implemented destructors.

1999-08-11  bertrand  <Bertrand.Guiheneuf@aful.org>

	* camel/camel-multipart.c (_finalize):
	* camel/camel-simple-data-wrapper.c (_finalize):
	* camel/camel-mime-part.c (_finalize):
	implemented destructors.

	* camel/gmime-content-field.c (gmime_content_field_ref):
	(gmime_content_field_unref):
	New reference mechanism for GMimeContentField objects.

	* camel/camel-data-wrapper.c (_finalize):
	Started implementing destructors.

	* camel/camel-mime-part.c (_construct_from_stream):
	* camel/gmime-content-field.c (gmime_content_field_write_to_stream):
	* camel/camel-multipart.c (_construct_from_stream):
	removed forgotten anarchic traces.


Go away memory leaks!

svn path=/trunk/; revision=1103

7 files changed, 227 insertions, 37 deletions

diff --git a/camel/camel-data-wrapper.c b/camel/camel-data-wrapper.c
index ef8c325293..579f32f023 100644
--- a/camel/camel-data-wrapper.c
+++ b/camel/camel-data-wrapper.c
@@ -38,11 +38,13 @@ static void _set_mime_type (CamelDataWrapper *data_wrapper, gchar *mime_type);
 static gchar *_get_mime_type (CamelDataWrapper *data_wrapper);
 static GMimeContentField *_get_mime_type_field (CamelDataWrapper *data_wrapper);
 static void _set_mime_type_field (CamelDataWrapper *data_wrapper, GMimeContentField *mime_type);
-
+static void _finalize (GtkObject *object);
 
 static void
 camel_data_wrapper_class_init (CamelDataWrapperClass *camel_data_wrapper_class)
 {
+	GtkObjectClass *gtk_object_class = GTK_OBJECT_CLASS (camel_data_wrapper_class);
+
 	parent_class = gtk_type_class (gtk_object_get_type ());
 	
 	/* virtual method definition */
@@ -52,7 +54,9 @@ camel_data_wrapper_class_init (CamelDataWrapperClass *camel_data_wrapper_class)
 	camel_data_wrapper_class->get_mime_type = _get_mime_type;
 	camel_data_wrapper_class->get_mime_type_field = _get_mime_type_field;
 	camel_data_wrapper_class->set_mime_type_field = _set_mime_type_field;
+
 	/* virtual method overload */
+	gtk_object_class->finalize = _finalize;
 }
 
 
@@ -96,6 +100,20 @@ camel_data_wrapper_get_type (void)
 }
 
 
+static void           
+_finalize (GtkObject *object)
+{
+	CamelDataWrapper *camel_data_wrapper = CAMEL_DATA_WRAPPER (object);
+
+	CAMEL_LOG_FULL_DEBUG ("Entering CamelDataWrapper::finalize\n");
+	printf ("CamelDataWrapper::finalize, finalizing object %p\n", object);
+	if (camel_data_wrapper->mime_type)
+		gmime_content_field_unref (camel_data_wrapper->mime_type);
+
+	parent_class->finalize (object);
+	CAMEL_LOG_FULL_DEBUG ("Leaving CamelDataWrapper::finalize\n");
+}
+
 
 /**
  * _write_to_stream: write data content in a byte stream
diff --git a/camel/camel-mime-message.c b/camel/camel-mime-message.c
index a6ff2482a6..1563c0cb1d 100644
--- a/camel/camel-mime-message.c
+++ b/camel/camel-mime-message.c
@@ -74,6 +74,8 @@ static guint _get_message_number (CamelMimeMessage *mime_message);
 static void _write_to_stream (CamelDataWrapper *data_wrapper, CamelStream *stream);
 static gboolean _parse_header_pair (CamelMimePart *mime_part, gchar *header_name, gchar *header_value);
 
+static void _finalize (GtkObject *object);
+
 /* Returns the class for a CamelMimeMessage */
 #define CMM_CLASS(so) CAMEL_MIME_MESSAGE_CLASS (GTK_OBJECT(so)->klass)
 #define CDW_CLASS(so) CAMEL_DATA_WRAPPER_CLASS (GTK_OBJECT(so)->klass)
@@ -97,6 +99,7 @@ camel_mime_message_class_init (CamelMimeMessageClass *camel_mime_message_class)
 {
 	CamelDataWrapperClass *camel_data_wrapper_class = CAMEL_DATA_WRAPPER_CLASS (camel_mime_message_class);
 	CamelMimePartClass *camel_mime_part_class = CAMEL_MIME_PART_CLASS (camel_mime_message_class);
+	GtkObjectClass *gtk_object_class = GTK_OBJECT_CLASS (camel_data_wrapper_class);
 
 	parent_class = gtk_type_class (camel_mime_part_get_type ());
 	_init_header_name_table();
@@ -129,6 +132,7 @@ camel_mime_message_class_init (CamelMimeMessageClass *camel_mime_message_class)
 	camel_data_wrapper_class->write_to_stream = _write_to_stream;
 	camel_mime_part_class->parse_header_pair = _parse_header_pair;
 
+	gtk_object_class->finalize = _finalize;
 }
 
 
@@ -168,12 +172,36 @@ camel_mime_message_get_type (void)
 }
 
 
+static void           
+_finalize (GtkObject *object)
+{
+	CamelMimeMessage *message = CAMEL_MIME_MESSAGE (object);
+
+	CAMEL_LOG_FULL_DEBUG ("Entering CamelMimeMessage::finalize\n");
+	if (message->received_date) g_free (message->received_date);
+	if (message->sent_date) g_free (message->sent_date);
+	if (message->subject) g_free (message->subject);
+	if (message->reply_to) g_free (message->reply_to);
+	if (message->from) g_free (message->from);
+		
+#warning free recipients and flags.
+	if (message->folder) gtk_object_unref (GTK_OBJECT (message->folder));
+	if (message->session) gtk_object_unref (GTK_OBJECT (message->session));
+	
+	GTK_OBJECT_CLASS (parent_class)->finalize (object);
+	CAMEL_LOG_FULL_DEBUG ("Leaving CamelMimeMessage::finalize\n");
+}
+
+
+
 CamelMimeMessage *
 camel_mime_message_new_with_session (CamelSession *session) 
 {
 	CamelMimeMessage *mime_message;
 	mime_message = gtk_type_new (CAMEL_MIME_MESSAGE_TYPE);
 	mime_message->session = session;
+	if (session) gtk_object_ref (GTK_OBJECT (session));
+
 	return mime_message;
 }
 
diff --git a/camel/camel-mime-part.c b/camel/camel-mime-part.c
index 39cdbe5cba..fb1caaa70c 100644
--- a/camel/camel-mime-part.c
+++ b/camel/camel-mime-part.c
@@ -80,6 +80,7 @@ static void _write_to_stream (CamelDataWrapper *data_wrapper, CamelStream *strea
 static gboolean _parse_header_pair (CamelMimePart *mime_part, gchar *header_name, gchar *header_value);
 void _construct_from_stream (CamelDataWrapper *data_wrapper, CamelStream *stream);
 
+static void _finalize (GtkObject *object);
 
 /* loads in a hash table the set of header names we */
 /* recognize and associate them with a unique enum  */
@@ -101,6 +102,8 @@ static void
 camel_mime_part_class_init (CamelMimePartClass *camel_mime_part_class)
 {
 	CamelDataWrapperClass *camel_data_wrapper_class = CAMEL_DATA_WRAPPER_CLASS (camel_mime_part_class);
+	GtkObjectClass *gtk_object_class = GTK_OBJECT_CLASS (camel_data_wrapper_class);
+
 	parent_class = gtk_type_class (camel_data_wrapper_get_type ());
 	_init_header_name_table();
 	
@@ -136,6 +139,8 @@ camel_mime_part_class_init (CamelMimePartClass *camel_mime_part_class)
 	/* virtual method overload */
 	camel_data_wrapper_class->write_to_stream = _write_to_stream;
 	camel_data_wrapper_class->construct_from_stream = _construct_from_stream;
+
+	gtk_object_class->finalize = _finalize;
 }
 
 static void
@@ -175,6 +180,39 @@ camel_mime_part_get_type (void)
 }
 
 
+static void           
+_finalize (GtkObject *object)
+{
+	CamelMimePart *mime_part = CAMEL_MIME_PART (object);
+
+#warning do something for (mime_part->disposition) which should not be a GMimeContentField
+
+	CAMEL_LOG_FULL_DEBUG ("Entering CamelMimePart::finalize\n");
+
+	if (mime_part->headers) {
+#warning Free hash table elements
+		g_hash_table_destroy (mime_part->headers);
+	}
+
+	if (mime_part->description) g_free (mime_part->description);
+	if (mime_part->disposition) gmime_content_field_unref (mime_part->disposition);
+	if (mime_part->content_id) g_free (mime_part->content_id);
+	if (mime_part->content_MD5) g_free (mime_part->content_MD5);
+	if (mime_part->content_languages) string_list_free (mime_part->content_languages);
+	if (mime_part->encoding) g_free (mime_part->encoding);
+	if (mime_part->filename) g_free (mime_part->filename);
+	if (mime_part->header_lines) string_list_free (mime_part->header_lines);
+
+	if (mime_part->content_type) gmime_content_field_unref (mime_part->content_type);
+	if (mime_part->content) {
+		CAMEL_LOG_FULL_DEBUG ("CamelMimePart::finalize, unreferencing content object\n");
+		CAMEL_LOG_FULL_DEBUG ("CamelMimePart::finalize,Destroying  object %p\n", mime_part->content);
+		CAMEL_LOG_FULL_DEBUG ("CamelMimePart::finalize, object type : %s\n", gtk_type_name (GTK_OBJECT_TYPE (mime_part->content)));
+		gtk_object_unref (GTK_OBJECT (mime_part->content));
+	}
+	GTK_OBJECT_CLASS (parent_class)->finalize (object);
+	CAMEL_LOG_FULL_DEBUG ("Leaving CamelMimePart::finalize\n");
+}
 
 
 static void
@@ -546,8 +584,9 @@ _set_content_object(CamelMimePart *mime_part, CamelDataWrapper *content)
 	mime_part->content = content;
 	object_content_field = camel_data_wrapper_get_mime_type_field (content);
 	if (mime_part->content_type && (mime_part->content_type != object_content_field)) 
-		gmime_content_field_free (mime_part->content_type);
+		gmime_content_field_unref (mime_part->content_type);
 	mime_part->content_type = object_content_field;
+	gmime_content_field_ref (object_content_field);
 	CAMEL_LOG_FULL_DEBUG ("Leaving CamelMimePart::set_content_object\n");
 	
 }
@@ -757,26 +796,28 @@ _construct_from_stream (CamelDataWrapper *data_wrapper, CamelStream *stream)
 	CAMEL_LOG_FULL_DEBUG ("CamelMimePart::construct_from_stream parsing content\n");
 	content_type = camel_mime_part_get_content_type (mime_part);
 	mime_type = gmime_content_field_get_mime_type (content_type);
-	printf ("Content-Type address = %p\n", content_type);
+	
 	if (!mime_type) {
 		CAMEL_LOG_FULL_DEBUG ("CamelMimePart::construct_from_stream content type field not found " 
 				      "using default \"text/plain\"\n");
 		mime_type = g_strdup ("text/plain");
 		camel_mime_part_set_content_type (mime_part, mime_type);
 	}
-		content_object_type = data_wrapper_repository_get_data_wrapper_type (mime_type);
-		
-		CAMEL_LOG_FULL_DEBUG ("CamelMimePart::construct_from_stream content type object type used: %s\n", gtk_type_name (content_object_type));
-		g_free (mime_type);
-		content_object = CAMEL_DATA_WRAPPER (gtk_type_new (content_object_type));
-		camel_data_wrapper_set_mime_type_field (content_object, camel_mime_part_get_content_type (mime_part));
-		camel_mime_part_set_content_object (mime_part, content_object);
-		camel_data_wrapper_construct_from_stream (content_object, stream);
-		
+	content_object_type = data_wrapper_repository_get_data_wrapper_type (mime_type);
 	
-		
-	CAMEL_LOG_FULL_DEBUG ("CamelMimePart::construct_from_stream content parsed\n");
+	CAMEL_LOG_FULL_DEBUG ("CamelMimePart::construct_from_stream content type object type used: %s\n", gtk_type_name (content_object_type));
+	g_free (mime_type);
+	content_object = CAMEL_DATA_WRAPPER (gtk_type_new (content_object_type));
+	camel_data_wrapper_set_mime_type_field (content_object, camel_mime_part_get_content_type (mime_part));
+	camel_mime_part_set_content_object (mime_part, content_object);
+	camel_data_wrapper_construct_from_stream (content_object, stream);
 
+	/* the object is referenced in the set_content_object method, so unref it here */
+	gtk_object_unref (GTK_OBJECT (content_object));
+	
+	
+	CAMEL_LOG_FULL_DEBUG ("CamelMimePart::construct_from_stream content parsed\n");
+	
 	
 	CAMEL_LOG_FULL_DEBUG ("CamelMimePart:: Leaving _construct_from_stream\n");
 }
@@ -812,6 +853,7 @@ camel_mime_part_set_text (CamelMimePart *camel_mime_part, gchar *text)
 		camel_data_wrapper_set_mime_type (CAMEL_DATA_WRAPPER (simple_data_wrapper), "text/plain");
 		camel_simple_data_wrapper_set_text ( simple_data_wrapper, text);
 		camel_mime_part_set_content_object (camel_mime_part, CAMEL_DATA_WRAPPER (simple_data_wrapper));
+		gtk_object_unref (GTK_OBJECT (simple_data_wrapper));
 	} else camel_mime_part->content = NULL;
 		
 		CAMEL_LOG_FULL_DEBUG ("CamelMimePart:: Leaving camel_mime_part_set_text\n");
diff --git a/camel/camel-multipart.c b/camel/camel-multipart.c
index 20a790465c..17f79cdd97 100644
--- a/camel/camel-multipart.c
+++ b/camel/camel-multipart.c
@@ -43,6 +43,8 @@ static const gchar *_get_boundary (CamelMultipart *multipart);
 static void _write_to_stream (CamelDataWrapper *data_wrapper, CamelStream *stream);
 static void _construct_from_stream (CamelDataWrapper *data_wrapper, CamelStream *stream);
 
+static void _finalize (GtkObject *object);
+
 static CamelDataWrapperClass *parent_class=NULL;
 
 /* Returns the class for a CamelMultipart */
@@ -56,6 +58,8 @@ static void
 camel_multipart_class_init (CamelMultipartClass *camel_multipart_class)
 {
 	CamelDataWrapperClass *camel_data_wrapper_class = CAMEL_DATA_WRAPPER_CLASS (camel_multipart_class);
+	GtkObjectClass *gtk_object_class = GTK_OBJECT_CLASS (camel_multipart_class);
+
 	parent_class = gtk_type_class (camel_data_wrapper_get_type ());
 		
 	/* virtual method definition */
@@ -73,6 +77,8 @@ camel_multipart_class_init (CamelMultipartClass *camel_multipart_class)
 	/* virtual method overload */
 	camel_data_wrapper_class->write_to_stream = _write_to_stream;
 	camel_data_wrapper_class->construct_from_stream = _construct_from_stream;
+
+	gtk_object_class->finalize = _finalize;
 }
 
 static void
@@ -113,6 +119,33 @@ camel_multipart_get_type (void)
 	return camel_multipart_type;
 }
 
+static void
+_unref_part (gpointer data, gpointer user_data)
+{
+	GtkObject *body_part = GTK_OBJECT (data);
+	
+	gtk_object_unref (body_part);
+}
+
+static void           
+_finalize (GtkObject *object)
+{
+	CamelMultipart *multipart = CAMEL_MULTIPART (object);
+
+	CAMEL_LOG_FULL_DEBUG ("Entering CamelMultipart::finalize\n");
+
+	if (multipart->parent) gtk_object_unref (GTK_OBJECT (multipart->parent));
+
+	g_list_foreach (multipart->parts, _unref_part, NULL);
+	
+	if (multipart->boundary) g_free (multipart->boundary);
+	if (multipart->preface)  g_free (multipart->preface);
+	if (multipart->postface) g_free (multipart->postface);
+
+	GTK_OBJECT_CLASS (parent_class)->finalize (object);
+	CAMEL_LOG_FULL_DEBUG ("Leaving CamelMultipart::finalize\n");
+}
+
 
 CamelMultipart *
 camel_multipart_new ()
@@ -123,7 +156,8 @@ camel_multipart_new ()
 	multipart = (CamelMultipart *)gtk_type_new (CAMEL_MULTIPART_TYPE);
 	multipart->preface = NULL;
 	multipart->postface = NULL;
-	
+
+
 	CAMEL_LOG_FULL_DEBUG ("CamelMultipart:: Leaving new()\n");
 	return multipart;
 }
@@ -133,6 +167,7 @@ static void
 _add_part (CamelMultipart *multipart, CamelMimeBodyPart *part)
 {
 	multipart->parts = g_list_append (multipart->parts, part);
+	if (part) gtk_object_ref (GTK_OBJECT (part));
 }
 
 void 
@@ -146,6 +181,7 @@ static void
 _add_part_at (CamelMultipart *multipart, CamelMimeBodyPart *part, guint index)
 {
 	multipart->parts = g_list_insert (multipart->parts, part, index);
+	if (part) gtk_object_ref (GTK_OBJECT (part));
 }
 
 void 
@@ -162,6 +198,7 @@ _remove_part (CamelMultipart *multipart, CamelMimeBodyPart *part)
 		return;
 	}
 	multipart->parts = g_list_remove (multipart->parts, part);
+	if (part) gtk_object_unref (GTK_OBJECT (part));
 }
 
 void 
@@ -197,8 +234,9 @@ _remove_part_at (CamelMultipart *multipart, guint index)
 	removed_body_part = CAMEL_MIME_BODY_PART (part_to_remove->data);
 
 	multipart->parts = g_list_remove_link (parts_list, part_to_remove);
+	if (part_to_remove->data) gtk_object_unref (GTK_OBJECT (part_to_remove->data));
 	g_list_free_1 (part_to_remove);
-
+	
 	CAMEL_LOG_FULL_DEBUG ("CamelMultipart:: Leaving remove_part_at\n");
 	return removed_body_part;
 	
@@ -252,6 +290,7 @@ static void
 _set_parent (CamelMultipart *multipart, CamelMimePart *parent)
 {
 	multipart->parent = parent;
+	if (parent) gtk_object_ref (GTK_OBJECT (parent));
 }
 
 void
@@ -390,7 +429,6 @@ _read_part (CamelStream *new_part_stream, CamelStream *stream, gchar *normal_bou
 
 	new_line = gmime_read_line_from_stream (stream);
 	while (new_line && !end_of_part && !last_part) {
-		printf ("++ new line = \"%s\"\n", new_line);
 		end_of_part = (strcmp (new_line, normal_boundary) == 0);
 		last_part   = (strcmp (new_line, end_boundary) == 0);
 		if (!end_of_part && !last_part) {
diff --git a/camel/camel-simple-data-wrapper.c b/camel/camel-simple-data-wrapper.c
index a2203a52e8..99bd0b2075 100644
--- a/camel/camel-simple-data-wrapper.c
+++ b/camel/camel-simple-data-wrapper.c
@@ -32,18 +32,22 @@ static  CamelDataWrapperClass *parent_class=NULL;
 
 static void _construct_from_stream (CamelDataWrapper *data_wrapper, CamelStream *stream);
 static void _write_to_stream (CamelDataWrapper *data_wrapper, CamelStream *stream);
+static void _finalize (GtkObject *object);
 
 static void
 camel_simple_data_wrapper_class_init (CamelSimpleDataWrapperClass *camel_simple_data_wrapper_class)
 {
 	CamelDataWrapperClass *camel_data_wrapper_class = CAMEL_DATA_WRAPPER_CLASS (camel_simple_data_wrapper_class);
-	
+	GtkObjectClass *gtk_object_class = GTK_OBJECT_CLASS (camel_data_wrapper_class);
+
 	parent_class = gtk_type_class (camel_data_wrapper_get_type ());
 	/* virtual method definition */
 
 	/* virtual method overload */
 	camel_data_wrapper_class->write_to_stream = _write_to_stream;
 	camel_data_wrapper_class->construct_from_stream = _construct_from_stream;
+
+	gtk_object_class->finalize = _finalize;
 }
 
 
@@ -76,6 +80,18 @@ camel_simple_data_wrapper_get_type (void)
 }
 
 
+static void           
+_finalize (GtkObject *object)
+{
+	CamelSimpleDataWrapper *simple_data_wrapper = CAMEL_SIMPLE_DATA_WRAPPER (object);
+
+	CAMEL_LOG_FULL_DEBUG ("Entering CamelMimePart::finalize\n");
+	if (simple_data_wrapper->byte_array) g_byte_array_free (simple_data_wrapper->byte_array, TRUE);
+
+	GTK_OBJECT_CLASS (parent_class)->finalize (object);
+	CAMEL_LOG_FULL_DEBUG ("Leaving CamelMimePart::finalize\n");
+}
+
 
 /**
  * camel_simple_data_wrapper_new: create a new CamelSimpleDataWrapper object
diff --git a/camel/gmime-content-field.c b/camel/gmime-content-field.c
index 285926e702..04b07b7626 100644
--- a/camel/gmime-content-field.c
+++ b/camel/gmime-content-field.c
@@ -50,11 +50,72 @@ gmime_content_field_new (const gchar *type, const gchar *subtype)
 	ctf->type = g_strdup (type);
 	ctf->subtype = g_strdup (subtype);
 	ctf->parameters =  g_hash_table_new (g_str_hash, g_str_equal);
-	
+	ctf->ref = 1;
+
 	return ctf;
 } 
 
 
+static void
+_free_parameter (gpointer name, gpointer value, gpointer user_data)
+{
+	g_free (name);
+	g_free (value);
+}
+
+/**
+ * gmime_content_field_free: free a GMimeContentField object
+ * @content_field: GMimeContentField object
+ * 
+ * This method destroys the object and should be used very carefully.
+ * Use gmime_content_field_unref instead.
+ *
+ **/
+void 
+gmime_content_field_free (GMimeContentField *content_field)
+{
+	g_hash_table_foreach (content_field->parameters, _free_parameter, NULL);
+	g_free (content_field->type);
+	g_free (content_field->subtype);
+	g_hash_table_destroy (content_field->parameters);
+	g_free (content_field);
+}
+
+/**
+ * gmime_content_field_ref: add a reference to a GMimeContentField object
+ * @content_field: GMimeContentField object
+ * 
+ * Tell a GMimeContentField object that something holds a reference
+ * on him. This, coupled with the corresponding 
+ * gmime_content_field_unref() method allow several 
+ * objects to use the same GMimeContentField object.
+ **/
+void 
+gmime_content_field_ref (GMimeContentField *content_field)
+{
+	content_field->ref += 1;
+}
+
+/**
+ * gmime_content_field_unref: remove a reference to a GMimeContentField object
+ * @content_field: GMimeContentField object
+ * 
+ * Tell a GMimeContentField object that something which 
+ * was holding a reference to him does not need it anymore.
+ * When no more reference exist, the GMimeContentField object
+ * is freed using gmime_content_field_free().
+ *
+ **/
+void 
+gmime_content_field_unref (GMimeContentField *content_field)
+{
+	content_field->ref -= 1;
+	if (content_field->ref <= 0)
+		gmime_content_field_free (content_field);
+}
+
+
+
 /**
  * gmime_content_field_set_parameter: set a parameter for a GMimeContentField object
  * @content_field: content field
@@ -125,7 +186,6 @@ gmime_content_field_write_to_stream (GMimeContentField *content_field, CamelStre
 	if (!content_field) return;
 
 	g_assert (stream);
-	printf ("Content-field address = %p\n", content_field);
 	if (content_field->type) {
 		camel_stream_write_strings (stream, "Content-Type: ", content_field->type, NULL);
 		if (content_field->subtype) {
@@ -304,20 +364,3 @@ gmime_content_field_construct_from_string (GMimeContentField *content_field, con
 
 }
 
-
-static void
-_free_parameter (gpointer name, gpointer value, gpointer user_data)
-{
-	g_free (name);
-	g_free (value);
-}
-
-void 
-gmime_content_field_free (GMimeContentField *content_field)
-{
-	g_hash_table_foreach (content_field->parameters, _free_parameter, NULL);
-	g_free (content_field->type);
-	g_free (content_field->subtype);
-	g_hash_table_destroy (content_field->parameters);
-	g_free (content_field);
-}
diff --git a/camel/gmime-content-field.h b/camel/gmime-content-field.h
index 663c747291..01045545ec 100644
--- a/camel/gmime-content-field.h
+++ b/camel/gmime-content-field.h
@@ -41,9 +41,14 @@ typedef struct {
 	gchar *subtype;
 	GHashTable *parameters;
 
+	gint ref;
+
 } GMimeContentField;
 
 GMimeContentField *gmime_content_field_new (const gchar *type, const gchar *subtype);
+void gmime_content_field_ref (GMimeContentField *content_field);
+void gmime_content_field_unref (GMimeContentField *content_field);
+
 void gmime_content_field_set_parameter (GMimeContentField *content_field, const gchar *attribute, const gchar *value);
 void gmime_content_field_write_to_stream (GMimeContentField *content_field, CamelStream *stream);
 void gmime_content_field_construct_from_string (GMimeContentField *content_field, const gchar *string);