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-rw-r--r--camel/camel-object.c949
1 files changed, 931 insertions, 18 deletions
diff --git a/camel/camel-object.c b/camel/camel-object.c
index 3edce10d8a..849d47612e 100644
--- a/camel/camel-object.c
+++ b/camel/camel-object.c
@@ -26,32 +26,945 @@
#include <config.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_object_init (gpointer object, gpointer klass)
+camel_type_lock_up (void)
{
- GTK_OBJECT_UNSET_FLAGS (object, GTK_FLOATING);
+ 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);
}
-GtkType
-camel_object_get_type (void)
+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));
+ 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)
{
- static GtkType camel_object_type = 0;
+ 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 (!camel_object_type) {
- GtkTypeInfo camel_object_info =
- {
- "CamelObject",
- sizeof (CamelObject),
- sizeof (CamelObjectClass),
- (GtkClassInitFunc) NULL,
- (GtkObjectInitFunc) camel_object_init,
- /* reserved_1 */ NULL,
- /* reserved_2 */ NULL,
- (GtkClassInitFunc) NULL,
- };
+ 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));
- camel_object_type = gtk_type_unique (gtk_object_get_type (), &camel_object_info);
+ 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) {
+ g_hash_table_foreach (obj->event_to_hooklist, (GHFunc) g_free,
+ NULL);
+ 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;
+
+ 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;
+
+ hooklist = g_hash_table_lookup (obj->event_to_hooklist, name);
+ hooklist = g_slist_prepend (hooklist, 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, 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));
+ }
+
+ 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);
+}