* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General
- * Public License along with this library; if not, write to the
- * Free Software Foundation, Inc., 59 Temple Place, Suite 330,
- * Boston, MA 02111-1307, USA.
+ * Public License along with this library; if not, see <http://www.gnu.org/licenses/>.
*
* gparam.h: GParamSpec base class implementation
*/
+#ifndef __G_PARAM_H__
+#define __G_PARAM_H__
+
#if !defined (__GLIB_GOBJECT_H_INSIDE__) && !defined (GOBJECT_COMPILATION)
#error "Only <glib-object.h> can be included directly."
#endif
-#ifndef __G_PARAM_H__
-#define __G_PARAM_H__
-
#include <gobject/gvalue.h>
G_BEGIN_DECLS
/* --- standard type macros --- */
+/**
+ * G_TYPE_IS_PARAM:
+ * @type: a #GType ID
+ *
+ * Checks whether @type "is a" %G_TYPE_PARAM.
+ */
#define G_TYPE_IS_PARAM(type) (G_TYPE_FUNDAMENTAL (type) == G_TYPE_PARAM)
+/**
+ * G_PARAM_SPEC:
+ * @pspec: a valid #GParamSpec
+ *
+ * Casts a derived #GParamSpec object (e.g. of type #GParamSpecInt) into
+ * a #GParamSpec object.
+ */
#define G_PARAM_SPEC(pspec) (G_TYPE_CHECK_INSTANCE_CAST ((pspec), G_TYPE_PARAM, GParamSpec))
+/**
+ * G_IS_PARAM_SPEC:
+ * @pspec: a #GParamSpec
+ *
+ * Checks whether @pspec "is a" valid #GParamSpec structure of type %G_TYPE_PARAM
+ * or derived.
+ */
+#if GLIB_VERSION_MAX_ALLOWED >= GLIB_VERSION_2_42
+#define G_IS_PARAM_SPEC(pspec) (G_TYPE_CHECK_INSTANCE_FUNDAMENTAL_TYPE ((pspec), G_TYPE_PARAM))
+#else
#define G_IS_PARAM_SPEC(pspec) (G_TYPE_CHECK_INSTANCE_TYPE ((pspec), G_TYPE_PARAM))
+#endif
+/**
+ * G_PARAM_SPEC_CLASS:
+ * @pclass: a valid #GParamSpecClass
+ *
+ * Casts a derived #GParamSpecClass structure into a #GParamSpecClass structure.
+ */
#define G_PARAM_SPEC_CLASS(pclass) (G_TYPE_CHECK_CLASS_CAST ((pclass), G_TYPE_PARAM, GParamSpecClass))
+/**
+ * G_IS_PARAM_SPEC_CLASS:
+ * @pclass: a #GParamSpecClass
+ *
+ * Checks whether @pclass "is a" valid #GParamSpecClass structure of type
+ * %G_TYPE_PARAM or derived.
+ */
#define G_IS_PARAM_SPEC_CLASS(pclass) (G_TYPE_CHECK_CLASS_TYPE ((pclass), G_TYPE_PARAM))
+/**
+ * G_PARAM_SPEC_GET_CLASS:
+ * @pspec: a valid #GParamSpec
+ *
+ * Retrieves the #GParamSpecClass of a #GParamSpec.
+ */
#define G_PARAM_SPEC_GET_CLASS(pspec) (G_TYPE_INSTANCE_GET_CLASS ((pspec), G_TYPE_PARAM, GParamSpecClass))
/* --- convenience macros --- */
+/**
+ * G_PARAM_SPEC_TYPE:
+ * @pspec: a valid #GParamSpec
+ *
+ * Retrieves the #GType of this @pspec.
+ */
#define G_PARAM_SPEC_TYPE(pspec) (G_TYPE_FROM_INSTANCE (pspec))
+/**
+ * G_PARAM_SPEC_TYPE_NAME:
+ * @pspec: a valid #GParamSpec
+ *
+ * Retrieves the #GType name of this @pspec.
+ */
#define G_PARAM_SPEC_TYPE_NAME(pspec) (g_type_name (G_PARAM_SPEC_TYPE (pspec)))
+/**
+ * G_PARAM_SPEC_VALUE_TYPE:
+ * @pspec: a valid #GParamSpec
+ *
+ * Retrieves the #GType to initialize a #GValue for this parameter.
+ */
#define G_PARAM_SPEC_VALUE_TYPE(pspec) (G_PARAM_SPEC (pspec)->value_type)
+/**
+ * G_VALUE_HOLDS_PARAM:
+ * @value: a valid #GValue structure
+ *
+ * Checks whether the given #GValue can hold values derived from type %G_TYPE_PARAM.
+ *
+ * Returns: %TRUE on success.
+ */
#define G_VALUE_HOLDS_PARAM(value) (G_TYPE_CHECK_VALUE_TYPE ((value), G_TYPE_PARAM))
/* --- flags --- */
+/**
+ * GParamFlags:
+ * @G_PARAM_READABLE: the parameter is readable
+ * @G_PARAM_WRITABLE: the parameter is writable
+ * @G_PARAM_READWRITE: alias for %G_PARAM_READABLE | %G_PARAM_WRITABLE
+ * @G_PARAM_CONSTRUCT: the parameter will be set upon object construction
+ * @G_PARAM_CONSTRUCT_ONLY: the parameter can only be set upon object construction
+ * @G_PARAM_LAX_VALIDATION: upon parameter conversion (see g_param_value_convert())
+ * strict validation is not required
+ * @G_PARAM_STATIC_NAME: the string used as name when constructing the
+ * parameter is guaranteed to remain valid and
+ * unmodified for the lifetime of the parameter.
+ * Since 2.8
+ * @G_PARAM_STATIC_NICK: the string used as nick when constructing the
+ * parameter is guaranteed to remain valid and
+ * unmmodified for the lifetime of the parameter.
+ * Since 2.8
+ * @G_PARAM_STATIC_BLURB: the string used as blurb when constructing the
+ * parameter is guaranteed to remain valid and
+ * unmodified for the lifetime of the parameter.
+ * Since 2.8
+ * @G_PARAM_EXPLICIT_NOTIFY: calls to g_object_set_property() for this
+ * property will not automatically result in a "notify" signal being
+ * emitted: the implementation must call g_object_notify() themselves
+ * in case the property actually changes. Since: 2.42.
+ * @G_PARAM_PRIVATE: internal
+ * @G_PARAM_DEPRECATED: the parameter is deprecated and will be removed
+ * in a future version. A warning will be generated if it is used
+ * while running with G_ENABLE_DIAGNOSTIC=1.
+ * Since 2.26
+ *
+ * Through the #GParamFlags flag values, certain aspects of parameters
+ * can be configured. See also #G_PARAM_STATIC_STRINGS.
+ */
typedef enum
{
G_PARAM_READABLE = 1 << 0,
G_PARAM_WRITABLE = 1 << 1,
+ G_PARAM_READWRITE = (G_PARAM_READABLE | G_PARAM_WRITABLE),
G_PARAM_CONSTRUCT = 1 << 2,
G_PARAM_CONSTRUCT_ONLY = 1 << 3,
G_PARAM_LAX_VALIDATION = 1 << 4,
- G_PARAM_PRIVATE = 1 << 5
+ G_PARAM_STATIC_NAME = 1 << 5,
+#ifndef G_DISABLE_DEPRECATED
+ G_PARAM_PRIVATE = G_PARAM_STATIC_NAME,
+#endif
+ G_PARAM_STATIC_NICK = 1 << 6,
+ G_PARAM_STATIC_BLURB = 1 << 7,
+ /* User defined flags go here */
+ G_PARAM_EXPLICIT_NOTIFY = 1 << 30,
+ G_PARAM_DEPRECATED = 1 << 31
} GParamFlags;
-#define G_PARAM_READWRITE (G_PARAM_READABLE | G_PARAM_WRITABLE)
-#define G_PARAM_MASK (0x000000ff)
+/**
+ * G_PARAM_STATIC_STRINGS:
+ *
+ * #GParamFlags value alias for %G_PARAM_STATIC_NAME | %G_PARAM_STATIC_NICK | %G_PARAM_STATIC_BLURB.
+ *
+ * Since 2.13.0
+ */
+#define G_PARAM_STATIC_STRINGS (G_PARAM_STATIC_NAME | G_PARAM_STATIC_NICK | G_PARAM_STATIC_BLURB)
/* bits in the range 0xffffff00 are reserved for 3rd party usage */
+/**
+ * G_PARAM_MASK:
+ *
+ * Mask containing the bits of #GParamSpec.flags which are reserved for GLib.
+ */
+#define G_PARAM_MASK (0x000000ff)
+/**
+ * G_PARAM_USER_SHIFT:
+ *
+ * Minimum shift count to be used for user defined flags, to be stored in
+ * #GParamSpec.flags. The maximum allowed is 10.
+ */
#define G_PARAM_USER_SHIFT (8)
-
/* --- typedefs & structures --- */
typedef struct _GParamSpec GParamSpec;
typedef struct _GParamSpecClass GParamSpecClass;
typedef struct _GParameter GParameter;
typedef struct _GParamSpecPool GParamSpecPool;
+/**
+ * GParamSpec:
+ * @g_type_instance: private #GTypeInstance portion
+ * @name: name of this parameter: always an interned string
+ * @flags: #GParamFlags flags for this parameter
+ * @value_type: the #GValue type for this parameter
+ * @owner_type: #GType type that uses (introduces) this parameter
+ *
+ * All other fields of the GParamSpec struct are private and
+ * should not be used directly.
+ */
struct _GParamSpec
{
GTypeInstance g_type_instance;
- gchar *name;
+ const gchar *name; /* interned string */
GParamFlags flags;
GType value_type;
- GType owner_type; /* class using this property */
+ GType owner_type; /* class or interface using this property */
/*< private >*/
gchar *_nick;
guint ref_count;
guint param_id; /* sort-criteria */
};
+/**
+ * GParamSpecClass:
+ * @g_type_class: the parent class
+ * @value_type: the #GValue type for this parameter
+ * @finalize: The instance finalization function (optional), should chain
+ * up to the finalize method of the parent class.
+ * @value_set_default: Resets a @value to the default value for this type
+ * (recommended, the default is g_value_reset()), see
+ * g_param_value_set_default().
+ * @value_validate: Ensures that the contents of @value comply with the
+ * specifications set out by this type (optional), see
+ * g_param_value_validate().
+ * @values_cmp: Compares @value1 with @value2 according to this type
+ * (recommended, the default is memcmp()), see g_param_values_cmp().
+ *
+ * The class structure for the GParamSpec type.
+ * Normally, GParamSpec classes are filled by
+ * g_param_type_register_static().
+ */
struct _GParamSpecClass
{
GTypeClass g_type_class;
gint (*values_cmp) (GParamSpec *pspec,
const GValue *value1,
const GValue *value2);
+ /*< private >*/
gpointer dummy[4];
};
-struct _GParameter /* auxillary structure for _setv() variants */
+/**
+ * GParameter:
+ * @name: the parameter name
+ * @value: the parameter value
+ *
+ * The GParameter struct is an auxiliary structure used
+ * to hand parameter name/value pairs to g_object_newv().
+ */
+struct _GParameter /* auxiliary structure for _setv() variants */
{
const gchar *name;
GValue value;
/* --- prototypes --- */
+GLIB_AVAILABLE_IN_ALL
GParamSpec* g_param_spec_ref (GParamSpec *pspec);
+GLIB_AVAILABLE_IN_ALL
void g_param_spec_unref (GParamSpec *pspec);
+GLIB_AVAILABLE_IN_ALL
void g_param_spec_sink (GParamSpec *pspec);
+GLIB_AVAILABLE_IN_ALL
+GParamSpec* g_param_spec_ref_sink (GParamSpec *pspec);
+GLIB_AVAILABLE_IN_ALL
gpointer g_param_spec_get_qdata (GParamSpec *pspec,
GQuark quark);
+GLIB_AVAILABLE_IN_ALL
void g_param_spec_set_qdata (GParamSpec *pspec,
GQuark quark,
gpointer data);
+GLIB_AVAILABLE_IN_ALL
void g_param_spec_set_qdata_full (GParamSpec *pspec,
GQuark quark,
gpointer data,
GDestroyNotify destroy);
+GLIB_AVAILABLE_IN_ALL
gpointer g_param_spec_steal_qdata (GParamSpec *pspec,
GQuark quark);
+GLIB_AVAILABLE_IN_ALL
+GParamSpec* g_param_spec_get_redirect_target (GParamSpec *pspec);
+
+GLIB_AVAILABLE_IN_ALL
void g_param_value_set_default (GParamSpec *pspec,
GValue *value);
+GLIB_AVAILABLE_IN_ALL
gboolean g_param_value_defaults (GParamSpec *pspec,
GValue *value);
+GLIB_AVAILABLE_IN_ALL
gboolean g_param_value_validate (GParamSpec *pspec,
GValue *value);
+GLIB_AVAILABLE_IN_ALL
gboolean g_param_value_convert (GParamSpec *pspec,
const GValue *src_value,
GValue *dest_value,
gboolean strict_validation);
+GLIB_AVAILABLE_IN_ALL
gint g_param_values_cmp (GParamSpec *pspec,
const GValue *value1,
const GValue *value2);
-G_CONST_RETURN gchar* g_param_spec_get_name (GParamSpec *pspec);
-G_CONST_RETURN gchar* g_param_spec_get_nick (GParamSpec *pspec);
-G_CONST_RETURN gchar* g_param_spec_get_blurb (GParamSpec *pspec);
+GLIB_AVAILABLE_IN_ALL
+const gchar * g_param_spec_get_name (GParamSpec *pspec);
+GLIB_AVAILABLE_IN_ALL
+const gchar * g_param_spec_get_nick (GParamSpec *pspec);
+GLIB_AVAILABLE_IN_ALL
+const gchar * g_param_spec_get_blurb (GParamSpec *pspec);
+GLIB_AVAILABLE_IN_ALL
void g_value_set_param (GValue *value,
GParamSpec *param);
+GLIB_AVAILABLE_IN_ALL
GParamSpec* g_value_get_param (const GValue *value);
+GLIB_AVAILABLE_IN_ALL
GParamSpec* g_value_dup_param (const GValue *value);
+GLIB_AVAILABLE_IN_ALL
void g_value_take_param (GValue *value,
GParamSpec *param);
-#ifndef G_DISABLE_DEPRECATED
+GLIB_DEPRECATED_FOR(g_value_take_param)
void g_value_set_param_take_ownership (GValue *value,
- GParamSpec *param);
-#endif
+ GParamSpec *param);
+GLIB_AVAILABLE_IN_2_36
+const GValue * g_param_spec_get_default_value (GParamSpec *param);
/* --- convenience functions --- */
typedef struct _GParamSpecTypeInfo GParamSpecTypeInfo;
+/**
+ * GParamSpecTypeInfo:
+ * @instance_size: Size of the instance (object) structure.
+ * @n_preallocs: Prior to GLib 2.10, it specified the number of pre-allocated (cached) instances to reserve memory for (0 indicates no caching). Since GLib 2.10, it is ignored, since instances are allocated with the [slice allocator][glib-Memory-Slices] now.
+ * @instance_init: Location of the instance initialization function (optional).
+ * @value_type: The #GType of values conforming to this #GParamSpec
+ * @finalize: The instance finalization function (optional).
+ * @value_set_default: Resets a @value to the default value for @pspec
+ * (recommended, the default is g_value_reset()), see
+ * g_param_value_set_default().
+ * @value_validate: Ensures that the contents of @value comply with the
+ * specifications set out by @pspec (optional), see
+ * g_param_value_validate().
+ * @values_cmp: Compares @value1 with @value2 according to @pspec
+ * (recommended, the default is memcmp()), see g_param_values_cmp().
+ *
+ * This structure is used to provide the type system with the information
+ * required to initialize and destruct (finalize) a parameter's class and
+ * instances thereof.
+ * The initialized structure is passed to the g_param_type_register_static()
+ * The type system will perform a deep copy of this structure, so its memory
+ * does not need to be persistent across invocation of
+ * g_param_type_register_static().
+ */
struct _GParamSpecTypeInfo
{
/* type system portion */
const GValue *value1,
const GValue *value2);
};
+GLIB_AVAILABLE_IN_ALL
GType g_param_type_register_static (const gchar *name,
const GParamSpecTypeInfo *pspec_info);
/* --- protected --- */
+GLIB_AVAILABLE_IN_ALL
gpointer g_param_spec_internal (GType param_type,
const gchar *name,
const gchar *nick,
const gchar *blurb,
GParamFlags flags);
+GLIB_AVAILABLE_IN_ALL
GParamSpecPool* g_param_spec_pool_new (gboolean type_prefixing);
+GLIB_AVAILABLE_IN_ALL
void g_param_spec_pool_insert (GParamSpecPool *pool,
GParamSpec *pspec,
GType owner_type);
+GLIB_AVAILABLE_IN_ALL
void g_param_spec_pool_remove (GParamSpecPool *pool,
GParamSpec *pspec);
+GLIB_AVAILABLE_IN_ALL
GParamSpec* g_param_spec_pool_lookup (GParamSpecPool *pool,
const gchar *param_name,
GType owner_type,
gboolean walk_ancestors);
+GLIB_AVAILABLE_IN_ALL
GList* g_param_spec_pool_list_owned (GParamSpecPool *pool,
GType owner_type);
+GLIB_AVAILABLE_IN_ALL
GParamSpec** g_param_spec_pool_list (GParamSpecPool *pool,
GType owner_type,
guint *n_pspecs_p);
-
/* contracts:
*
* gboolean value_validate (GParamSpec *pspec,
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