return_if_fail (obj->ref_count == 0); - g_return_if_fail (obj->in_event == 0); - - obj->s.magic = CAMEL_OBJECT_FINALIZED_VALUE; - - if (obj->event_to_hooklist) { -#if 0 - g_hash_table_foreach (obj->event_to_hooklist, (GHFunc) g_free, - NULL); -#endif - g_hash_table_destroy (obj->event_to_hooklist); - obj->event_to_hooklist = NULL; - } -} - -static void -obj_class_init (CamelObjectClass * class) -{ - class->s.magic = CAMEL_OBJECT_CLASS_MAGIC_VALUE; - - camel_object_class_declare_event (class, "finalize", NULL); -} - -static void -obj_class_finalize (CamelObjectClass * class) -{ - g_return_if_fail (class->s.magic == CAMEL_OBJECT_CLASS_MAGIC_VALUE); - - class->s.magic = CAMEL_OBJECT_CLASS_FINALIZED_VALUE; - - if (class->event_to_preplist) { - g_hash_table_foreach (class->event_to_preplist, - (GHFunc) g_free, NULL); - g_hash_table_destroy (class->event_to_preplist); - class->event_to_preplist = NULL; - } -} - -CamelType -camel_object_get_type (void) -{ - if (type_system_initialized == FALSE) - camel_type_init (); - - return camel_object_type; -} - -CamelObject * -camel_object_new (CamelType type) -{ - CamelTypeInfo *type_info; - GSList *parents = NULL; - GSList *head = NULL; - CamelObject *instance; - - g_return_val_if_fail (type != CAMEL_INVALID_TYPE, NULL); - - /* Look up the type */ - - camel_type_lock_up (); - - type_info = - g_hash_table_lookup (ctype_to_typeinfo, - GINT_TO_POINTER (type)); - - if (type_info == NULL) { - g_warning - ("camel_object_new: trying to create object of invalid type %d", - type); - camel_type_lock_down (); - return NULL; - } - - /* Grab an instance out of the freed ones if possible, alloc otherwise */ - - if (type_info->free_instances) { - GList *first; - - first = g_list_first (type_info->free_instances); - instance = first->data; - type_info->free_instances = - g_list_remove_link (type_info->free_instances, first); - g_list_free_1 (first); - } else { - instance = g_mem_chunk_alloc0 (type_info->instance_chunk); - } - - /* Init the instance and classfuncs a bit */ - - instance->s.type = type; - instance->classfuncs = type_info->global_classfuncs; - - /* Loop through the parents in simplest -> most complex order, initing the class and instance. - - * When parent = CAMEL_INVALID_TYPE and we're at the end of the line, _lookup returns NULL - * because we inserted it as corresponding to CAMEL_INVALID_TYPE. Clever, eh? - */ - - while (type_info) { - parents = g_slist_prepend (parents, type_info); - type_info = - g_hash_table_lookup (ctype_to_typeinfo, - GINT_TO_POINTER (type_info-> - parent)); - } - - head = parents; - - for (; parents && parents->data; parents = parents->next) { - CamelTypeInfo *thisinfo; - - thisinfo = parents->data; - if (thisinfo->instance_init) - (thisinfo->instance_init) (instance); - } - - g_slist_free (head); - - camel_type_lock_down (); - return instance; -} - -void -camel_object_ref (CamelObject * obj) -{ - g_return_if_fail (CAMEL_IS_OBJECT (obj)); - - G_LOCK (refcount); - obj->ref_count++; - G_UNLOCK (refcount); -} - -void -camel_object_unref (CamelObject * obj) -{ - CamelTypeInfo *type_info; - CamelTypeInfo *iter; - GSList *parents = NULL; - GSList *head = NULL; - - g_return_if_fail (CAMEL_IS_OBJECT (obj)); - - G_LOCK (refcount); - obj->ref_count--; - - if (obj->ref_count > 0) { - G_UNLOCK (refcount); - return; - } - - G_UNLOCK (refcount); - - /* Oh no! We want to emit a "finalized" event, but that function refs the object - * because it's not supposed to get finalized in an event, but it is being finalized - * right now, and AAUGH AAUGH AUGH AUGH! - * - * So we don't call camel_object_trigger_event. We do it ourselves. We even know - * that CamelObject doesn't provide a prep for the finalized event, so we plunge - * right in and call our hooks. - * - * And there was much rejoicing. - */ - -#define hooklist parents /*cough */ - - if (obj->event_to_hooklist) { - CamelHookPair *pair; - - hooklist = - g_hash_table_lookup (obj->event_to_hooklist, - "finalize"); - - while (hooklist && hooklist->data) { - pair = hooklist->data; - (pair->func) (obj, NULL, pair->user_data); - hooklist = hooklist->next; - } - } - - hooklist = NULL; /* Don't mess with this line */ - -#undef hooklist - - /* Destroy it! hahaha! */ - - camel_type_lock_up (); - - type_info = - g_hash_table_lookup (ctype_to_typeinfo, - GINT_TO_POINTER (obj->s.type)); - - if (type_info == NULL) { - g_warning - ("camel_object_unref: seemingly valid object has a bad type %d", - obj->s.type); - camel_type_lock_down (); - return; - } - - /* Loop through the parents in most complex -> simplest order, finalizing the class - * and instance. - * - * When parent = CAMEL_INVALID_TYPE and we're at the end of the line, _lookup returns NULL - * because we inserted it as corresponding to CAMEL_INVALID_TYPE. Clever, eh? - * - * Use iter to preserve type_info for free_{instance,classfunc}s - */ - - iter = type_info; - - while (iter) { - parents = g_slist_prepend (parents, iter); - iter = - g_hash_table_lookup (ctype_to_typeinfo, - GINT_TO_POINTER (iter->parent)); - } - - parents = g_slist_reverse (parents); - head = parents; - - for (; parents && parents->data; parents = parents->next) { - CamelTypeInfo *thisinfo; - - thisinfo = parents->data; - if (thisinfo->instance_finalize) - (thisinfo->instance_finalize) (obj); - } - - g_slist_free (head); - - /* A little bit of cleaning up. - - * Don't erase the type, so we can peek at it if a finalized object - * is check_cast'ed somewhere. - */ - - memset (obj, 0, type_info->instance_size); - obj->s.type = type_info->self; - obj->s.magic = CAMEL_OBJECT_FINALIZED_VALUE; - - /* Tuck away the pointer for use in a new object */ - - type_info->free_instances = - g_list_prepend (type_info->free_instances, obj); - - camel_type_lock_down (); -} - -gboolean -camel_object_is_of_type (CamelObject * obj, CamelType ctype) -{ - return shared_is_of_type ((CamelObjectShared *) obj, ctype, TRUE); -} - -gboolean -camel_object_class_is_of_type (CamelObjectClass * class, CamelType ctype) -{ - return shared_is_of_type ((CamelObjectShared *) class, ctype, FALSE); -} - -#ifdef BAST_CASTARD -#define ERRVAL NULL -#else -#define ERRVAL obj -#endif - -CamelObject * -camel_object_check_cast (CamelObject * obj, CamelType ctype) -{ - if (shared_is_of_type ((CamelObjectShared *) obj, ctype, TRUE)) - return obj; - return ERRVAL; -} - -CamelObjectClass * -camel_object_class_check_cast (CamelObjectClass * class, CamelType ctype) -{ - if (shared_is_of_type ((CamelObjectShared *) class, ctype, FALSE)) - return class; - return ERRVAL; -} - -#undef ERRVAL - -gchar * -camel_object_describe (CamelObject * obj) -{ - if (obj == NULL) - return g_strdup ("a NULL pointer"); - - if (obj->s.magic == CAMEL_OBJECT_MAGIC_VALUE) { - return g_strdup_printf ("an instance of `%s' at %p", - camel_type_to_name (obj->s.type), - obj); - } else if (obj->s.magic == CAMEL_OBJECT_FINALIZED_VALUE) { - return g_strdup_printf ("a finalized instance of `%s' at %p", - camel_type_to_name (obj->s.type), - obj); - } else if (obj->s.magic == CAMEL_OBJECT_CLASS_MAGIC_VALUE) { - return g_strdup_printf ("the classfuncs of `%s' at %p", - camel_type_to_name (obj->s.type), - obj); - } else if (obj->s.magic == CAMEL_OBJECT_CLASS_FINALIZED_VALUE) { - return - g_strdup_printf - ("the finalized classfuncs of `%s' at %p", - camel_type_to_name (obj->s.type), obj); - } - - return g_strdup ("not a CamelObject"); -} - -/* This is likely to be called in the class_init callback, - * and the type will likely be somewhat uninitialized. - * Is this a problem? We'll see.... - */ -void -camel_object_class_declare_event (CamelObjectClass * class, - const gchar * name, - CamelObjectEventPrepFunc prep) -{ - g_return_if_fail (CAMEL_IS_OBJECT_CLASS (class)); - g_return_if_fail (name); - - if (class->event_to_preplist == NULL) - class->event_to_preplist = - g_hash_table_new (g_str_hash, g_str_equal); - else if (g_hash_table_lookup (class->event_to_preplist, name) != NULL) { - g_warning - ("camel_object_class_declare_event: event `%s' already declared for `%s'", - name, camel_type_to_name (class->s.type)); - return; - } - - /* AIEEEEEEEEEEEEEEEEEEEEEE - - * I feel so naughty. Since it's valid to declare an event and not - * provide a hook, it should be valid to insert a NULL value into - * the table. However, then our lookup in trigger_event would be - * ambiguous, not telling us whether the event is undefined or whether - * it merely has no hook. - * - * So we create an 'NULL prep' value that != NULL... specifically, it - * equals the address of one of our static functions , because that - * can't possibly be your hook. - * - * Just don't forget to check for the 'evil value' and it'll work, - * I promise. - */ - - if (prep == NULL) - prep = NULL_PREP_VALUE; - - g_hash_table_insert (class->event_to_preplist, g_strdup (name), prep); -} - -void -camel_object_hook_event (CamelObject * obj, const gchar * name, - CamelObjectEventHookFunc hook, gpointer user_data) -{ - GSList *hooklist; - CamelHookPair *pair; - gpointer old_name, old_hooklist; - - g_return_if_fail (CAMEL_IS_OBJECT (obj)); - g_return_if_fail (name); - g_return_if_fail (hook); - - if (obj->event_to_hooklist == NULL) - obj->event_to_hooklist = - g_hash_table_new (g_str_hash, g_str_equal); - - pair = g_new (CamelHookPair, 1); - pair->func = hook; - pair->user_data = user_data; - - if (g_hash_table_lookup_extended (obj->event_to_hooklist, name, - &old_name, &old_hooklist)) { - hooklist = g_slist_prepend (old_hooklist, pair); - g_hash_table_insert (obj->event_to_hooklist, old_name, - hooklist); - } else { - hooklist = g_slist_prepend (NULL, pair); - g_hash_table_insert (obj->event_to_hooklist, g_strdup (name), - hooklist); - } -} - -void -camel_object_unhook_event (CamelObject * obj, const gchar * name, - CamelObjectEventHookFunc hook, gpointer user_data) -{ - GSList *hooklist; - GSList *head; - - g_return_if_fail (CAMEL_IS_OBJECT (obj)); - g_return_if_fail (name); - g_return_if_fail (hook); - - if (obj->event_to_hooklist == NULL) { - g_warning - ("camel_object_unhook_event: trying to unhook `%s' from an instance " - "of `%s' with no hooks attached", name, - camel_type_to_name (obj->s.type)); - return; - } - - hooklist = g_hash_table_lookup (obj->event_to_hooklist, name); - - if (hooklist == NULL) { - g_warning - ("camel_object_unhook_event: trying to unhook `%s' from an instance " - "of `%s' with no hooks attached to that event.", - name, camel_type_to_name (obj->s.type)); - return; - } - - head = hooklist; - - while (hooklist) { - CamelHookPair *pair = (CamelHookPair *) hooklist->data; - - if (pair->func == hook && pair->user_data == user_data) { - g_free (hooklist->data); - head = g_slist_remove_link (head, hooklist); - g_slist_free_1 (hooklist); - g_hash_table_insert (obj->event_to_hooklist, (char *) name, - head); - return; - } - - hooklist = hooklist->next; - } - - g_warning - ("camel_object_unhook_event: cannot find hook/data pair %p/%p in an " - "instance of `%s' attached to `%s'", hook, user_data, - camel_type_to_name (obj->s.type), name); -} - -void -camel_object_trigger_event (CamelObject * obj, const gchar * name, - gpointer event_data) -{ - GSList *hooklist; - CamelHookPair *pair; - CamelObjectEventPrepFunc prep; - - g_return_if_fail (CAMEL_IS_OBJECT (obj)); - g_return_if_fail (name); - - if (obj->in_event) { - g_warning - ("camel_object_trigger_event: trying to trigger `%s' in class " - "`%s' while already triggering another event", name, - camel_type_to_name (obj->s.type)); - return; - } - - if (obj->classfuncs->event_to_preplist == NULL) { - g_warning - ("camel_object_trigger_event: trying to trigger `%s' in class " - "`%s' with no defined events.", name, - camel_type_to_name (obj->s.type)); - return; - } - - prep = g_hash_table_lookup (obj->classfuncs->event_to_preplist, name); - - if (prep == NULL) { - g_warning - ("camel_object_trigger_event: trying to trigger undefined " - "event `%s' in class `%s'.", name, - camel_type_to_name (obj->s.type)); - return; - } - - /* Ref so that it can't get destroyed in the event, which would - * be Bad. And it's a valid ref anyway... - */ - - camel_object_ref (obj); - obj->in_event = 1; - - if ((prep != NULL_PREP_VALUE && !prep (obj, event_data)) - || obj->event_to_hooklist == NULL) { - obj->in_event = 0; - camel_object_unref (obj); - return; - } - - hooklist = g_hash_table_lookup (obj->event_to_hooklist, name); - - while (hooklist && hooklist->data) { - pair = hooklist->data; - (pair->func) (obj, event_data, pair->user_data); - hooklist = hooklist->next; - } - - obj->in_event = 0; - camel_object_unref (obj); -} - -/* ** Static helpers ****************************************************** */ - -static gboolean -shared_is_of_type (CamelObjectShared * sh, CamelType ctype, gboolean is_obj) -{ - CamelTypeInfo *type_info; - gchar *targtype; - - if (is_obj) - targtype = "instance"; - else - targtype = "classdata"; - - if (ctype == CAMEL_INVALID_TYPE) { - g_warning - ("shared_is_of_type: trying to cast to CAMEL_INVALID_TYPE"); - return FALSE; - } - - if (sh == NULL) { - g_warning - ("shared_is_of_type: trying to cast NULL to %s of `%s'", - targtype, camel_type_to_name (ctype)); - return FALSE; - } - - if (sh->magic == CAMEL_OBJECT_FINALIZED_VALUE) { - g_warning - ("shared_is_of_type: trying to cast finalized instance " - "of `%s' into %s of `%s'", - camel_type_to_name (sh->type), targtype, - camel_type_to_name (ctype)); - return FALSE; - } - - if (sh->magic == CAMEL_OBJECT_CLASS_FINALIZED_VALUE) { - g_warning - ("shared_is_of_type: trying to cast finalized classdata " - "of `%s' into %s of `%s'", - camel_type_to_name (sh->type), targtype, - camel_type_to_name (ctype)); - return FALSE; - } - - if (is_obj) { - if (sh->magic == CAMEL_OBJECT_CLASS_MAGIC_VALUE) { - g_warning - ("shared_is_of_type: trying to cast classdata " - "of `%s' into instance of `%s'", - camel_type_to_name (sh->type), - camel_type_to_name (ctype)); - return FALSE; - } - - if (sh->magic != CAMEL_OBJECT_MAGIC_VALUE) { - g_warning - ("shared_is_of_type: trying to cast junk data " - "into instance of `%s'", - camel_type_to_name (ctype)); - return FALSE; - } - } else { - if (sh->magic == CAMEL_OBJECT_MAGIC_VALUE) { - g_warning - ("shared_is_of_type: trying to cast instance " - "of `%s' into classdata of `%s'", - camel_type_to_name (sh->type), - camel_type_to_name (ctype)); - return FALSE; - } - - if (sh->magic != CAMEL_OBJECT_CLASS_MAGIC_VALUE) { - g_warning - ("shared_is_of_type: trying to cast junk data " - "into classdata of `%s'", - camel_type_to_name (ctype)); - return FALSE; - } - } - - camel_type_lock_up (); - - type_info = - g_hash_table_lookup (ctype_to_typeinfo, - GINT_TO_POINTER (sh->type)); - - if (type_info == NULL) { - g_warning ("shared_is_of_type: seemingly valid %s has " - "bad type %d.", targtype, sh->type); - camel_type_lock_down (); - return FALSE; - } - - while (type_info) { - if (type_info->self == ctype) { - camel_type_lock_down (); - return TRUE; - } - - type_info = - g_hash_table_lookup (ctype_to_typeinfo, - GINT_TO_POINTER (type_info-> - parent)); - } - - /* this isn't an error, e.g. CAMEL_IS_FOLDER(folder), its upto the - caller to handle the false case */ - /*g_warning - ("shared_is_of_type: %s of `%s' (@%p) is not also %s of `%s'", - targtype, camel_type_to_name (sh->type), sh, targtype, - camel_type_to_name (ctype));*/ - - camel_type_lock_down (); - return FALSE; -} - -static void -make_global_classfuncs (CamelTypeInfo * type_info) -{ - CamelObjectClass *funcs; - GSList *parents; - GSList *head; - - g_assert (type_info); - - funcs = g_malloc0 (type_info->classfuncs_size); - funcs->s.type = type_info->self; - - type_info->global_classfuncs = funcs; - - parents = NULL; - while (type_info) { - parents = g_slist_prepend (parents, type_info); - type_info = - g_hash_table_lookup (ctype_to_typeinfo, - GINT_TO_POINTER (type_info-> - parent)); - } - - head = parents; - - for (; parents && parents->data; parents = parents->next) { - CamelTypeInfo *thisinfo; - - thisinfo = parents->data; - if (thisinfo->class_init) - (thisinfo->class_init) (funcs); - } - - g_slist_free (head); -} |